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Bentonite-supported nano zero-valent iron composite as a green catalyst for bisphenol A degradation: Preparation, performance, and mechanism of action.
Journal of Environmental Management ( IF 8.7 ) Pub Date : 2020-01-12 , DOI: 10.1016/j.jenvman.2020.110105
Teng Bao 1 , Mekdimu Mezemir Damtie 2 , Ahmad Hosseinzadeh 3 , Wei Wei 3 , Jie Jin 4 , Hoang Nhat Phong Vo 3 , Jing Song Ye 5 , Yiwen Liu 3 , Xiao Fei Wang 5 , Zhi Min Yu 4 , Zhi Jie Chen 3 , Ke Wu 4 , Ray L Frost 6 , Bing-Jie Ni 3
Affiliation  

Bisphenol A (BPA) is a toxic environmental pollutant commonly found in wastewater. Using non-toxic materials and eco-friendly technology to remove this pollutant from wastewater presents multiple advantages. Treatment of wastewater with clay minerals has received growing interest because of the environment friendliness of these materials. Bentonite is a 2:1 layered phyllosilicate clay mineral that can support nano-metal catalysts. It can prevent the agglomeration of nano-metal catalysts and improve their activity. In this article, a green catalytic nano zero-valent iron/bentonite composite material (NZVI@bentonite) was synthesized via liquid-phase reduction. The average size of NZVI was approximately 40-50 nm. Good dispersion and low aggregation were observed when NZVI was loaded on the surface or embedded into the nanosheets of bentonite. Degradation of BPA, a harmful contaminant widely found in wastewater at relatively high levels, by NZVI@bentonite was then investigated and compared with that by pristine NZVI through batch Fenton-like reaction experiments. Compared with pristine NZVI and bentonite alone, the NZVI@bentonite showed a higher BPA degradation ratio and offered highly effective BPA degradation up to 450 mg/g in wastewater under optimum operating conditions. Adsorption coupled with the Fenton-like reaction was responsible for BPA degradation by NZVI@bentonite. This work extends the application of NZVI@bentonite as an effective green catalyst for BPA degradation in aqueous environments.

中文翻译:

膨润土负载的纳米零价铁复合物作为双酚A降解的绿色催化剂:制备,性能和作用机理。

双酚A(BPA)是一种常见于废水中的有毒环境污染物。使用无毒材料和环保技术从废水中去除这种污染物具有多重优势。由于这些材料的环境友好性,用粘土矿物处理废水已引起越来越多的兴趣。膨润土是一种2:1层状层状硅酸盐粘土矿物,可以负载纳米金属催化剂。它可以防止纳米金属催化剂的团聚并提高其活性。本文通过液相还原合成了绿色催化纳米零价铁/膨润土复合材料(NZVI @膨润土)。NZVI的平均尺寸约为40-50nm。当将NZVI负载在表面或嵌入膨润土的纳米片中时,观察到良好的分散性和低聚集性。然后研究了NZVI @膨润土对BPA(一种在废水中含量较高的有害污染物的广泛发现)的降解,并通过类似Fenton的反应实验将其与原始NZVI进行了比较。与单独的原始NZVI和膨润土相比,NZVI @膨润土在最佳操作条件下显示出更高的BPA降解率,并在废水中提供了高达450 mg / g的高效BPA降解。NZVI @膨润土对双酚A降解的原因是吸附和Fenton样反应。这项工作扩展了NZVI @膨润土作为在水性环境中降解BPA的有效绿色催化剂的应用。然后,通过分批的Fenton类反应实验研究了NZVI @膨润土的,并与原始NZVI的进行了比较。与单独的原始NZVI和膨润土相比,NZVI @膨润土在最佳操作条件下显示出更高的BPA降解率,并在废水中提供了高达450 mg / g的高效BPA降解。NZVI @膨润土对双酚A的降解是吸附和Fenton样反应共同作用的结果。这项工作扩展了NZVI @膨润土作为在水性环境中降解BPA的有效绿色催化剂的应用。然后,通过分批的Fenton类反应实验研究了NZVI @膨润土的,并与原始NZVI的进行了比较。与单独的原始NZVI和膨润土相比,NZVI @膨润土在最佳操作条件下显示出更高的BPA降解率,并在废水中提供了高达450 mg / g的高效BPA降解。NZVI @膨润土对双酚A降解的原因是吸附和Fenton样反应。这项工作扩展了NZVI @膨润土作为在水性环境中降解BPA的有效绿色催化剂的应用。NZVI @膨润土对双酚A降解的原因是吸附和Fenton样反应。这项工作扩展了NZVI @膨润土作为在水性环境中降解BPA的有效绿色催化剂的应用。NZVI @膨润土对双酚A的降解是吸附和Fenton样反应共同作用的结果。这项工作扩展了NZVI @膨润土作为在水性环境中降解BPA的有效绿色催化剂的应用。
更新日期:2020-01-13
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