Cd²⁺和Cu²⁺对泥蚶的急性毒性和联合毒性试验   总被引：1，自引：0，他引：1  

王召根  吴洪喜  王瑶华  周朝生  陈肖肖 《海洋科学》2014,38(8):16-20

为了解重金属Cd2+和Cu2+对泥蚶的毒害程度和泥蚶对重金属Cd2+和Cu2+的解毒能力,用毒理学实验方法研究了Cd2+和Cu2+对泥蚶(Tegillarca granosa)的急性毒性和联合毒性效应。结果表明:Cd2+、Cu2+对泥蚶的96 h半致死质量浓度分别为6.189、0.460 mg/L;安全质量浓度分别为0.062、0.005 mg/L;相对毒性Cu2+Cd2+。在1︰1毒性单位的联合作用下,Cd2+和Cu2+对泥蚶96 h的半致死质量浓度分别为1.984、0.147 mg/L;安全质量浓度分别为0.020、0.001 mg/L。2种重金属离子的联合毒性大于任一重金属离子的毒性,联合毒性表现为协同作用。  相似文献   

Copper accumulation and transport in a marine food chain composed ofPlatymonas subcordiformis, brachionus plicatilis andPenaeus monodon     

Cai A-gen  Chen Wei-qi  Li Wen-quan 《中国海洋湖沼学报》1997,15(3):205-211

Accumulation, transport and toxicity of Cu in the food chain consisting ofPlatymonas subcordiformis, Brachionus plicatilis andPenaeus monodon were studied. Effects of Cu on the growth of organisms in the food chain were investigated and the inhibiting effect concentration (EC₅₀) of Cu was then determined according to the dynamics of the relative number of cells or total individuals of organisms, expressed in percentages with reference to the controlled system, under different culture conditions. On the basis of the variations in accumulation and percentages of accumulation of Cu in the biological phase, the relationship between the accumulation of Cu in organisms and its toxicity was analyzed and the main approach for determining the transport of Cu in the food chain was then discussed. Project 3880644 supported by NSFC.  相似文献   

Distribution of the toxic dinoflagellate Gonyaulax tamarensis in the Southern New England Region     

D.M. Anderson  D.M. Kulis  J.A. Orphanos  A.R. Ceurvels 《Estuarine, Coastal and Shelf Science》1982,14(4):447-458

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COPPER ACCUMULATION AND TRANSPORT IN A MARINE FOOD CHAIN COMPOSED OF PLATYMONAS SUBCORDIFORMIS, BRACHIONUS PLICATILIS AND PENAEUS MONODON   总被引：2，自引：1，他引：1  

蔡阿根  陈伟琪  李文权 《中国海洋湖沼学报》1997,(3)

mooimON~ofheaVyInetalpollutantsonmarineorganismswereextenSivelystudedguiAgenetal.,l99l,LiuFayietal.,l988,PatinS.A.,l982).bouseofthemarineansySteIncomPlexityandthevarietyofthefoodchain,pollutantSaretIanspondindiliferentwayS-Therefore,studyofthetIansPortofPonutantsinthefoodchainhasdrawnmuchattention.TherearerePortSontheaCCUInulatinnandusnsportofsorneradi0nuclidesguiFulongetal.,l984)suchasCs,Co,andZnandsometIaceelernentSsuchasV,SeandNinthernarinefoodchain(Mthemand,Ctal.,l98O;Unsal,…  相似文献   

应用毒性淋溶提取法评价天津市某工业用地及周围农田土壤中重金属生态风险     

王静  吴宇峰  王斌  张磊  王鑫  赵一 《岩矿测试》2015,34(4):464-470

毒性淋溶提取法(TCLP)是美国法定的一种生态环境风险评价方法,通过提取土壤中的重金属有效态判断土壤重金属污染状况和评估污染区域生态风险。本文应用TCLP法提取天津市某工业园区内及周围农田土壤中的有效态Cu、Pb、Zn、Cd,采用电感耦合等离子体质谱法和原子吸收光谱法分别测定重金属全量和有效态,结合单项污染指数和内梅罗综合污染指数评价了重金属生态风险。结果表明:研究区Zn是首要污染物,主要来源于镀锌厂、金属制品厂和电镀厂,其次是Pb和Cu污染,Cd无污染;Pb、Zn可能具有同源性或伴生关系;大部分土壤处于安全水平,重金属污染率不到30%,但农田土壤出现了Zn的轻度污染。重金属全量是影响重金属有效态含量较大的因素,当Zn全量大于环境质量标准限值(300 mg/kg),Pb全量大于80mg/kg时,有效态Zn、Pb与其全量均呈正相关。因此,可以使用TCLP法将土壤重金属全量与有效态进行量化评价重金属生态风险。  相似文献   

