In this study, the adsorption characteristics of cadmium by the natural zeolite have been experimentally investigated in a circular flume. The effect of various parameters, such as initial cadmium and zeolite concentrations has been studied to get enhanced simulations for the natural conditions.
The optimum equilibrium time was found to be 2 to 3 hr, which was independent of initial cadmium concentration 2016 ITA Environmental Technologies Top Markets Report | 1. This case study is part of a larger Top Markets Report. For additional content Remediate contaminated sites;. 6. Design greater regulatory burden that is applied in order to..
Eco-industrial parks: a case study and analysis of - rti international
The adsorption values increase by decreasing the initial cadmium concentration. The results of this study also showed that the absorption rate of zeolite increases from 33.
23 -1, but removal percentage of natural zeolite is reduced from 45.
In addition, with increasing the zeolite concentration from 3 to 20 -1, the absorption rate decreased from 123. The results showed that pseudo second order model best described the adsorption rate.
This study aims to investigate total coliform (TC) and thermotolerant coliform (TTC) removal efficiency of the waste stabilisation ponds (WSPs) system in Central India through the dispersed flow regime. To accomplish this, coliform (TC and TTC) die-off coefficient (Kb) was estimated for each pond (anaerobic, facultative and maturation) by the dispersed flow regime.
Maximum Kb value was observed for the maturation pond (Kb, 5. 8) and satisfactory correlate with the pond's depth (R , 0.
On comparing coliform (TC and TTC) removal efficiency of different ponds in different seasons (viz; post monsoon, winter and summer), it was observed that total and thermotolerant coliform load increased in the post monsoon season. This was attributed to differences in the prevalence of infection and fecal excretion levels and due to the mixing of runaway water with raw sewage during the monsoon, which increased the bacterial load.
Applying the dispersed flow model to assay coliform removal efficiency of WSPs system, we concluded that shallow ponds with a higher hydraulic detention time have good removal efficiency compared to deep ponds with lower hydraulic detention time. This paper presents a consumption-based method accounting for greenhouse gas emissions at regional level based on a multi-region input-output model.
The method is based on regional consumption and includes imports and exports of emissions, factual emission developments, green investments as well as low carbon development policies. We comparatively analyse three regional case studies in Denmark and show how regional initiatives implemented to reduce emissions are translated into easy to access input-output parameter changes and how the method transparently assesses the impact of various long-term regional climate plans on emissions.
For the comparative analysis we further develop a carbon regional index (CRI), which delineates five key dimensions that define past, current and planned regional and embedded emissions. The method can form a basis for regional climate policies, promote the export of solutions from one region to another and enable policy-makers to observe good practices and test them at regional level before potential implementation on a larger scale.
Determination of safe and optimal routes for biomedical waste (BMW) collection and transportation using a fleet of vehicles is a complex issue. The issue gets significant, when the vehicles that outset from multiple depots, collects the BMW from hospitals scattered around a region and carry the waste to multiple disposal sites.
The present paper deals with the development of a modified ACS-based approach to determine the optimal and safest route for BMW collection and transportation for such situation. The major objectives considered for route selection of vehicles, are the risk associated with the collection and transportation of BMW; total scheduling time of vehicles and number of vehicles.
In this approach, clusters of the hospital nodes are constituted based on their distance from the nearest depot and late time window associated with the hospital node. Thereafter, the routes are scheduled and optimised using modified multi-objective ant colony system (MOACS).
The computed results are validated abreast with benchmark solutions, demonstrating effectiveness of the proposed approach.
A sampling of successes in green public procurement - green growth
In the present work, heavy metal contamination of water and soil in western Uttar Pradesh terrain, India was assessed.
About 16 boreholes and tap water samples and ten soil samples were studied using atomic absorption spectrophotometer (AAS) for arsenic (As) and lead (Pb) content, and the levels were compared with World Health Organization (WHO) specified maximum contaminant level (MCL) 26 Jul 2007 - Developed Environmental Technologies – Case Studies In order to identify five good practice examples more than 80 suitable authorities, relevant Alstom LHB GmbH and its German site Alstom LHB in Salzgitter offers .
From the results obtained, about 75% of biota samples analysed contained As and Pb in concentrations above MCL. The subject of health concern is the increasing concentration of As in Modinagar and Meerut residential area.
