Preparation and characterization of organic polymer modified composite polyaluminum chloride

Compared with traditional aluminum salts, polyaluminum chloride （PACI） has better coagulation-flocculation performance in turbidity removal. However, it is still inferior to organic polymers in terms of bridging function. In order to improve the aggregating property of PACl, different composite PACl flocculants were prepared with various organic polymers. The effect of organic polymer on the distribution or Al（Ⅲ） species in composite flocculants was studied using ^27TAl NMR and Al-ferron complexation methods. The charge neutralization and surface adsorption characteristics of composite flocculants were also investigated. Jar tests were conducted to evaluate the turbidity removal efficacy of organic polymer modified composite flocculants. The study shows that cationic polymer and anionic polymer have significant influences on the coagulation-flocculation behaviors of PACl. Both cationic and anionic polymers can improve the turbidity removal performancc of PACl but the mechanisms arc much different： cationic organic polymer mainly increases the charge neutralization ability, but anionic polymer mainly enhances the bridging function.

复合高分子絮凝剂的制备及研究进展

复合高分子絮凝剂近年来发展迅速并成为研究的热点。对无机复合高分子絮凝剂、有机复合高分子絮凝剂和无机-有机复合高分子絮凝剂的国内外研究现状进行了概述,分析了复合高分子絮凝剂处理废水的优势及其发展面临的问题,指出无机-天然有机复合高分子絮凝剂将是未来研究的重点。

PAC-PDMDAAC无机/有机复合絮凝剂除磷研究

研究了无机/有机复合絮凝剂PAC-PDMDAAC用于废水除磷,探索了PAC-PDMDAAC复合絮凝剂除磷的最佳配比范围和最佳用量。研究表明,在最佳条件下对模拟废水磷去除率为94.4%,浊度去除率为97%,。本实验还将该复合絮凝剂应用于实际生活废水, 对于实际废水的磷去除率为95%,浊度去除率为94.5%,达到国家含磷污水排放一级标准(GB8978-1996)。

有机-无机复合絮凝剂研究进展

随着环保监管标准的不断加强,各个行业都面临着对废水、污泥处理技术的挑战,单一种类的絮凝剂已无法满足各类污水处理需求,有机-无机复合絮凝剂在污水、污泥处理领域克服了单一絮凝剂的缺点,发挥着越来越重要的作用。采用科学合理的有机和无机絮凝剂组合方法分析絮凝剂作用机理,可有效提高复合絮凝剂的作用效果。研究结果表明,有机高分子-无机铝复合絮凝剂比单一药剂的处理效果提高30%以上,能有效降低药剂投加量并减少絮凝剂的残留,特别对含油污水和造纸废水处理效果显著;有机高分子-无机铁复合絮凝剂具有较好的染料废水脱色和污泥脱水效果,可使污泥量减少60%;有机高分子与其他无机絮凝剂复合后,在特种废水处理中表现出很多独特性能。有机-无机复合絮凝剂显著的协同效应,使其在污水处理、污泥脱水等领域得以广泛应用,多功能、高效廉价、绿色环保型有机-无机复合絮凝剂的开发将成为絮凝剂的主要发展方向。

新型无机-有机配合物的絮凝作用及絮体回用效果

利用阳离子角蛋白与聚硫酸铝合成新型无机-有机配合物絮凝剂,对比分析其与单一阳离子角蛋白、聚硫酸铝絮凝剂对皮革染色加脂废水的絮凝效果,收集絮体处理后用作皮革填充剂,研究其对皮革的填充性能。结果表明:新型无机-有机配合物絮凝剂的絮凝效果最佳,对COD、SS、色度和浊度的去除率分别为84.60%、96.56%、96.14%和98.06%。絮体用作皮革填充剂后皮质柔软丰盈,各项测试性能指标均得到提高,其中坯草的厚度、拉伸强度、撕裂强度和断裂伸长率分别提升了10.00%、197.20%、15.20%和24.72%。絮体得到有效回用,可达到以废治废的皮革清洁生产目的。