Arsenate removal using Donnan dialysis-zerovalent iron combined process

被引：0

作者：

Zhao B. ^{[1
,2
]}

Liu N. ^{[2
]}

Wang H. ^{[2
]}

Qian Y. ^{[2
]}

Zhang Z. ^{[1
,2
]}

Wang L. ^{[1
]}

机构：

[1] State Key Laboratory of Separation Membranes and Membrane Processes, Tiangong University, Tianjin

[2] School of Environmental Science and Engineering, Tiangong University, Tianjin

来源：

Huagong Xuebao/CIESC Journal | 2020年 / 71卷 / 11期

关键词：

Adsorption; Donnan dialysis; Ion exchange; Regeneration; Zerovalent iron;

D O I：

10.11949/0438-1157.20200358

中图分类号：

学科分类号：

摘要：

The Donnon dialysis-zerovalent iron combined process was developed by adding zerovalent iron into the stripping solution. The arsenic adsorption by the zerovalent iron corrosion products was able to regenerate the stripping solution in situ. Therefore, the long-term arsenic removal by the Donnan dialysis system was markedly improved. In this study, the effect of NaCl concentration in the desorption solution was determined to be 0.1 mol•L-1 based on the investigation of the effect of the NaCl concentration in the desorption solution on the arsenic removal performance of zero-valent iron. Then, the proposed Donnon dialysis-zerovalent iron combined process was used to treat arsenic containing well water for multiple batches, using stripping solution containing 6 g common salt and 5 g zerovalent iron per liter. The arsenic concentrations in the treated water was constantly below 50 μg•L-1 for 20 batches, much lower than the performance of the single Donnan dialysis system. The coupling of Donnan dialysis with zerovalent iron prolonged the interval for the stripping solution replacement; therefore, the practical application of the Donnan dialysis household water purifier was significantly improved. © 2020, Chemical Industry Press Co., Ltd. All right reserved.

引用

页码：5303 / 5308

页数：5

共 30 条

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