Chemical water & wastewater

Xem 1-20 trên 38 kết quả Chemical water & wastewater
  • This study was conducted within RAND’s Public Safety and Justice program. RAND Public Safety and Justice conducts research and analysis that helps inform policymakers and communities in the areas of public safety, including law enforcement, terrorism preparedness, immigration, emergency response and management, and natural disasters; criminal justice, including sentencing and corrections policy, firearms, and community violence; and drug policy, which focuses on problems related to illegal drugs and substance abuse....

    pdf0p xuan2013 25-01-2013 16 1   Download

  • Before any water or wastewater can be treated, it must first be characterized. Thus, characterization needs to be addressed. Waters and wastewaters may be characterized according to their quantities and according to their constituent physical, chemical, and microbiological characteristics. Therefore, Part I is composed of two chapters: “Quantity of Water and Wastewater,” and “Constituents of Water and Wastewater.”

    pdf722p crazy_sms 10-05-2012 86 44   Download

  • The detection of pharmaceutical residues remained elusive until instruments such as liquid chromatography and mass spectrometry became commonplace in environmental laboratories. The documentation of the occurrence of pharmaceutical residues and endocrine disrupting chemicals in water resources has raused questions about their long-term effects in the ecosystem and their potential effects on human health.

    pdf382p 951628473 04-05-2012 74 35   Download

  • Chemical reactions (abiotic reactions) are “classical” chemical reactions that are not mediated by bacteria. They may include reaction processes such as precipitation, hydrolysis, complexation, elimination, substitution etc. that transform chemicals to other chemicals and potentially alter their phase/state (solid, liquid, gas, dissolved). Precipitation is the removal of ions from solution by the formation of insoluble compounds, i.e. a solid-phase precipitate. Hydrolysis is a process of chemical reaction by the addition of water.

    pdf208p cao_can 29-12-2012 34 13   Download

  • The importance of cyanobacterial toxins in drinking water sources has been highlighted by the adoption of a provisional drinking water “Guideline Value” for microcystin- LR, one of the most abundant toxins, by the World Health Organization (WHO). A number of nations have now legislated a guideline for microcystins into their drinking water regulations, with the consequent need for monitoring and analytical techniques. The Chemical Safety Committee of the WHO also has under consideration a Guideline Value for cylindrospermopsin, the other most damaging cyanobacterial toxin....

    pdf263p crazy_sms 10-05-2012 38 10   Download

  • Sorption is a process by which chemicals or organisms become attached to soils and/or the geologic rock material (aquifer solids) and removed from the water. Often the sorption process is reversible and solutes desorb and hence dissolved-solute plumes are retarded, rather than solutes being permanently retained by the solids. Cation exchange is the interchange between cations in solution and cations on the surfaces of clay particles or organic colloids. Filtration is a process that affects particulate contaminants (e.g.

    pdf93p cao_can 29-12-2012 16 6   Download

  • World experts are brought together to contribute to each volume, presenting a comprehensive blend of fundamental principles and applied technologies for each topic. Current practices and the state-of-the-art are reviewed, new developments in analytics, science and biotechnology are presented and, crucially, the theme of each volume is presented in relation to adjacent scientific, social and economic fields to provide solutions from a truly integrated perspective.

    pdf230p chatraqn 13-12-2012 17 4   Download

  • Tham khảo sách 'environmental technology series-part 2: approaches for consideration in formualating environmental control strategies', khoa học tự nhiên, công nghệ môi trường phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

    pdf263p chatraqn 13-12-2012 21 4   Download

  • Electrochemistry has been used extensively in the past three decades to determine the chemical composition of environmental samples from the water column, sediments, soils, biofilms, and microbial mats.

    pdf0p taurus23 26-09-2012 37 15   Download

  • Water-quality engineering is a specialty area in environmental engineering that includes the subspecialties of water treatment, wastewater treatment, and water-quality control in natural systems. This textbook is intended to encompass the latter subspecialty, and the content of this book constitutes baseline knowledge expected of water-quality engineers and managers.

    pdf628p tiendat_cg 26-09-2013 35 12   Download

  • Textile industry is a leading industry for most countries, such as China, Singapore, UK, Bangladesh, Italy, Turkey etc. But, environmental pollution is one of the main results of this industry. Parralel to usage of huge amounts of water ad chemicals, the textile dyeing and finishing industry is one of the major polluters among industrial sectors, in the scope of volume and the chemical composition of the discharged effluent (Pagga & Brown, 1986).

