焦化废水中不同极性组分的光谱分析及可生物降解特性
Spectral analysis and biodegradation characteristics of different polar fractions in coking wastewater
查看参考文献36篇
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文摘
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焦化废水是典型难降解工业有机废水,构成其成分的复杂及种类的繁多使其难以实现高效的生物降解过程,制约了水处理的水质达标.为了探明其中生物降解强抑制组分,采用DAX-8大孔树脂将焦化废水分离出疏水酸性组分(HOA) 、疏水碱性组分(HOB) 、疏水中性组分(HON)和亲水性组分(HIS)等4种极性不同的组分,分析了各组分的有机物含量分布,紫外吸收光谱和三维荧光光谱,并用两种方法考察了各组分的可生物降解性能.结果表明,HOA是主要的有机组分,其COD和TOC分别占比55.9%和56.8%; HOA也是主要的芳香物质及荧光组分,而HON是芳香构造化程度最高和类腐殖质占比P_((Ⅲ+Ⅴ))最高的组分;各组分的BOD_5 /COD值及脱氢酶活性的抑制结果显示其难降解程度依次为HON>HOB>HIS>原水>HOA,而HON是焦化废水中生物抑制最强组分,其BOD_5 /COD值仅为0.21 ± 0.02,对脱氢酶活性的抑制达到38.5%; SUVA和P_((Ⅲ+Ⅴ))与可生物降解性的关联分析发现,焦化废水中难降解组分并不都是芳香性化合物造成的,类腐殖质对其中难降解有机组分的指示作用相比SUVA更加灵敏. |
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其他语种文摘
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Coking wastewater is a typical refractory industrial organic wastewater with complicated composition; efficient biodegradation of coking wastewater is hard to achieve,thus making its effluent hard to meet the discharge standard. In order to ascertain its refractory components,DAX-8 resin was applied to separate coking wastewater into four different polar fractions: hydrophobic acids (HOA),hydrophobic bases (HOB),hydrophobic neutrals (HON) and hydrophilic substances (HIS). Then the organic content distribution,UV absorption spectra,three-dimensional fluorescence excitationemission matrix (3D EEMs) of each polar fractions were analyzed and their biodegradability was evaluated. The results showed that HOA was the main organic component,accounting for 55.9% and 56.8% of the total COD and TOC,respectively. HOA was also a major constituent of aromatic and fluorescent substances,but HON had the highest degree of aromatic structure and proportion of humic-like substances P_((Ⅲ+Ⅴ)). The BOD_5 /COD values and the dehydrogenase activity inhibition of different polar fractions showed that the order of refractory degree was HON > HOB > HIS> raw water > HOA. It was found that HON was the most refractory component for biodegradation inhibition in coking wastewater,whose BOD_5 /COD value was only 0.21 ± 0.02 and the inhibition degree of dehydrogenase activity reached 38.5%. The correlations among SUVA,P_((Ⅲ+Ⅴ)) and biodegradability revealed that not all refractory substances in coking wastewater were aromatic compounds,while humic-like matter (Ⅲ+Ⅴ) was more sensitive to indicate refractory substances compared to SUVA. |
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来源
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环境科学学报
,2016,36(3):900-906 【核心库】
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DOI
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10.13671/j.hjkxxb.2015.0431
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关键词
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焦化废水
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极性
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光谱学
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可生物降解性
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脱氢酶活性
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地址
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1.
华南理工大学环境与能源学院, 广州, 510006
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中国科学院广州地球化学研究所, 广州, 510640
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华南理工大学环境与能源学院, 工业聚集区污染控制与生态修复教育部重点实验室, 广州, 510006
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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0253-2468 |
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学科
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行业污染、废物处理与综合利用 |
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基金
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国家自然科学基金项目
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广东省教育厅学科建设专项资金项目
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文献收藏号
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CSCD:5653612
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