Converting loess into zeolite for heavy metal polluted soil remediation based on “soil for soil-remediation” strategy

Zheng，Renji1,2,3; Feng，Xuezhen1,3; Zou，Wensong1,3; Wang，Ranhao1,3; Yang，Dazhong1,3; Wei，Wenfei1,3; Li，Shangying1,3; Chen，Hong1,3

2021-06-15

10.1016/j.jhazmat.2021.125199

JOURNAL OF HAZARDOUS MATERIALS   影响因子和分区

0304-3894

1873-3336

Both soil erosion and soil contamination pose critical environmental threats to the Chinese Loess Plateau (CLP). Green, efficient and feasible remediation technologies are highly demanded to meet these challenges. Herein we propose a unique “soil for soil-remediation” strategy to remediate the heavy metal polluted soil in CLP by converting loess into zeolite for the first time. With a simple template-free route, the natural loess can be converted into cancrinite (CAN) type of zeolite. A highly crystalline CAN was obtained via hydrothermal treatment at 240 C for 48 h, with a precursor alkalinity of Na/(Si+Al)> 2.0. The as-synthesized CAN zeolite exhibits excellent remediation performance for Pb(II) and Cu(II) polluted soil. Plant assay experiment demonstrates that CAN can significantly restrain the uptake and accumulation of Pb(II) and Cu(II) ions in vegetables, with a high removal efficiency up to 90.7% and 81.4%, respectively. This work demonstrates a “soil for soil-remediation” strategy to utilize the natural loess for soil remediation in CLP, which paves the way for developing green and sustainable remediation eco-materials with local loess as raw materials.

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Both soil erosion and soil contamination pose critical environmental threats to the Chinese Loess Plateau (CLP). Green, efficient and feasible remediation technologies are highly demanded to meet these challenges. Herein we propose a unique “soil for soil-remediation” strategy to remediate the heavy metal polluted soil in CLP by converting loess into zeolite for the first time. With a simple template-free route, the natural loess can be converted into cancrinite (CAN) type of zeolite. A highly crystalline CAN was obtained via hydrothermal treatment at 240 C for 48 h, with a precursor alkalinity of Na/(Si+Al)> 2.0. The as-synthesized CAN zeolite exhibits excellent remediation performance for Pb(II) and Cu(II) polluted soil. Plant assay experiment demonstrates that CAN can significantly restrain the uptake and accumulation of Pb(II) and Cu(II) ions in vegetables, with a high removal efficiency up to 90.7% and 81.4%, respectively. This work demonstrates a “soil for soil-remediation” strategy to utilize the natural loess for soil remediation in CLP, which paves the way for developing green and sustainable remediation eco-materials with local loess as raw materials.

Cancrinite Zeolite Heavy Metal Polluted Soil Remediation Loess Utilization Soil For Soil-remediation

SCI ; EI

英语

第一 ; 通讯

Foundation of Shenzhen Science and Technology Innovation Commission[JCYJ20190809144409460] ; National Natural Science Foundation of China[21777045] ; Natural Science Funds for Distinguished Young Scholar of Guangdong Province, China[2020B151502094]

Engineering ; Environmental Sciences & Ecology

Engineering, Environmental ; Environmental Sciences

WOS:000647500000002

ELSEVIER

20210609895099

Copper compounds ; Heavy metals ; Lead compounds ; Nanocrystalline materials ; Remediation ; Sediments ; Soil conservation ; Soils ; Zeolites

Environmental Impact and Protection:454.2 ; Soil Mechanics and Foundations:483 ; Soils and Soil Mechanics:483.1 ; Metallurgy and Metallography:531 ; Nanotechnology:761 ; Inorganic Compounds:804.2

ENGINEERING

Web of Science

1.School of Environmental Science and Engineering,State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control,Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control,Southern University of Science and Technology,Shenzhen,518055,China
2.National Engineering Laboratory for Methanol to Olefins,Dalian National Laboratory for Clean Energy,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian,116023,China
3.Shenzhen Key Laboratory of Interfacial Science and Engineering of Materials,Shenzhen,518055,China

Zheng，Renji,Feng，Xuezhen,Zou，Wensong,等. Converting loess into zeolite for heavy metal polluted soil remediation based on “soil for soil-remediation” strategy[J]. JOURNAL OF HAZARDOUS MATERIALS,2021,412.

Zheng，Renji.,Feng，Xuezhen.,Zou，Wensong.,Wang，Ranhao.,Yang，Dazhong.,...&Chen，Hong.(2021).Converting loess into zeolite for heavy metal polluted soil remediation based on “soil for soil-remediation” strategy.JOURNAL OF HAZARDOUS MATERIALS,412.

Zheng，Renji,et al."Converting loess into zeolite for heavy metal polluted soil remediation based on “soil for soil-remediation” strategy".JOURNAL OF HAZARDOUS MATERIALS 412(2021).