Journal of South China University of Technology(Natural Science) >

2019 , Vol. 47 >Issue 5: 63 - 72

DOI: https://doi.org/10.12141/j.issn.1000-565X.180558

Materials Science & Technology

Modification of Ceramsite by FeCl3 and the Corresponding Enhancement of Heavy Metals Adsorption
 

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  •   1． School of Materials Science and Engineering，South China University of Technology，Guangzhou 510640，Guangdong， China; 2． College of Urban and Rural Construction，Zhongkai University of Agriculture and Engineering，Guangzhou 510225， Guangdong，China; 3． Guangdong Research Center of Low Carbon Construction Materials Technology，Guangzhou 510640， Guangdong，China; 4． Guangdong Hugro Material Technology Co． ，Ltd． ，Guangzhou 510640，Guangdong，China
杨永民( 1981-) ，男，博士，主要从事新型建筑材料、材料修复水环境及水生态等的研究

Received date: 2018-11-09

  Revised date: 2018-12-18

  Online published: 2019-04-01

Supported by

 Supported by the Science and Technology Planning Project of Guangdong Province( 2016A020221009) 

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Abstract

 In order to improve the adsorption capacity and stability of ceramsite in wastewater with high heavy-metal concentration，porous ceramsite was modified via a pretreatment in FeCl3 solution and a calcination process． Then，the surface morphology of the ceramsite and the removal rates of heavy metals affected by the number of immersion-drying cycles，FeCl3 solution concentration and calcination temperature were investigated． The maximum adsorption capacity was achieved when the ceramsite was immersed in 1. 5 mol/L FeCl3 solution for 3 immersion-drying cycles and then calcined at 650 ℃． In a high heavy-metal concentration environment，the adsorption amount of Cu2 + increases from 0. 188 to 0. 897 mg/g，and the leaching rate of Cu2 + decreases from 3. 52% to 0. 96%． Moreover，the removal rates of Pb2 + ，Cu2 + and Cd2 + by the modified ceramsite respectively achieve 15. 0%， 22. 4% and 50. 1%，which are 7. 7，8. 9 and 9. 7 times that by the original ceramsite，respectively． 

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Cite this article

YANG Yongmin QIAO Ruilong XIE Xiaogeng ZHANG Tongsheng LIU Xiaofei .

Modification of Ceramsite by FeCl3 and the Corresponding Enhancement of Heavy Metals Adsorption
 
[J]. Journal of South China University of Technology(Natural Science), 2019 , 47(5) : 63 -72 . DOI: 10.12141/j.issn.1000-565X.180558

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