生物炭
吸附
酸洗
结晶紫
废水
化学
核化学
稻草
稻草
制浆造纸工业
材料科学
香蕉皮
废物管理
化学工程
冶金
热解
无机化学
有机化学
病理
工程类
医学
生物化学
作者
Yunqiang Yi,TU Guo-quan,Guang‐Guo Ying,Zhen Fang,Eric Pokeung Tsang
标识
DOI:10.1016/j.biortech.2021.125743
摘要
Reducing the preparation cost of magnetic biochar is necessary for its large-scale application as an adsorbent. In this study, stainless steel pickling waste liquor and rice straw were successfully applied to synthesize of magnetic biochar (SPWL-MBC). Several iron oxides adhered on the biochar matrix, mainly Fe3O4, Fe2O3 and FeO. SPWL-MBC exhibited superparamagnetism, and its specific surface area was 274.29 m2/g. The material was able to adsorb a model contaminant, crystal violet (CV), with a maximum adsorption capacity of approximately 111.48 mg/g. Adsorption mechanism analysis showed that iron oxides, π-π interaction, hydrogen bonding and electrostatic interaction were responsible for the adsorption of CV. The CV adsorption efficiency of SPWL-MBC remained 71.91% after three adsorption-regeneration cycles. These outcomes illustrate that the magnetic biochar prepared from stainless steel pickling waste liquor can effectively remove CV from wastewater.
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