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光驱动的均先进氧化与吸附过程相结合,有效地从饮用水中去除

Anna Melnikova¹, Antonio Faggiano², Marco Visconti²

¹Department of Environmental Health & Safety, Ufa University of Science and Technology, Zaki Validi 32, 450076, Ufa, Republic of Bashkortostan, Russian Federation.

Journal of environmental management

|November 17, 2023

概括

这项研究研究了先进的氧化过程,将有毒 (As) (III) 转化为不那么有毒的 (As) (V),然后进行吸附去除. 紫外线/NaOCl工艺与ZnAl-LDH吸附相结合,有效地从饮用水中去除了.

科学领域:

环境化学环境化学
水处理技术水处理技术
先进的氧化过程先进的氧化过程

背景情况:

饮用水中的 (As) 对人类健康构成重大风险,特别是有毒且难以清除的 (As).
与As(III) 相比,As(V) 毒性较小,更容易通过吸附去除.

研究的目的:

评估同质的光驱先进氧化过程 (HP-AOPs),特别是UVC/H2O2和UVC/NaOCl,用于氧化As (III) 到As (V).
评估各种吸附剂对后续As(V) 清除的有效性.
确定饮用水中治理的最佳组合工艺.

主要方法:

研究的UVC/H2O2和UVC/NaOCl对于在0.1mg/L的初始度下将酸III氧化为酸V.
经过测试的商业吸附剂 (γ-Al2O3,氧化物E33,MgAl-LDHs,ZnAl-LDHs) 用于去除.
使用响应表面方法 (RSM) 优化了工艺条件,并在真实饮用水中进行了验证.

主要成果:

紫外线/H2O2和紫外线/NaOCl都实现了99%的去除,显著超过单独的H2O2或NaOCl.
紫外线/NaOCl显示了氧化效率,氧化剂剂量和治疗时间的良好平衡.
在蒸和真正的饮用水中,ZnAl-LDH表现出最高的As(V) 清除效率 (88%).

结论:

紫外线/NaOCl工艺对于氧化 (III) 到 (V) 是非常有效的.
ZnAl-LDH是一种优质的吸附剂,可以从经过处理的水中去除As(V).
紫外线/NaOCl高级氧化和ZnAl-LDH吸附的组合是从饮用水中去除的最佳策略.

关键词:

先进的氧化过程具有先进的氧化过程.饮用水饮用水饮用水重金属是一种重金属.紫外线/ (UVC/H) 2O2 紫外线/NaOCl 的影响.

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