Occurrence of organochlorine insecticides, PCBs and PCB congeners in waters and sediments of the Ebro River (Spain)

Fernández, M. A.; Alonso, Cristina; González, María José; Hernández, L. M.

doi:10.1016/s0045-6535(98)00167-2

Cited by 139 publications

(52 citation statements)

References 22 publications

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“…This is not surprising as the annual pesticide application in the Pearl River watershed (37 kg/ha) was five times the national average from 1980 to 1995 (Zhang et al, 2002). Globally, the levels of HCHs and DDTs detected in the Yangtze River (0.6e28.1 and nde16.7 ng/L, respectively), Yellow River (0.7e48.1 and 0.06e10.8 ng/L) and Pearl River (0.50e14.8 and 1.1e19.6 ng/L) were comparable to the concentrations obtained from Ebro River (0.2e28.6 and 2e6.8 ng/L) in Spain (Fernández et al, 1999) and Mumbai (0.2e15.9 and 3.0e33.2 ng/L) in India (Pandit et al, 2006) but were an order of magnitude lower than those in Red River (nde96.7 and ndÀ324 ng/L) in Vietnam (Hung and Thiemann, 2002) and Küçük Menderes River (187e337 and 72e120 ng/L) in Turkey (Turgut, 2003) (Table S1). Thus, the levels of HCHs and DDTs in China's rivers were generally similar to those in developed but less than those in rapidly developing and/or agriculturally based nations across the globe.…”

Section: Riverssupporting

confidence: 61%

China's water pollution by persistent organic pollutants

Bao

Maruya

Snyder

et al. 2012

Environmental Pollution

205

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Section: Riverssupporting

confidence: 61%

China's water pollution by persistent organic pollutants

Bao

Maruya

Snyder

et al. 2012

Environmental Pollution

205

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“…∑DDT concentrations in surface water samples were higher than that in Ebro River, Spain (3.40 ug/L) (Fernandez et al, 1999), while lower than those in the Yangtze River (nd-16.71 ug/L) (Tang et al, 2008), Huaihe River (4.44-33.59) (Feng et al, 2011) and Nestos River, Greece (nd-64.00 ug/L) (Golfinopoulos et al, 2003), and much lower than those in the Qiantang River (nd-204.1 ug/L) (Zhou et al, 2006), Gomti River, India (0.20-4578.00 ug/L) (Malik et al, 2007), and Kucuk Menderes River, Turkey (72-120 ug/L) (Turgut, 2003).…”

mentioning

confidence: 65%

Sources, concentrations and risk factors of organochlorine pesticides in soil, water and sediment in the Yellow River estuary

Liu

2015

Marine Pollution Bulletin

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The environmental occurrence, sources and risk factors of organochlorine pesticides (HCHs and DDTs) and their isomers or metabolites were studied using comprehensive surveys (including soil, surface water, groundwater and sediment sampling) conducted in the Yellow River Delta (YRD). HCHs and DDTs were all detected in multi environmental media. Compared with reported organochlorine pesticide values in China and abroad and with related environmental quality standards, the concentrations of HCHs and DDTs were generally at low levels in the YRD. Composition of OCPs (DDT metabolites and HCH isomers) showed that DDTs in the multiple environments of the YRD not only came from residues of dicofol but also from atmospheric deposition, while HCH pollution results from the historical usage of a mixture of technical HCH and lindane. Furthermore, the sum of Excess Lifetime Cancer Risk (∑ELCR) exposure to HCHs exceeded the generally acceptable risk level of 1.0E-06 recommended by the USEPA for carcinogenic chemicals.

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“…in the river delta. Previous surveys conducted in the sampling area between 1999 and 2003 and more recent studies showed that besides HCB, DDT, PCE, and TCE, polycyclic aromatic hydrocarbons, polybrominated diphenyl ethers, and brominated flame retardants could be detected in water, sediments, and biota of this river (12,14,18). Therefore, the lack of significant correlation between HCB pollution and Dehalococcoides composition and relative abundances may suggest that Dehalococcoides spp.…”

Section: Discussionmentioning

confidence: 88%

Tracking Functional Guilds: “Dehalococcoides” spp. in European River Basins Contaminated with Hexachlorobenzene

Taş

Eekert

Schraa

et al. 2009

Appl Environ Microbiol

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Hexachlorobenzene (HCB) has been widely used in chemical manufacturing processes and as a pesticide. Due to its resistance to biological degradation, HCB has mainly accumulated in freshwater bodies and agricultural soils. "Dehalococcoides" spp., anaerobic dechlorinating bacteria that are capable of degrading HCB, were previously isolated from river sediments. Yet there is limited knowledge about the abundance, diversity, and activity of this genus in the environment. This study focused on the molecular analysis of the composition and abundance of active Dehalococcoides spp. in HCB-contaminated European river basins. 16S rRNA-based real-time quantitative PCR and denaturing gradient gel electrophoresis in combination with multivariate statistics were applied. Moreover, a functional gene array was used to determine reductive dehalogenase (rdh) gene diversity. Spatial and temporal fluctuations were observed not only in the abundance of Dehalococcoides spp. but also in the composition of the populations and rdh gene diversity. Multivariate statistics revealed that Dehalococcoides sp. abundance is primarily affected by spatial differences, whereas species composition is under the influence of several environmental parameters, such as seasonal changes, total organic carbon and/or nitrogen content, and HCB contamination. This study provides new insight into the natural occurrence and dynamics of active Dehalococcoides spp. in HCB-contaminated river basins.Halogenated organic compounds are among the most widespread environmental pollutants. Although these compounds were previously believed to be only anthropogenic, a large number of them, including aliphatic, aromatic, and heterocyclic derivatives, are introduced into the environment via biogenic and geogenic sources (9, 21). Hexachlorobenzene (HCB) is believed to be persistent in the environment (22) due to its chemical stability and its resistance to biodegradation. HCB is a hydrophobic and bioaccumulative compound and is listed in the EC Directive (15) as a "priority hazardous substance." At the peak production of HCB in the early 1980s, thousands of tons were produced to be used as fungicides, wood preservatives, and porosity control agents or in the manufacturing of dyes. The use of HCB is no longer allowed in most countries because of its toxicity and carcinogenicity toward fish and mammals. Nevertheless, it is still being released into the environment as a by-product of various chemical processes, as a result of incomplete combustion, or from old landfills (4, 6, 7). HCB contamination has been reported in different environments. Compared to rivers in sparsely populated regions, lakes, and the sea (32, 42), significantly larger amounts of HCB could be found in river water in agricultural areas and in densely populated or highly industrialized areas. HCB concentrations were shown to positively correlate with organic matter content of sediments and soils, and European soils were observed to have the highest HCB concentrations globally (38). Several authors reported o...

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Occurrence of organochlorine insecticides, PCBs and PCB congeners in waters and sediments of the Ebro River (Spain)

Cited by 139 publications

References 22 publications

China's water pollution by persistent organic pollutants

China's water pollution by persistent organic pollutants

Sources, concentrations and risk factors of organochlorine pesticides in soil, water and sediment in the Yellow River estuary

Tracking Functional Guilds: “Dehalococcoides” spp. in European River Basins Contaminated with Hexachlorobenzene

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