SOLIDIFICATION/STABILIZATION OF HEAVY METAL CONTAMINATED SEDIMENT BY COMPOUD MATERIALS

YE Chun-mei; WU Jian-qiang; HUANG Shen-fa; SHA Chen-yan; XU Zhi-hao; WANG Jing; ZHOU Dong; SUN Hai-tong; HAN Li-ming

doi:10.13205/j.hjgc.202008021

Volume 38 Issue 8

Nov. 2020

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2020 > 38(8): 125-130,51

YE Chun-mei, WU Jian-qiang, HUANG Shen-fa, SHA Chen-yan, XU Zhi-hao, WANG Jing, ZHOU Dong, SUN Hai-tong, HAN Li-ming. SOLIDIFICATION/STABILIZATION OF HEAVY METAL CONTAMINATED SEDIMENT BY COMPOUD MATERIALS[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(8): 125-130,51. doi: 10.13205/j.hjgc.202008021

Citation:

YE Chun-mei, WU Jian-qiang, HUANG Shen-fa, SHA Chen-yan, XU Zhi-hao, WANG Jing, ZHOU Dong, SUN Hai-tong, HAN Li-ming. SOLIDIFICATION/STABILIZATION OF HEAVY METAL CONTAMINATED SEDIMENT BY COMPOUD MATERIALS[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(8): 125-130,51. doi: 10.13205/j.hjgc.202008021

Citation:

YE Chun-mei, WU Jian-qiang, HUANG Shen-fa, SHA Chen-yan, XU Zhi-hao, WANG Jing, ZHOU Dong, SUN Hai-tong, HAN Li-ming. SOLIDIFICATION/STABILIZATION OF HEAVY METAL CONTAMINATED SEDIMENT BY COMPOUD MATERIALS[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(8): 125-130,51. doi: 10.13205/j.hjgc.202008021

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SOLIDIFICATION/STABILIZATION OF HEAVY METAL CONTAMINATED SEDIMENT BY COMPOUD MATERIALS

doi: 10.13205/j.hjgc.202008021

1. School of Environmental Science and Engineering, Donghua University, Shanghai 201620, China;
2. Shanghai Academy of Environmental Science, Shanghai 200233, China;
3. Shanghai Shenrong Environmental Protection Equipment Co., Ltd, Shanghai 200032, China

Received Date: 2019-05-24

Abstract

Abstract

A compound materials (FP) with a combination of Portland cement and efficient heavy metal stabilization material was used to solidify and stabilize river sediment containing heavy metals. In this paper, we set three FP dosages of 10%, 20%, 30%, three curing times of 7, 28, 42 d, and selected Portland cement as the control (CK). The compressive strength and leaching concentration were selected as indicators to test the solidifying and stabilizing effect of FP. The results showed that compared to the direct leaching of sediment, the leaching concentration of As in the sediment was reduced by more than 93%, that of Pb was reduced by 82.5%~97.68% under different FP dosages after 28 days. The leaching concentration of Cu and Zn reached the lowest value when the FP dosage was 30% and curing time was 42 days, which were 60.97% and 89.07% lower than the direct leaching of the sediment, respectively. Under different treatments, the leaching concentration of Cu and As in FP group was all significantly lower than that in CK (P<0.01); that of Zn in FP group was significantly lower than in CK after 42 days under 30% FP dosage (P<0.05). With the dosage of FP or the curing time increased, compressive strength of the solidified products was also significantly enhanced (P<0.05). Compressive strength of the solidified products of FP was significantly higher than that of CK (P<0.05) after 42 days, and when the dosage of FP increased to 30%, the compressive strength reached 2.1 MPa.
- contaminated sediment,
- heavy metal,
- solidification and stabilization,
- leaching concentration,
- compressive strength

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References(33)

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