摘要
针对丁苯橡胶污水综合治理过程中涉及的污水毒性问题,开展了基于活性污泥呼吸速率法的污水毒性测定和评价研究。首先,测定了不同浓度梯度下丁苯橡胶污水对活性污泥的呼吸抑制率和生物毒性,结果表明,丁苯橡胶污水对活性污泥呼吸速率抑制率达到52.69%,对硝化菌呼吸作用的抑制率达到99.88%,3 h-EC_(50)值为76.89%,TU为1.30,生物毒性等级为中毒。其次,采用气相色谱-质谱联用技术,对污水中有机物进行了检测,筛选出丰度较高且具有代表性的10种物质,将其作为引起污水毒性来源的考察物。最后,对筛选的物质进行了活性污泥呼吸抑制实验,取得相应的呼吸抑制率、3 h-EC_(50)及对活性污泥致毒性的浓度阈值。结果表明,筛选的物质中2,6-二异丙基苯酚、4-叔丁基苯磺酰胺、苯乙酮、苯甲醛、2-乙基己醇和邻苯二甲酸二异丁酯活性污泥活性具有明显抑制性,而2,4-二叔丁基苯酚、苯乙烯、棕榈酸和八甲基环四硅氧烷的抑制作用不明显。
Aiming at the toxicity associated with the comprehensive management of styrene-butadiene rubber(SBR)wastewater,the toxicity measurement and evaluation based on activated sludge respiration rate method are studied.Firstly,the respiratory inhibition rate and biotoxicity of SBR wastewater on activated sludge are determined at different concentration gradients.The results indicate that the inhibition rate of SBR wastewater on the respiration speed of activated sludge reaches 52.69%,and that on the respiration action of nitrifying bacteria reaches 99.88%.The 3h-EC_(50) value is 76.89%,TU is 1.30,and the biotoxicity level represents poisoning.Secondly,the gas chromatography-mass spectrometry(GC-MS)technique is employed to detect organics in the wastewater,and 10 kinds of substances with high abundance and representativeness are selected out as the investigated substances for identifying the sources of wastewater toxicity.Finally,the activated sludge respiratory inhibition test is conducted on the selected substances to obtain the corresponding respiratory inhibition rate,3h-EC_(50) and concentration thresholds for poisoning activated sludge.It is indicated that among the selected substances,2,6-diisopropylphenol,4-tert-butylbenzenesulfonamide,acetophenone,benzaldehyde,2-ethylhexanol,and diisobutyl phthalate exhibit significant inhibitory effects on the activity of activated sludge,while 2,4-di-tert-butylphenol,styrene,palmitic acid,and octamethyl cyclotetrasiloxane have not significant inhibitory effects.
作者
荆钰
郭廷雪
王永亨
刘彦平
孙子茹
林子昕
别海燕
安维中
JING Yu;GUO Ting-xue;WANG Yong-heng;LIU Yan-ping;SUN Zi-ru;LIN Zi-xin;BIE Hai-yan;AN Wei-zhong(College of Chemistry and Chemical Engineering,Ocean University of China,Qingdao 266100,China;Rubber Operation Division,PetroChina Lanzhou Petroleum Company,Lanzhou 730060,China)
出处
《现代化工》
北大核心
2025年第11期256-261,共6页
Modern Chemical Industry
关键词
丁苯橡胶
橡胶污水
活性污泥呼吸速率
毒性评估
styrene-butadiene rubber
rubber wastewater
activated sludge respiration rate
toxicity assessment
