Removal of Diclofenac from Aqueous Phase by Birnessite: Effects of pH and Common Ions

文献类型： 外文期刊

第一作者： Zhao, Yue

作者： Zhao, Yue;Liu, Fei;Zhao, Yue;Zhao, Yue;Qin, Xiaopeng

作者机构：

关键词： Birnessite; Diclofenac; Removal; Adsorption; Ionic composition

期刊名称：WATER AIR AND SOIL POLLUTION （ 影响因子：2.52； 五年影响因子：2.574 ）

ISSN： 0049-6979

年卷期： 2019 年 230 卷 1 期

页码：

收录情况： SCI

摘要： In this study, the removal of diclofenac (DCF) from aqueous phase by birnessite, a layered manganese oxide, was investigated by batch experiments. The results indicated that 90% of DCF was removed by birnessite within 4h in different initial concentrations of DCF, and the kinetic experiment data were well fitted with pseudo-first-order kinetic model (R-2>0.98). The removal of DCF by birnessite was pH-dependent, and low pH was beneficial to the reaction. The presence of Fe2+ and Mn2+ strongly inhibited the removal of DCF. However, Ca2+, Mg2+, Zn2+, Cu2+, and humic acid (HA) promoted the reaction and following the order: Cu2+>Zn2+>HA>Mg2+approximate to Ca2+. In addition, some typical anions, such as NO3-, PO43-, and SO42-, had slight effects on the reaction. Electrochemical results demonstrated that the adsorption of DCF on birnessite was reaction rate-limiting step.

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