Membrane and Water Treatment

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Synthesis of Pd/Cu-Fe polymetallic nanoparticles for in situ reductive degradation of p-nitrophenol

  • Wenbin, Zhang (Ecological and Environmental Monitoring Center of Chongqing) ;
  • Lanyu, Liu (Ecological and Environmental Monitoring Center of Chongqing) ;
  • Jin, Zhao (Ecological and Environmental Monitoring Center of Chongqing) ;
  • Fei, Gao (Ecological and Environmental Monitoring Center of Chongqing) ;
  • Jian, Wang (Ecological and Environmental Monitoring Center of Chongqing) ;
  • Liping, Fang (China University of Geosciences)
  • Received : 2021.06.01
  • Accepted : 2022.02.15
  • Published : 2022.03.25
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Abstract

With a small particle size, specific surface area and chemical nature, Pd/Cu-Fe nanocomposites can efficiently remove the organic compounds. In order to understand the applicability for in situ remediation of contaminated groundwater, the degradation of p-nitrophenol by Pd/Cu-Fe nanoparticles was investigated. The degradation results demonstrated that these nanoparticles could effectively degrade p-nitrophenol and near 90% of degradation efficiency was achieved by Pd/Cu-Fe nanocomposites for 120 min treatment. The efficiency of degradation increased significantly when the Pd content increased from 0.05 wt.% and 0.10 wt.% to 0.20 wt.%. Meanwhile, the removal percentage of p-nitrophenol increased from 75.4% and 81.7% to 89.2% within 120 min. Studies on the kinetics of p-nitrophenol that reacts with Pd/Cu-Fe nanocomposites implied that their behaviors followed the pseudo-first-order kinetics. Furthermore, the batch experiment data suggested that some factors, including Pd/Cu-Fe availability, temperature, pH, different ions (SO42-, PO43-, NO3-) and humic acid content in water, also have significant impacts on p-nitrophenol degradation efficiency. The recyclability of the material was evaluated. The results showed that the Pd/Cu-Fe nanoparticles have good recycle performance, and after three cycles, the removal rate of p-nitrophenol is still more than 83%.

Keywords

Acknowledgement

The authors would like to acknowledge the Talent Engagement Fund Program of China University of Geosciences (No. G1323521601) and the National Science Foundation of China (No. 21407131) for their financial supports.

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