Preparation and Cr(VI) removal performance of corncob activated carbon.

Environmental Science and Pollution Research International
Hongyan LiJici Cheng

Abstract

Corncob activated carbon (CCAC) was prepared by a H3PO4 activation method. The optimum conditions for the preparation of CCAC were determined by orthogonal experiments. The effects of pH, reaction time, CCAC dosage, and hexavalent chromium (Cr(VI)) concentrations on Cr(VI) removal by CCAC were studied. Corn straw activated carbon (CSAC) was also prepared using the optimum preparation conditions determined for CCAC. The properties of samples were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) analysis, scanning electron microscopy (SEM), and energy dispersive spectroscopy (EDS). The results showed that the optimum preparation conditions for CCAC were as follows: a mass of corncob of 10 g; a mass ratio of corncob to H3PO4 of 1:2; a 5% H3BO3 content of 10 mL; an impregnation time of 45 min; a carbonization temperature of 500 °C. The optimum conditions for the removal of Cr(VI) were as follows: pH < 9; temperature, 308 K; rotation speed, 150 r min-1; reaction time, 60 min; CCAC dosage, 1 g L-1. The Cr(VI) removal rate was above 98%, and the maximum adsorption capacity of CCAC was 9.985 mg g-1. The concentration of residual Cr(VI) in water was less than 0.05 mg ...Continue Reading

References

Aug 15, 2006·Journal of Hazardous Materials·Dinesh Mohan, Charles U Pittman
Apr 2, 2014·Journal of Hazardous Materials·Jaehong ShimByung-Taek Oh
Jan 30, 2015·Environmental Monitoring and Assessment·Muhammad Mahmood-Ul-HassanMuhammad Yasin
Aug 2, 2015·Journal of Environmental Management·Wenzhe SongYuxiang Feng

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Citations

Dec 15, 2019·Environmental Science and Pollution Research International·Kazem GodiniJae-Kyu Yang
May 21, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Somaia G MohammadAyman H Kamel
Sep 20, 2018·Environmental Science and Pollution Research International·Pâmela Becalli VilelaAlexandre Tadeu Paulino
Jul 25, 2021·The Science of the Total Environment·Ashvinder K RanaVijay Kumar Thakur

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