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日用化学工业 ›› 2022, Vol. 52 ›› Issue (6): 606-612.doi: 10.3969/j.issn.1001-1803.2022.06.005

• 开发与应用 • 上一篇    下一篇

磷石膏对黄壤磷吸附性能及吸附动力学分析

宣超1,2,胡昌荣1,2,易芸1,2,刘飞1,2,曹建新1,3,*(),潘红艳1,2,*()   

  1. 1.贵州大学 化学与化工学院,贵州 贵阳 550025
    2.贵州省绿色化工与清洁能源技术重点实验室,贵州 贵阳 550025
    3.贵州省工业废弃物高效利用工程研究中心,贵州 贵阳 550025
  • 收稿日期:2022-03-30 修回日期:2022-05-26 出版日期:2022-06-22 发布日期:2022-06-22
  • 通讯作者: 曹建新,潘红艳
  • 基金资助:
    贵州省科技计划项目(黔科合服企[2018]4011);贵州省科技计划项目(黔科合平台人才[2017]5711);贵州省科技计划项目(黔科合支撑[2021]一般489)

Analysis of phosphorus adsorption performance and adsorption kinetics of phosphogypsum in loess soil

Xuan Chao1,2,Hu Changrong1,2,Yi Yun1,2,Liu Fei1,2,Cao Jianxin1,3,*(),Pan Hongyan1,2,*()   

  1. 1. School of Chemistry and Chemical Engineering, Guizhou University, Guiyang, Guizhou 550025, China
    2. Guizhou Key Laboratory for Green Chemical and Clean Energy Technology, Guiyang, Guizhou 550025, China
    3. Guizhou Provincial Engineering Research Center of Efficient Utilization for Waster, Guiyang, Guizhou 550025, China
  • Received:2022-03-30 Revised:2022-05-26 Online:2022-06-22 Published:2022-06-22
  • Contact: Jianxin Cao,Hongyan Pan

摘要:

研究了磷石膏(PG)对黄壤磷吸附能力的影响,并探讨其影响机制。以贵州省黄壤为研究对象,探索不同掺量的PG在不同培养时间等条件下对黄壤磷吸附性质的影响,并通过吸附动力学实验和数据模型拟合分析了PG对黄壤磷吸附动力学行为的影响。结果表明:PG掺量对黄壤磷吸附量影响显著(P<0.05)。磷吸附量随PG掺量增加呈先增加后降低趋势,掺量为0.5 g/100 g土时达最高值,与原土相比,磷吸附量提高2.80%,pH由3.77升至4.00,无定型氧化铁(Feo)含量上升2.33%;PG掺量分别为0.5 g/100 g土和1.0 g/100 g土的混合土样磷吸附动力学过程符合准一级方程,之后,随掺量增加混合土样磷吸附动力学过程符合准二级方程;磷石膏对黄壤磷吸附能力的影响在前7天最为显著,且磷石膏中Na2SO4、NaH2PO4和CaSO4对黄壤磷吸附能力起促进作用,NaF对黄壤磷吸附能力起抑制作用。

关键词: 磷石膏, 黄壤, 磷吸附, 吸附动力学

Abstract:

The effects of PG on the phosphorus adsorption capacity of loess soil and the influence mechanism therein were investigated to provide some scientific basis for the resource utilization of phosphogypsum (PG) in agriculture. The effects of different PG dosages on the phosphorus adsorption properties and the adsorption kinetics were analyzed in loess soil with different incubation time. The results showed that the dosage of PG had a significant effect on the adsorption of phosphorus in loess soil (P<0.05). The phosphorus adsorption capacity was increased first, and then decreased with the increase of PG addition and reached the highest value at 0.5 g PG/100 g soil. Compared with the original soil, the phosphorus adsorption capacity and the content of amorphous iron oxide (Feo) were increased by 2.80% and 2.33%, respectively, and the pH was increased from 3.77 to 4.00. Moreover, the phosphorus adsorption kinetic process of the mixed soil samples fitted the pseudo-first-order kinetic models with PG content of 0.5 g/100 g soil and 1.0 g/100 g soil, and then fitted the pseudo-second-order kinetic models with the increase of PG content. However, the effect of PG on the phosphorus adsorption capacity of loess soil was most significant in the first 7 days. Na2SO4, NaH2PO4 and CaSO4 released from PG promoted the phosphorus adsorption capacity, while NaF inhibited the phosphorus adsorption capacity of loess soil. The present study shows that the phosphorus adsorption capacity of loess soil can be adjusted by PG dosage.

Key words: phosphogypsum, loess soil, phosphorus adsorption, adsorption kinetics

中图分类号: 

  • TQ424