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Pd–In bimetallic nanoparticles supported on chelating resin for nitrate removal from water: high efficiency and low NH4+ selectivity
Environmental Science: Water Research & Technology ( IF 3.5 ) Pub Date : 2021-4-16 , DOI: 10.1039/d1ew00028d Zhanhui Shen 1 , Gege Peng 1 , Ya Gao 1 , Jialu Shi 1, 2
Environmental Science: Water Research & Technology ( IF 3.5 ) Pub Date : 2021-4-16 , DOI: 10.1039/d1ew00028d Zhanhui Shen 1 , Gege Peng 1 , Ya Gao 1 , Jialu Shi 1, 2
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Nitrate pollution in groundwater and surface water is a worldwide challenge. Reduction of nitrate to nitrogen gas according to electrocatalysis or hydrogenation catalysis is a prospective way to remove nitrate from water. A Pd/In bimetallic catalyst supported on chelating resin was prepared by a chemical reduction method in aqueous solution. SEM-EDS, TEM, XRD and XPS analyses revealed that the Pd/In nanoparticles with particle sizes ranging from 10 nm to 200 nm showed a uniform distribution in resin. The prepared M-Pd/In composites showed high nitrate removal efficiency (96%) and low NH4+ selectivity (<2%) when the initial concentration of NO3−-N was 100 mg N per L. The coexisting anion, organic matter and initial pH value showed little influence on the nitrate removal ability of the prepared M-Pd/In composites. Hads and NaBH4 could be stored during the preparation process of the Pd/In bimetallic composites, and acted as reducing agents in the nitrate removal process. The prepared M-Pd/In composites showed good nitrate removal ability after recycling 5 times. When they were used to treat actual wastewater, nearly all of the nitrate, nitrite and ammonium were removed from municipal WWTP effluent.
中文翻译：
Pd–负载在螯合树脂上的双金属纳米颗粒，用于从水中去除硝酸盐：高效且NH4 +选择性低
地下水和地表水中的硝酸盐污染是一项全球性挑战。根据电催化或氢化催化将硝酸盐还原为氮气是从水中去除硝酸盐的一种预期方法。通过化学还原法在水溶液中制备负载在螯合树脂上的Pd / In双金属催化剂。SEM-EDS，TEM，XRD和XPS分析表明，粒径在10 nm至200 nm范围内的Pd / In纳米粒子在树脂中分布均匀。当初始浓度为NO 3-时，制备的M-Pd / In复合材料显示出较高的硝酸盐去除效率（96％）和较低的NH 4 +选择性（<2％）。-N为每L 100 mgN。共存阴离子，有机物和初始pH值对制备的M-Pd / In复合材料的硝酸盐去除能力影响很小。H ads和NaBH 4可以在Pd / In双金属复合材料的制备过程中存储，并在硝酸盐去除过程中用作还原剂。制备的M-Pd / In复合材料经5次循环后显示出良好的硝酸盐去除能力。当将它们用于处理实际废水时，几乎从市政污水处理厂废水中除去了所有硝酸盐，亚硝酸盐和铵。
更新日期：2021-04-30
中文翻译：
Pd–负载在螯合树脂上的双金属纳米颗粒，用于从水中去除硝酸盐：高效且NH4 +选择性低
地下水和地表水中的硝酸盐污染是一项全球性挑战。根据电催化或氢化催化将硝酸盐还原为氮气是从水中去除硝酸盐的一种预期方法。通过化学还原法在水溶液中制备负载在螯合树脂上的Pd / In双金属催化剂。SEM-EDS，TEM，XRD和XPS分析表明，粒径在10 nm至200 nm范围内的Pd / In纳米粒子在树脂中分布均匀。当初始浓度为NO 3-时，制备的M-Pd / In复合材料显示出较高的硝酸盐去除效率（96％）和较低的NH 4 +选择性（<2％）。-N为每L 100 mgN。共存阴离子，有机物和初始pH值对制备的M-Pd / In复合材料的硝酸盐去除能力影响很小。H ads和NaBH 4可以在Pd / In双金属复合材料的制备过程中存储，并在硝酸盐去除过程中用作还原剂。制备的M-Pd / In复合材料经5次循环后显示出良好的硝酸盐去除能力。当将它们用于处理实际废水时，几乎从市政污水处理厂废水中除去了所有硝酸盐，亚硝酸盐和铵。
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