Hydrogen Peroxide Activated by Biochar-Supported Sulfidated Nano Zerovalent Iron for Removal of Sulfamethazine: Response Surface Method Approach

Tiao Zhang, Cui Hu, Qian Li, Chuxin Chen, Jianhui Hu, Xiaoyu Xiao (), Mi Li, Xiaoming Zou and Liangliang Huang ()
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Tiao Zhang: College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China
Cui Hu: Key Laboratory of Agricultural Environmental Pollution Prevention and Control in Red Soil Hilly Region of Jiangxi Province, School of Life Science, Jinggangshan University, Ji’an 343009, China
Qian Li: Key Laboratory of Agricultural Environmental Pollution Prevention and Control in Red Soil Hilly Region of Jiangxi Province, School of Life Science, Jinggangshan University, Ji’an 343009, China
Chuxin Chen: Key Laboratory of Agricultural Environmental Pollution Prevention and Control in Red Soil Hilly Region of Jiangxi Province, School of Life Science, Jinggangshan University, Ji’an 343009, China
Jianhui Hu: Key Laboratory of Agricultural Environmental Pollution Prevention and Control in Red Soil Hilly Region of Jiangxi Province, School of Life Science, Jinggangshan University, Ji’an 343009, China
Xiaoyu Xiao: Key Laboratory of Agricultural Environmental Pollution Prevention and Control in Red Soil Hilly Region of Jiangxi Province, School of Life Science, Jinggangshan University, Ji’an 343009, China
Mi Li: Key Laboratory of Agricultural Environmental Pollution Prevention and Control in Red Soil Hilly Region of Jiangxi Province, School of Life Science, Jinggangshan University, Ji’an 343009, China
Xiaoming Zou: Key Laboratory of Agricultural Environmental Pollution Prevention and Control in Red Soil Hilly Region of Jiangxi Province, School of Life Science, Jinggangshan University, Ji’an 343009, China
Liangliang Huang: College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China

IJERPH, 2022, vol. 19, issue 16, 1-12

Abstract: Biochar (BC)-supported sulfide-modified nanoscale zerovalent iron (S-nZVI/BC) was prepared using the liquid-phase reduction method for the application of the removal of sulfamethazine (SMZ) from water. The reaction conditions were optimized by the Box–Behnken response surface method (RSM). A model was constructed based on the influence factors of the removal rate, i.e., the carbon-to-iron ratio (C/Fe), iron-sulfur ratio (Fe/S), pH, and hydrogen peroxide (H 2 O 2 ) concentration, and the influence of each factor on the removal efficiency was investigated. The optimal removal process parameters were determined based on theoretical and experimental results. The results showed that the removal efficiency was significantly affected by the C/Fe ratio and pH ( p < 0.0001) but relatively weakly affected by the Fe/S ratio ( p = 0.0973) and H 2 O 2 concentration ( p = 0.022). The optimal removal process parameters were as follows: 0.1 mol/L H 2 O 2 , a pH of 3.18, a C/Fe ratio of 0.411, and a Fe/S ratio of 59.75. The removal rate of SMZ by S-nZVI/BC was 100% under these conditions. Therefore, it is feasible to use the Box–Behnken RSM to optimize the removal of emerging pollutants in water bodies by S-nZVI/BC.

Keywords: response surface optimization; biochar-supported sulfide-modified nanoscale zerovalent iron; sulfamethazine; Box–Behnken design (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2022
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