The effluents from industries, pesticides used in agriculture land and improper waste management are the reasons responsible for heavy metal toxicity in this belt. The deep bore water samples of Muradnagar, Modinagar, Meerut and Mawana showed high concentrations of As.
Magh Mela (Mela) is a mass gathering festival of Hindus and held on the banks of the confluence (SANGAM) of the three holy rivers, Ganga, Yamuna and Saraswati in Allahabad (India). This study deals with the analysis of solid waste management (SWM) systems in slum areas near the confluence before, during and after the Mela. Surveys were conducted before, after and during the Mela through the questionnaire comprising of physical/chemical, biological/ecological, social/cultural and economical/operational aspects.
The responses were analysed with rapid impact assessment matrix (RIAM) to quantify the intangible effects on the environmental score (ES). Environmental performance index (EPI) was computed for all the three phases to intelligibly ascertain the efficacy of the systems/methodologies involved in SWM system.
The SWM system did show remarkable improvements during the Mela compared to the other phases. In this paper, the fluoride removal efficiency of the two coagulants was compared in batch and continuous mode.
The optimum dosage for PACl was 438–2,410 ppm and 275–1,510 ppm for alum for treating fluoride concentrations of 2–10 ppm. The results showed that PACl was equally effective in bringing the fluoride level within the acceptable limit (1.
5 ppm) in water with half lime dosage, compared to alum. Residual fluoride in dissolved form was found to be 0.
It was also observed that residual aluminium decreases from 0. 34 (PACl) for 4 ppm of initial fluoride concentration. After subsequent microfiltration, residual Al was found to be 0.
From the results, it can be stated that the residual turbidity and TDS for alum, as compared to PACl.
Thus, switching the process to continuous mode using PACl coagulant with a sequential microfiltration, could meet quality criteria for drinking water 2017 ITA Environmental Technologies Top M arkets Report. 1 COUNTRY CASE STUDIES. China . Remediate contaminated sites;. 6. Design, develop and .
In most developing countries, the disposal and treatment of solid waste in urban areas has proved to be a problem for the social acceptance of local residents and long-term sustainable development. This study proposes a multi-objective optimisation methodology to investigate sustainable network designs for solid waste management system.
A case of Pathum Thani province, Thailand, is used to illustrate the application of the methodology. The social impact, defined as the number of people affected by the unpleasant sanitary conditions of nearby solid waste management facilities, is estimated by using GIS tools.
The sustainability performances are normalised to a satisfaction scale, allowing decision makers to select network design solutions based on their sustainability target preferences. The results suggest that the facility location can significantly alter the sustainability performances, and it is shown that the locations of waste management facilities can be arranged to simultaneously improve all of the aspects of sustainability.
Nigeria still considers waste electrical and electronic equipment (WEEE) problem as more of socio-economic benefits rather than long-term human and environmental impacts. The study assessed the socio-economic factors affecting the trend of WEEE generation and handling in South Eastern Nigeria.
The research concept identified key strategic aspects relative to socio-economic assessment of WEEE management. It used investigative approach through questionnaire administration.
Twenty local government areas were purposively selected from five mutually exclusive strata. Data from 201 respondents were analysed using multiple linear regression and descriptive statistics.
Results revealed that monetary provisions and public participation does not have significant relationship with WEEE generation and collection. The study revealed that the factors determined as affecting the trend of WEEE generation and collection cut across cheaper pricing of WEEE, availability of WEEE, quality/superiority of E.
L EEE to newer ones, durability of device, low income consumers and the accessibility of end-users to WEEE.
Antibiotic resistance is currently one of the most serious medical and environmental problems. In this study, the level of tetracycline resistant-gene contamination of the manures of different size farms that provide meat for Kazan (Russia) was investigated.
A polymerase chain reaction (PCR) with specific primers for tet(A), tet(B), tet(C), tet(E), tet(M), tet(O), tet(S), tet(X) and subsequent electrophoresis was used to reveal the level of pollution. It was found that all 16 samples investigated contained at least one resistant gene.
The genes tet(M), tet(O), tet(S), responsible for encoding ribosome protection, and tet(X), which encodes antibiotic decomposition, were the most abundant. No correlation was found between the farm size and the level of antibiotic resistant-gene pollution.
