无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2024, Vol. 56 ›› Issue (8): 92-98.doi: 10.19964/j.issn.1006-4990.2023-0611

• 环境·健康·安全 • 上一篇    下一篇

镁渣固定磷石膏中可溶磷的基础研究

孙岚1(), 谌世英2(), 杨柳絮1, 牛依明1, 赵澳楠1   

  1. 1.河南理工大学资源环境学院,河南 焦作 454000
    2.河南省煤炭绿色转化 重点实验室(河南理工大学),河南 焦作 454000
  • 收稿日期:2023-12-17 出版日期:2024-08-10 发布日期:2024-09-26
  • 通讯作者: 谌世英(1980— ),男,副教授,硕士生导师;E-mail:chensy@hpu.edu.cn
  • 作者简介:孙岚(1998— ),女,硕士研究生,研究方向为固体废物资源化利用;E-mail:850704811@qq.com
  • 基金资助:
    快硬复合灌浆材料的制备及性能研究项目(15210702)

Basic study on fixing soluble phosphorus in phosphogypsum with magnesium slag

SUN Lan1(), CHEN Shiying2(), YANG Liuxu1, NIU Yiming1, ZHAO Aonan1   

  1. 1.Institute of Resources and Environment,Henan Polytechnic University,Jiaozuo 454000,China
    2.Henan KeyLaboratory of Coal Green Conversion(Henan Polytechnic University),Jiaozuo 454000,China
  • Received:2023-12-17 Published:2024-08-10 Online:2024-09-26

摘要:

为了降低磷石膏中可溶性磷对其工程应用的影响,分别以镁渣、镁渣-磷酸二氢钾为固化剂对磷石膏中的可溶磷进行固化,探究镁渣、镁渣-磷酸二氢钾用量对磷石膏中可溶磷固定效果的影响。通过紫外-可见分光光度计法、培养微生物法评价可溶磷的固定效果,采用扫描电镜观察两种体系产物的微观形貌。结果表明:镁渣的加入能够有效固定磷石膏中的可溶磷;当镁渣质量分数为15%、磷酸二氢钾质量分数为5%时固磷效果较优,固定率为30.00%,该浓度下培养的大肠杆菌个数比原状磷石膏培养的大肠杆菌个数少54.49%,磷石膏中可溶磷转化为圆柱状的磷酸镁和板块状的磷酸钾镁。该研究方法固定了磷石膏中的可溶磷并将其转化为具有胶凝性的磷酸镁和磷酸钾镁,为磷石膏的直接利用提供了新途径。

关键词: 磷石膏, 镁渣, 磷酸二氢钾, 可溶磷, 固定

Abstract:

In order to reduce the influence of soluble phosphorus in phosphogypsum on its engineering application,soluble phosphorus in phosphogypsum was cured by using magnesium slag and magnesium slag⁃potassium dihydrogen phosphate as the curing agent,respectively,and the influence of magnesium slag dosage and magnesium slag⁃potassium dihydrogen phosphate dosage on the fixation effect of soluble phosphorus in phosphogypsum was explored.The fixation effect of soluble phosphorus was evaluated using ultraviolet⁃visible spectrophotometry and microbial cultivation methods,and the microscopic morphology of the products in both systems was observed using scanning electron microscopy.The experimental results showed that the addition of magnesium slag could effectively fix soluble phosphorus in phosphogypsum.The effect of phosphorus fixation was better when the addition of magnesium dregs was 15% and the addition of potassium dihydrogen phosphate was 5%,the fixation rate was 30.00%,the number of E.coli cultured in this concentration was 54.49% less than that cultured in the original phosphogypsum,and the soluble phosphorus in the phosphogypsum was transformed into magnesium phosphates in the form of cylindrical and potassium magnesium phosphates in the form of slabs.The method fixed soluble phosphorus in phosphogypsum and converted it into gelling magnesium phosphate and potassium magnesium phosphate,which provided a new way for the direct utilization of phosphogypsum.

Key words: phosphogypsum, magnesium slag, potassium dihydrogen phosphate, soluble phosphorus, immobilization

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