Manganese ferrite modified agricultural waste-derived biochars for copper ions adsorption

被引：43

作者：

Huang, Wei-Hao ^{[1
]}

Wu, Rome-Ming ^{[2
]}

Chang, Jo-Shu ^{[3
]}

Juang, Shiang-Ying ^{[4
]}

Lee, Duu-Jong ^{[1
,5
,6
]}

机构：

[1] Natl Taiwan Univ, Dept Chem Engn, Taipei, Taiwan

[2] Ming Chi Univ Technol, Dept Safety Hlth & Environm Engn, 84 Gong Juan Rd, New Taipei 243, Taiwan

[3] Tunghai Univ, Res Ctr Smart Sustainable Circular Econ, Taichung 407, Taiwan

[4] Natl Yang Ming Chiao Tung Univ, Inst Environm Engn, Hsinchu 300, Taiwan

[5] City Univ Hong Kong, Dept Mech Engn, Kowloon Tong, Hong Kong, Peoples R China

[6] Yuan Ze Univ, Dept Chem & Mat Sci, Chungli 320, Taiwan

来源：

BIORESOURCE TECHNOLOGY | 2023年 / 367卷

关键词：

Modification; Adsorption; Manganese ferrite; Mechanism; ENVIRONMENTAL APPLICATION;

D O I：

10.1016/j.biortech.2022.128303

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

Biochar is an eco-friendly, low-cost, and carbon-rich material. This study synthesized the biochars from three agricultural wastes, pinecone, white popinac, and sugarcane bagasse, and then modified them by manganese ferrite (MnFe2O4) co-precipitation. These biochars were applied as adsorbents for the removal of Cu(II) ions from water. All three different MnFe2O4-biochars have similar adsorption performances: rapid adsorption kinetics with equilibrium being reached within 5 hr of contact and significantly enhanced adsorption capacities of Cu(II) ions from water. The principal adsorption mechanisms were identified as complexation reactions, contributed by the carboxyl and hydroxyl groups by pristine biochars and by the Mn-O and Fe-O groups for all three MnFe2O4biochars. The MnFe2O4-biochars can be reused for three cycles, with the maximum adsorption capacities of Cu (II) of the regenerated biochars declining with the loss of precipitated MnFe2O4.

引用

页数：7

共 21 条

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