Abstract

This article studies the effects of solubility, disperse features (average diameter d_av and charge (ζ‑potential)) of the particles of heavy-metal slightly soluble compounds exemplified by aluminum(III), iron(III), zinc(II), and lead(II) hydrates related to the efficiency of their removal from aqueous solutions in the composition by electroflotation and filtration within the pH range 5–12. The efficiency of the electroflotation-based Pb(II) removal from aqueous solutions is determined by the sorption of ions and the dispersed Pb(II) phase on the Al(III) and Zn(II) dispersed phase. The size of the disperse phase of multicomponent systems is averaged compared to that of individual compounds. The maximum particle size of the dispersed phase of multicomponent systems comprising Al(III)–Zn(II)–Pb(II) at a pH of 8.0 reaches 36 μm, in the Fe(III)–Zn(II)–Pb(II) and this parameter reaches 46 μm at a pH of 9.0. The ζ-potential of the dispersed phase of the studied systems varies in the range from –2 to –9 mV for all the systems within the pH range 7–9. The research showed that the efficiency of the removal of lead(II) and accompanying metals compounds from wastewater through electroflotation reaches 95–97% within the pH range 8–9. Filtration of the solutions allows us to improve the removal to 99% and higher.

中文翻译：

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在铝（III）和铁（III）离子作为混凝剂的情况下提高从水溶液中电浮选萃取铅（II）离子的效率

摘要

本文研究了溶解度，分散特性（平均直径d _av的重金属微溶性化合物颗粒的电荷和电荷（ζ电位），例如铝（III），铁（III），锌（II）和铅（II）水合物与从水中去除的效率有关溶液通过电浮选和过滤在pH范围5–12中的溶液。从水溶液中电浮基去除Pb（II）的效率取决于离子的吸附以及Al（III）和Zn（II）分散相上的分散Pb（II）相。与单个化合物相比，将多组分体系的分散相尺寸平均。在Fe（III）-Zn（II）-Pb（II）中，包含Al（III）-Zn（II）-Pb（II）的多组分体系分散相的最大粒径在pH值为8.0时达到36μm。 ），并且该参数在9.0的pH值下达到46μm。在7–9的pH范围内，所有系统的分散相的ζ电位在–2到–9 mV范围内变化。研究表明，在8-9的pH范围内，通过电浮选去除废水中的铅（II）和伴随的金属化合物的效率达到95-97％。溶液的过滤使我们可以将去除率提高到99％或更高。