CHANG Xin-qiang,LIN Tao,CHEN Wei,et al.PAC/PS Pretreatment Process for Removal of Cadmium from Water and Control of Ultrafiltration Membrane Fouling[J].China Water & Wastewater,2022,38(2022 1 1):64-69.
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PAC/PS Pretreatment Process for Removal of Cadmium from Water and Control of Ultrafiltration Membrane Fouling

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第38卷 Number: 2022 1 1 Page: 64-69 Column: Date of publication: 2022-01-01
Author(s):
CHANG Xin-qiang1; 2; 3; 4;  LIN Tao2; 3;  CHEN Wei2; 3;  TAO Hui2; 3
（1. School of Environmental and Municipal Engineering， North China University of Water Resources and Electric Power， Zhengzhou 450011， China； 2. Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes ， Hohai University， Nanjing 210098， China； 3. College of Environment， Hohai University， Nanjing 210098， China； 4. College of Civil Engineering， Southwest Forestry University， Kunming 650224， China）
Keywords:
powdered activated carbon;  persulfate;  cadmium;  natural organic matter;  ultrafiltration;  membrane fouling
Abstract:
Powdered activated carbon coupled with persulfate (PAC/PS) was employed as the pretreatment process of ultrafiltration, and its effects on cadmium and natural organic matter removal in raw water and ultrafiltration membrane fouling control were investigated. For raw water samples in which cadmium exceeded 6 times of the standard value, the removal efficiencies of UV254, DOC and cadmium were 91.7%, 68.2% and 92.7% respectively when the contact time was 60 min and the dosage of PAC and PS were 30 mg/L and 300 μmol/L, and the cadmium concentration could be reduced to the limitation of 5 μg/L specified in Standards for Drinking Water Quality (GB 5749-2006). Compared with direct ultrafiltration, after setting the PAC/PS pretreatment process,the specific flux recovery rate of ultrafiltration membrane was increased by 50.5%, and the total interface interaction energy between colloid pollutants and UF membrane predicted by XDLVO model was reduced by 75.38%, indicating that ultrafiltration membrane fouling was alleviated.
Last Update: 2022-01-01