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首页> 外文期刊>Materials Sciences and Applications >Biosorption of Cu(II) Ions from Aqueous Solution by Red Alga (Palmaria Palmata) and Beer Draff
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Biosorption of Cu(II) Ions from Aqueous Solution by Red Alga (Palmaria Palmata) and Beer Draff

机译：红藻（Palmaria Palmata）和啤酒残渣对水溶液中Cu（II）离子的生物吸附

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In this study, the ability of red alga (Palmaria palmata) and beer draff (brewery waste) for Cu(II) removal was investigated. The influence of factors, such as pH, initial copper concentrations, and contact time, were also studied. Results showed the adsorption process was strongly dependent on the pH value and initial concentration. The optimum pH value was in the range of 5-6. The Langmuir isotherm model performed better than other models, suggesting monolayer adsorption prevailed in the adsorption process. The theoretical adsorption capacities for Cu(II) were 12.7 mg/g and 9.01 mg/g for red alga and beer draff, respectively. The spectroscopy analyses and desorption studies showed that chemical bonding was the main mechanism in the adsorption process rather than ion exchange. The functional groups of amino, hydroxyl, carboxyl, phenolic hydroxyl, sulphonic group and C–O, –NH stretch might be involved in adsorption. After adsorption, both materials were successfully regenerated by nitric acid at a concentration of 10 mmol/L. Furthermore, the phenomenon that only 7% of adsorbed Cu(II) on red alga and 11% on beer draff were desorbed by sodium chloride solution suggested potential alternative of both materials for the treatment of road runoff containing considerable amounts of de-icing salt.
机译：在这项研究中，研究了红藻（Palmaria palmata）和啤酒残渣（酿酒废料）去除Cu（II）的能力。还研究了诸如pH，初始铜浓度和接触时间等因素的影响。结果表明，吸附过程在很大程度上取决于pH值和初始浓度。最适pH值在5-6范围内。 Langmuir等温模型的性能优于其他模型，表明吸附过程中普遍存在单层吸附。 Cu（II）对红藻和啤酒残渣的理论吸附容量分别为12.7 mg / g和9.01 mg / g。光谱分析和解吸研究表明，化学键是吸附过程中的主要机理，而不是离子交换。氨基，羟基，羧基，酚羟基，磺酸基和C–O––NH的官能团可能与吸附有关。吸附后，两种材料均通过浓度为10 mmol / L的硝酸成功再生。此外，氯化钠溶液只能解吸红藻上7％的铜（II）和啤酒残渣上11％的铜（II），这表明这两种材料都可能替代含大量除冰剂的道路径流盐。

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