ENHANCEMENT OF STABILITY AND ANTIMONY REMOVAL PERFORMANCE OF mZVI BY XANTHAN GUM AND GUAR GUM

WANG Yajun; CAI Lijuan

doi:10.13205/j.hjgc.202308006

Volume 41 Issue 8

Aug. 2023

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WANG Yajun, CAI Lijuan. ENHANCEMENT OF STABILITY AND ANTIMONY REMOVAL PERFORMANCE OF mZVI BY XANTHAN GUM AND GUAR GUM[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(8): 41-50. doi: 10.13205/j.hjgc.202308006

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WANG Yajun, CAI Lijuan. ENHANCEMENT OF STABILITY AND ANTIMONY REMOVAL PERFORMANCE OF mZVI BY XANTHAN GUM AND GUAR GUM[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(8): 41-50. doi: 10.13205/j.hjgc.202308006

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ENHANCEMENT OF STABILITY AND ANTIMONY REMOVAL PERFORMANCE OF mZVI BY XANTHAN GUM AND GUAR GUM

doi: 10.13205/j.hjgc.202308006

WANG Yajun^{1,2
,
,},
CAI Lijuan¹

1. School of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, China;
2. Western Engineering Research Center of Disaster Mitigation in Civil Engineering of Education, Lanzhou University of Technology, Lanzhou 730050, China

Received Date: 2022-09-21
Available Online: 2023-11-15

Abstract

Abstract

In order to solve the problem of low structural agglomeration of micron iron mZVI and improve the in-situ remediation effect of mZVI in the remediation of groundwater antimony wastewater, Xanthan gum (XG) and guar gum (GG) modifiers were used to modify mZVI in a certain proportion, and contrast tests of mZVI, mZVI-activated carbon (AC), XG/GG mZVI and XG/GG mZVI-AC were carried out. The stability and viscosity of the four materials were evaluated through sedimentation tests, and antimony was selected as the target pollutant, to explore the removal performance of four materials for antimony. The experimental results illustrated that when the dosage ratio of XG and GG was 4∶1, 3∶2, 1∶1, 3∶2, 1∶4, compared with mZVI and mZVI-AC, the stability of XG/GG-mZVI and XG/GG-mZVI-AC was significantly improved, and the relative spectrophotometric values were all above 90%. As the ratio of XG/GG increase, its stability increased; when the concentration of the modifier was 3.00 g/L, the ratio was 4∶1, the viscosity test result of XG/GG-mZVI was the highest; the removal experiment showed that XG/GG-mZVI has the highest removal rate on antimony, reaching 67.13%. The stability and reactivity of mZVI were improved by the addition of XG and GG, and the buffering effect of the modifier was more obvious when the concentration of the modifier increased.
- micron iron,
- xanthan gum,
- guar gum,
- stability,
- antimony removal

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References(53)

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