Treatment of waste water containing chromium (VI)

IF 0.3 Q4 CHEMISTRY, MULTIDISCIPLINARY

Chemical Bulletin of Kazakh National University Pub Date : 2020-12-21 DOI:10.15328/cb1113

Kundyz S. Sovetova, A. Ismailova

{"title":"Treatment of waste water containing chromium (VI)","authors":"Kundyz S. Sovetova, A. Ismailova","doi":"10.15328/cb1113","DOIUrl":null,"url":null,"abstract":"In the production of chromium and in the process of transportation of chromiumcontaining materials, contamination of natural waters and soils with chromium compounds inevitably occurs. In this paper, the sorption of chromium (VI) ions with carbon sorbents is studied as a method for treating waste and natural water contaminated with chromiumcontaining compounds. Sorption method of extraction and concentration of elements is one of the most effective and simple technological method of chromium extraction. For extraction of chromium (VI), carbon sorbents obtained from recycling of wheat grains waste (RWGW) (wheat husk or bran) modified with ammonium nitrate were used. RWGW (recycling of wheat grains waste) + NH4NO3 (3%), RWGW (recycling of wheat grains waste) + NH4NO3 (5%), RWGW (recycling of wheat grains waste) + NH4NO3 (7%) were used. Chromium sorption was investigated depending on various factors. It has been established that the most effective sorbent is RWGW (recycling of wheat grains waste) + NH4NO3 (3%), with which it is possible to extract chromium by 98% from solutions at pH=1 in 30 min. This sorbent has been tested for industrial wastewater treatment containing up to 36 mg/L of chromium (VI) ions. The metal recovery rate was 95.2%. The obtained results indicate the prospects of application of RWGW (recycling of wheat grains waste) + NH4NO3 (3%) for wastewater treatment from chromium (VI).","PeriodicalId":9860,"journal":{"name":"Chemical Bulletin of Kazakh National University","volume":" ","pages":""},"PeriodicalIF":0.3000,"publicationDate":"2020-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Chemical Bulletin of Kazakh National University","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.15328/cb1113","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

In the production of chromium and in the process of transportation of chromiumcontaining materials, contamination of natural waters and soils with chromium compounds inevitably occurs. In this paper, the sorption of chromium (VI) ions with carbon sorbents is studied as a method for treating waste and natural water contaminated with chromiumcontaining compounds. Sorption method of extraction and concentration of elements is one of the most effective and simple technological method of chromium extraction. For extraction of chromium (VI), carbon sorbents obtained from recycling of wheat grains waste (RWGW) (wheat husk or bran) modified with ammonium nitrate were used. RWGW (recycling of wheat grains waste) + NH4NO3 (3%), RWGW (recycling of wheat grains waste) + NH4NO3 (5%), RWGW (recycling of wheat grains waste) + NH4NO3 (7%) were used. Chromium sorption was investigated depending on various factors. It has been established that the most effective sorbent is RWGW (recycling of wheat grains waste) + NH4NO3 (3%), with which it is possible to extract chromium by 98% from solutions at pH=1 in 30 min. This sorbent has been tested for industrial wastewater treatment containing up to 36 mg/L of chromium (VI) ions. The metal recovery rate was 95.2%. The obtained results indicate the prospects of application of RWGW (recycling of wheat grains waste) + NH4NO3 (3%) for wastewater treatment from chromium (VI).

查看原文本刊更多论文

含铬废水的处理

在铬的生产和含铬材料的运输过程中，不可避免地会发生铬化合物对天然水体和土壤的污染。本文研究了碳吸附剂对铬（VI）离子的吸附，作为一种处理含铬化合物污染的废物和天然水的方法。元素提取富集吸附法是铬提取中最有效、最简单的工艺方法之一。为了提取铬（VI），使用了从用硝酸铵改性的麦粒废料（RWGW）（麦壳或麸皮）的回收中获得的碳吸附剂。采用RWGW（麦粒废弃物回收）+NH4NO3（3%）、RWGW（小麦废弃物回收）+AH4NO3（5%）、RWGW（小麦废弃物再生）+NH4 NO3（7%）。铬的吸附取决于各种因素。已经确定，最有效的吸附剂是RWGW（麦粒废弃物的回收）+NH4NO3（3%），用它可以在30分钟内从pH=1的溶液中提取98%的铬。该吸附剂已被测试用于处理含有高达36mg/L铬（VI）离子的工业废水。金属回收率为95.2%，表明RWGW（麦粒废弃物回用）+NH4NO3（3%）在铬（VI）废水处理中的应用前景。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Chemical Bulletin of Kazakh National University

自引率

0.00%

发文量

审稿时长

10 weeks