Accumulation of high concentrations of heavy metals in soil and environment affects both humans and microorganisms. Heavy metals get accumulated within the tissues of the organism and at various levels of the ecological chain; leads to decrease in the biomass and biological diversity by affecting the growth, morphology, and activity of the organism.
Removal of hazardous heavy metals and radionuclide-contamination through biological means is of current importance. Bioremediation using microorganisms is considered as safe and more efficient.
Actinobacteria, the most important groups of microbes, are responsible for degradation and transformation of organic and metal substrates and also possess significant bioremediation potential. It can degrade high doses of pesticides, chemical complexes, and heavy metals.
Actinomycetes utilise toxins as carbon sources and in turn synthesise commercially viable antibiotics, enzymes and proteins. In this review, the efficacy of actinomycetes in bioremediation of heavy metals such as copper, chromium, mercury, lead, zinc, and cadmium was discussed.
Application of municipal sewage sludge in agriculture is one of the best options for its safe disposal as it provides an opportunity to recycle plant essential nutrients (N, P, secondary nutrients and micronutrients) and improves soil physical, chemical and biological properties due to high organic matter content. Yield and productivity of a wide range of crops has been improved due to soil application of sewage sludge than that of well-fertilised control.
Depending upon the origin, sewage sludge often contains very high amount of potentially toxic heavy metals and as such their excessive use for a longer period increases metal bioavailability in soil and ultimately causes food chain contamination.
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Remediation through aquatic macrophytes treatment system for the removal of noxious contaminants from wastewater is an emerging environmental protection technique.
The dried and acid-alkali treated bulbs of water hyacinth (WHB) having high porosity and O2-filled functional groups were utilised to treat Pb(II) from industrial wastewater The Energy and Environmental Technology and Economics MSc will help you Know the economics governing consumer use and purchase of energy Fees in each subsequent year of study (where applicable) will be subject to checks and approval for further details please visit the City Finance website. Back to top .
Characterisation of WHB with FESEM, XRD and FTIR exhibited the presence of several carboxyls, hydroxyl, ketonic, aldehydes and other O2-filled functional groups showing WHB adsorption with highest monolayer capacity of (Qm) 38. WHB adsorption directed towards the pseudo-second order kinetics and Langmuir isotherm mechanism. The study also emphasised effective regeneration of WHB using HNO3, NaOH and vacuum dry.
The bio-sorption mechanism was observed to be endothermic spontaneous reaction process, with G decreased from -0. With optimised and controlled process conditions, only 5.
0 g L⁻ of WHB bio-sorbent could significantly treat about 85. 3% of 100 mg L⁻ of Pb(II) within 120 minutes at pH 7.
Also a comparative optimisation study of ANN and RSM were used to predict the WHB bio-sorption bioprocess.
Therefore, WHB have efficient potential to be commercially applicable as an environmental-friendly and economical bio-sorbent for treatment of Pb(II) from solutions and effluent from paint industry. Plants displaying heavy metal hyper-accumulation and high biomass could be used in phytoextraction.
The present study utilises photosynthetic acclimation rates and morphological measurements to gauge cadmium toxicity in radish plants raised on nutrient solutions containing 0, 5, 10 and 20 M CdCl2. Growth rates displayed a dose-dependent decline with cadmium exposure.
Photosynthetic acclimation was significantly reduced compared to controls in all cadmium treatments. Inductively coupled plasma mass spectrometry was used to determine cadmium accumulation.
In both the roots and shoots of the plant, cadmium levels were significantly higher than the controls in 10 and 20 M treatments. Significantly more cadmium was distributed into the roots compared to shoots.
A moderate tolerance for and reasonable accumulation of cadmium makes the radish a candidate for phytoremediation in marginally contaminated environments. Furthermore, the sensitivity of photosynthetic acclimation rates to cadmium exposure serves as a potential bioindicator of cadmium contamination.
Work life balance has turned into an imperative issue in the 21st century. Work and family life are two sides of an indistinguishable coin from both are interconnected and meddle with each other.
Expanded work requests meddle with family life and then again, family requests meddle with the work life of employees. In this way, clashes happen, which adversely influence an employee's performance at work and also at home.
Taking a gander at the pattern, organisations have progressively begun to take a dynamic enthusiasm for executing rehearses that empower employees to adapt to the work life balance issues. The review endeavoured to investigate the work life balance practices of chosen public sector undertaking.
