成官文;张燎;韦桥权;张宇玲;徐敏;徐晓宇;岳远隋;

• 1:桂林理工大学广西环境污染控制理论与技术重点试验室

摘要(Abstract)：

为开展赤泥土壤化处置研究,采用 Fe Cl_3进行赤泥控碱。 研究表明,FeCl_3对赤泥具有一定的控碱效果,但赤泥 p H值的变化滞后于碱性阴离子质量比的变化。 Fe Cl_3赤泥控碱符合二级动力学过程,主要通过 Fe^{(3 +)}与 OH(3 +)与 OH^-、CO_3-、CO_3² 2 ^-进行化学反应而带动其他次一级化学反应共同实现,与 Fe-进行化学反应而带动其他次一级化学反应共同实现,与 Fe^{(3 +)}同体系内的碱性阴离子 OH(3 +)同体系内的碱性阴离子 OH^-、CO_3-、CO_3² 2 ^-、HCO_3-、HCO_3^-和 Al O_2-和 Al O_2^-反应平衡有关,并通过陈化时间的增加促使赤泥盐分向化学结合碱转化。 投加 3 g/ kg Fe Cl_3赤泥控碱,陈化 120 d 时,游离碱、CO_3-反应平衡有关,并通过陈化时间的增加促使赤泥盐分向化学结合碱转化。 投加 3 g/ kg Fe Cl_3赤泥控碱,陈化 120 d 时,游离碱、CO_3² 2 ^-、AlO_2-、AlO_2^-和 OH-和 OH^-去除率均在 50% 及以上,且对 OH-去除率均在 50% 及以上,且对 OH^-的去除效果较好,达到 60% ;电导率仅增大 0. 16 m S/ cm,盐分以 Na Cl 为主,矿相总量增加 12. 9% ,形成较大的难溶性颗粒,从而实现赤泥控碱。

关键词(KeyWords)： 环境工程学;赤泥;FeCl_3;控碱;离子效应;土壤化处置

Abstract:

Keywords:

基金项目(Foundation): 中国铝业股份有限公司科技攻关项目(gxzz201903);; 广西重点研发计划项目(桂科AB20297039)

作者(Authors): 成官文;张燎;韦桥权;张宇玲;徐敏;徐晓宇;岳远隋;

DOI: 10.13637/j.issn.1009-6094.2021.0244

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