温度和表面活性剂对土壤萘和菲吸附的影响。

Effects of temperature and surfactants on naphthalene and phenanthrene sorption by soil.

机构信息

State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China.

出版信息

J Environ Sci (China). 2009;21(5):667-74. doi: 10.1016/s1001-0742(08)62297-4.

DOI:10.1016/s1001-0742(08)62297-4

PMID:20108670

Abstract

Adsorption experiments were carried out to investigate the sorption behaviors of naphthalene and phenanthrene in six different soils and to determine the effects of temperature, linear alkylbenzene sulfonate (LAS) and cetylrimethyl ammonium bromide (CTAB) on sorption. The results show that for a given sorbent phenanthrene exhibited greater nonlinear and stronger sorption than naphthalene. There was a strong negative correlation for the K(OC) values with organic carbon content (f(OC)). The increase of temperature was not favorable to sorption. Sorption decreased along with the increasing aqueous LAS concentration from 0 to 1000 mg/L. At low CTAB concentration (< 100 mg/L), the adsorption increased as CTAB hemimicelles formed on the soil surface. At high concentration, CTAB decreased the adsorption by occupying active hydrophobic adsorption sites and solubilization of naphthalene and phenanthrene.

摘要

吸附实验研究了萘和菲在 6 种不同土壤中的吸附行为，并考察了温度、直链烷基苯磺酸钠（LAS）和十六烷基三甲基溴化铵（CTAB）对吸附的影响。结果表明，对于给定的吸附剂，菲的非线性和吸附能力均大于萘。K（OC）值与有机碳含量（f（OC））呈强负相关。随着温度的升高，吸附作用不利于吸附。随着水相 LAS 浓度从 0 增加到 1000mg/L，吸附作用逐渐降低。在低 CTAB 浓度（<100mg/L）下，由于 CTAB 半胶束在土壤表面形成，吸附作用增加。在高浓度下，CTAB 通过占据活性疏水吸附位和萘和菲的增溶作用降低了吸附作用。