Navarro Abel E, Portales Rosario F, Sun-Kou María R, Llanos Bertha P
Department of Chemistry, Graduate School of Arts and Science, New York University, New York, NY 1003, USA.
J Hazard Mater. 2008 Aug 15;156(1-3):405-11. doi: 10.1016/j.jhazmat.2007.12.039. Epub 2007 Dec 23.
Biosorption of phenol by the marine seaweeds Lessonia nigrescens Bory and Macrocystis integrifolia Bory was investigated as a function of initial solution pH, showing a higher adsorption percentage at pH 10 with values between 10% and 35%, respectively. The apparent ionization constants of the algae were determined by means of the Katchalsky's theory, obtaining values close to 3.0 for both seaweeds. From the results, a strong adsorption dependence on pH is proposed at the level of the phenol's aqueous chemistry driven purely by a polar mechanism that involves the formation of hydrogen bonds with the hydroxyl groups that are spatially arranged in the polysaccharic chains that form the seaweed structure. This study shows that both marine algae are potential biosorbents in their application for the removal of phenol and derivatives from residual waters.
研究了海洋海藻黑叶马尾藻（Lessonia nigrescens Bory）和全缘巨藻（Macrocystis integrifolia Bory）对苯酚的生物吸附作用与初始溶液pH值的关系，结果表明在pH 10时吸附百分比更高，分别在10%至35%之间。利用卡查尔斯基理论测定了藻类的表观电离常数，两种海藻的值均接近3.0。根据结果，提出在苯酚水相化学水平上，吸附对pH有很强的依赖性，这纯粹是由一种极性机制驱动的，该机制涉及与海藻结构中多糖链上空间排列的羟基形成氢键。本研究表明，这两种海洋藻类在从残留水中去除苯酚及其衍生物的应用中都是潜在的生物吸附剂。
