焦化废水硫氰化物检测过程中氰络合物的硫酸锌屏蔽作用

陈啊聪; 韦托; 覃智; 陈尧; 徐蕊; 吴海珍; 韦朝海

doi:10.13205/j.hjgc.202305018

焦化废水硫氰化物检测过程中氰络合物的硫酸锌屏蔽作用

doi: 10.13205/j.hjgc.202305018

陈啊聪¹,
韦托¹,
覃智¹,
陈尧¹,
徐蕊²,
吴海珍²,
韦朝海^1, ,

1. 华南理工大学环境与能源学院, 广州 510006;
2. 华南理工大学生物科学与工程学院, 广州 510006

基金项目:

广东省科技计划项目(2018A050506009)

国家自然科学基金(42277379、U1901218)

详细信息

作者简介:
陈啊聪(1992-),男,博士研究生,主要研究方向为焦化废水处理技术。chenacong@126.com

通讯作者:
韦朝海(1962-),男,博士,教授,主要研究方向为水污染控制理论与技术。cechwei@scut.edu.cn

计量
- 文章访问数: 74
- HTML全文浏览量: 6
- PDF下载量: 3
- 被引次数: 0
出版历程
- 收稿日期: 2022-08-31

SHIELDING EFFECT OF ZINC SULFATE ON CYANIDE COMPLEX DURING THIOCYANIDE DETECTION FOR COKING WASTEWATER

1. School of Environment and Energy, South China University and Technology, Guangzhou 510006, China;
2. School of Biology and Biological Engineering, South China University and Technology, Guangzhou 510006, China

摘要

摘要: 焦化废水中含有大量的氰化物(CN^-)和硫氰化物(SCN^-)等有毒有害污染物,在预处理过程中,一般采用硫酸亚铁(FeSO₄)混凝沉淀去除硫化物(S^2-)、油分、悬浮物并降低废水毒性。上述过程同时会形成亚铁氰化物([Fe(CN)₆]^4-),[Fe(CN)₆]^4-再与Fe³⁺形成亚铁氰化铁沉淀(普鲁士蓝,Fe₄[Fe(CN)₆]₃),干扰硫氰酸铁(Fe(SCN)₃)分光光度法对SCN^-检测的准确性。为解决上述问题,提出在SCN^-显色前加入硫酸锌(ZnSO₄)的方法,屏蔽过量的[Fe(CN)₆]^4-,并分析ZnSO₄对SCN^-检测的影响程度。结果表明:Fe(SCN)₃-ZnSO₄分光光度法能屏蔽工业废水中[Fe(CN)₆]^4-和大部分金属氰络合物的干扰,从而能快速准确地测定SCN^-。方法中SCN^-适用质量浓度为0.2~34.8 mg/L,统计方差为1.86%,回收率达到94%~103%。该方法适用于多点多频率采样分析,可为工业废水SCN^-的现场监测提供一种新手段。
- 焦化废水 /
- 硫氰化物 /
- 氰化物 /
- 普鲁士蓝 /
- 硫酸锌 /
- 屏蔽作用
Abstract: Coking wastewater contains a large amount of cyanide (CN^-) and thiocyanide (SCN^-) and other toxic and harmful pollutants. In the pretreatment process prior to the biological process, generally, ferrous sulfate (FeSO₄) was used to coagulate and precipitate sulfide, oil, and suspended matter to reduce the toxicity of wastewater. At the same time, ferrocyanide ([Fe(CN)₆]^4-) was formed, and then [Fe(CN)₆]^4- was combined with Fe³⁺ to form iron ferrocyanide precipitation (Prussian blue, Fe₄[Fe(CN)₆]₃), which interfered with the accuracy of ferric thiocyanate [Fe(SCN)₃] spectrophotometric method for SCN^- detection. To solve the above problems, it was proposed that zinc sulfate (ZnSO₄) should be added to shield excessive [Fe(CN)₆]^4- before Fe(SCN)₃ color development; moreover, the influence of ZnSO₄ on the analysis and detection of SCN^- was analyzed. The results showed that the Fe(SCN)₃-ZnSO₄ spectrophotometry could shield the interference of [Fe(CN)₆]^4- and most metal cyanide complexes in industrial wastewater, so that SCN^- can be determined quickly and accurately. The applicable concentration range of this method was 0.2~34.8 mg/L of SCN^-, the statistical variance was 1.86%, and the recovery rate was 94%~103%. This method is suitable for multi-point and multi-frequency sampling analysis, and is a novel method for the site monitoring of SCN^- in industrial wastewater.
- coking wastewater /
- thiocyanate /
- cyanide /
- Prussian blue /
- zinc sulfate /
- shielding effect

HTML全文

参考文献(29)

