固定化微藻去除淡水中重金属的研究

Jing Fan, Xiuli Xu, Caiyun Zhang, Yiming Zhang, Zexiong Wu
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引用次数: 0

摘要

本研究主要研究了用海藻酸钠和聚乙烯醇(PVA)固定化淡水微藻——斜四角藻去除水中重金属的方法。研究过程中进行的实验证明了微藻珠对铅、铜和镉的吸附效果,吸附过程主要通过羟基、羧基和羰基进行。在0.25和0.2 g之间改变珠粒的质量仅对其对镉离子的吸附能力产生最小影响。对铅的去除率最高,其次是Cu和Cd。吸附剂用量为2g时,对所有测试金属的去除率最高。基于最优数据点,pH对去除率的影响是非线性的。基于Freundlich和Langmuir模型的分析表明,斜四角藻对重金属的吸附能力显著,特别是Pb,随温度的升高而增加。
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Removal of Heavy Metals from Freshwater Using Immobilized Microalgae
This study focused on the use of Tetradesmus obliquus, a freshwater microalga, immobilized using sodium alginate and polyvinyl alcohol (PVA) for removing heavy metals from water. Experiments conducted during the study demonstrated the adsorption efficacy of microalgae beads with respect to lead, copper, and cadmium, with the adsorption process predominantly facilitated via hydroxyl, carboxyl, and carbonyl groups. Varying the mass of beads between 0.25 and 0.2 g only minimally affected their adsorption capacity for cadmium ions. The highest removal rate was observed for Pb, followed by Cu and Cd. Maximum removal for all tested metals was achieved at an adsorbent dosage of 2 g. Based on optimal data points, the influence of pH on the removal rate was nonlinear. Analyses based on Freundlich and Langmuir models demonstrated the remarkable adsorption capacity of Tetradesmus obliquus with respect to heavy metals, particularly Pb, which increased with temperature.
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来源期刊
Journal of Biobased Materials and Bioenergy
Journal of Biobased Materials and Bioenergy 工程技术-材料科学:生物材料
自引率
0.00%
发文量
60
审稿时长
6 months
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