Characterization of Coprecipitates of As(III) and Fe(II) in the Presence of Phyllosilicate Nanoparticles

Characterization of Coprecipitates of As(III) and Fe(II) in the Presence of Phyllosilicate Nanoparticles
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页硅酸盐纳米颗粒存在下 As(III) 和 Fe(II) 共沉淀物的表征

DOI:
10.1007/s00128-020-02973-z
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发表时间:
2020-08
影响因子:
2.7
通讯作者:
Weijun Zhou
Weijun Zhou
中科院分区:
环境科学与生态学4区
文献类型:
--
作者:
Hao-Jie Cui;Hongzheng Wang;Cong Wu;Xiaoqing Wei;Wenjuan Liao;Weijun Zhou

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层状硅酸盐纳米颗粒由于具有较高的迁移性和活性,在调节水稻土中Fe(II)和As(III)的生态地球化学过程中发挥着重要作用。在目前的工作中,两种不同尺寸的白云母纳米粒子(LNPs和SNPs)被用来研究层状硅酸盐纳米粒子的尺寸对Fe(II)和As(III)的共沉淀在氧化过程中的影响。结果表明,白云母纳米粒子能显著促进共沉淀过程中Fe(II)和As(III)的去除。晶体氧化铁的形成和As(III)的氧化倾向于被两种白云母纳米颗粒抑制,并且抑制随着白云母纳米颗粒尺寸的减小而增加。本研究结果有助于理解天然层状硅酸盐纳米颗粒对污染水稻土中Fe和As元素生态地球化学过程的调控作用。
Phyllosilicate nanoparticles play an important role in regulating the biogeochemical processes of Fe(II) and As(III) in paddy soils due to their high mobility and activity. In the present work, two prepared muscovite nanoparticles with different sizes (LNPs and SNPs) were used to investigate the effect of the size of phyllosilicate nanoparticles on the coprecipitation of Fe(II) and As(III) during oxidation process. The results showed that muscovite nanoparticles could significantly promote the removal of Fe(II) and As(III) during coprecipitation process. The formation of crystalline iron oxide and oxidation of As(III) tended to be suppressed by the two muscovite nanoparticles, and the suppression increased as muscovite nanoparticle size decrease. The findings of this study provide a contribution to understanding the roles of the natural phyllosilicate nanoparticles in regulating the biogeochemical processes of Fe and As elements in polluted paddy soils.
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