Experimental study and application of a compound reagent for treating arsenic residue

LIU Yan; LONG Dongqing; XU Zhengyong; CUI Jing; XIE Huaming; XIONG Weiping

doi:10.13205/j.hjgc.202503012

Volume 43 Issue 3

Mar. 2025

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LIU Yan, LONG Dongqing, XU Zhengyong, CUI Jing, XIE Huaming, XIONG Weiping. Experimental study and application of a compound reagent for treating arsenic residue[J]. ENVIRONMENTAL ENGINEERING , 2025, 43(3): 138-146. doi: 10.13205/j.hjgc.202503012

Citation:

LIU Yan, LONG Dongqing, XU Zhengyong, CUI Jing, XIE Huaming, XIONG Weiping. Experimental study and application of a compound reagent for treating arsenic residue[J]. ENVIRONMENTAL ENGINEERING , 2025, 43(3): 138-146. doi: 10.13205/j.hjgc.202503012

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Experimental study and application of a compound reagent for treating arsenic residue

doi: 10.13205/j.hjgc.202503012

1. Hunan Modern Environment Technology Co., Ltd., Changsha 410008, China;
2. Hunan University, Changsha 410082, China

Received Date: 2024-10-10
Accepted Date: 2025-01-29
Rev Recd Date: 2024-11-25

Available Online: 2025-06-07

Publish Date: 2025-03-01

Abstract

Abstract

In order to develop a kind of high-efficient stabilizing and solidifying compound agent for treating arsenic residue， the arsenic residue of Kunming Jinshui Copper Smelting Company was taken as the research object. Cement， lime， dolomite（BYS）， polymerized ferric sulfate（PFS），oxidizing agent and coagulant were selected to make the compound reagent and study its stabilization and solidification performances on arsenic slag， and the optimum proportion of stabilizing agent was found by analyzing the leaching performance and compressive strength of the solidified body. And then the enlargement test and economic benefit analysis were carried out. The results showed that the compressive strength of the arsenic slag solidified body was 8 to 10 MPa after curing for 14 days， meeting the requirements of hazardous waste transfer， transportation and safe landfill disposal； arsenic leaching concentration was 0.719 mg/L， pH value was 9.74， and the leaching indexes met the requirements of Identification Standard for Hazardous Wastes-Identification for Extraction Toxicity（GB 5085.3—2007） and Standard for Pollution control on the Hazardous Waste Landfill（GB 18598—2019）. Through the analysis of stabilization and curing effects and economic benefits， we found that the use of dolomitic sand as medicament additive material could not only enhance the hydration and the compactness of the curing body， but also reduce its capacity-increase ratio. By using the techonlogy in this paper， the treatment effect of arsenic-containing hazardous waste slag could meet the requirements， and the production cost could also be reduced to create better economic benefits for hazardous waste disposal enterprises.
- arsenic residue,
- dolomitic sand,
- efficient recombination,
- stabilize and solidify,
- capacity-increase ratio,
- mineral state arsenic

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References(35)

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