Universidad de Extremadura, Department of Chemical Engineering and Physical Chemistry, Avda. de Elvas s/n, 06071 Badajoz, Spain.
J Hazard Mater. 2011 Feb 28;186(2-3):1704-12. doi: 10.1016/j.jhazmat.2010.12.075. Epub 2010 Dec 22.
The current article studies the optimization of a new coagulant agent for water purification and wastewater remediation. Design of experiments is used for optimizing the production of this new tannin-based coagulant by using Acacia mearnsii de Wild tannin extract, NH(4)Cl and formaldehyde. The effectiveness of this product was confirmed on dye-polluted wastewater and surfactant wastewater. This cationic coagulant seems to be sensitive to temperature and tannin-NH(4)Cl ratio (g of ammonium chloride per g of tannin extract). NH(4)Cl ratio was found to be more influent than temperature and no interaction is presented between these two parameters. For each system, an optimum combination NH(4)Cl ratio and temperature was found: 24.9°C and 2 g g(-1) for dye removal and 36.4°C and 1.87 g g(-1) for surfactant elimination. The optimal conditions were merged to produce a combined coagulant that was tested on dye, surfactant, surface river water and municipal wastewater. Predicted levels of remediation were experimentally confirmed.
本文研究了一种新型净水和废水修复混凝剂的优化。通过使用金合欢单宁提取物、NH（4）Cl 和甲醛，采用实验设计对这种新型单宁基混凝剂的生产进行了优化。该产品在染料污染废水和表面活性剂废水中的有效性得到了证实。这种阳离子混凝剂似乎对温度和单宁-NH（4）Cl 比（每克单宁提取物的氯化铵克数）敏感。发现氯化铵比温度更有影响，这两个参数之间没有相互作用。对于每个体系，都找到了一个最佳的氯化铵比和温度组合：染料去除的最佳温度和氯化铵比为 24.9°C 和 2 g g（-1），表面活性剂去除的最佳温度和氯化铵比为 36.4°C 和 1.87 g g（-1）。将最佳条件合并以生产一种复合混凝剂，用于染料、表面活性剂、地表河水和城市废水的处理。实验证实了预期的修复水平。
