Low-Cost ceramic disk filters coated with Graphitic carbon nitride (g-C3N4) for drinking water disinfection and purification

被引：9

作者：

Li, Xiang ^{[1
]}

Huang, Guohe ^{[2
,5
]}

Li, Yongping ^{[2
]}

Chen, Xiujuan ^{[3
]}

Yao, Yao ^{[4
]}

Liang, Ying ^{[1
]}

Huang, Jing ^{[4
]}

Zhao, Kai ^{[4
]}

Yin, Jianan ^{[4
]}

机构：

[1] Beijing Normal Univ, Sch Environm, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100875, Peoples R China

[2] Beijing Normal Univ, China Canada Ctr Energy Environm & Ecol Res, Sch Environm, UR BNU,State Key Joint Lab Environm Simulat & Pol, Beijing 100875, Peoples R China

[3] Univ Calgary, Dept Civil Engn, 2500 Univ Dr NW, Calgary, AB T2N 1N4, Canada

[4] Univ Regina, Fac Engn & Appl Sci, Environm Syst Engn, Regina, SK S4S 0A2, Canada

[5] Univ Regina, Environm Syst Engn Program, Regina, SK S4S 0A2, Canada

来源：

SEPARATION AND PURIFICATION TECHNOLOGY | 2022年 / 292卷

关键词：

Ceramic filter; Water safety; Household water treatment; g-C3N4; E. coli removal; Photocatalyst; DRIVEN PHOTOCATALYTIC INACTIVATION; VISIBLE-LIGHT; ESCHERICHIA-COLI; BACTERIAL INACTIVATION; HYBRID PHOTOCATALYST; SILVER NANOPARTICLES; SOLAR DISINFECTION; SURFACE WATERS; NANO-ZNO; NANOSHEETS;

D O I：

10.1016/j.seppur.2022.120999

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Access to safe drinking water is a challenge in remote and rural areas, where thus urgently need cost-effective household drinking water purification device. In this study, a ceramic disk filter coated with modified g-C3N4 (MCN@CDF) was developed for drinking water disinfection and purification. Factorial analysis results showed that factors including the coating amount of MCN, light intensity, influent humic acid (HA) concentration, influent turbidity, and influent pH had significant positive effects on the E. coli removal efficiency of MCN@CDF. However, the influent turbidity had a significant negative effect on the permeability. The significant 2-factor interaction effects on the performance of MCN@CDF were also discussed. The developed MCN@CDF showed an exceptional performance in bacterial removal, and the log reduction value (LRV) could reach up to 7.14. This could be ascribed to the synergistic effect of physical retention and photocatalytic disinfection. The photo catalytic disinfection was induced by MCN under light irradiation, which produced H2O2 and h(+) to inactivate E. coli. These reactive species could attack E. coli cells, causing changes in the cell shape and damage to DNA. The developed MCN@CDF also exhibited excellent practicability during treating realistic ground water, which met the standard of drinking water after purification with MCN@CDF. This study provided a low-cost and safe alternative for household drinking water purification in rural areas.

引用

页数：13