原位成形MnFe2O4/D201磁性复合吸附剂对废水中As(V)的高选择性吸附及深度处理

IF 2.8 4区工程技术 Q2 CHEMISTRY, APPLIED

Adsorption Science & Technology Pub Date : 2023-04-21 DOI:10.1155/2023/9084244

Shaopeng Zhang, Jie Ding, Dayong Tian, Feifei Liu, Qiaoling Li, Minghua Lu

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引用次数: 0

摘要

制备了一种具有深度处理能力和高选择性吸附As(V)的新型磁性吸附剂MnFe2O4/D201。根据等温吸附和动力学，As(V)吸附在整个单层吸附过程中主要用于化学键。在pH值为3时，MnFe2O4/D201对As(V)的最大吸附量可达35.8 mg/g。MnFe2O4/D201对Cl-、NO3-、SO42-和PO43-也有较高的选择性吸附。热力学结果表明，吸附过程是自发的吸热过程。经过10次吸附-解吸循环后，吸附量仍保持在初始吸附量的81%。固定床柱实验可处理浓度为1 mg/L ~ 10 μg/L的As(V)。As(V)的有效固化体积为1332 BV (26.64 L)，去除机理主要为静电吸引和络合作用。

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In Situ Forming MnFe2O4/D201 Magnetic Composite Adsorbents for High Selectivity Adsorption and Deep Treatment of As(V) from Wastewater

A new magnetic adsorbent, namely, MnFe2O4/D201, with deep-treatment ability and high selectivity adsorption for As(V) was prepared. According to isotherm adsorption and kinetics, As(V) adsorption is primarily used for chemical bonding throughout the single-layer adsorbing process. The maximum As(V) adsorption capacity of MnFe2O4/D201 can reach 35.8 mg/g at pH 3. MnFe2O4/D201 also exhibits higher selectivity adsorption against Cl-, NO3-, SO42-, and PO43-. According to the thermodynamic results, the adsorption process was spontaneous and endothermic. The adsorption capacity is maintained at 81% of the initial after ten adsorption-desorption cycles. As(V) concentrations ranging from 1 mg/L to 10 μg/L can be treated in fixed-bed column experiments. The effectual cure volume of As(V) reaches 1332 BV (26.64 L). The removal mechanism primarily comprises electrostatic attraction and complexation.

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来源期刊

Adsorption Science & Technology 工程技术-工程：化工

CiteScore

5.00

自引率

10.30%

发文量

181

审稿时长

4.5 months

期刊介绍： Adsorption Science & Technology is a peer-reviewed, open access journal devoted to studies of adsorption and desorption phenomena, which publishes original research papers and critical review articles, with occasional special issues relating to particular topics and symposia.