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 ›› 2026, Vol. 58 ›› Issue (2): 100-107.doi: 10.19964/j.issn.1006-4990.2025-0039

• 化工分析与监测 • 上一篇    下一篇

铝工业危废中氟元素分析方法研究

刘应谆(), 杨昇(), 范阳阳, 梁学民   

  1. 郑州大学材料科学与工程学院,河南 郑州 450001
  • 收稿日期:2025-01-20 出版日期:2026-02-10 发布日期:2026-03-12
  • 通讯作者: 杨昇(1970— ),男,博士,正高级工程师,研究方向为固废资源化新技术;E-mail:Samsenyang@zzu.edu.cn
  • 作者简介:刘应谆(2000— ),男,硕士研究生,研究方向为固废资源化新技术;E-mail:a1435024201@163.com

Study on analytical method of fluorine element in hazardous waste of aluminum industry

LIU Yingzhun(), YANG Sheng(), FAN Yangyang, LIANG Xuemin   

  1. College of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450001,China
  • Received:2025-01-20 Published:2026-02-10 Online:2026-03-12

摘要:

当前,针对溶液中氟离子质量浓度的主流测定手段是氟离子计法,此法因操作简便、快捷、准确性高等优点而被普遍采用;但将其直接应用于测定铝工业危废处理过程中产生的成分复杂的含氟溶液时,准确度会大幅降低。为提高测量精度,以配制的标准含氟溶液为研究对象,研究总离子强度调节缓冲液(TISAB)对分析结果的影响。研究发现,适宜的TISAB添加量受溶液中氟和铝离子浓度的影响。溶液中不含与氟络合的离子时,可按取样溶液与TISAB体积比为1∶0.5进行初测,根据初测结果再参考不同氟离子浓度与TISAB最佳体积比的规律调整正式测定的比例。溶液中含铝等能与氟络合的离子时,需在测定前分析铝离子浓度并确定TISAB添加量。对铝离子质量浓度高于120.0 mg/L的溶液,可将铝离子质量浓度稀释至120.0 mg/L,并选择取样溶液与TISAB体积比为1∶1进行测量。若铝离子质量浓度较高而氟离子质量浓度较低,不适合过度稀释,则可稀释铝离子质量浓度至240.0 mg/L,并将取样溶液与TISAB的体积比设定为1:2进行测量,此时需在测试结果上加4.50%的正偏差。此方法能在复杂含氟溶液的测量中,将误差控制在2.00%以内,这可为其他复杂成分含氟溶液的准确测量提供参考。

关键词: 铝工业含氟危废, 氟元素分析, 总离子强度调节缓冲液

Abstract:

At present,the mainstream method for determining the mass concentration of fluoride ions in solutions is the fluoride ion selective electrode method,which is widely recognized for its advantages of simple operation,rapidity and high accuracy.However,when it is directly applied to the fluorine-containing solution with complex components produced during the treatment of hazardous waste in the aluminum industry,the accuracy will be greatly reduced.In order to improve the measurement accuracy,the prepared standard fluorine-containing solution was used as the research object to study the influence of the total ionic strength adjustment buffer(TISAB) on the analysis results. It was found that the appropriate dosage of TISAB was influenced by the concentrations of fluoride and aluminum ions in the solution.For solutions free of ions that could complex with fluoride,the volume ratio of the sample solution to TISAB could be set at 1∶0.5 for the preliminary test.Based on the preliminary test results,the ratio for the formal measurement could be adjusted by referring to the rule of the optimal volume ratio of different fluoride ion concentrations to TISAB.For solutions containing ions such as aluminum that could form complexes with fluoride,it was necessary to analyze the aluminum ion concentration and determine the dosage of TISAB to be added prior to the measurement.For solutions with an aluminum ion mass concentration higher than 120.0 mg/L,the aluminum ion mass concentration could be diluted to 120.0 mg/L,and the measurement could be performed with the volume ratio of the sample solution to TISAB of 1∶1.If the aluminum ion concentration was high while the fluoride ion concentration was too low,making excessive dilution inappropriate,the aluminum ion mass concentration could be diluted to 240.0 mg/L and the volume ratio of the sample solution to TISAB could be set to 1∶2,with a positive deviation of 4.50% added to the measured results.This method could control the error within 2.00% in the measurement of complex fluorine-containing solutions,and it provided a reference for the accurate determination of other fluorine-containing solutions with complex components.

Key words: fluoride-containing hazardous waste in aluminum industry, fluorine element analysis, total ionic strength adjustment buffer

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