The finding proposed that public sector undertaking in India have understood that work life balance practices are pivotal for organisational performance. To improve poultry waste management, the feasibility of enabling efficient anaerobic digestion of poultry manure through reduction of ammonia accumulation is examined.
This study employs struvite precipitation to control ammonia accumulation, and focuses on the efficacy of ammonia removal under neutral reaction conditions (pH = 7) The international dimension is emphasised in order to overcome cultural and national Website, International Journal of Environmental Technology and We comparatively analyse three regional case studies in Denmark and show how to another and enable policy-makers to observe good practices and test them at .
Case studies - 4r group
Magnesium chloride (MgCl2·6H2O) and monopotassium phosphate (KH2PO4) are shown to be the most efficient combination of additives for total ammoniacal nitrogen (TAN) reduction of poultry manure leachate under neutral reaction conditions (pH = 7), demonstrating a TAN reduction of 90. Modification of molar ratios (NH4:Mg:PO4) evidenced no significant benefit with regard to TAN reduction. However, increasing the fraction of supplementary magnesium resulted in a statistically significant (p< 0.
05) decrease in phosphate concentration within the leachate. This study demonstrates the advantages of struvite precipitation, as a method of ammonia control, to improve anaerobic digestion and hence management of poultry manure.
Although an effective means of TAN control, struvite precipitation from poultry manure is an ineffective means of obtaining pure struvite due to the formation of co-precipitates. The adaptability of in situ remediation techniques for low soluble fractions in petroleum products such as polycyclic aromatic hydrocarbon (PAH) is generally constrained due to their limited bio-availability owing to hydrophobicity.
In the present study, a numerical model is developed to evaluate the effect of unsaturated hydraulic properties, equilibrium chemical partitioning as well as coupled reactions on the fate and transport of a typical PAH (phenanthrene) originating from a surface spill. Simulation of surfactant enhanced remediation using a non-ionic surfactant (Triton N-101) resulted in significant modifications in unsaturated hydraulic properties.
The presence of natural organic matter (adsorption partitioning coefficient of 8. 97 × 10-4 L/mg) as well as viable bacterial consortium (specific growth rate >3.
06 × 10-7 /sec) in the soil is found to be favouring the biodegradation in order to limit the reach of phenanthrene up to a depth of 200 cm. The results suggest that selection of surfactant type and dosage affected the extent of solubility enhancement of phenanthrene (from 1.
5 mg/L); however, ultimately the typical bio-geochemical features of the subsurface seemed to control the success of remediation.
This article aims to contribute to the limited literature dealing with the disturbance caused to local residents by malfunctioning sewer networks. It explores the preferences of residents in the Eurom tropole de Strasbourg (France), with the aim of redefining priorities for sewer network asset management.
Valuation is performed using the contingent ranking method and results are compared to a recoded choice experiment. Comparison of results from both methods reveals that price influences the ranking of the different alternatives given to the respondents, but does not influence respondents’ preferred alternative.
In other words, the price of the alternatives is only considered by respondents later in the decision process. For residents, the trade-offs between the potential disruption caused by a network malfunction favour the reduction of the risk of flooding (either in terms of their frequency or attained water levels).
These findings highlight the challenges of asset management. In the present work, heavy metal contamination of water and soil in western Uttar Pradesh terrain, India was assessed.
About 16 boreholes and tap water samples and ten soil samples were studied using atomic absorption spectrophotometer (AAS) for arsenic (As) and lead (Pb) content, and the levels were compared with World Health Organization (WHO) specified maximum contaminant level (MCL). From the results obtained, about 75% of biota samples analysed contained As and Pb in concentrations above MCL.
The subject of health concern is the increasing concentration of As in Modinagar and Meerut residential area. The effluents from industries, pesticides used in agriculture land and improper waste management are the reasons responsible for heavy metal toxicity in this belt.
The deep bore water samples of Muradnagar, Modinagar, Meerut and Mawana showed high concentrations of As. With the increasing environmental problems, companies have started realising their moral and ethical duties and gradually adopting sustainable business practices.
The challenging task of communicating with the consumers with varied attitude towards the environment can be undertaken by understanding the factors influencing environmental attitude.
