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Microalgae: a sustainable adsorbent with high potential for upconcentration of indium(III) from liquid process and waste streams
Green Chemistry ( IF 9.3 ) Pub Date : 2020/02/21 , DOI: 10.1039/c9gc03073e
Nina Ricci Nicomel 1, 2, 3, 4, 5 , Lila Otero-Gonzalez 1, 2, 3, 4, 5 , Larissa Arashiro 1, 2, 3, 4, 5 , Marianna Garfí 6, 7, 8, 9, 10 , Ivet Ferrer 6, 7, 8, 9, 10 , Pascal Van Der Voort 3, 4, 11, 12, 13 , Kim Verbeken 3, 5, 14, 15, 16 , Tom Hennebel 3, 4, 5, 17, 18 , Gijs Du Laing 1, 2, 3, 4, 5
Affiliation  

Indium (In) is a critical raw material in heavy demand in the optical-electronics industry. With its high supply risk, sustainable technologies are needed to recover In(III) from secondary sources, such as leachates from sludge produced by zinc processing industries (e.g., jarosite) and indium tin oxide etching wastewater. This study presents In(III) biosorption as an eco-friendly alternative to conventional physicochemical recovery technologies. The characteristics of In(III) adsorption by microalgal biomass were investigated in batch experiments. Adsorption isotherms were well-fitted by the Freundlich model. The estimated maximum In(III) adsorption capacity of microalgae was 0.14 mmol g−1, which is higher than that of some chemically modified adsorbents reported in the literature. Selectivity for In(III) was also observed over other metals, such as Cu(II), Zn(II), and Al(III). Furthermore, the microalgae biosorbent was regenerated using 0.1 M HCl solution, with up to 80% In(III) recovery, for several cycles. From these results, microalgae prove to have potential for In(III) biosorption from aqueous solution.

中文翻译:

微藻:一种可持续的吸附剂,具有从液体工艺和废物流中富集铟(III)的高潜力

铟(In)是光电子工业中大量需求的关键原材料。由于供应风险高,需要可持续的技术来从二次资源中回收In(III),例如从锌加工行业(例如黄钾铁矾)产生的污泥中的沥滤液和氧化铟锡蚀刻废水。这项研究提出In(III)生物吸附是传统物理化学回收技术的一种环保替代品。通过分批实验研究了微藻类生物质对In(III)的吸附特性。吸附等温线通过Freundlich模型很好地拟合。估计的微藻最大In(III)吸附容量为0.14 mmol g -1,这比文献中报道的某些化学改性吸附剂要高。还观察到对In(III)的选择性超过其他金属,例如Cu(II),Zn(II)和Al(III)。此外,使用0.1 M HCl溶液将微藻生物吸附剂再生,回收率高达80%In(III),进行了多个循环。从这些结果来看,微藻被证明具有从水溶液中吸附In(III)的潜力。
更新日期:2020-03-24
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