Méndez A, Barriga S, Fidalgo J M, Gascó G
Departamento de Ingeniería de Materiales. ETSIMinas, Universidad Politécnica de Madrid, Madrid,Spain.
J Hazard Mater. 2009 Jun 15;165(1-3):736-43. doi: 10.1016/j.jhazmat.2008.10.055. Epub 2008 Nov 1.
This paper deals with the removal of Cu(2+) from water using adsorbent materials prepared from paper industry waste materials (one de-inking paper sludge and other sludge from virgin pulp mill). Experimental results showed that de-inking paper sludge leads to mesoporous materials (V(mic)/V(T)=0.13 and 0.14), whereas the sludge from virgin pulp mill produces high microporous adsorbents (V(mic)/V(T)=0.39 and 0.41). Adsorbent materials were then used for Cu(2+) removal from water at acid pH. During water treatment, heavy metals lixiviation from adsorbent materials was not produced. However, important Ca and Mg leaching was observed. Final pH significantly increases after treatment of water with adsorbent materials probably due to their elevated CaCO(3) content. In general, highest Cu(2+) removal was obtained using adsorbent materials from de-inking paper sludge. This result could be due to their higher content in oxygenated surface groups, high average pore diameter, elevated superficial charge density, high CaCO(3) amount and high Ca and Mg exchange content.
本文论述了利用造纸工业废料（一种脱墨纸污泥和另一种原生纸浆厂污泥）制备的吸附材料去除水中的Cu(2+)。实验结果表明，脱墨纸污泥可形成介孔材料（V(mic)/V(T)=0.13和0.14），而原生纸浆厂的污泥则产生高微孔吸附剂（V(mic)/V(T)=0.39和0.41）。然后将吸附材料用于在酸性pH值下去除水中的Cu(2+)。在水处理过程中，未产生吸附材料中重金属的浸出。然而，观察到有大量的钙和镁被浸出。用吸附材料处理水后，最终pH值显著升高，这可能是由于其碳酸钙含量较高。总体而言，使用脱墨纸污泥制备的吸附材料对Cu(2+)的去除率最高。这一结果可能归因于其含氧表面基团含量较高、平均孔径较大、表面电荷密度较高、碳酸钙含量较高以及钙和镁交换含量较高。
