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Pollution Control (pollution + control)
Kinds of Pollution Control Selected AbstractsA MODEL TO ENHANCE WETLAND DESIGN AND OPTIMIZE NONPOINT SOURCE POLLUTION CONTROL,JOURNAL OF THE AMERICAN WATER RESOURCES ASSOCIATION, Issue 1 2002Erik R. Lee ABSTRACT: A dynamic, compartmental, simulation model (WETLAND) was developed for the design and evaluation of constructed wetlands to optimize nonpoint source (NPS) pollution control. The model simulates the hydrologic, nitrogen, carbon, dissolved oxygen (DO), bacteria, vegetative, phosphorous, and sediment cycles of a wetland system. Written in Fortran 77, the WETLAND models both free-water surface (FWS) and subsurface flow (SSF) wetlands, and is designed in a modular manner that gives the user the flexibility to decide which cycles and processes to model. WETLAND differs from many existing wetland models in that the interactions between the different nutrient cycles are modeled, minimizing the number of assumptions concerning wetland processes. It also directly links microbial growth and death to the consumption and transformations of nutrients in the wetland system. The WETLAND model is intended to be utilized with an existing NPS hydro-logic simulation model, such as ANSWERS or BASINS, but also may be used in situations where measured input data to the wetland are available. The model was calibrated and validated using limited data from a FWS wetland located at Benton, Kentucky. The WETLAND predictions were not statistically different from measured values for of five-day biochemical oxygen demand (BOD5), suspended sediment, nitrogen, and phosphorous. Effluent DO predictions were not always consistent with measured concentrations. A sensitivity analysis indicated the most significant input parameters to the model were those that directly affected bacterial growth and DO uptake and movement. The model was used to design a hypothetical constructed wetland in a subwatershed of the Nomini Creek watershed, located in Virginia. Two-year simulations were completed for five separate wetland designs. Predicted percent reductions in BOD5 (4 to 45 percent), total suspended solids (85 to 100 percent), total nitrogen (42 to 56 percent), and total phosphorous (38 to 57 percent) were similar to levels reported by previous research. [source] TECHNOLOGY INVESTMENT IN POLLUTION CONTROL IN SUB-SAHARAN AFRICA: EVIDENCE FROM NIGERIAN MANUFACTURINGTHE DEVELOPING ECONOMIES, Issue 4 2001John Olatunji ADEOTI First page of article [source] The Economics of Nonpoint Pollution ControlJOURNAL OF ECONOMIC SURVEYS, Issue 3 2001James S. Shortle A timely literature on the design of economic incentives for nonpoint pollution control has been emerging. We describe the nonpoint pollution control problem, some of the peculiar challenges it poses for policy design, and the policy-related contributions of the theoretical and empirical literature on the economics of nonpoint pollution. [source] Consequences of Decentralization: Environmental Impact Assessment and Water Pollution Control in IndonesiaLAW & POLICY, Issue 1 2010ADRIAAN BEDNER After having been one of the most centralized states in the world for more than thirty years, in 2001 Indonesia introduced a sweeping program of decentralization with important consequences for the management of the industrial sector. This article explores whether the decentralization process has led to substantial changes in Environmental Impact Assessment (EIA) and enforcement of water pollution law. Its main findings are that the general division of authority in both fields has become less fragmented and that differences between districts have increased, but, in practice, not so much has changed as one would have expected. For EIA, "horizontal" disputes between sectoral agencies have been supplanted by "vertical" disputes between different levels of government. Monitoring and sanctioning of industrial water pollution have mainly continued within the scheme of the provincial program started under Soeharto's centralized regime, with still few initiatives at the district level. If any, such initiatives are usually driven by public complaints. On the other hand, there are indications that in the longer run the institutional changes may have more significant effects on EIA and enforcement practice. For EIA, these seem to be negative; for enforcement of water pollution regulation this depends much on the situation within a district or a province. [source] Implementing chemicals policy: leaders or laggards?BUSINESS STRATEGY AND THE ENVIRONMENT, Issue 6 2004J. P. Richards Prioritization of regulatory agency resources remains a key issue in the management of industrial pollution. This is likely to become increasingly important as a new EC chemicals policy is implemented and measures are introduced to achieve the OSPAR zero emissions target. The Environment Agency (England and Wales) has updated the Operator Pollution and Risk Assessment (OPRA) scheme, but it still includes no quantitative measurement of operator attitudes towards environmental regulation. This is important because regulated