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[ subject:"Environmental science." ]
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Removal of heavy metals from aqueous...
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Ghanayem, Mohamed Farid.
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Removal of heavy metals from aqueous solutions by soils.
紀錄類型:
書目-電子資源 : Monograph/item
正題名/作者:
Removal of heavy metals from aqueous solutions by soils./
作者:
Ghanayem, Mohamed Farid.
出版者:
Ann Arbor : ProQuest Dissertations & Theses, : 1989,
面頁冊數:
209 p.
附註:
Source: Dissertation Abstracts International, Volume: 50-07, Section: B, page: 2822.
Contained By:
Dissertation Abstracts International50-07B.
標題:
Environmental science. -
電子資源:
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=8923168
Removal of heavy metals from aqueous solutions by soils.
Ghanayem, Mohamed Farid.
Removal of heavy metals from aqueous solutions by soils.
- Ann Arbor : ProQuest Dissertations & Theses, 1989 - 209 p.
Source: Dissertation Abstracts International, Volume: 50-07, Section: B, page: 2822.
Thesis (Ph.D.)--The University of Texas at Dallas, 1989.
Trace metal transport from terrestrial to aquatic ecosystems including groundwater is strongly mediated by soil chemical interactions. Groundwater contamination from disposal of hazardous wastes has aroused much concern in the United States. This concern was part of the motivation for Congress to pass the Resource Conservation and Recovery Act of 1976, the Toxic Substance Control Act of 1976, the Comprehensive Environmental Response Compensation and Liability Act of 1980, and the Clean Water Act of 1987. In the 1970's, EPA suggested four pollutants most commonly found in groundwater; chlorides, nitrates, heavy metals and hydrocarbons.Subjects--Topical Terms:
677245
Environmental science.
Removal of heavy metals from aqueous solutions by soils.
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Trace metal transport from terrestrial to aquatic ecosystems including groundwater is strongly mediated by soil chemical interactions. Groundwater contamination from disposal of hazardous wastes has aroused much concern in the United States. This concern was part of the motivation for Congress to pass the Resource Conservation and Recovery Act of 1976, the Toxic Substance Control Act of 1976, the Comprehensive Environmental Response Compensation and Liability Act of 1980, and the Clean Water Act of 1987. In the 1970's, EPA suggested four pollutants most commonly found in groundwater; chlorides, nitrates, heavy metals and hydrocarbons.
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Due to their specific properties (nonexchange adsorption, ion exchange capacity, biological activity) soil and soil materials, such as clay minerals, could play a significant role in removing many of the pollutants present in wastewater (Evans et al., 1983). Many methods have been used in treating industrial wastewater polluted with heavy metals. One method of treatment which is of particular interest for this research is the method of ion exchange. The sorption of heavy metals by the soil or soil components can be influenced by soil pH. Other parameters such as metal concentration, cation exchange capacity (CEC), and type of soil, can influence the behavior of heavy metals.
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The phenomena of heavy metal sorption (such as Cd, Co, Cr, Cu, Pb, Ni, and Zn) by soil and clay minerals from aqueous solutions was investigated. Experiments were performed using soil from the University of Texas at Dallas (UTD) campus, montmorillonite clay, bentonite clay, and sand, as well as lining materials from two dump sites, one a hazardous waste site, and the other a municipal solid-waste site. Solutions of cadmium, cobalt, chromium, copper, lead, nickel and zinc in concentrations of 10 mg/l were prepared. Experiments were conducted to establish the equilibrium contact time. Another experiment was performed to study the leachate of heavy metals through soil columns. Parameters such as soil dosage, metal solution pH, and the effect of the presence of more than one metal were investigated.
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This research covers the following areas: the identification of alternatives for more effective and economical ways to treat municipal and industrial wastewater, the study of mobility patterns of valently different heavy metals as a function of pH in different kinds of soil components, and the evaluation of the use of clay minerals as liners for waste disposal sites.
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