Effects of organic acids, o-phenylenediamine and pyrocatechol on cadmium adsorption and desorption in soil
文献类型：期刊论文
| 作者 | Zhou, DM; Chen, HM; Wang, SQ; Zheng, CR |
| 刊名 | WATER AIR AND SOIL POLLUTION
 |
| 出版日期 | 2003-05-01 |
| 卷号 | 145期号:1页码:109-121 |
| ISSN号 | 0049-6979 |
| 关键词 | cadmium interaction o-phenylenediamine organic acid pyrocatechol soil |
| 通讯作者 | Chen, HM() |
| 英文摘要 | This article studied the interaction of cadmium (Cd) and low molecular weight organics in Indicotic black (IB) soil. Cadmium adsorption isotherm in this soil was satisfactorily simulated using Freundlich equation as Q = 905.6C(0.49) with high correlation (r(2) = 0.984), and its adsorption quantity increased with increasing pH. The presence of citric acid and EDTA significantly reduced Cd adsorption in soil, which was due to the formation of soluble Cd-organic complex. Concentration of cadmium ions in equilibrium solution was determined and percentages of [CdH(2)Cit(+)]/[Cd-complex(Total)], [CdHCit]/[Cd-complex(Total)] and [CdCit(-)]/[Cd-complex(Total)] vs. pH were successfully calculated. Desorption percentage of Cd, adsorbed in the presence of citric acid and EDTA decreased, compared with that adsorbed in NaNO3 media. It suggests that free sites for Cd adsorption in soil increased in the presence of organic acid. When o-phenylenediamine, pyrocatechol and aminoethonic acid appeared in Cd equilibrium media, Cd adsorption quantity increased by increasing cation exchange of positively charged cadmium complex with soil at low pH. Compared with that performed in the absence of these organics, the exchangeable Cd, desorbed by 0.1 mol L-1 NaNO3, reduced obviously, which suggests that Cd-complex was more difficult to be desorbed than Cd2+. Moreover, % Cd desorbed was linearly correlated with the reverse of the total Cd adsorption under unsaturated adsorption. |
| 收录类别 | SCI |
| WOS关键词 | SORPTION ; LIGANDS ; MONTMORILLONITE ; COMPLEXATION ; RELEASE ; CU(II) |
| WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences ; Water Resources |
| WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences ; Water Resources |
| 语种 | 英语 |
| 出版者 | KLUWER ACADEMIC PUBL |
| WOS记录号 | WOS:000182709500009 |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2559222 |
| 专题 | 南京土壤研究所 |
| 通讯作者 | Chen, HM |
| 作者单位 | Chinese Acad Sci, Inst Soil Sci, Nanjing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhou, DM,Chen, HM,Wang, SQ,et al. Effects of organic acids, o-phenylenediamine and pyrocatechol on cadmium adsorption and desorption in soil[J]. WATER AIR AND SOIL POLLUTION,2003,145(1):109-121. |
| APA | Zhou, DM,Chen, HM,Wang, SQ,&Zheng, CR.(2003).Effects of organic acids, o-phenylenediamine and pyrocatechol on cadmium adsorption and desorption in soil.WATER AIR AND SOIL POLLUTION,145(1),109-121. |
| MLA | Zhou, DM,et al."Effects of organic acids, o-phenylenediamine and pyrocatechol on cadmium adsorption and desorption in soil".WATER AIR AND SOIL POLLUTION 145.1(2003):109-121. |
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来源：南京土壤研究所
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