firms' attitudes are known to affect regulatory behaviour. This study explores the attitudes of environmental managers from 142 chemical sector companies regulated under Integrated Pollution Control. Analysis of responses from a questionnaire survey revealed a number of regulatory typologies. A ,conservative' cluster exhibited satisfaction with the current regulatory system and rejected change. ,Progressive' cluster members recognized shortcomings and welcomed change. This methodology could be used alongside OPRA to support decisions necessary to prioritize regulatory resources. Copyright © 2004 John Wiley & Sons, Ltd and ERP Environment. [source] Book Review: Catalytic Air Pollution Control.CHEMPHYSCHEM, Issue 11 2003By Ronald M. Heck, Robert J. Farrauto No abstract is available for this article. [source] Effect of pollution control on corporate financial performance in a transition economyENVIRONMENTAL POLICY AND GOVERNANCE, Issue 4 2007Dietrich Earnhart Abstract This study analyzes the effect of pollution control on corporate financial performance in a transition economy. In particular, it assesses whether better pollution control, as measured by lower air pollutant emissions, improves or undermines financial success, as captured by accounting-based measures of financial performance, e.g. profitability. For this assessment, this study analyzes the effect of air pollution control using a panel of Czech firms for the years 1996,1998. The analytical results indicate that better pollution control neither improves nor undermines financial success. These results provide no support for the hypothesis that pollution prevention, generated by improved production processes, led to lower costs, and thus, greater profitability. Copyright © 2007 John Wiley & Sons, Ltd and ERP Environment. [source] Bioprocesses for air pollution controlJOURNAL OF CHEMICAL TECHNOLOGY & BIOTECHNOLOGY, Issue 10 2009Christian Kennes Abstract Bioprocesses have been developed as relatively recent alternatives to conventional, non-biological technologies, for waste gas treatment and air pollution control in general. This paper reviews major biodegradation processes relevant in this field as well as both accepted and major innovative bioreactor configurations studied or used nowadays for the treatment of polluted air, i.e. biofilters, one- and two-liquid phase biotrickling filters, bioscrubbers, membrane bioreactors, rotating biodiscs and biodrums, one- and two-liquid phase suspended growth bioreactors, as well as hybrid reactor configurations. Some of these bioreactors are being used at full-scale for solving air pollution problems, while others are still at the research and development stage at laboratory- or pilot-scale. Copyright © 2009 Society of Chemical Industry [source] The Economics of Nonpoint Pollution ControlJOURNAL OF ECONOMIC SURVEYS, Issue 3 2001James S. Shortle A timely literature on the design of economic incentives for nonpoint pollution control has been emerging. We describe the nonpoint pollution control problem, some of the peculiar challenges it poses for policy design, and the policy-related contributions of the theoretical and empirical literature on the economics of nonpoint pollution. [source] The status of fish conservation in South African estuariesJOURNAL OF FISH BIOLOGY, Issue 9 2010A. K. Whitfield Estuary-dependent fish species are defined as those taxa whose populations would be adversely affected by the loss of estuarine habitats. Of the 155 species regularly recorded in South African estuaries, only 32 (21%) are completely dependent on these systems, but this figure increases to 103 species (66%) if partially dependent taxa are included in the analysis. The conservation of fishes in estuaries on the subcontinent is threatened by a number of factors, including habitat degradation, disruption of essential ecological processes, hydrological manipulations, environmental pollution, overexploitation due to fishing activities and, more recently, climate change and the effects of introduced aquatic animals. Although major threats to fishes are usually linked to environmental degradation, there is increasing evidence that the stocks of certain fish species are overexploited or collapsed. Fish conservation and fisheries management does not depend on the implementation of a single action, but rather the co-ordination of a detailed plan, often in a multidisciplinary context. Some examples of innovative means of contributing to estuarine fish conservation in a South African context include the determination and implementation of the ecological freshwater requirements for estuaries, the zoning of estuaries for different uses and the recognition that the maintenance of ecological processes are vital to aquatic ecosystem health. Apart from the designation of protected areas, the main direct means of conserving fish species and stocks include habitat conservation, controls over fishing methods, effort, efficiency and seasonality, pollution control and the prevention of artificial manipulation of estuary mouths. Since becoming a democracy in 1994, environmental legislation, policy and