Synthesis and Characterization of Novel Fe-Mn-Ce Ternary Oxide–Biochar Composites as Highly Efficient Adsorbents for As(III) Removal from Aqueous Solutions
Xuewei Liu,
Guogang Zhang,
Lina Lin,
Zulqarnain Haider Khan,
Weiwen Qiu,
Zhengguo Song
Affiliations
Xuewei Liu
College of Land and Environmental, Shenyang Agricultural University, Shenyang 110866, China
Guogang Zhang
College of Life Sciences, Tianjin Normal University, Tianjin 300387, China
Lina Lin
Agro-Environmental Protection Institute, Ministry of Agriculture of China, Tianjin 300191, China
Zulqarnain Haider Khan
Agro-Environmental Protection Institute, Ministry of Agriculture of China, Tianjin 300191, China
Weiwen Qiu
The New Zealand Institute for Plant and Food Research Limited, Private Bag 4704, Christchurch 8140, New Zealand
Zhengguo Song
Agro-Environmental Protection Institute, Ministry of Agriculture of China, Tianjin 300191, China
The widespread pollution of water bodies with arsenic (As) necessitates the development of efficient decontamination techniques. To address this issue, we herein prepare Fe-Mn-Ce ternary oxide-biochar composites (FMCBCs) using impregnation/sintering methods and examined their physicochemical properties, morphologies, and As(III) removal performances. The specific surface area of FMCBCs increased with increasing Ce content and enhanced the quantity of surface functional groups (⁻OH, ⁻COOH). The adsorption of As(III) on FMCBCs was well represented by pseudo-second-order kinetics, and the As(III) adsorption capacity of the best-performing FMCBCs (8.47 mg g−1 for FMCBC3) exceeded that of BC by a factor of 2.9. At pH = 3, the amount of adsorption of As(III) by FMCBCs reached a maximum, and the increased ionic strength could enhance adsorption capacity of FMCBCs. Moreover, an As(III) removal efficiency of ~99% was observed for FMCBC3 at a dosage of 8 g L−1, which highlighted its great potential as an absorbent for As(III) removal from contaminated water.
