OPTIMIZATION OF THE REAGENT METHOD OF CLEANING OF COPPER (II) -STATER WATER

Оксана Миколаївна Терещенко
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Abstract

Sewage water of electrochemical manufactures that exist at almost every machine and instrument making enterprise are the main source of the heavy metals that flow into the reservoir. The greatest interest is the purification of sewage from ions of copper (II). From the variety of available methods for purifying water from heavy metal ions, the most potentially suitable are traditional reagent methods as they are versatile, easy to operate and cheap. But they do not always provide theadmissible concentrations. All this necessitates the development and implementation of new modern technologies that allow ensuring high efficiency of the processes of purification from heavy metal ions. This also gives possibility of creating integrated technologies with a closed cycle of water consumption on their basis. Recently, the interest in derivatives of iron-synthetic acid has increased considerably; ferrocyanides acquire a rapidly growing practical value. It is known that ferrocyanides of heavy metals have very low solubility, therefore it was suggested to use potassium ferocyanide as a precipitant in order to remove copper ions from the researched solutions. Since the copper (II) ferrocyanides can form stable colloidal systems, settling solutions will be a long-term and technologically not always justifiable solution, because of its inappropriate usage as an independent method of purification. Typically, this method is combined with the filtering method. In this work, the effectiveness of the flocculantZetag 7547 was investigated. The purpose of this work is to study the features of sewage purification from copper ions (II) applying precipitation method using potassium ferrocyanide and water soluble polyelectrolyte Zetag 7547. To achieve this goal, the following tasks need to be solved: increase the depth of the deposition reaction; intensify the processes of aggregation and sedimentation of particles of the dispersed phase. To reach the optimal conditions for reagent treatment of wastewater, preliminary studies of the pH solution influence on the solubility of the formed copper (II) ferrocyanates have been made. Studies have shown that optimal pH values of precipitation of Cu (II) are within the range of 6.5 to 7.5. In order to intensify the reagent water purification, it was suggested to make its processed flocculation. When used in low concentrations, Zetag-7547 flocculant decreases potassium ferrocyanide significantly from aqueous solutions. From obtained results list of ratios of concentrations of potassium ferrocyanide and flocculant, which should be used to purify water from ions copper (II) were selected. After settling in the solution, a part of coarse dispersed impuritiesremain. They were removed by filtration, which increased the degree of purification up to 99%. Thus, in current research the processes of formation of copper (II) ferrocyanides complexes depending on the pH environment are analyzed, the conditions of reagent treatment of water using Zetag 7547 flocculantare set. The most effective methods of controlling the process of flocculation are shown. The amount of solid waste is reduced.
铜离子水净化试剂方法的优化
几乎每个机械仪表制造企业都存在电化学生产企业的污水,是流入水库重金属的主要来源。最大的兴趣是从铜离子中净化污水(II)。从各种可用的从重金属离子中净化水的方法中,最适合的是传统试剂方法,因为它们用途广泛,易于操作且价格便宜。但它们并不总能提供可接受的浓度。所有这些都需要开发和实施新的现代技术,以确保重金属离子净化过程的高效率。这也提供了创造综合技术的可能性,在其基础上形成一个封闭的水消耗循环。最近,对铁合成酸衍生物的兴趣大大增加;氰化铁具有迅速增长的实用价值。已知重金属氰化铁溶解度很低,因此建议使用氰化铁钾作为沉淀剂,以去除研究溶液中的铜离子。由于铜(II)亚铁氰化物可以形成稳定的胶体体系,沉淀溶液将是一种长期的、技术上并不总是合理的解决方案,因为它不适合作为一种独立的纯化方法。通常,该方法与过滤方法相结合。研究了絮凝剂zetag 7547的絮凝效果。采用亚铁氰化钾和水溶性聚电解质Zetag 7547,研究沉淀法净化污水中铜离子(II)的特性。要实现这一目标,需要解决以下任务:增加沉积反应的深度;加强分散相颗粒的聚集和沉降过程。为获得废水的最佳试剂处理条件,初步研究了pH溶液对形成的铁氰酸铜(II)溶解度的影响。研究表明,Cu (II)沉淀的最佳pH值在6.5 ~ 7.5之间。为加强药剂水净化,建议对其进行处理絮凝处理。在低浓度使用时,Zetag-7547絮凝剂可显著降低水溶液中的亚铁氰化钾。根据所得结果,选择了亚铁氰化钾与絮凝剂的浓度比,并对铜离子(II)的水质进行了净化。在溶液中沉淀后,仍有一部分粗散杂质残留。通过过滤将其去除,使净化度提高到99%。因此,在目前的研究中,分析了铜(II)亚铁氰化物配合物的形成过程对pH环境的影响,并设定了使用Zetag 7547絮凝剂处理水的药剂条件。提出了控制絮凝过程的最有效方法。固体废物的数量减少了。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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