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Detection of health hazard insecticide dichlorodiphenyltrichloroethane (DDT) in some common marine dry fish samples from Bangladesh

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Health 2012年第4期4卷 185-189页

作者： Mohammad Abdul Momin Siddique Mahbuba Aktar Institute of Marine Science and Fisheries University of Chittagong Chittagong Bangladesh Norwegian College of Fishery Science University of Tromso Tromso Norway

Objectives: The general purpose of this study is to detection and determination of the concentration level of dichlorodiphenyltrichloroethane (DDT) in some commercially available marine dry fishes and to investigate the contamination status of dichlorodiphenyltrichloroethane (DDT) of these dry fishes. Methods: Samples were collected from six largest dry fish markets (three from Chittagong district and three from Cox’s Bazar district) and four types of dry fishes were taken in this study are Ribbon fish (Lepturacanthus savala), Sin Croaker (Johnius dussumieri), Bombay duck (Harpodon nehereus) and Shrimp (mixed species). Total numbers of samples were 24 that were analyzed in the laboratory. Results: The results of the study show that the mean concentrations of dichlorodiphenyltrichloroethane (DDT) in the samples of Ribbon fish, Bombay duck and Sin croaker were ranged between 130.85 - 153.47ppb, 125.21 - 181.4ppb and 119.86 – 208.65ppb respectively. The mean concentrations of dichlorodiphenyltrichloroethane (DDT) were found at a lower amount in shrimp sp. than the other. Conclusions: This result indicates that the concentration of dichlorodiphenyltrichloroethane (DDT) in dry fish samples from Bangladesh are higher and may causes chronic disease and potential long-term risk for human health.

关键词： Dry Fish dichlorodiphenyltrichloroethane (DDT) Organochlorine Insecticide Bangladesh

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Organochlorine Pesticides(OCPs) in Soils Along the Eastern Slope of the Tibetan Plateau

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Pedosphere 2010年第5期20卷 607-615页

作者： XING Xin-Li QI Shi-Hua ZHANG Yuan YANG Dan J. O. ODHIAMBO Key Laboratory of Biogeology and Environmental Geolagy of Ministry o.f Education China University of Geosciences Wuhan 430074 (China) School of Environmental Studies China University of Gcosciences Wuhan 430074 (China)

Soil samples collected from several sites along an altitudinal transect on the eastern slope of the Tibetan Plateau were analyzed for hexachlorobenzenes(HCHs) and dichlorodiphenyltrichloroethanes(DDTs).The results showed that HCHs and DDTs were found in the soil samples from the remote high altitude areas away from source regions,which confirmed the long-range atmospheric transport phenomenon of these organochlorine pesticides(OCPs) *** OCP concentrations in the soils had a significant negative correlation with altitude;they showed a trend to increase with decreasing altitude,but the increase was not continuous,being interrupted at some moderate-altitude sites on the *** distances from the source region,landforms,soil properties,and physical-chemical properties of OCPs were more important than total organic carbon content to the distribution of OCPs in soils disturbed by human *** analysis of the compositions of HCH isomers and DDTs revealed predominantly low ratios of α-HCH to γ-HCH,ranging from 0.06 to 4.79,which suggested current lindane *** the other hand,low p,p-DDT/p,p-DDE and o,p-DDT/p,p-DDT ratios were observed,indicating mainly aged historical DDT residues in the study area.

关键词： altitude dichlorodiphenyltrichloroethane hexachlorobenzene long-range atmospheric transport

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Remediation of Organochlorine Pesticide-Contaminated Soils by Surfactant-Enhanced Washing Combined with Activated Carbon Selective Adsorption

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Pedosphere 2019年第3期29卷 400-408页

作者： ZHANG Shengtian HE Yue WU Linna WAN Jinzhong YE Mao LONG Tao YAN Zhou JIANG Xin LIN Yusuo LU Xiaohua College of Resources and Environmental Sciences Nanjing Agricultural University Nanjing 210095 (China) State Environmental Protection Key Laboratory of Soil Environmental Management and Pollution Control Nanjing Institute of Environmental Science Ministry of Environmental Protection of China Nanjing 210042 (China) Environmental Science Research Institute Huazhong University of Science and Technology Wuhan 430074 (China) State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil Science Chinese Academy of Sciences Nanjing 210008 (China)

Remediation of organochlorine pesticide (OCP)-contaminated soils is urgently required especially in China. The present study investigated the removal of OCPs from two soils by triton X-100 (TX- 100)-enhanced washing coupled with powdered activated carbon (PAC) adsorption treatment of the solution. Two contaminated soils, including a silt clay contaminated w计h chlordene, dichloro- 2,2-6is(p-chlorophenyl)ethanes (DDDs), and dichlorodiphenyltrichloroethane (DDT) and a sandy loam containing chlordanes and mirex, were selected. Effects of varied operating parameters, including TX-100 dosage, liquid/soil (L/S) ratio, and extraction time, on the contaminant removal were examined. For both soils, OCP removal was clearly enhanced with increasing TX-100 in extraction solution and L/S ratio. Meanwhile, the removal efficacy was also impacted by soil texture and characteristics and contents of the contaminants. Moreover, by using PAC as an absorbent, a significant decrease in the contaminants in the extraction solutions was detected, and TX-100 could be further reused. Our investigation suggests that surfactant-enhanced washing combined with activated carbon selective adsorption would be an alternative to remediate OCP-contaminated soils.

关键词： chlordene dichlorodiphenyltrichloroethane hydrophobic organic chemicals powdered activated carbon sodium dodecyl benzene sulfonate triton X-100

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Use of Organic Solvents to Extract Organochlorine Pesticides (OCPs) from Aged Contaminated Soils

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Pedosphere 2013年第1期23卷 10-19页

作者： YE Mao YANG Xing-Lun SUN Ming-Ming BIAN Yong-Rong WANG Fang GU Cheng-Gang WEI Hai-Jiang SONG Yang WANG Lei JIN Xin JIANG Xin State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil Science Chinese Academy of Sciences

Problems associated with organochlorine pesticide （OCP）-contaminated sites in China have received wide attention. To solve such problems, innovative ex-situ methods of site remediation are urgently needed. We investigated the feasibility of the extraction method with different organic solvents, ethanol, 1-propanol, and three fractions of petroleum ether, using a soil collected from Wujiang （W J）, China, a region with long-term contamination of dichlorodiphenyltrichloroethanes （DDTs）. We evaluated different influential factors, including organic solvent concentration, washing time, mixing speed, solutiomto-soil ratio, and washing temperature, on the removal of DDTs from the WJ soil. A set of relatively better parameters were selected for extraction with 100 mL L-1 petroleum ether （60-90 ℃）： washing time of 180 min, mixing speed of 100 r min-I, solution-to-soil ratio of 10：1, and washing temperature of 50 ℃. These selected parameters were also applied on three other seriously OCP-polluted soils. Results demonstrated their broad-spectrum effectiveness and excellent OCP extraction performance on the contaminated soils with different characteristics.

关键词： dichlorodiphenyltrichloroethane ex-situ soil washing extraction performance petroleum ether site remediation

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