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Bimetallic nanoparticle 1

DDT 1

Hierarchical Cluster Analysis (HCA) 1

Jiulong River 1

Organochlorine pesticides 1

Pearson’s bivariate Correlations Analysis (PCA) 1

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hexachlorocyclohexane (HCH) and dichlorodiphenyltrichloroethan (DDT) 1

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Dechlorination of dichlorodiphenyltrichloroethane (DDT) by Fe/Pd bimetallic nanoparticles: Comparison

Kubra Ulucan-Altuntas, Eyup Debik

Frontiers of Environmental Science & Engineering 2020, Volume 14, Issue 1, doi: 10.1007/s11783-019-1196-2

Abstract: DDT undergoes dechlorination via Fe/Pd bimetallic nanoparticle.The oxidation effect of nZVI on DDT is greatly improved when Pd is dopped.The dechlorination of DDT is more like to DDE via Fe/Pd but to DDD via nZVI.During the study, the Fe/Pd concentration, initial DDT concentration, and contact time were selectedinvestigated to obtain the DDT effluent concentration below the carcinogenesis limit, 0.23 µg/L.

Keywords： Persistent organic pollutants nZVI Bimetallic nanoparticle Organochlorine pesticides DDT

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Concentrations and classification of HCHs and DDTs in soil from the lower reaches of the Jiulong River, China

Jiaquan ZHANG, Shihua QI, Xinli XING, Lingzhi TAN, Wei CHEN, Ying HU, Dan YANG, Chenxi WU

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 2, Pages 177-183 doi: 10.1007/s11783-011-0354-y

Abstract: Soil is an important source to other environmental media and organisms for organochlorine pesticides (OCPs) bioaccumulation. Twenty-four representative surface soil samples were collected from the lower reaches of the Jiulong River, China, in 2009. The concentrations of hexachlorocyclohexane isomers (HCHs) ranged from 0.38 to 39.52 ng·g , with a mean value of 9.51 ng·g . The concentrations of dichlorodiphenyltrichloroethanes (DDTs) and their metabolites were within the ranges of 0.94–700.99 ng·g , with a mean value of 71.17 ng·g . The concentrations of HCHs and DDTs in the soil were lower than the first grade level (50 ng·g ) of the Chinese Environmental Quality Standard (GB15618-1995). Hierarchical Cluster Analysis (HCA) and Pearson’s bivariate Correlations Analysis (PCA) were used to analyse the distribution and contamination levels of OCPs in this region. The results showed that DDTs were the major contaminants and there were no significant correlations between various OCPs concentrations and the total organic carbon (TOC) contents. A significant positive correlation was observed between HCHs and DDTs ( <0.01), which indicates that HCHs and DDTs may have similar sources and fate in the study area.

Keywords： Jiulong River hexachlorocyclohexane (HCH) and dichlorodiphenyltrichloroethan (DDT) classification Hierarchical