Performance of Pd/Sn catalysts supported by chelating resin prestoring reductant for nitrate reduction in actual water

Jialu Shi; Ya Gao; Ling Zang; Zhanhui Shen; Gege Peng

doi:10.1016/j.envres.2021.111577

Performance of Pd/Sn catalysts supported by chelating resin prestoring reductant for nitrate reduction in actual water

Environ Res. 2021 Oct:201:111577. doi: 10.1016/j.envres.2021.111577. Epub 2021 Jul 3.

Authors

Jialu Shi¹, Ya Gao², Ling Zang³, Zhanhui Shen⁴, Gege Peng²

Affiliations

¹ Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, School of Environment, Henan Normal University, 64 East of Construction Road, Xinxiang, 453007, China; State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 163 Xianlin Avenue, Nanjing, 210046, China. Electronic address: shijialu@htu.edu.cn.
² Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, School of Environment, Henan Normal University, 64 East of Construction Road, Xinxiang, 453007, China.
³ Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, School of Environment, Henan Normal University, 64 East of Construction Road, Xinxiang, 453007, China; School of Civil Engineering, Southeast University, Nanjing, 211189, China.
⁴ Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, School of Environment, Henan Normal University, 64 East of Construction Road, Xinxiang, 453007, China; State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 163 Xianlin Avenue, Nanjing, 210046, China.

PMID: 34228952
DOI: 10.1016/j.envres.2021.111577

Abstract

Catalytic hydrogen reduction has appeared as a promising strategy for chemical denitrification with advantages of high activity and simple operation. However, the risk and low utilization of H₂ is the disadvantage of catalytic hydrogen reduction. In recent years, catalytic reduction reactions in the presence of sodium borohydride (NaBH₄) have been extensively studied. NaBH₄ can be used as an electron source to generate electrons on the surface of the catalyst and can catalyze the reduction of pollutants. But it makes commercialization costly and causes significant environmental pollution if widely use NaBH₄. In this study, we prepared supported Pd/Sn bimetallic nanoparticles which could adsorb NaBH₄ during the preparation of the Pd/Sn bimetallic catalyst as the prestoring reductant. No additional reducing agent is required during nitrate reduction process. The performance and mechanism for nitrate reduction by using Pd/Sn bimetallic nanoparticles were discussed. Moreover, the catalyst D-Pd1/Sn1 reached a complete nitrate removal in the municipal wastewater treatment plant effluent water within 3 h. The results provide a prospect for denitrification in biological wastewater treatment plants.

Keywords: Catalytic nitrate reduction; Pd/Sn bimetallic catalyst; Prestore reductant; Sodium borohydride.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Nitrates*
Reducing Agents*
Water

Substances

Nitrates
Reducing Agents
Water