Resource utilization of secondary pyrolysis oil-based drilling cuttings ash for removing Cr (VI) contaminants: Adsorption properties, kinetics and mechanism

被引：33

作者：

Liuyang, Xiya ^{[1
]}

Yang, Hang ^{[1
]}

Huang, Siyu ^{[1
]}

Zhang, Yi ^{[2
]}

Xia, Shibin ^{[1
]}

机构：

[1] Wuhan Univ Technol, Sch Resources & Environm Engn, Wuhan 430070, Peoples R China

[2] Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China

来源：

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING | 2020年 / 8卷 / 06期

基金：

中国国家自然科学基金;

关键词：

Oil-based drilling cuttings ash; Cr (VI) removal; Contaminated water; Adsorption kinetics; Adsorption mechanism; WASTE-WATER; XPS SPECTRA; CR(VI); PERFORMANCE; MEMBRANE; NANOPARTICLES; EFFICIENT; REDUCTION; PHOTOCATALYST; COMPOSITES;

D O I：

10.1016/j.jece.2020.104474

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Secondary pyrolysis oil-based drilling cuttings ash (OBCDA-sp) was employed as a new absorbing material to remove Cr (VI) in wastewater. Varying factors, including pH value, dosage of OBCDA-sp, reaction time and original Cr (VI) contents were studied to investigate the Cr (VI) removal efficiency. Elovich and Pseudo-secondorder models were fitted well with the adsorption kinetics process. In addition, the Langmuir model was well employed to fit Cr (VI) adsorption isotherm on OBCDA-sp. The calculated Cr (VI) theoretic adsorption quantity of OBCDA-sp was 48 mg/g. XPS, SEM-EDS, FTIR and XRD were used to characterize the physicochemical properties of OBDCA-sp. The result shows that the complex process of the Cr (VI) removal involves physical and chemical adsorption, and co-precipitation and reduction. Ba, Fe, S and P element onto OBCDA-sp surface have exerted significant role in Cr (VI) removal.

引用

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