Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2019 Mar 22:540:579-584.
doi: 10.1016/j.jcis.2019.01.068. Epub 2019 Jan 17.

Removal of heavy metals from aqueous solution using chitosan-combined magnetic biochars

Fangfang Xiao  1 , Jianhua Cheng  2 , Wen Cao  1 , Cao Yang  1 , Junfeng Chen  1 , Zifen Luo  1
Affiliations

Removal of heavy metals from aqueous solution using chitosan-combined magnetic biochars

Fangfang Xiao et al. J Colloid Interface Sci. .

Abstract

The use of chitosan combined with magnetic Loofah biochar (CMLB) was investigated for the removal of Cr(VI) and Cu(II) from aqueous solution. The modified biochar had higher Cr(VI) and Cu(II) adsorption capacity than that of pristine biochar. 40%-CMLB showed high Cr(VI) and Cu(II) adsorption capacity of 30.14 mg/g, and 54.68 mg/g, respectively. Adsorption reached equilibrium within 18 h. The study found that the experimental data showed the best fit for the pseudo-second-order kinetic model and Freundlich model. Additionally, after three reuse cycles, Cr(VI) and Cu(II) adsorption capacity by CMLB were 23.34 mg/g and 42.6 mg/g, respectively. XPS results indicated that ion exchange and surface complexation were the primary mechanisms for Cr(VI) and Cu(II) adsorption.

Keywords: Adsorption; Biochar; Chitosan; Heavy metals.

PubMed Disclaimer

LinkOut - more resources