The roles of Al2O3 nanoparticles on the removal of carbamazepine (CBZ) by Chlorella vulgaris immobilized in sodium alginate gel beads were for the first time investigated. The optimum conditions to prepare immobilized C. vulgaris beads with addition of Al2O3 nanoparticles were determined as follows: C. vulgaris density was 3.0 × 106 cells for 1 mL sodium alginate solution, Al2O3 nanoparticle concentration was 0.5 g/L, and concentrations of sodium alginate and CaCl2 were 1.6% and 1%, respectively. The results showed that the proposed algae beads achieved the highest CBZ removal rate of 89.6% after 4 days of treatment, relative to 68.84%, 48.56%, and 17.76% in sodium alginate-immobilized C. vulgaris, free microalgae, and Al2O3 nanoparticle alginate beads, respectively. The results also showed that the CBZ removal rate increased with more proposed algae beads, while decreased with increased bead diameter. The algae beads exhibited excellent CBZ removal ability even after three recycles. This work provided an economical and effective approach to remove CBZ from water.

中文翻译：

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Al2O3纳米颗粒促进海藻酸钠凝胶珠固定化小球藻对水中卡马西平的去除

首次研究了 Al2O3 纳米颗粒对固定在海藻酸钠凝胶珠中的普通小球藻去除卡马西平 (CBZ) 的作用。添加Al2O3纳米颗粒制备固定化C. vulgaris珠的最佳条件确定如下：C. vulgaris密度为3.0×106个细胞，1 mL海藻酸钠溶液，Al2O3纳米颗粒浓度为0.5 g/L，海藻酸钠浓度CaCl2 和 CaCl2 分别为 1.6% 和 1%。结果表明，所提出的藻珠在处理 4 天后实现了 89.6% 的最高 CBZ 去除率，相对于海藻酸钠固定的普通普通藻、游离微藻和 Al2O3 纳米颗粒海藻酸盐中的 68.84%、48.56% 和 17.76%珠，分别。结果还表明，CBZ 去除率随着建议的藻珠增加而增加，而随着珠直径的增加而降低。即使经过 3 次循环，藻珠仍表现出优异的 CBZ 去除能力。这项工作为从水中去除 CBZ 提供了一种经济有效的方法。