INFLUENTING FACTORS OF CHITOSAN-MODIFIED ZEOLITE AND ITS STABILIZATION EFFECT ON MULTI METAL CONTAMINATED SOIL

MA Yan; ZHANG Dading; ZHANG Fan; CHENG Lu; MA Yue; GUO Jianda

doi:10.13205/j.hjgc.202201014

Volume 40 Issue 1

Mar. 2022

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MA Yan, ZHANG Dading, ZHANG Fan, CHENG Lu, MA Yue, GUO Jianda. INFLUENTING FACTORS OF CHITOSAN-MODIFIED ZEOLITE AND ITS STABILIZATION EFFECT ON MULTI METAL CONTAMINATED SOIL[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(1): 94-101,116. doi: 10.13205/j.hjgc.202201014

Citation:

MA Yan, ZHANG Dading, ZHANG Fan, CHENG Lu, MA Yue, GUO Jianda. INFLUENTING FACTORS OF CHITOSAN-MODIFIED ZEOLITE AND ITS STABILIZATION EFFECT ON MULTI METAL CONTAMINATED SOIL[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(1): 94-101,116. doi: 10.13205/j.hjgc.202201014

Citation:

MA Yan, ZHANG Dading, ZHANG Fan, CHENG Lu, MA Yue, GUO Jianda. INFLUENTING FACTORS OF CHITOSAN-MODIFIED ZEOLITE AND ITS STABILIZATION EFFECT ON MULTI METAL CONTAMINATED SOIL[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(1): 94-101,116. doi: 10.13205/j.hjgc.202201014

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INFLUENTING FACTORS OF CHITOSAN-MODIFIED ZEOLITE AND ITS STABILIZATION EFFECT ON MULTI METAL CONTAMINATED SOIL

doi: 10.13205/j.hjgc.202201014

MA Yan^{1
,
,},
ZHANG Dading^1,2,
ZHANG Fan¹,
CHENG Lu¹,
MA Yue¹,
GUO Jianda¹

1. China University of Mining and Technology (Beijing), Beijing 100083, China;
2. Center International Group Co., Ltd, Beijing 100176, China

Received Date: 2021-05-08
Available Online: 2022-03-30
Publish Date: 2022-03-30

Abstract

Abstract

In this study, Pb-, Zn-, and Cd-contaminated soil was stabilized by chitosan-modified zeolite. Scanning electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction, and toxicity characteristic leaching procedure extraction methods were used to analyze the composition of the modified materials and their stabilizing effect on multi-metal-contaminated soil. In addition, the effect of the modified material dosages, soil water content, and pH on the stabilization of the contaminated soil were investigated.Resultsshowed that the surface of the modified material had a clear fibrous structure and a uniform synaptic structure. The characteristic peak of N1 s was increased at a binding energy of approximately 400 eV, confirming that chitosan was loaded onto the surface of the zeolite and calcium silicate particles had a modifying effect. The stabilization effect reached its maximum when the maximum dosage was 10%. With the increase in water content, the leaching concentration increased slightly. Under different water content, the competition on Pb stabilization of Zn and Cd was not evident. When the soil environment was weakly acid-base or neutral, Zn and Cd showed no competitive advantage in Pb stabilization, but Zn and Cd had a stronger competitive advantage under strong acid or strong alkali environment, thereby inhibiting the stabilization of Pb. This study developed a novel and efficient soil stabilization material, providing a basis for the remediation of polymetallic contaminated sites.
- zeolite modified by chitosan,
- multi-metal contaminated soil,
- stabilization of heavy metals,
- leaching behavior,
- influenting factors

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References(35)

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