INFLUENCE OF SEQUENCE OF THERMAL DESORPTION-STABILIZATION ON SOIL CADMIUM STABILIZATION EFFICIENCY

NIU Mingfen; CHEN Chi; WU Bo; GUO Shuhai; LI Gang; XU Li; YAN Xiaofeng

doi:10.13205/j.hjgc.202302022

Volume 41 Issue 2

Feb. 2023

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2023 > 41(2): 166-172

NIU Mingfen, CHEN Chi, WU Bo, GUO Shuhai, LI Gang, XU Li, YAN Xiaofeng. INFLUENCE OF SEQUENCE OF THERMAL DESORPTION-STABILIZATION ON SOIL CADMIUM STABILIZATION EFFICIENCY[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(2): 166-172. doi: 10.13205/j.hjgc.202302022

Citation:

NIU Mingfen, CHEN Chi, WU Bo, GUO Shuhai, LI Gang, XU Li, YAN Xiaofeng. INFLUENCE OF SEQUENCE OF THERMAL DESORPTION-STABILIZATION ON SOIL CADMIUM STABILIZATION EFFICIENCY[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(2): 166-172. doi: 10.13205/j.hjgc.202302022

Citation:

NIU Mingfen, CHEN Chi, WU Bo, GUO Shuhai, LI Gang, XU Li, YAN Xiaofeng. INFLUENCE OF SEQUENCE OF THERMAL DESORPTION-STABILIZATION ON SOIL CADMIUM STABILIZATION EFFICIENCY[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(2): 166-172. doi: 10.13205/j.hjgc.202302022

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INFLUENCE OF SEQUENCE OF THERMAL DESORPTION-STABILIZATION ON SOIL CADMIUM STABILIZATION EFFICIENCY

doi: 10.13205/j.hjgc.202302022

NIU Mingfen¹,
CHEN Chi^1,2,3,
WU Bo^{2,3
,
,},
GUO Shuhai^2,3,
LI Gang^2,3,
XU Li¹,
YAN Xiaofeng⁴

1. School of Municipal and Environmental Engineering, Shenyang Jianzhu University, Shenyang 110168, China;
2. Shenyang Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China;
3. National-Local Joint Engineering Laboratory of Contaminated Soil Remediation by Bio-Physicochemical Synergistic Process, Shenyang 110016, China;
4. Huludao Ecological Environment Service Center, Huludao 125000, China

Received Date: 2021-12-26
Available Online: 2023-05-25
Publish Date: 2023-02-01

Abstract

Abstract

Thermal desorption-stabilization was the main process for repairing heavy metal-organic co-contaminated soil. Thermal desorption had the dual effect of "activation" and "solidification" on heavy metals in the soil, so the thermal desorption-stabilization sequences will affect the stabilization efficiency of heavy metals. In this study, the co-contaminated soil containing cadmium (Cd) was used as the research object to analyze the effect of thermal desorption-stabilization (T-S) and stabilization-thermal desorption (S-T) processes on Cd stabilization efficiency, from the three levels of leaching rate, morphological distribution, and micromorphology. The results showed that the leaching rate of S-T process (42.26%) was lower than that of T-S process (52.11%). Due to the activation, solidification and stabilization effect of Cd, the ratio of weak acid extraction and residue of soil Cd treated by S-T process was 0.75 and 1.4 times that of T-S process, and the morphological distribution of Cd in the soil tended to be more stable. Scanning electron microscope (SEM) showed that S-T process had more significant soil particle crystallization than T-S process, which characterizes that Cd stabilization was better.
- desorption,
- stabilization,
- process sequence,
- stabilization efficiency,
- leaching rate,
- morphological distribution,
- scanning electron microscope

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References(33)

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