institutional arrangements in South Africa have undergone some major changes, which, if fully implemented, will be very positive for fish conservation in estuaries on the subcontinent. [source] GIS-Based Predictive Models of Hillslope Runoff Generation Processes,JOURNAL OF THE AMERICAN WATER RESOURCES ASSOCIATION, Issue 4 2009Mansour D. Leh Abstract:, Successful nonpoint source pollution control using best management practice placement is a complex process that requires in-depth knowledge of the locations of runoff source areas in a watershed. Currently, very few simulation tools are capable of identifying critical runoff source areas on hillslopes and those available are not directly applicable under all runoff conditions. In this paper, a comparison of two geographic information system (GIS)-based approaches: a topographic index model and a likelihood indicator model is presented, in predicting likely locations of saturation excess and infiltration excess runoff source areas in a hillslope of the Savoy Experimental Watershed located in northwest Arkansas. Based on intensive data collected from a two-year field study, the spatial distributions of hydrologic variables were processed using GIS software to develop the models. The likelihood indicator model was used to produce probability surfaces that indicated the likelihood of location of both saturation and infiltration excess runoff mechanisms on the hillslope. Overall accuracies of the likelihood indicator model predictions varied between 81 and 87% for the infiltration excess and saturation excess runoff locations respectively. On the basis of accuracy of prediction, the likelihood indicator models were found to be superior (accuracy 81-87%) to the predications made by the topographic index model (accuracy 69.5%). By combining statistics with GIS, runoff source areas on a hillslope can be identified by incorporating easily determined hydrologic measurements (such as bulk density, porosity, slope, depth to bed rock, depth to water table) and could serve as a watershed management tool for identifying critical runoff source areas in locations where the topographic index or other similar methods do not provide reliable results. [source] A MODEL TO ENHANCE WETLAND DESIGN AND OPTIMIZE NONPOINT SOURCE POLLUTION CONTROL,JOURNAL OF THE AMERICAN WATER RESOURCES ASSOCIATION, Issue 1 2002Erik R. Lee ABSTRACT: A dynamic, compartmental, simulation model (WETLAND) was developed for the design and evaluation of constructed wetlands to optimize nonpoint source (NPS) pollution control. The model simulates the hydrologic, nitrogen, carbon, dissolved oxygen (DO), bacteria, vegetative, phosphorous, and sediment cycles of a wetland system. Written in Fortran 77, the WETLAND models both free-water surface (FWS) and subsurface flow (SSF) wetlands, and is designed in a modular manner that gives the user the flexibility to decide which cycles and processes to model. WETLAND differs from many existing wetland models in that the interactions between the different nutrient cycles are modeled, minimizing the number of assumptions concerning wetland processes. It also directly links microbial growth and death to the consumption and transformations of nutrients in the wetland system. The WETLAND model is intended to be utilized with an existing NPS hydro-logic simulation model, such as ANSWERS or BASINS, but also may be used in situations where measured input data to the wetland are available. The model was calibrated and validated using limited data from a FWS wetland located at Benton, Kentucky. The WETLAND predictions were not statistically different from measured values for of five-day biochemical oxygen demand (BOD5), suspended sediment, nitrogen, and phosphorous. Effluent DO predictions were not always consistent with measured concentrations. A sensitivity analysis indicated the most significant input parameters to the model were those that directly affected bacterial growth and DO uptake and movement. The model was used to design a hypothetical constructed wetland in a subwatershed of the Nomini Creek watershed, located in Virginia. Two-year simulations were completed for five separate wetland designs. Predicted percent reductions in BOD5 (4 to 45 percent), total suspended solids (85 to 100 percent), total nitrogen (42 to 56 percent), and total phosphorous (38 to 57 percent) were similar to levels reported by previous research. [source] Conservation of gullies in susceptible riparian areas of alluvial soil regionsLAND DEGRADATION AND DEVELOPMENT, Issue 3 2002R. C. Yadav Abstract The problem of gully erosion is very severe in the riparian areas of the alluvial deep soil region in India. Research and development have progressed in response to the change in social needs. The earlier strategy of maintenance of law and order has changed to one of reclamation and restoration of the productive capacity of riparian areas. Watershed management in the ravines has been adopted for development of food security, eco-restoration and pollution control. Case studies on the watershed management in watersheds projects initiated in the mid-1980s revealed the scope