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垃圾焚烧飞灰中Cd、Pb、Zn的螯合稳定与水泥固化处理

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郝玉, 徐宏勇, 柏舸, 王禕天, 陈橙, 王雄, 蔡兰坤. 垃圾焚烧飞灰中Cd、Pb、Zn的螯合稳定与水泥固化处理[J]. 环境工程学报, 2018, 12(8): 2357-2362. doi: 10.12030/j.cjee.201803036
引用本文: 郝玉, 徐宏勇, 柏舸, 王禕天, 陈橙, 王雄, 蔡兰坤. 垃圾焚烧飞灰中Cd、Pb、Zn的螯合稳定与水泥固化处理[J]. 环境工程学报, 2018, 12(8): 2357-2362. doi: 10.12030/j.cjee.201803036
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HAO Yu, XU Hongyong, BAI Ge, WANG Yitian, CHEN Cheng, WANG Xiong, CAI Lankun. Stabilization/solidification of Cd, Pb and Zn in municipal solid waste incineration (MSWI) fly ash with chelating agent and cement[J]. Chinese Journal of Environmental Engineering, 2018, 12(8): 2357-2362. doi: 10.12030/j.cjee.201803036
Citation: HAO Yu, XU Hongyong, BAI Ge, WANG Yitian, CHEN Cheng, WANG Xiong, CAI Lankun. Stabilization/solidification of Cd, Pb and Zn in municipal solid waste incineration (MSWI) fly ash with chelating agent and cement[J]. Chinese Journal of Environmental Engineering, 2018, 12(8): 2357-2362. doi: 10.12030/j.cjee.201803036
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垃圾焚烧飞灰中Cd、Pb、Zn的螯合稳定与水泥固化处理

  • 1.

    华东理工大学资源与环境工程学院，上海 200237

  • 基金项目:

Stabilization/solidification of Cd, Pb and Zn in municipal solid waste incineration (MSWI) fly ash with chelating agent and cement

  • 1.

    School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China

  • Fund Project:

  • 摘要: 采用有机硫稳定剂 (DTCR) 与水泥对城市垃圾焚烧飞灰进行稳定/固化处理，研究了飞灰中Cd、Pb、Zn的浸出毒性和固化体的抗压强度，比较了螯合稳定与水泥固化对Cd、Pb、Zn的处理效果、养护时间对固化体抗压强度的影响，并对飞灰的结构形貌进行了分析。结果表明，在稳定固化过程中飞灰中发生了复杂的螯合、水化反应，重金属形态由不稳定态向稳定态转变，螯合稳定对Cd的处理效果最好，水泥固化更适用于Pb、Zn。固化时间大于7 d后，飞灰中的重金属以及固化体的抗压强度已较为稳定。螯合稳定协同水泥固化的处理效果优于单一的稳定或固化方法，飞灰在固化7 d后可同时达到重金属浸出毒性和抗压强度标准，满足安全填埋要求。
    Abstract: Dithiocarbamate (DTCR) and cement were used to stabilize and solidify municipal solid waste incineration (MSWI) fly ash. Experiments were conducted to investigate the compressive strength of the solidified body and the leaching toxicity of Cd, Pb, Zn. The effect of curing time on solidified body compressive strength and the structure morphology of fly ash were also analyzed. The results showed that complex chelation and hydration reaction occurred during the stabilization/solidification process and that chemical states of heavy metals converted from unstable to stable forms. The stabilization using chelating agent is better for Cd while the solidification using cement is more suitable for Pb and Zn. The compressive strength of the solidified body cured after 7 d have been stable while the leaching toxicity of heavy metals is negligible. The effect of cement admixed chelating agent stabilization/solidification is superior to a stabilization/solidification using the only cement or chelating agent. The solidified body cured after 7 d meets the criteria of leaching toxicity of heavy metals and compressive strength during the security landfill.
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  • 刊出日期:  2018-08-17

垃圾焚烧飞灰中Cd、Pb、Zn的螯合稳定与水泥固化处理

  • 1. 华东理工大学资源与环境工程学院，上海 200237
基金项目:

摘要: 采用有机硫稳定剂 (DTCR) 与水泥对城市垃圾焚烧飞灰进行稳定/固化处理，研究了飞灰中Cd、Pb、Zn的浸出毒性和固化体的抗压强度，比较了螯合稳定与水泥固化对Cd、Pb、Zn的处理效果、养护时间对固化体抗压强度的影响，并对飞灰的结构形貌进行了分析。结果表明，在稳定固化过程中飞灰中发生了复杂的螯合、水化反应，重金属形态由不稳定态向稳定态转变，螯合稳定对Cd的处理效果最好，水泥固化更适用于Pb、Zn。固化时间大于7 d后，飞灰中的重金属以及固化体的抗压强度已较为稳定。螯合稳定协同水泥固化的处理效果优于单一的稳定或固化方法，飞灰在固化7 d后可同时达到重金属浸出毒性和抗压强度标准，满足安全填埋要求。

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