检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
机构地区:[1]桂林工学院材料与化学工程系,广西桂林541004 [2]同济大学环境科学与工程学院,长江水环境教育部重点实验室,上海200092
出 处:《中国环境科学》2008年第4期334-339,共6页China Environmental Science
基 金:国家自然科学基金资助项目(20577023)
摘 要:应用微板毒性分析方法,以污染物对淡水发光菌——青海弧菌(Vibrio-qinghaiensissp.)Q67的发光抑制为毒性指标,分别测定了对氯苯酚(P1)、邻氯苯酚(P2)、2,4-二氯苯酚(P3)、间甲苯酚(P4)、对甲苯酚(P5)、间硝基苯酚(P6)、2-硝基苯酚(P7)、对甲苯胺(P8)、P9、邻硝基苯胺(P10)、邻氯苯胺(P11)、间氯苯胺(P12)对Q67的毒性.结果表明,12种污染物的剂量-效应关系除了P11可用Logit模型描述外,其余11种污染物均可用Weibull模型有效描述.由模型估算的半数效应浓度负对数值(pEC50)分别为3.43,2.81,3.66,2.83,2.99,3.15,3.20,2.52,2.36,3.66,2.81,2.89,其对Q67的毒性大小顺序为(P3=P10)>P1>P7>P6>P5>P12>P4>(P11=P2)>P8>P9.分别设计浓度为各自EC10和EC50的2个等效应浓度比混合物和12个均匀设计浓度比混合物进行微板毒性实验,并应用剂量加和(DA)模型与独立作用(IA)模型建立由单一毒物的剂量-效应参数来预测混合物联合毒性的方法.结果表明,在实验浓度范围内各混合物毒性均能用DA模型精确预测.Using the microplate toxicity analysis, the toxicities of 7 phenolic and 5 aniline derivatives (PADs) inhibiting the luminescence of freshwater photobacteria, Vibrio-qinghaiensis sp--Q67, were determined, respectively. The doseresponse data of all PADs but o-chloroaniline (Pll) can be effectively described by Weibull function. The pECs0 values of 12 PADs, p-chlorophenol(Pl), o-chloropheno (P2), 2,4-dichlorophenol(P3), m-cresol(P4), p-cresol(P5), m-nitrophenol(P6), o-nitrophenol(PT), p-methylaniline (PS), o-methyl-aniline(P9), o-nitroaniline(P 10), o-chloroaniline(P 11 ), and p-chloroaniline(P 12), estimated from the optimal dose-response curves described by Weibu11 or Logit function (Pll) were 3.43, 2.81, 3.66, 2.83, 2.99, 3.15, 3.20, 2.52, 2.36, 3.66, 2.81, and 2.89 (unit of concentration: mol/L), respectively, which revealed that the toxic order among 12 PADs was (P3 = P10) 〉 P1 〉 P7 〉 P6 〉 P5 〉 P12 〉 P4 〉 (Pll -- P2) 〉 P8 〉 P9. 14 mixtures consisted of all 12 PADs were constructed using the effect-equivalent concentration (.ECso or EClo) method and uniform design. The toxicities of the mixtures were determined using the same procedure as the individual PAD compound and the dose-response data were then fitted to Weibull or Logit function. At the same time, a dose addition (DA) and independent action (IA) models were employed to predict the joint toxicities of the mixtures from the dose-response information of various individual PAD compounds. The results showed that the toxicities of mixtures can be accurately evaluated by the DA model.
关 键 词:联合毒性 浓度加和 独立作用 苯酚衍生物 苯胺衍生物 发光菌
分 类 号:X503.225[环境科学与工程—环境工程]
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:216.73.216.38