for bringing increased prosperity through crop diversification and eco-restoration. In consideration of the erosion process, new concepts of management zones and improved conservation and reclamation practices have been developed. The sociological factors have been rationally analysed, as they applied to watershed management in the ravines. A new paradigm of watershed management by group action is necessary in the future. Since the ways of combating the ravine problem and enhancing the productivity of ravine-degraded lands were made on rational process-based approach, there is scope for it to be implemented in other countries with similar land and socio-economic situations. Copyright © 2002 John Wiley & Sons, Ltd. [source] Integrated river basin management in England and Wales: a policy perspectiveAQUATIC CONSERVATION: MARINE AND FRESHWATER ECOSYSTEMS, Issue 4 2002G. Mance Abstract 1.There is now an irresistible momentum for a truly integrated and strategic approach to river basin management. As a consequence, the framework within which individual organizations can carry out their roles and responsibilities in a co-ordinated and sustainable way can be determined. 2.Extreme events such as floods and droughts have severe social and economic consequences. ,Traditional' engineered responses, which take little account of fluvial processes and ecosystem functioning, often exacerbate these problems and can have severe adverse consequences on the environment. 3.Bringing together a range of scientific, technical and engineering disciplines to address catchment management has many advantages. Identifying and implementing innovative solutions that benefit local communities and the environment is the only sustainable way forward for river management. 4.Public understanding of risk assessment and management is vital to the success of an integrated approach. So too is a strategic dimension to inform the town and country planning system and major investment decisions by major utilities and public bodies responsible for water supply, pollution control and flood management. 5.There are major challenges ahead for public utilities, agencies and professional bodies in terms of attracting, retaining and blending together skilled scientific, engineering and technical specialists. These skills need to be complemented by the ability to convey sophisticated information in readily understood language. Copyright © 2002 John Wiley & Sons, Ltd. [source] Reforming diesel-fuel distillates with membrane reactorsASIA-PACIFIC JOURNAL OF CHEMICAL ENGINEERING, Issue 1 2010Michael V. Mundschau Abstract A porous-membrane reactor is used to produce H2 and CO by dry partial oxidation of volatile hydrocarbons distilled from diesel fuel. To eliminate deposition of thermodynamically and kinetically favored carbon onto reactor walls as the fuel is heated, cool air is brought into reactors through porous walls of refractory, zirconia-based ceramic. Flow of air through reactor walls suppresses alkyl-radical polymerization that otherwise leads to formation of tar and soot in the reformer heating zone. Diesel fuel is distilled just below 200 °C to avoid cracking of long-chain n -alkanes. The volatile distillates enter the reformer in the vapor phase, eliminating need for complex liquid-fuel injectors and mixers. Volatile distillates are relatively easily reformed, eliminating soot and most naphthalene in the exhaust, converting 88 mole% of carbon in the distillate into CO, 7% into CH4, and 5% into CO2. Approximately 75 mole% of the hydrogen is converted into H2, 13% into CH4, and the remainder into H2O. Synthesis gas produced from diesel fuel distillates could fuel solid-oxide fuel cells or regenerate NOx traps used in pollution control. Copyright © 2009 Curtin University of Technology and John Wiley & Sons, Ltd. [source] Pathways to industrial environmental improvement in the East Asian newly industrializing economiesBUSINESS STRATEGY AND THE ENVIRONMENT, Issue 2 2002Michael T. Rock After the adoption of ,grow first clean up later' environmental strategies, governments in the East Asian newly industrializing economies (NIEs) turned to environmental ,clean-up' by enacting landmark environmental legislation, creating command and control environmental agencies and promulgating tough air and water emissions standards. Available evidence suggests there is wide variability in the performance of these new environmental regulatory agencies. Most attribute this variability to differences in ,political will'. However, why have some governments among the East Asian NIEs been able to muster the ,political will' to impose duties on industrial polluters while others have not? This paper answers this question by summarizing a larger study (Rock, 2002) which examines the ,politics of industrial pollution' control in six East Asian NIEs. Each case study is based on extensive interviews, the collection of data on the effectiveness of pollution management policies, and the integration of both with the political economy literature on each economy. Copyright © 2002 John Wiley & Sons, Ltd. and ERP Environment [source] | ||||||||||||||||