Issue 54, 2019

Effective removal of Cr(vi) from aqueous solution by biochar supported manganese sulfide

Abstract

In order to remove hexavalent chromium (Cr(VI)) efficiently and simplify the adsorbent preparation process, we employed a single step method to prepare a new biochar supported manganese sulfide material. The nanoscale MnS particles were highly soldered on the biochar support surface, and this adsorbent displayed the effective removal of Cr(VI) (98.15 mg L−1) via synergistic effect between adsorption and reduction/precipitation under weak acid conditions (pH = 5.0–6.0). The adsorption kinetic data were described well by the pseudo second-order kinetic model, suggesting that the reaction process was a chemisorption process. The adsorption isotherm data were described well by the Redlich–Peterson model, further suggesting that this reaction was a hybrid chemical reaction-sorption process. In addition, the Dubinin–Radushkevich isotherm model with 8.28, 8.57, and 12.91 kJ mol−1 adsorption energy also suggests that it was a chemisorption process. The simple and eco-friendly preparation process, low-cost, and the high removal efficiency could make it a promising material for the purification of Cr(VI)-contaminated wastewater.

Graphical abstract: Effective removal of Cr(vi) from aqueous solution by biochar supported manganese sulfide

Supplementary files

Article information

Article type
Paper
Submitted
03 Aug 2019
Accepted
07 Sep 2019
First published
02 Oct 2019
This article is Open Access
Creative Commons BY license

RSC Adv., 2019,9, 31333-31342

Effective removal of Cr(VI) from aqueous solution by biochar supported manganese sulfide

S. Zhang, H. Zhang, F. Liu, F. Yang, S. Zhou, K. Zheng, C. Chu, L. Liu and M. Ju, RSC Adv., 2019, 9, 31333 DOI: 10.1039/C9RA06028F

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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