Faculty of Civil Engineering, Architecture and Environmental Engineering, Institute of Environmental Engineering, University of Zielona Góra, 15 Prof. Z. Szafrana St, 65-516 Zielona Góra, Poland.
Molecules. 2020 Feb 2;25(3):641. doi: 10.3390/molecules25030641.
Aluminium exerts undeniable human health effects, so its concentration should be controlled in water treatment plants. The article presents and discusses the results of studies on the influence of selected properties of aluminium coagulants on the concentration of aluminium remaining in the purified water. The coagulants used were classical hydrolysing aluminium salts: aluminium sulphate (VI) and sodium aluminate as well as pre-hydrolysed polyaluminium chlorides: Flokor 105B and PAX XL10 that had different the alkalinity coefficient r = [OH]/[Al]. The Al species distribution in the coagulants samples were analysed by the Ferron complexation timed spectrophotometry. On the basis of their reaction rates with ferron reagent, the aluminium species were divided into three categories: monomeric (Al), medium polymerised (Al) and colloidal (Al). The usefulness of the tested aluminium coagulants due to the concentration of residual aluminium and dissolved aluminium, which is easily assimilated by the human body, was increased according to the following series: sodium aluminate (Al = 100%, Al = 0) < aluminium sulphate (VI) (Al = 91%, Al = 9%) < PAX XL 10 (Al = 6%, Al = 28%, r = 2.10) < Flokor 105B (Al = 3%, Al = 54%, r = 2.55).
铝对人体健康有不可否认的影响，因此应在水处理厂控制其浓度。本文介绍并讨论了选择铝混凝剂的某些性质对净化水中残留铝浓度的影响的研究结果。所使用的混凝剂是经典的水解铝盐：硫酸铝（VI）和偏铝酸钠以及预水解的聚合氯化铝：Flokor 105B 和 PAX XL10，它们具有不同的碱度系数 r = [OH]/[Al]。通过 Ferron 络合定时分光光度法分析了混凝剂样品中的铝形态分布。根据与 Ferron 试剂的反应速率，将铝形态分为三类：单体（Al）、中聚合（Al）和胶体（Al）。根据残留铝和易被人体吸收的溶解铝的浓度，以下系列增加了测试用铝混凝剂的实用性：偏铝酸钠（Al = 100%，Al = 0）<硫酸铝（VI）（Al = 91%，Al = 9%）<PAX XL 10（Al = 6%，Al = 28%，r = 2.10）<Flokor 105B（Al = 3%，Al = 54%，r = 2.55）。
