Stabilization/solidification and recycling of sediment from Taihu Lake in China : Engineering behavior and environmental impact

Copyright © 2020 Elsevier Ltd. All rights reserved.

Bibliographische Detailangaben
Veröffentlicht in:Waste management (New York, N.Y.). - 1999. - 116(2020) vom: 05. Okt., Seite 1-8
1. Verfasser: Tang, Pan-Pan (VerfasserIn)
Weitere Verfasser: Zhang, Wan-Lu, Chen, Yong-Hui, Chen, Geng, Xu, Jie
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2020
Zugriff auf das übergeordnete Werk:Waste management (New York, N.Y.)
Schlagworte:Journal Article Environmental impact Fill materials Heavy metals Leachability Recycled stabilized sediment Unconfined compressive strength Metals, Heavy
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520 |a Investigations of stabilized/solidified sediment (S/S sediment) by simulated field-construction processes (crushing and filling) are fundamental to evaluating the potential reuse as fill materials. A series of tests were conducted on the samples prepared from S/S sediment grains (SG), which was obtained by crushing the cement treated sediment. By sampling the SG with different field-curing durations (t1: 28, 35, 56 and 98 days) and measuring them by unconfined compressive strength (UCS) tests, the effect of t1 on the UCS was investigated. By continually curing the samples prepared from the SG with 28 field-curing days in laboratory for an additional 7, 28, 35 and 70 days (t2) and subjecting them to UCS and tank leaching tests with different ambient (leachate) pH values (1, 4, 7, 10 and 14), the effect of t2 and ambient pH was evaluated. Increasing t1 and t2 was found to significantly influence the strength of SG, which highlights the importance of an appropriate curing period. The releases of the metals (As, Cr, Cu, Zn, Pb, Ni, and Hg) in the SG exhibited a strongly pH-dependence but less correlation with t2. Neutral conditions (pH = 7) offered the best immobilization capacity for Cu; As, Cr, Ni and Zn exhibited the lowest release at pH = 10; the release of Pb decreased moderately with increasing pH. The S/S sediment complied with the acceptance criteria in terms of metal release and can be regarded as an environmentally friendly fill material. The results highlight the technical feasibility of stabilized sediment recycling in aquatic environment projects 
650 4 |a Journal Article 
650 4 |a Environmental impact 
650 4 |a Fill materials 
650 4 |a Heavy metals 
650 4 |a Leachability 
650 4 |a Recycled stabilized sediment 
650 4 |a Unconfined compressive strength 
650 7 |a Metals, Heavy  |2 NLM 
700 1 |a Zhang, Wan-Lu  |e verfasserin  |4 aut 
700 1 |a Chen, Yong-Hui  |e verfasserin  |4 aut 
700 1 |a Chen, Geng  |e verfasserin  |4 aut 
700 1 |a Xu, Jie  |e verfasserin  |4 aut 
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773 1 8 |g volume:116  |g year:2020  |g day:05  |g month:10  |g pages:1-8 
856 4 0 |u http://dx.doi.org/10.1016/j.wasman.2020.07.040  |3 Volltext 
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