河流表层沉积物对聚二甲基硅氧烷、多氯联苯、硝酸镉、硫酸铜、硫酸镍和硝酸锌的吸附与解吸

Adsorption and desorption of polydimethylsiloxane, PCBs, cadmium nitrate, copper sulfate, nickel sulfate and zinc nitrate by river surface sediments.

作者信息

Watanabe N, Sato E, Ose Y

出版信息

Sci Total Environ. 1985 Feb;41(2):153-61. doi: 10.1016/0048-9697(85)90185-8.

PMID:3920758

Abstract

An investigation into the adsorption and desorption of polydimethylsiloxane, PCBs, cadmium nitrate, copper sulfate, nickel nitrate and zinc nitrate by river sediments was carried out using either a flow-through system or a semi-static system. The material balance in the sediment compartment could be explained by the equation, dCs/dT= K1Cw-K2Cs. The adsorption rate constants (K1), desorption rate constants (K2) and concentration factors (K1/K2) were calculated. For hydrophobic chemicals, the K1's were independent of water solubility, but the K2's were relatively related to water solubility. For both hydrophobic chemicals and heavy metals, the concentration factors per fraction organic carbon were similar to the soil sorption coefficients (Koc), expressed on a organic carbon basis.

摘要

利用流通系统或半静态系统对河流沉积物对聚二甲基硅氧烷、多氯联苯、硝酸镉、硫酸铜、硝酸镍和硝酸锌的吸附和解吸进行了研究。沉积物隔室中的物质平衡可用方程dCs/dT = K1Cw - K2Cs来解释。计算了吸附速率常数（K1）、解吸速率常数（K2）和浓缩因子（K1/K2）。对于疏水性化学物质，K1与水溶性无关，但K2与水溶性相对相关。对于疏水性化学物质和重金属，每单位有机碳的浓缩因子与以有机碳为基础表示的土壤吸附系数（Koc）相似。