[1]	高富聪, 陈国宝, 马云瑞, 等. 废水中硫氰酸根的脱除研究现状[J]. 有色金属(冶炼部分), 2021(3): 143-154.
[2]	孙晓雪, 韦聪, 罗培, 等. OHO-MBR组合工艺处理实际焦化废水的可行性[J]. 环境工程学报, 2021, 18(8): 2759-2769.
[3]	WEI C H, LI Z M, PAN J X, et al. An Oxic-Hydrolytic-Oxic process at the nexus of sludge spatial segmentation, microbial functionality, and pollutants removal in the treatment of coking wastewater[J]. ACS EST Water, 2021, 1: 1252-1262.
[4]	武恒平, 韦朝海, 任源, 等. 焦化废水预处理及其特征污染物的变化分析[J]. 化工进展, 2017, 36(10): 3911-3920.
[5]	NELSON L. Acute cyanide toxicity: mechanisms and manifestations[J]. Journal of Emergency Nursing, 2006, 32(4): 8-11.
[6]	MARCIN M. Theoretical modeling of structure-toxicity relationship of cyanides[J]. Toxicology Letters, 2021, 349(1): 30-39.
[7]	黄会静, 韦朝海, 吴超飞, 等. 焦化废水生物处理A/O/H/O工艺中氰化物的去除特性[J]. 化工进展, 2011, 30(5): 1141-1146.
[8]	卢永, 申世峰, 严莲荷, 等. 焦化废水生化处理研究新进展[J]. 环境工程, 2009, 27(4): 13-16.
[9]	刘国新, 吴海珍, 孙胜利, 等. 市政污泥接种焦化废水好氧降解能力及微生物群落演替的响应分析[J]. 环境科学, 2017, 38(9): 3807-3815.
[10]	肖小双, 安雪姣, 叶晗媛, 等. 废水中硫氰酸盐的微生物降解研究进展[J]. 生物技术通报, 2021, 37(2): 224-235.
[11]	刘显清, 吴海珍, 李国保, 等. 化学沉淀结合Fenton法预处理脱硫废液的原理与效果分析[J]. 环境化学, 2012, 31(10): 1527-1534.
[12]	米玉辉, 孙慧霞. 焦化废水处理技术进展与发展方向[J]. 山西化工, 2021(1): 215-217.
[13]	刘欢, 邱德跃, 张燕, 等. 硫氰化物废水处理的研究进展[J]. 精细化工中间体, 2015, 45(5): 1-4.
[14]	SRIRAMOJU S K, DASH P S, MAJUMDAR S. Meso-porous activated carbon from lignite waste and its application in methylene Blue adsorption and coke plant effluent treatment[J]. Journal of Environmental Chemical Engineering, 2021,9(1): 104784.
[15]	仲崇波, 王成功, 陈炳辰. 氰化物的危害及其处理方法综述[J]. 金属矿山, 2001(5): 44-47.
[16]	朱洪威, 石旭, 崔韬, 等. "铁络合-生物法"组合工艺降解有机、无机氰[J]. 环境与发展, 2019, 31(2): 59-61.
[17]	KONG Q P, LI Z M, ZHAO Y S, et al. Investigation of the fate of heavy metals based on process regulation-chemical reaction-phase distribution in an A-O₁-H-O₂ biological coking wastewater treatment system[J]. Journal of Environmental Management, 2019, 247: 234-241.
[18]	YU X B, XU R H, WEI C H, et al. Removal of cyanide compounds from coking wastewater by ferrous sulfate: improvement of biodegradability[J]. Journal of Hazardous Materials, 2016, 302: 468-474.
[19]	国家生态环境部. 水质硫氰酸盐的测定异烟酸-吡唑啉酮分光光度法:GB/T 13897—1992[S]. 北京: 北京标准出版社, 1992.
[20]	张宁, 周鑫, 张养东, 等. 乳中硫氰酸钠检测方法研究进展[J]. 质量安全, 2020(9): 62-65.
[21]	王永强. 离子色谱法快速测定水和污水中的硫氰酸盐[J]. 环境工程, 1991, 9(1): 28-30.
[22]	葛仲义, 陈永红, 王菊, 等. 含硫化物、硫氰酸盐水质中易释放氰化物测定方法研究[J]. 分析测试, 2021, 42(2): 90-93.
[23]	潘霞霞, 黄会静, 冯春华, 等. 焦化废水中硫氰化物的快速检测方法[J]. 煤化工, 2011, 39(1): 15-18.
[24]	沈健, 赵赫, 李玉平, 等. 新型脱氰剂处理焦化废水深度脱氰混凝工艺的应用研究[C]//中国环境科学学会学术年会论文集(第3卷). 2012: 1783-1788.
[25]	国家质量监督局. GB/T 601-2016, 化学试剂标准滴定溶液的制备[S/OL]. 中国: 中华人民共和国国家标准, 2016. https://openstd.samr.gov.cn/bzgk/gb/newGbInfo?hcno=B15F965BD56094 DA3969C1B863811AEF.
[26]	DE BERG K, MAEDER M, CLIFFORD S. A new approach to the equilibrium study of iron(Ⅲ) thiocyanates which accounts for the kinetic instability of the complexes particularly observable under high thiocyanate concentrations[J]. Inorganica Chimica Acta, 2016, 445: 155-159.
[27]	DEAN J A. 兰氏化学手册[M]. 2版. 魏俊发, 译. 北京: 科学出版社. 2000.
[28]	李湘溪, 吴超飞, 吴海珍, 等. 焦化废水处理过程中盐分变化及其影响因素[J]. 化工进展, 2016, 35(11): 3690-3700.
[29]	蒋洪圻, 徐光宪. 硫氰酸镉络合物的极谱研究[J]. 科学通报, 1957(1): 12-13.