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Dieldrin and endrin removal from water by triolein-embedded adsorbent

机译：嵌入三油精的吸附剂从水中去除狄氏剂和异狄氏剂

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摘要

A novel triolein-embedded adsorbent for removal of persistent organic pollutants (POPs) from water was developed. In this paper, taking dieldrin and endrin as the target pollutants, different factors (temperature, ion strength, pH, and concentration of humic acid) that affect the adsorption rate were investigated. Adsorption isotherms of these two pollutants fitted to Freundlich model well identified the partition mechanism between the adsorbent and water. However, the equilibrium constant of dieldrin was larger than that of endrin due to larger octanol-water coefficient of dieldrin. Adsorption rate of dieldrin increased with the increase of temperature, the decrease of ion strength, pH and concentration of humic acid, whereas adsorption rate of endrin decreased with the increase of temperature and pH. Humic acid firstly increased, and then decreased the adsorption rate of endrin. Ion strength hardly affected the adsorption rate of endrin.
机译：开发了一种新型的嵌入三油精的吸附剂，用于从水中去除持久性有机污染物（POPs）。本文以狄氏剂和异狄氏剂为目标污染物，研究了影响吸附速率的不同因素（温度，离子强度，pH和腐殖酸浓度）。符合Freundlich模型的这两种污染物的吸附等温线很好地确定了吸附剂和水之间的分配机理。然而，由于狄氏剂的辛醇-水系数较大，狄氏剂的平衡常数大于异狄氏剂的平衡常数。狄氏剂的吸附速率随温度的升高而增加，离子强度，pH和腐殖酸浓度的降低，而异狄氏剂的吸附速率随温度和pH的升高而降低。腐殖酸首先升高，然后降低了异狄氏剂的吸附速率。离子强度几乎不影响异狄氏剂的吸附速率。

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