Monitoring bioaccumulation and toxic effects of hexachlorobenzene using the polyurethane foam unit method in the microbial communities of the Fuhe River, Wuhan

Liu, Ting; Chen, Zhulei; Shen, Yin; Gan, Lu; Cao, Li; Lv, Zi-zhong

doi:10.1016/s1001-0742(07)60123-5

Cited by 9 publications

(2 citation statements)

References 24 publications

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“…Potential sources for HCBs were from production and use of pentachlorophenol and its sodium salt, pentachloronitrobenzene, and chlorothalonil (Hung et al 2010), firework (Liu et al 2007;Reed et al 2007;Zhang et al 2009), and from combustion and incineration processes (Barber et al 2005;Kunisue et al 2004;Zheng et al 2010). trans-Chlordane, cis-chlordane, oxychlordane, heptachlor, and heptachlor epoxide, used for termite control, were detected in breast milk samples from some provinces (Zhou et al 2011).…”

Section: Resultsmentioning

confidence: 99%

Organochlorine pesticides and their metabolites in human breast milk from Shanghai, China

Wang

et al. 2015

Environ Sci Pollut Res

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Organochlorine pesticides (OCPs) are persistent organic pollutants that could cause deleterious effects on human health. Breast milk represents a noninvasive specimen source to assess maternal and infant exposure to OCPs. This study recruited 142 pregnant mothers in 2011-2012 in Shanghai, China, and their breast milk samples were collected during lactation and analyzed for 27 OCP compounds. Detection rates were in a range of 65.5 to 100 %. In particular, metabolites of 2,2-bis(chlorophenyl)-1,1,1-trichloroethane (DDT) such as 2-chloro-1,1-bis(4-chlorophenyl)ethylene (DDMU), 2,2-bis(4-chlorophenyl)ethanol (DDOH), bis(4-chlorophenyl)ketone (DBP), and 4,4'-dichlorodiphenylmethane (DDM) were detected in most milk samples. DDTs, hexachlorobenzene (HCB), and hexachlorocyclohexane (HCH) were dominant OCPs with mean levels of 316, 49.8, and 41.5 ng/g lipid content, respectively, whereas levels of methoxychlor, ∑Drins, ∑Heptachlor, ∑Chlordane, and ∑Endosulfan were fairly low (0.87-5.6 ng/g lipid content). Milk concentrations of OCPs were weakly correlated with maternal age, body weight, and body mass indexes (BMIs). ∑OCPs in this study were much lower than those in human breast milk samples collected in 2002 and 2007. Consumption of higher amounts of fish was associated with higher milk levels of OCPs. Specific OCP patterns in breast milk samples from migrant mothers in Shanghai reflected features of OCP production, use, and exposure in their home provinces. The probabilistic exposure assessment model reveals that Shanghai infants were exposed to low levels of OCPs through breast milk consumption. However, infants as the vulnerable group might be subject to the potential additive and/or synergistic health effects from complex OCP exposure.

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Section: Resultsmentioning

confidence: 99%

Organochlorine pesticides and their metabolites in human breast milk from Shanghai, China

Wang

et al. 2015

Environ Sci Pollut Res

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“…A PFU can be a substrate for instantaneous inhabitance and provides us with an evaluation of a system's ability to support the recolonization functionality among representative organisms (Stewart et al, 1985). Several studies have found PFU sampling gear adequate in evaluating protist biota in various aquatic systems, including rivers and streams (Chung et al, 1999;Xu et al, 2002;Liu et al, 2007;Jiang & Shen, 2007).…”

Section: Discussionmentioning

confidence: 99%

Collection strategies for quantifying protist assemblages in temperate headwater streams

2009

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The determinination of an adequate collection protocol for protists is critical in the examination of their distribution and composition in temperate headwater streams. The objective of this study was to test which sampling design/sample gear combination would yield a cost-effective, site-representative protist assemblage. Defining parameters included greatest taxa richness, abundance, morphological diversity, taxa overlap, and cell-size diversity. Two sample designs (i.e., transect and mesohabitat design) and two sample gears (i.e., benthic grab sample, and a colonizing device [polyurethane foam unit, PFU]) were tested in three 100-m reaches representing the predominant environmental conditions (i.e., fragmented woodlots and agriculture) in the study area. A two-way ANOVA was used to evaluate abundance taxa richness and abundance of the protist assemblage (fixed effects) across the three reaches (random effects). The mesohabitat sampling design had the highest mean in both taxa richness (n = 72, P = 0.0012) and abundance (n = 72, P = 0.0004). The highest mean was reported with the benthic grab sampler (39.89 ± 1.1) in the abundance count only (n = 72, P \ 0.0001). There was no difference in the design and gear interaction. Morphological diversity, cell-size diversity and percent taxa overlap between sampling design/sample gear combinations also were examined. A higher taxa overlap of the top 10% most abundant taxa was observed with the benthic grab sampler (43-100%) versus the PFU (25-69%); however, the greatest morphological and cell-size diversity was produced by the transect design/PFU combination. We conclude a ''hybrid'' of the two sample designs will account for ''patchy'' distributional patterns of protists and use of the PFU, because of the highest yield in morphological and cell-size diversity, will provide the most costeffective, site-representative protist assemblage in temperate headwater streams.

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Role of Protists in Microbial Interactions with Hydrocarbons

Timm¹,

Stoeck²,

Edgcomb³

2010

Handbook of Hydrocarbon and Lipid Microbiology

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Monitoring bioaccumulation and toxic effects of hexachlorobenzene using the polyurethane foam unit method in the microbial communities of the Fuhe River, Wuhan

Cited by 9 publications

References 24 publications

Organochlorine pesticides and their metabolites in human breast milk from Shanghai, China

Organochlorine pesticides and their metabolites in human breast milk from Shanghai, China

Collection strategies for quantifying protist assemblages in temperate headwater streams

Role of Protists in Microbial Interactions with Hydrocarbons

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