Removal of Cr (VI) from aqueous solution using magnetic biochar synthesized by a single step method

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	Removal of Cr (VI) from aqueous solution using magnetic biochar synthesized by a single step method
	Yang, Ping ; Guo, Dabin ; Chen, Zhihua ; Cui, Baihui ; Xiao, Bo ; Liu, Shiming ; Hu, Mian
	2017
Source Publication	JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
Volume	38 Pages:1665-1674
Other Abstract	Magnetic biochar, as an adsorbent, was synthesized by a single step method, where iron salt was directly mixed with pinewood sawdust by chemical co-precipitation and subsequently pyrolyzed at 700 degrees C for Cr (VI) removal from aqueous solution. The effects of some important parameters including adsorbent dosage (0.4-2.8g/L), pH (1-10) of the solution, contact time (0-1440 minutes), initial concentration (30-120mg/L), and temperature (20-40 degrees C) were investigated in batch experiments. Both pre- and post-adsorbents were characterized by SEM-EDX and XPS to investigate the adsorption mechanism. The maximum adsorption capacity of the tested magnetic biochar under the certain experimental conditions determined as optimal was 42.7mg/g for Cr (VI). The adsorption data were proved to be suitable for the pseudo-second order model for kinetics and the Langmuir model for isotherms with correlation R-2=0.9996 andR(2)>0.9980, respectively, after fitting with four kinetic models (pseudo-first order, pseudo-second order, W-M model, and Elovich) and three isotherm models (Langmuir, Freundlich, and Temkin). The characteristic analyses further verified that the efficient particle was a mixture of iron oxides in essence, and it had a strong effect on the spontaneous and endothermic adsorption process.
Keyword	Adsorption Cr (VI) magnetic biochar
Document Type	期刊论文
Identifier	http://ir.giec.ac.cn/handle/344007/16752
Collection	中国科学院广州能源研究所
Recommended Citation GB/T 7714	Yang, Ping,Guo, Dabin,Chen, Zhihua,et al. Removal of Cr (VI) from aqueous solution using magnetic biochar synthesized by a single step method[J]. JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY,2017,38:1665-1674.
APA	Yang, Ping.,Guo, Dabin.,Chen, Zhihua.,Cui, Baihui.,Xiao, Bo.,...&Hu, Mian.(2017).Removal of Cr (VI) from aqueous solution using magnetic biochar synthesized by a single step method.JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY,38,1665-1674.
MLA	Yang, Ping,et al."Removal of Cr (VI) from aqueous solution using magnetic biochar synthesized by a single step method".JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY 38(2017):1665-1674.

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