Departamento de Química Física e Ingeniería Química I, Facultad de Ciencias, Universidad de A Coruña, Alejandro de la Sota 1, 15008, A Coruña, Spain.
J Hazard Mater. 2010 Jun 15;178(1-3):861-6. doi: 10.1016/j.jhazmat.2010.02.017. Epub 2010 Feb 12.
Aluminium removal has been investigated in synthetic and real wastewaters provided by an aluminium surface treatment plant. Marine algae, obtained as beach cast seaweed (a refuse substance) were used as adsorption material. The influence of pH, metal concentration and time for aluminium elimination was studied by use of synthetic solutions. The optimum pH value was 4.0, which provided a maximum adsorption capacity of 22.5 mg g(-1). The adsorption percentage surpassed 80% in less than 30 min of contact time. Real solutions from the industrial unit were fully characterized and tested in two different fixed-bed columns. One column was filled with 27.5 g of dried beach cast seaweed. Three cycles of adsorption and two of desorption were carried out. The first cycle (12 mg g(-1) maximum sorption capacity) was enough to reach the maximum adsorption capacity at 15 mL min(-1) flow rate. The second column was packed with 1100 g of seaweed and its behaviour was compared to another column filled with activated charcoal, following both the same experimental procedure. Maximum sorption capacity was 14 mg g(-1) for seaweed, whereas the activated charcoal only reached 1.6 mg g(-1) (flow rate of 250 mL min(-1)).
已在一家铝表面处理厂提供的合成和实际废水中研究了铝的去除。使用合成溶液研究了 pH 值、金属浓度和去除铝的时间对海洋藻类吸附的影响，这些藻类是作为海滩垃圾（废弃物质）获得的。最佳 pH 值为 4.0，最大吸附容量为 22.5 mg g(-1)。在不到 30 分钟的接触时间内，吸附率超过 80%。对工业装置的实际溶液进行了充分的特征描述和在两个不同的固定床柱中进行了测试。一个柱体填充了 27.5 g 的干燥海滩垃圾海藻。进行了三个吸附循环和两个解吸循环。在 15 mL min(-1)的流速下，第一个循环（最大吸附容量为 12 mg g(-1)）足以达到最大吸附容量。第二个柱体填充了 1100 g 的海藻，其行为与另一个用活性炭填充的柱体进行了比较，采用了相同的实验程序。海藻的最大吸附容量为 14 mg g(-1)，而活性炭仅达到 1.6 mg g(-1)（流速为 250 mL min(-1)）。