This paper aims at identifying the antecedents of consumer environmental attitude (CEA) and studying its relationship with the green purchase intention (GPI) and to find out the moderating effect of perceived product necessity on the relationship of CEA and GPI performance data at every sales call, and we direct potential customers to EPA'sWeb site so they The technical performance data is good, but it's ETV's independent new revenue streams for our customers and big benefits to the environment. appears to be a factor in customers' decision to purchase the technology..
A conceptual model has been proposed and tested using confirmatory factor analysis and SEM. From a dataset of 729 Indian consumers, it has been found that four antecedents; environmental knowledge, environmental concern, interpersonal influence and collectivism are positively related to CEA which is further positively related to GPI.
It has also been found that perceived product necessity does not moderate the relationship between CEA and GPI. The vehicular pollution has increased substantially in recent times.
Indian mega-cities like Delhi which has distinctly been credited with dangerously high vehicular pollution levels. The present study has been undertaken aiming at pollution estimation for different transport corridors of Delhi city with a view to analysing the changing traffic composition trends and its impact on the levels of ambient air pollutants.
From the study, it was found that Ring road (Safdarjung) had the highest concentration of CO and PM10 as 3,066 and 422 g/m while Auchandi Road bore the lowest concentration of the same as 193 and 23 g/m . Maximum values of 363 g/m of NOx at Maa Anandmayi Marg, 542 g/m of PM2.
5 at ISBT Flyover and 42 g/m of SOX at Nizamuddin Bridge were reported in comparison to minimum values as 24 g/m at Pusa Road, 53 g/m at Sansad Marg and 2 g/m at Auchandi Road respectively. Improper treatment and disposal of municipal solid waste (MSW) and continuous increase in waste generation in India has increased greenhouse emissions as well as other pollutant emissions.
In the present study, we analyse greenhouse gas (GHG) emissions from MSW management sector in India. We calculate GHG emissions for different treatment processes and then analyse the GHG emissions for waste management scenarios which reflect recycling, biological treatment and waste-to-energy (WtE).
Our results show that annual GHG (CO2-eq) emissions from urban MSW management in India is ~38 million tonnes/year out of which 94% is from open dumping alone. Increasing recycling to 50% from the current rate of 17.
Similarly increasing biological treatment process, such as composting and anaerobic digestion, of biodegradable waste to 50% could reduce the GHG emissions by 12%.
The response surface Box-Behnken design is used to study the dependence and interactions of particle size, load of fly ash and pressure drop inside the cyclone separator for collection efficiency of fly ash. The maximum collection efficiency of fly ash obtained was 95% in the cyclone separator studied.
The Barth model is used to evaluate the axial and tangential velocities of cyclone separator studied. The static pressure contour plots at different inlet velocities of 41 m/s and 104 m/s at top and bottom horizontal planes of cyclone separator were developed using computational fluid dynamics software Fluent.
The contour regions of axial, radial and tangential velocity fields in the cyclone separator were analysed using Fluent finite volume code for flow analysis inside the cyclone separator for fly ash collection. It was observed that the radial velocity increases rapidly towards the vortex core and the tangential velocity is dependent on the geometrical design of cyclone separator, wall friction and part.
Urban traffic emission is one of the grievous problems faced by people in urban centres of developing countries like India. Inspite of bad air quality, people are forced to live in air-polluted areas of megacities like Delhi.
The present study is an effort to analyse the air quality of some selected areas along major urban transport corridors in Delhi. On the basis of land-use pattern, five locations, i.
, Rithala, Pitampura, Kashmiri Gate, Jhilmil, and Panchsheel Enclave were selected to conduct the research study.
The study included the monitoring of CO, NOx, SO2 and PM at all the identified locations for 12 hrs (8:00 to 20:00).
The monitored data of each location was used to estimate the composite air quality index (CAQI) The Green Purchasing Network, Malaysia was greatly honored to be given the task by UN. Environment to prepare a compilation of GPP case studies from four Republic of Korea: Ms Hyunju Lee, Associate Researcher, Korea Environmental Industry & Technology Build and maintain good relationships with suppliers..
The highest value of CAQI was observed at Jhilmil (140) followed by Kashmiri Gate (127), Pitampura (109), Rithala (104) and Panchsheel Encalve (103).
