| 滨海地区盐渍土壤对Cd2+的吸附行为 |
| 投稿时间：2010-12-23 修订日期：2011-04-26 点此下载全文 |
| 引用本文：施虹,陈敏.滨海地区盐渍土壤对Cd2+的吸附行为[J].上海海事大学学报,2011,32(2):87-90. |
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| 中文摘要:为评价Cd2+对上海临港新城滨海地区盐渍土壤的影响，通过研究探讨该土壤对Cd2+的吸附行为及吸附机理.结果表明：Cd2+在上海临港新城滨海盐渍土壤中的吸附行为符合Langmuir等温吸附曲线；pH值对土壤中Cd2+的吸附量有明显影响，当pH值介于4~9时吸附量随pH值的增大而急剧增大，当pH值继续增大时吸附量下降并趋于平缓；电解质氯化钠可显著抑制土壤对Cd2+的吸附，随着氯化钠浓度的增大，吸附量先急剧下降，随后趋于平缓；温度升高有利于土壤对Cd2+的吸附，说明上海临港新城滨海盐渍土壤对外源Cd2+的缓冲能力以及土壤中Cd2+的迁移性和活性具有季节性差异. |
| 中文关键词:吸附 重金属 Cd2+ 盐渍土壤 |
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| Adsorption behavior of coastal saline soil to Cd2+ |
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| Abstract:To evaluate the effect of Cd2+ on coastal saline soil in Shanghai Lingang New City, adsorption behavior of the soil to Cd2+ is studied, and the adsorption mechanism is explored. The results show that the adsorption behavior of Cd2+ on coastal saline soil in Shanghai Lingang New City conforms to Langmuir isotherm. The pH of the saline soil influences the adsorption amount of Cd2+ significantly. The adsorption amount increases rapidly with the pH increasing from 4 to 9, and the adsorption amount decreases and then declines to a stable level when the pH continue to increase. Electrolyte NaCl can obviously inhibit the adsorption of Cd2+ on coastal saline soil, the adsorption amount firstly decreases sharply and then tends to be stable with the increase of NaCl concentration. Temperature is conducive to the adsorption of Cd2+ on coastal saline soil, which means that the buffering capacity of the soil in Shanghai Lingang New City and the mobility and activity of Cd2+ in this soil have seasonal difference. |
| keywords:adsorption heavy metal Cd2+ saline soil |
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