Simultaneous Immobilization of Zn(II) and Cr(III) in Spinel Crystals from Beneficial Utilization of Waste Brownfield-Site Soils

Wu, Fei1,2,3; Tang, Yuanyuan4; Lu, Xingwen5; Liu, Chengshuai1,2; Lv, Yahui2; Tong, Hui2; Ning, Zengping1; Liao, Changzhong2; Li, Fangbai2

2019

10.1007/s42860-019-00053-w

Clays and Clay Minerals   影响因子和分区

15528367

1552-8367

Waste brownfield-site soils contaminated with heavy metals such as Zn and Cr are of critical environmental concern because of the rapid urbanization and industrialization that is occurring in China. Thermal treatment can fix heavy metals in specific mineral structures, which might be a promising technology for remediation and reutilization of the metal-contaminated soils. The objective of the present study was to elucidate the stabilization mechanisms of Zn and Cr through thermal treatment of mixtures of ZnO + Cr2O3 to form ZnCr2O4 and to confirm that Zn and Cr were incorporated simultaneously into the spinel structure. The incorporation efficiency for Zn was quantified, with the value ranging from 70.6 to 100% over the temperature range 700–1300°C. Leaching results further confirmed that ZnCr2O4 spinel was a superior product for Zn and Cr immobilization. Then, by artificially sintering Zn- and Cr-enriched soils, both Zn and Cr were immobilized effectively (with three orders of magnitude reduction in Zn leachability) in the ZnCr2O4 spinel as the predominant product phase. In addition, multiple heavy metals such as Zn, Cu, and Cr in the actual brownfield-site soils were well immobilized after sintering, which confirmed the potential for practical application of the thermal treatment technology utilized in this study.
© 2020, The Clay Minerals Society.

Brownfield site soils Chromium Simultaneous immobilization Spinel Thermal treatment Zinc

SCI ; EI

英语

其他

National Basic Research Program of China (973 Program)[2018YFC1801402] ; Chinese Academy of Sciences[QYZDB-SSW-DQC046] ; [2016TX03Z086] ; [201804010197] ; [U1701241]

Chemistry ; Geology ; Mineralogy ; Agriculture

Chemistry, Physical ; Geosciences, Multidisciplinary ; Mineralogy ; Soil Science

WOS:000510277700001

Springer

20200608127710

Chromium ; Contamination ; Heat treatment ; Heavy metals ; II-VI semiconductors ; Remediation ; Sintering ; Soil pollution ; Soils ; Zinc ; Zinc oxide

Environmental Impact and Protection:454.2 ; Soils and Soil Mechanics:483.1 ; Metallurgy and Metallography:531 ; Heat Treatment Processes:537.1 ; Chromium and Alloys:543.1 ; Zinc and Alloys:546.3 ; Inorganic Compounds:804.2

GEOSCIENCES

Web of Science

1.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang; 550081, China
2.Guangdong Key Laboratory of Integrated Agro-Environmental Pollution Control and Management, Guangdong Institute of Eco-Environmental Sciences & Technology, Guangzhou; 510650, China
3.University of Chinese Academy of Sciences, Beijing; 100049, China
4.School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen; 518055, China
5.Research Centre for Environmental Health and Pollution Control, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou; 510006, China

Wu, Fei,Tang, Yuanyuan,Lu, Xingwen,et al. Simultaneous Immobilization of Zn(II) and Cr(III) in Spinel Crystals from Beneficial Utilization of Waste Brownfield-Site Soils[J]. Clays and Clay Minerals,2019,67(4):315-324.

Wu, Fei.,Tang, Yuanyuan.,Lu, Xingwen.,Liu, Chengshuai.,Lv, Yahui.,...&Li, Fangbai.(2019).Simultaneous Immobilization of Zn(II) and Cr(III) in Spinel Crystals from Beneficial Utilization of Waste Brownfield-Site Soils.Clays and Clay Minerals,67(4),315-324.

Wu, Fei,et al."Simultaneous Immobilization of Zn(II) and Cr(III) in Spinel Crystals from Beneficial Utilization of Waste Brownfield-Site Soils".Clays and Clay Minerals 67.4(2019):315-324.