Optimum conditions of pH, temperature and preculture for biosorption of europium by microalgae Acutodesmus acuminatus
Optimum conditions of pH, temperature and preculture for biosorption of europium by microalgae Acutodesmus acuminatus
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DOI：
10.1016/j.bej.2018.12.007
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发表时间：
2019-03-15
影响因子：
3.9
通讯作者：
Hasegawa, Hiroshi
中科院分区：
文献类型：
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作者：
Furuhashi, Yasuhiro;Honda, Ryo;Hasegawa, Hiroshi
本研究以电子废弃物中稀土元素的回收为目的，研究尖突突藻对铕的生物吸附特性。比较了不同时间、pH值、温度和预培养条件下，菌体对铕的吸附能力。在pH为4.7、温度为40 ℃的条件下，吸附量最大，为174.2mg/g干重。该能力高于或相当于过去研究中的其他生物吸附剂。温度升高时吸附量的下降表明生物机制的作用而非物理化学吸附。透射电镜能谱分析表明，菌体内铕颗粒的存在和预培养条件的影响表明，菌体对铕的吸收是导致菌体对铕的高吸附量的主要原因。尖肌
In this study, we investigated characteristics of europium biosorption by Acutodesmus acuminatus, with particular aim to recover rare earth elements from electronical waste. The adsorption capacity of europium was compared under various time duration, pH, temperature and preculture conditions. The maximum adsorption capacity of 174.2 mg/g-dry was achieved under pH at 4.7 at 40 degrees C. This capacity was higher or comparable to other biosorbents in the past studies. Decrease of adsorption capacity at higher temperature indicated contribution of biological mechanisms rather than physico-chemical adsorption. Presence of intra-cellular europium particles observed by TEM-EDX and effect of preculture conditions suggested that intra-cellular uptake of europium resulted in high capacity of europium biosorption by A. acuminatus.