Diclofenac removal from water by photocatalysis- assisted filtration using activated carbon modified with N-doped TiO2

被引：42

作者：

Apopei, Petru ^{[1
]}

Orha, Corina ^{[2
]}

Popescu, Mina Ionela ^{[2
,3
]}

Lazau, Carmen ^{[2
]}

Manea, Florica ^{[3
]}

Catrinescu, Cezar ^{[1
]}

Teodosiu, Carmen ^{[1
]}

机构：

[1] Gheorghe Asachi Tech Univ Iasi, Cristofor Simionescu Fac Chem Engn & Environm Pro, Dept Environm Engn & Management, 73 Prof Dr Mangeron Str, Iasi 700050, Romania

[2] Natl Inst Res & Dev Electrochem & Condensed Matte, AP Podeanu 144, Timisoara 300569, Romania

[3] Politehn Univ Timisoara, Fac Ind Chem & Environm Engn, PiataVictoriei 2, RO-300006 Timisoara, Romania

来源：

PROCESS SAFETY AND ENVIRONMENTAL PROTECTION | 2020年 / 138卷

关键词：

Diclofenac; Emerging pollutant; Drinking water; Activated carbon modified with TiO2; UV irradiation-assisted filtration; HUMIC-ACID; ADSORPTION CHARACTERISTICS; EMERGING POLLUTANTS; AQUEOUS-SOLUTIONS; DEGRADATION; CONTAMINANTS; ZEOLITE; SODIUM; BATCH; OXIDE;

D O I：

10.1016/j.psep.2020.03.012

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The aim of this study was to develop powdered and granular activated carbon modified with N doped TiO2, namely PAC-TiO2N and respective, GAC-TiO2N by sol-gel method, starting from commercial activated carbon, for the removal from water of diclofenac (DCF), an emerging pollutant. The synthesized materials were characterized systematically and morphostructural, light absorption and electrical charge properties were determined. The sorption and photocatalytic capacities of both materials were determined by batch experiments based on the kinetic models and the effect of operational parameters. GAC-TiO2N was selected for further testing in fixed bed-column experiments envisaging its potential integration with real drinking water treatment technology. The GAC-TiO2N tested in UV irradiation-assisted fixed bed-column filtration for DCF removal exhibited a great potential for practical application, by testing in simulated coexisting DCF and humic acids (HAs) and real surface water spiked with DCF (Bega River, Timisoara city, Romania). About 80% removal efficiency was noticed for both DCF and HAs and about 70% of the organic matter was removed (expressed as total organic carbon- TOC indicator). UV irradiation during filtration allowed the activation of the GAC-TiO2N filtration layer without TiO2 loss, which led to longer life-times due to the potential "self-cleaning" effect and its good stability. (C) 2020 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.

引用

页码：324 / 336

页数：13

共 51 条

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