Removal of nickel and copper ions in strongly acidic conditions by in-situ formed amyloid fibrils

Fan Yuying; Lan Huachun; Qi ZengluLiu RuipingHu Chengzhi

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Removal of nickel and copper ions in strongly acidic conditions by in-situ formed amyloid fibrils

机译：Removal of nickel and copper ions in strongly acidic conditions by in-situ formed amyloid fibrils

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The research investigated a novel strategy that can synchronously remove Ni2+ and Cu2+ by synthesizing amyloid fibrils under harsh conditions. The adsorption capacity of Ni2+ and Cu2+ increased by 18.5% and 34.1% respectively in the in-situ scenario as compared to that Ni2+ and Cu2+ were introduced after amyloid fibrils preparation, meantime, it avoids the generation of acidic waste liquid in the process of preparing amyloid fibrils. The adsorption behaviors of Ni2+ and Cu2+ can be well described by the pseudo-second-order kinetic model and Langmuir isotherm. The functional groups of amide, hydroxyl, and carboxyl played determining roles in the adsorption process. Moreover, when the amyloid fibrils were prepared in the presence of Ni2+ and Cu2+, i.e., the in-situ adsorption scenario, metal ions tended to occupy the functional sites, inhibit protein aggregation, and affect long amyloid fibrils synthesis accordingly. Metal ion-binding site prediction server was used to predict the binding sites of metal ions towards the protein sequence within amyloid fibrils, and the metal ion was observed to preferentially bind to a particular residue such as glutamic acid, cysteine, and serine. The amyloid fibrils be potentially valuable for the removal of heavy metals in strongly acidic wastewater such as acidic mining drainage.

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来源
《Chemosphere》 |2022年第6期|134241.1-134241.9|共9页
作者
Fan Yuying; Lan Huachun; Qi ZengluLiu RuipingHu Chengzhi;
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作者单位

Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Aquat Chem, Beijing 100085, Peoples R China|Northeast Normal Univ, Sch Environm, Changchun 130117, Peoples R China;

Tsinghua Univ, Ctr Water & Ecol, Sch Environm, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100084, Peoples R China;

Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Aquat Chem, Beijing 100085, Peoples R China|Univ Chinese Acad Sci, Beijing 100049, Peoples R ChinaTsinghua Univ, Ctr Water & Ecol, Sch Environm, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100084, Peoples R China|Univ Chinese Acad Sci, Beijing 100049, Peoples R China;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《化学文摘》(CA);
原文格式 PDF
正文语种英语
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关键词
Amyloid fibrils; Heavy metals; In-situ adsorption; Amide groups; Metal ion-binding site prediction;

Removal of nickel and copper ions in strongly acidic conditions by in-situ formed amyloid fibrils

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