污泥/煤流化床混烧底灰中的重金属毒性研究     

赵晓莉  朱伟  徐德福  邱林倩  张超  杨创 《南京气象学院学报》2013,5(3):244-250

研究了污泥与煤按不同质量比例混烧后,底灰中的重金属形态分布与浸出毒性.结果表明:30:70的泥煤比使底灰中重金属硫化物及有机态和残渣态所占比例最大,即生物无效部分比例最大;在浸出毒性实验中,30:70的泥煤比使底灰重金属浸出量最小.由此推出,对环境毒害程度最小的泥煤质量比为30:70,即该实验条件下最优泥煤质量比为30:70.  相似文献   

Optimization of streamflow measurements by the dilution of the food colorant E110 / Optimisation de la mesure de débit par dilution du colorant alimentaire E110     

《水文科学杂志》2013,58(3):474-483

Abstract

This study presents the measurement of streamflows by constant dilution of a yellow-orange food colorant (E110). Field measurements are carried out in the Doria River, a mountain torrent in the Savoie pre-Alps, France. A limnimetric station installed 12 years ago is periodically calibrated by mechanical and chemical measurements. Moreover, simultaneous mechanical and chemical methods allow the statistical validation of the proposed technique. The main advantages of this method are the lack of toxicity, the absence of visible river colouring, comparable to that of aquatic organic matter, and the low detection limit. This method allows high flow measurement under suitable conditions.  相似文献   

Changes in the Level of Proteins,Free Amino Acids and Protease Activities of Clarias batrachus in Response to Sodium meta‐arsenite Intoxication     

Randhir Kumar  Tarun K. Banerjee 《洁净——土壤、空气、水》2013,41(12):1196-1200

Increased hazard of arsenic toxicity at many provinces of India causing extensive contamination of their wetlands. To illustrate the consequences of the arsenic menace on the aquatic fauna, a nutritionally important freshwater catfish Clarias batrachus (Linn.) was subjected to the stress of sublethal concentration (1 mg/L; 5% of 96‐h LC₅₀ value) of sodium meta‐arsenite. The alterations induced by the arsenic salt on certain biomolecules (proteins, free amino acids (FAA), and protease activities) in five tissue components (muscle, liver, brain skin, and gills) of the fish using biochemical techniques were estimated. Significant (p < 0.01) decrease in the concentration of proteins in all the tissues (19.74–44.84% in muscles; 3.17–49.39% in liver; 10.05–36.16% in brain; 12.62–52.01% in skin and 7.34–61.69% in gills), and significant (p < 0.01) increase in FAA (6.84–269.89% in muscles; 125.89–358.03% in liver; 1.07–152.90% in brain; 29.31–401.62% in skin and 38.53–165.07% in gills), and protease activities (43.59–183.33% in muscles; 19.52–131.90% in liver; 8.85–46.72% in brain; 33.33–261.53% in skin and 25.39–50.79% in gills) of the exposed fish were observed. This increase in amino acids and enzyme activity point out toward breakdown of protein leading to their depletion.  相似文献   

Toxicity of Arsenic to Photobacterium phosphoreum,Daphnia magna,and Danio rerio at Different pH Levels          下载免费PDF全文

Qun He  Ruijuan Qu  Xinghao Wang  Zhongbo Wei  Ping Sun  Zunyao Wang 《洁净——土壤、空气、水》2016,44(1):72-77

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亚硝酸氮对红鳍东方[鱼屯]的毒性效应     

汪家鑫  张钊  胡盼  姜志强  王鑫  杨晶晶  王双耀 《广东海洋大学学报》2013,(6):52-56

采用半静水生物测试法,研究亚硝酸盐氮对红鳍东方[鱼屯]（Takifugu rubripes）（95～9．8g）的急性毒性及对部分肝脏抗氧化酶活性的影响。结果表明,在急性毒性实验中,亚硝酸盐氮对红鳍东方[鱼屯]的24、48、72和96h半致死质量浓度（LC50）分别为20188、19057、17109、15925mg／L,安全质量浓度为1592mg／L;在亚急性毒性实验中,当红鳍东方纯分别在5．3、106,159、212mg／L亚硝酸盐氮中暴露4周时,其肝脏总抗氧化能力（T—AOC）、超氧化物歧化酶（SOD）和过氧化氢酶（CAT）活性随亚硝酸盐氮浓度的升高均被显著抑制,差异有统计学意义（P〈0.05）,表明亚硝酸盐氮会对鱼体的抗氧化能力产生影响。  相似文献