    pdf162p nhatkyvodanh 24-07-2012 31 10   Download

  • Sewage sludge as an uncalled for product of wastewater treatment poses the challenge to society of disposing of it, but at the same time gives us the opportunity of beneficial use by closing the cycle of nutrients: sludge derived from agricultural activity must return to soil if a sustainable and ecologically sound management of these materials is desirable (SEQUI et al. 2000). At present the major ways of disposing of sewage sludges are deposition, landfill and incineration, only part of the sludges are used in agriculture. ...

    pdf30p ut_hai_can 29-12-2012 28 8   Download

  • The internode of solid bamboo has significantly higher ash, 1% NaOH, alcohol- toluene and hot water solubles than the nodes [Mabilangan et al. 2002]. However, differences between the major chemical composition of node and internode fraction of bamboo are small [Scurlock 2000]; neither the number of nodes nor the length of internode segments would be critical to the utilization of bamboo for energy conversion, chemical production, or as a building material. Fujji et al. [1993] investigated the chemistry of the immature culm of a moso- bamboo (Phyllostachys pubescens Mazel).

    pdf224p loixinloi 08-05-2013 20 6   Download

  • There are, actually, no formal Swedish regulations for organic contaminants in sludge. There is an informal agreement between the Swedish EPA, the Farmers Union and the Water and Wastewater Association which includes the recommendations in table 3.1-1. These agreements are based more on practical experience than on scientific data. Sweden also used to have a recommended limit value for toluene, but this has been omitted (WALLGREN 2001).

    pdf53p ut_hai_can 29-12-2012 32 4   Download

  • Organic agriculture offers developing countries a wide range of economic, environment, social and cultural benefits. Global markets for certified organic products have been growing rapidly over the past two decades. In 2006, global certified organic sales were estimated to have reached over 30 billion Euros, a 20 per cent increase over 2005, and are expected to increase to 52 billion Euros by 2012 (UNEP-UNCTAD, 2008). While most sales are in North America and Europe, production is global with developing countries producing and exporting ever-increasing shares.

    pdf20p ut_hai_can 29-12-2012 21 3   Download

  • It is important to understand at the outset the natural hydrochemical conditions that exist in aquifer systems, as these provide the necessary baseline from which quality changes caused by human impacts can be determined. The natural hydrochemical conditions may also affect the behaviour of some pollutants. Because groundwater movement is typically slow and residence times long, there is potential for interaction between the water and the rock material through which it passes.

    pdf32p cao_can 29-12-2012 22 3   Download

  • Automatic sampler (optional)—The sampler must incorporate glass sample containers for the collection of a minimum of 250 mL of sample. Sample containers must be kept refrigerated at 4°C and protected from light during compositing. If the sampler uses a peristaltic pump, a minimum length of compressible silicone rubber tubing may be used. Before use, however, the compressible tubing should be thoroughly rinsed with methanol, followed by repeated rinsings with distilled water to minimize the potential for contamination of the sample.

    pdf19p cao_can 02-01-2013 24 2   Download

  • Cuốn sách này có tiêu đề Các chỉ tiêu lý hóa chất xử lý nước và nước thải . Điều này chương bắt đầu bằng cách xác định nước thải và điều trị vật lý-hóa học của nước và nước thải và xử lý một thời gian ngắn phạm vi bảo hiểm. Nó cũng có địa chỉ các hoạt động đơn vị và quá trình đơn vị.

    pdf93p bengoan369 14-12-2011 49 16   Download

  • Bơm là một hoạt động đơn vị được sử dụng để di chuyển chất lỏng từ điểm này đến điểm khác. Chương này thảo luận về các chủ đề khác nhau của hoạt động này đơn vị quan trọng liên quan đến việc điều trị vật lý của nước và nước thải.

    pdf32p bengoan369 14-12-2011 25 12   Download

  • Các thành phần của nước và Xử lý nước thải Với một lý nước thải, quy trình cần được áp dụng để điều trị nó: sinh học, hóa chất, hoặc vật lý? Được điều trị bằng một sự kết hợp của các quá trình? Những câu hỏi này không có thể được trả lời, trừ khi các thành phần của nước thải được biết đến. Vì vậy, trước khi bất kỳ nước thải được xử lý, nó quan trọng là các thành phần của nó được xác định.

    pdf53p bengoan369 14-12-2011 28 11   Download

CHỦ ĐỀ BẠN MUỐN TÌM

Đồng bộ tài khoản