高炉矿渣-粉煤灰地聚合物胶凝材料固化砷钙渣

doi:10.16085/j.issn.1000-6613.2016-2331

化工进展 ›› 2017, Vol. 36 ›› Issue (07): 2660-2666.DOI: 10.16085/j.issn.1000-6613.2016-2331

高炉矿渣-粉煤灰地聚合物胶凝材料固化砷钙渣

刘守庆^1,4, 罗中秋², 和森², 周新涛^2,3, 贾庆明²

1 昆明理工大学环境科学与工程学院, 云南昆明 650500;
2 昆明理工大学化学工程学院, 云南昆明 650500;
3 昆明理工大学非常规冶金教育部重点实验室, 云南昆明 650093;
4 西南林业大学理学院, 云南昆明 650224

收稿日期:2016-12-14 修回日期:2017-01-06 出版日期:2017-07-05 发布日期:2017-07-05
通讯作者: 罗中秋,博士,讲师,从事固体物资源化利用和危险固体废物安全化处理的研究。
作者简介:刘守庆(1978-),男,博士研究生,研究方向为固体物资源化利用与安全化处理。E-mail:liusq2001_6@126.com。
基金资助:
NSFC-云南联合基金（U1137604）、云铜校企预研基金2015YT08）、昆明理工大学引进人才科研启动基金（KKSY201605021）及昆明理工大学分析测试基金（2016T20160009）项目。

Solidification/stabilization of calcium arsenate waste with blast furnace slag and fly ash geopolymer materials

LIU Shouqing^1,4, LUO Zhongqiu², HE Sen², ZHOU Xintao^2,3, JIA Qingming²

1 Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, Yunnan, China;
2 Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650500, Yunnan, China;
3 Key Laboratory of Unconventional Metallurgy, Ministry of Education, Kunming 650093, Yunnan, China;
4 Faculty of Science, Southwest Forestry University, Kunming 650224, Yunnan, China

Received:2016-12-14 Revised:2017-01-06 Online:2017-07-05 Published:2017-07-05

摘要/Abstract

摘要： 以高炉矿渣、粉煤灰为地聚合物胶凝材料原料，配合复合化学激发剂固化砷钙渣，并采用X射线衍射（XRD）、傅里叶变换红外光谱（FTIR）和扫描电子显微镜（SEM）探究固砷机理。研究结果表明，固化体优选质量配比为高炉矿渣粉：粉煤灰：砷钙渣=4：2：4，配合1.5%~2.0%的NaOH和工业水玻璃复合化学激发剂，固化体砷浸出浓度0.5~0.9mg/L，低于危险废物浸出毒性鉴别标准限值（5mg/L）。XRD、FTIR和SEM结果表明，砷钙渣经高炉矿渣-粉煤灰地聚合物胶凝材料固化，反应体系液相环境pH > 13，促使砷钙渣中的含砷矿物CaHAsO₄·3H₂O向更加稳定的Ca₅（AsO₄）₃OH及类质同象物Ca₅（AsO₄）₃（OH，F）转变。同时地聚合物胶凝材料水化产生的网络状水化凝胶可把砷钙渣中的各组分胶结在一起有效抑制固化体中砷的溶出。可见，高炉矿渣-粉煤灰地聚合物胶凝材料可作为固化含砷渣的一种潜在固结剂。

关键词: 砷钙渣, 地聚合物胶凝材料, 固化, 高炉矿渣, 粉煤灰

Abstract: Blast furnace slag and fly ash were utilized as raw materials for the preparation of geopolymer from industrial wastes.After that,calcium arsenate waste was solidified/immobilized with blast furnace slag and fly ash geopolymer materials as well as addition of compound chemical activators.Moreover,the mechanism for the solidification/stabilization of calcium arsenate waste with blast furnace slag and fly asstandard (i.e.,5mg/L).The results of XRD,FTIR and SEM showed that the sparingly soluble CaHAsO₄·3H₂O transformed into more stable Ca₅(AsO₄)₃OH or the isomorphous Ca₅(AsO₄)₃(OH,F) compounds at the pH of cementitious system over 13 when calcium arsenate waste solidified with blast furnace slag and fly ash geopolymer materials.Meanwhile,the hydration products of blast furnace slag and fly ash geopolymer materials consolidated with other components in the solidified body to form a stable whole,decreasing eventually the arsenic leachability of the solidified sample.Based on these results the blast furnace slag and fly ash geopolymer materials may be considered as a potential material to solidify arsenic-containing wastes.

Key words: calcium arsenate wastes, geopolymer materials, solidification/immobilization, blast furnace slag, fly ash

中图分类号:

X756

刘守庆, 罗中秋, 和森, 周新涛, 贾庆明. 高炉矿渣-粉煤灰地聚合物胶凝材料固化砷钙渣[J]. 化工进展, 2017, 36(07): 2660-2666.

LIU Shouqing, LUO Zhongqiu, HE Sen, ZHOU Xintao, JIA Qingming. Solidification/stabilization of calcium arsenate waste with blast furnace slag and fly ash geopolymer materials[J]. Chemical Industry and Engineering Progress, 2017, 36(07): 2660-2666.

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高炉矿渣-粉煤灰地聚合物胶凝材料固化砷钙渣

Solidification/stabilization of calcium arsenate waste with blast furnace slag and fly ash geopolymer materials

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