中华医学超声杂志

应用化学 ›› 2019, Vol. 36 ›› Issue (12): 1462-1464.DOI: 10.11944/j.issn.1000-0518.2019.12.190133

• 研究简报 • 上一篇    

低相对分子质量有机酸对α-FeO(OH)吸附As(Ⅲ)的影响

叶欣a,周惠琼b,蒲金国c,朱霞萍a*()   

  1. a成都理工大学材料与化学化工学院 成都 610059
    b重庆垫江县生态环境监测站 重庆 垫江 408300
    c四川冶金地质研究院 四川 眉山 620010
  • 收稿日期:2019-05-09 接受日期:2019-08-16 出版日期:2019-12-01 发布日期:2019-12-10
  • 通讯作者: 朱霞萍
  • 基金资助:
    川冶局投地调勘查项目资助([2017]130)

Effect of Low Relative Molecular Mass Organic Acids on As(Ⅲ) Adsorption by α-FeO(OH)

YE Xina,ZHOU Huiqiongb,PU Jinguoc,ZHU Xiapinga*()   

  1. aCollege of Materials and Chemistry & Chemical Engineering,Chengdu University of Techology,Chengdu 610059,China;
    bEcological Environment Monitoring Station of Dianjiang,Dianjiang,Chongqing 408300,China
    cSichuan Institute of Metallurgical Geology,Meishan,Sichuan 620010,China
  • Received:2019-05-09 Accepted:2019-08-16 Published:2019-12-01 Online:2019-12-10
  • Contact: ZHU Xiaping
  • Supported by:
    Supported by the Sichuan Bureau of Metalurgical Geology & Explortion(No.[2017]130)

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摘要：

制备并表征了α-FeO(OH),探究了4种低相对分子质量有机酸(LMW)对α-FeO(OH)吸附As(Ⅲ)的影响,并阐明了机理。 单一和混合LMW对α-FeO(OH)吸附As(Ⅲ)均有抑制作用,4种LMW的影响大小顺序为:草酸(OA)>柠檬酸(CA)>乳酸(LA)、水杨酸(SA)。 混合LMW的影响为:OA会加剧CA对α-FeO(OH)吸附As(Ⅲ)的影响,而SA几乎不起作用。 当ρ(As(Ⅲ))较低,LMW通过与α-FeO(OH)的静电引力、与α-FeO(OH)表面的铁离子形成配合物、生成沉淀从而影响α-FeO(OH)对As(Ⅲ)的吸附;当ρ(As(Ⅲ))较高,LMW还通过阻碍As(Ⅲ)在α-FeO(OH)上的扩散和沉淀作用产生影响。 实验结果为土壤中As(Ⅲ)的迁移转化、污染治理提供技术支撑。

关键词: As(Ⅲ), α-FeO(OH), 低相对分子质量有机酸, 吸附

Abstract:

α-FeO(OH) was prepared and characterized. The effects of low relative molecular mass organic acids(LMW) in soils on the adsorption of As(Ⅲ) by α-FeO(OH) were investigated, and the mechanism was elucidated. Single LMW and mixed LMW have inhibitory effect on the adsorption of As(Ⅲ) by α-FeO(OH). The influence order of four LMW on the adsorption of As(Ⅲ) by α-FeO(OH is as follows: oxalic acid (OA)>citric acid (CA)>lactic acid (LA), salicylic acid (SA). The effect of mixed LMW on the adsorption of As(Ⅲ) by α-FeO(OH) is as follows:the OA aggravates the effect of CA on the adsorption of As(Ⅲ) by α-FeO(OH), and addition of SA hardly affects the adsorption of As(Ⅲ) by α-FeO(OH). When the ρ(As(Ⅲ)) is low, the electrostatic attraction of LMW with α-FeO(OH), the formation of complexes with iron ions on the surface of α-FeO(OH), and the formation of precipitates affect the adsorption of As (Ⅲ) by α-FeO(OH). When the ρ(As (Ⅲ)) is high, the LMW affects the diffusion and precipitation of As(Ⅲ). The experimental results provide technical support for the migration, transformation, and pollution control of As(Ⅲ) in soil.

Key words: As(Ⅲ), α-FeO(OH), low molecular mass organic acids, adsorption

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