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The ammonia nitrogen in aqueous solution can contribute to the eutrophication of water bodies, depletion of dissolved oxygen and toxicity to fish and other aquatic organisms. The removal of ammonia nitrogen in aqueous solution was carried out with many kinds of methods.
In this research, the potential and effectiveness of the water treatment sludge was studied as the alternative adsorbents for the removal of ammonia nitrogen in aqueous solution. The water treatment sludge was activated by acid solution.
Then, the effects of temperature, contact time and initial ammonia nitrogen concentration on ammonia nitrogen adsorption by the acid activated water treatment sludge were investigated. The results showed that the acid activated water treatment sludge contains porous structures and high surface area.
The equilibrium data fitted with the Langmuir isotherm. The adsorption data fitted the pseudo-second-order model much better with R2 greater than the pseudo-first-order model.
The ammonia nitrogen in aqueous solution can contribute to the eutrophication of water bodies, depletion of dissolved oxygen and toxicity to fish and other aquatic organisms.
The removal of ammonia nitrogen in aqueous solution was carried out with many kinds of methods. In this research, the potential and effectiveness of the water treatment sludge was studied as the alternative adsorbents for the removal of ammonia nitrogen in aqueous solution.
The water treatment sludge was activated by acid solution. Then, the effects of temperature, contact time and initial ammonia nitrogen concentration on ammonia nitrogen adsorption by the acid activated water treatment sludge were investigated.
The results showed that the acid activated water treatment sludge contains porous structures and high surface area. The equilibrium data fitted with the Langmuir isotherm.
The adsorption data fitted the pseudo-second-order model much better with R2 greater than the pseudo-first-order model. Bangalore is one of India's fastest growing metropolises and, although benefiting economically due to its fast development, has a rapidly deteriorating environment. This paper provides a critical analysis of the air pollution trend in the city over the period 2006-2013 at six specific locations where measurements have been consistently recorded.
It also discusses the potential health implications pertaining to exceeding levels of pollutants where these are applicable. In order to attain informed decisions on the protection of the health of populations from elevated levels of air pollution, an understanding of spatial-temporal variance of air pollutant patterns is necessary.
The study highlights the fact that Bangalore and other similar developing cities do not have an adequate number of fixed monitoring stations that could provide a complete coverage of the air pollution levels for the entire city.
It is suggested that this can be overcome by using geospatial interpolation techniques that provide a complete coverage of the levels of pollutants, as well as assist in mapping health characteristics of the population, in order to reach evidencebased decisions and target effective interventions Equal consideration to the social, environmental and economic implications of getting there. If all three references and case studies. Summary. 1 Forum for This involves buying paper, computers, communications technologies such as phones and good place to start is the UK government's website (www.sustainable-..
The potential of a Brazilian natural bentonite to remove Rhodamine B (RhB) dye from aqueous solutions was evaluated.
Costs and benefits of green public procurement in europe - european
The adsorption of RhB onto bentonite was evaluated in batch system. 5), kinetic curves and equilibrium isotherms (initial dye concentrations from 100 to 600 mg L-1) were studied at 25°C and 250 rpm.
It was found that the Brazilian bentonite presented a mesoporous structure with surface area of 14. The adsorption capacity remained practically constant from pH 2. The Elovich model was adequate to represent the adsorption kinetic curves.
Langmuir and Freundlich models were suitable to represent the adsorption isotherm. It was demonstrated that the Brazilian bentonite can be utilised as a promising adsorbent to remove RhB from aqueous solutions. Several epidemiological studies have shown a relation between exposure to air pollutants and human adverse health effects.
Consequently, the quality of air inside homes, offices, schools and other private and public buildings is an essential determinant for health and well-being, considering that people spend the majority of their time indoors. Over the last 30 years, numerous studies indicated that there are some common health symptoms associated with office workers, which are less apparent when they leave the building.
The present study was conducted in order to evaluate the indoor air quality (IAQ) in office buildings. The indoor pollutants carbon dioxide (CO2), carbon monoxide (CO), particulate matter with an aerodynamic diameter< 10 m (PM10), volatile organic compounds (VOCs), formaldehyde (H2CO), ozone (O3), fungi and bacteria were assessed in seven offices located in an urban environment, as well as temperature, relative humidity and air velocity.
Results showed that all the measured pollutants, .