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碱液对填埋场浓缩液中Ca2+、Mg2+的去除效果研究

肖望松 王华伟 孙英杰 宫兆国 王亚楠 付友先 刘克琼 孙治国

肖望松, 王华伟, 孙英杰, 宫兆国, 王亚楠, 付友先, 刘克琼, 孙治国. 碱液对填埋场浓缩液中Ca2+、Mg2+的去除效果研究[J]. 环境工程, 2022, 40(8): 55-61. doi: 10.13205/j.hjgc.202208007
引用本文: 肖望松, 王华伟, 孙英杰, 宫兆国, 王亚楠, 付友先, 刘克琼, 孙治国. 碱液对填埋场浓缩液中Ca2+、Mg2+的去除效果研究[J]. 环境工程, 2022, 40(8): 55-61. doi: 10.13205/j.hjgc.202208007
XIAO Wangsong, WANG Huawei, SUN Yingjie, GONG Zhaoguo, WANG Yanan, FU Youxian, LIU Keqiong, SUN Zhiguo. REMOVAL EFFICIENCY OF Ca2+, Mg2+ FROM CONCENTRATED LEACHATE IN LANDFILL USING NaOH SOLUTION[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(8): 55-61. doi: 10.13205/j.hjgc.202208007
Citation: XIAO Wangsong, WANG Huawei, SUN Yingjie, GONG Zhaoguo, WANG Yanan, FU Youxian, LIU Keqiong, SUN Zhiguo. REMOVAL EFFICIENCY OF Ca2+, Mg2+ FROM CONCENTRATED LEACHATE IN LANDFILL USING NaOH SOLUTION[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(8): 55-61. doi: 10.13205/j.hjgc.202208007

碱液对填埋场浓缩液中Ca2+、Mg2+的去除效果研究

doi: 10.13205/j.hjgc.202208007
基金项目: 

国家自然科学基金资助项目(51908304)

详细信息
    作者简介:

    肖望松(1997-),男,硕士研究生,主要研究方向为固体废物污染控制与资源化

    通讯作者:

    王华伟(1984-),男,副教授,主要研究方向为固体废物污染控制与污染土壤修复技术。wanghuawei210@163.com

REMOVAL EFFICIENCY OF Ca2+, Mg2+ FROM CONCENTRATED LEACHATE IN LANDFILL USING NaOH SOLUTION

  • 摘要: 为了减缓浓缩液蒸发过程设备的腐蚀和结垢问题,研究了碱液及复配药剂对浓缩液中Ca2+、Mg2+的去除率,并利用多种技术手段分析表征了沉淀产物的化学组成和矿物特性,探究了Ca2+、Mg2+的去除对浓缩液水质参数和结垢量的影响。结果表明:1)当7.5 mol/L NaOH溶液投加体积比为3%,反应时间60 min时浓缩液中Ca2+、Mg2+得以有效去除,其去除率分别为89.49%和98.45%,但此条件下沉淀物的沉降性能较差。2)复配实验表明,NaOH溶液与硅藻土、Ca(OH)2复配时,显著提高了沉淀产物的沉降性能,且Ca2+、Mg2+去除率未受到显著影响;添加1% Ca(OH)2时沉降效果最为显著,沉降比降为36.84%,明显低于单独碱液(NaOH)的75.61%。3)对碱液沉淀产物进行化学组成和矿物特性分析可知,沉淀产物主要含有Mg(OH)2、Mg5(CO3)4(OH)2·4H2O、NaCl以及KCl等矿物。4)对浓缩液原液和碱液处理后上清液进行模拟蒸发发现,调节pH至5.0时碱液处理后结垢量低于浓缩液原液。
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出版历程
  • 收稿日期:  2021-09-08
  • 刊出日期:  2022-11-08

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