Utilization of Electroplating Sludge as Subgrade Backfill Materials: Mechanical and Environmental Risk Evaluation
Utilization of Electroplating Sludge as Subgrade Backfill Materials: Mechanical and Environmental Risk Evaluation
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电镀污泥作为路基回填材料的利用：机械和环境风险评价
DOI：
10.1155/2018/4891418
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发表时间：
2018-10
影响因子：
1.8
通讯作者：
Qiang Tang
中科院分区：
文献类型：
--
作者：
Yu Zhang;Peixin Shi;Lijuan Chen;Qiang Tang
电镀污泥如不进行安全处理，可能对人体健康和周围环境造成严重威胁。通过评价水泥粉煤灰固化污泥的力学性能和环境风险，探讨了电镀污泥作为路基回填材料的可行性。在这项研究中，波特兰水泥和粉煤灰用于固化/稳定污泥。固化7、14和28天后，稳定/固化污泥样本接受了一系列机械、浸出和微观测试。研究发现，除含水量外，抗压强度随着水泥用量、养护时间以及粉煤灰替代水泥的增加而增加。其中，含水量对抗压强度的影响最为显着。结果发现，当含水量从0%增加到10%时，抗压强度下降了87.1%。此外，浸出试验表明，重金属浸出量均在标准限量范围内。这些结果表明，在路基回填材料中利用电镀污泥可以为电镀污泥的处理提供一种替代方案。
The electroplating sludge may pose serious threat to human health and surrounding environment without safe treatment. This paper investigated the feasibility of using electroplating sludge as subgrade backfill materials, by evaluating the mechanical properties and environmental risk of the cement-coal fly ash solidified sludge. In this study, Portland cement and coal fly ash are used to solidify/stabilize the sludge. After curing for 7, 14, and 28 days, the stabilization/solidification sludge specimens were subject to a series of mechanical, leaching, and microcosmic tests. It was found that the compressive strength increased with the increase of cement content, curing time, and the cement replacement by coal fly ash besides water content. Among these factors, the impact of water content on the compressive strength is most noticeable. It was observed that the compressive strength declined by 87.1% when the water content increased from 0% to 10%. Besides, leaching tests showed that the amount of leaching heavy metals were under the standard limit. These results demonstrated utilization of electroplating sludge in subgrade backfill material may provide an alternative for the treatment of electroplating sludge.
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