Peng, H.; Guo, J.; Qiu, H.; Wang, C.; Zhang, C.; Hao, Z.; Rao, Y.; Gong, Y. Efficient Removal of Cr (VI) with Biochar and Optimized Parameters by Response Surface Methodology. Processes 2021, 9, 889, doi:10.3390/pr9050889.
Peng, H.; Guo, J.; Qiu, H.; Wang, C.; Zhang, C.; Hao, Z.; Rao, Y.; Gong, Y. Efficient Removal of Cr (VI) with Biochar and Optimized Parameters by Response Surface Methodology. Processes 2021, 9, 889, doi:10.3390/pr9050889.
Peng, H.; Guo, J.; Qiu, H.; Wang, C.; Zhang, C.; Hao, Z.; Rao, Y.; Gong, Y. Efficient Removal of Cr (VI) with Biochar and Optimized Parameters by Response Surface Methodology. Processes 2021, 9, 889, doi:10.3390/pr9050889.
Peng, H.; Guo, J.; Qiu, H.; Wang, C.; Zhang, C.; Hao, Z.; Rao, Y.; Gong, Y. Efficient Removal of Cr (VI) with Biochar and Optimized Parameters by Response Surface Methodology. Processes 2021, 9, 889, doi:10.3390/pr9050889.
Abstract
A highly efficient reduction process of Cr (VI) with biochar was conducted in this paper. The results showed that nearly 100% Cr (VI) was reduced at selected reaction conditions: the dosage of biochar at m (C)/m(Cr) = 3.0, reaction temperature of 90 ℃, reaction time at 60 min and concentration of H2SO4 of 20 g/L, respectively. The reduction kinetics analysis demonstrated that the reduction of Cr (VI) fitted well with the pseudo-first-order model and the apparent activation energy was calculated to 40.24 kJ/mol. Response surface methodology confirmed that all the experimental parameters had positive effect on the reduction of Cr (VI). The influence of each parameter on the reduction process followed the order: dosage of biochar> Concentration of H2SO4 > Reaction Temperature > Reaction Time. This paper provided a versatile strategy for treatment of wastewater containing Cr (VI) and showed a bright tomorrow for wastewater treatment.
Chemistry and Materials Science, Analytical Chemistry
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