Occurrence, sources, partitioning and ecological risk of short- and medium-chain chlorinated paraffins in river water and sediments in Shanghai

Wang, Xuetong; Jia, Haohao; Hu, Bao-Ping; Cheng, Hangxin; Zhou, Ying; Fu, Rui

doi:10.1016/j.scitotenv.2018.10.391

Cited by 53 publications

(16 citation statements)

References 39 publications

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“…The obtained highest SCCP concentration of 470 ng L −1 was much higher than those obtained from the influent waters of the municipal sewage treatment plants in Beijing and Japan (Wei et al 2016;Zeng et al 2013b). Wang et al (2019a) reported ∑SCCP concentration ranging from 15.0 to 1640 ng L −1 in river water samples. The results obtained were comparable to those obtained from other studies in China (Chang et al 2016) but were also higher than in other studies (Zeng et al 2011b;Sun et al 2017;Houde et al 2008;Coelhan 2010;Gandolfi et al 2015).…”

Section: River Watermentioning

confidence: 71%

“…In the aquatic environment, SCCPs are more likely to be adsorbed in sediment since they have low water solubility and high carbon partition coefficients (Environment Canada 2008). There are quite a number of studies that have been reported globally (Wang et al 2019a;Pan et al 2018;Pan et al 2020;Huang et al 2019a;Wang et al 2020a;Labadie et al 2019).…”

Section: Aquatic Environmentmentioning

confidence: 99%

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Status of short-chain chlorinated paraffins in matrices and research gap priorities in Africa: a review

Nevondo

Okonkwo

2021

Environ Sci Pollut Res

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Chlorinated paraffins (CPs) have been applied as additives in a wide range of consumer products, including polyvinyl chloride (PVC) products, mining conveyor belts, paints, sealants, adhesives and as flame retardants. Consequently, CPs have been found in many matrices. Of all the CP groups, short-chain chlorinated paraffins (SCCPs) have raised an alarming concern globally due to their toxicity, persistence and long-range transportation in the environment. As a result, SCCPs were listed in the Stockholm Convention on Persistent Organic Pollutants (POPs) in May 2017. Additionally, a limit for the presence of SCCPs in other CP mixtures was set at 1% by weight. CPs can be released into the environment throughout their life cycle; therefore, it becomes crucial to assess their effects in different matrices. Although about 199 studies on SCCP concentration in different matrices have been published in other continents; however, there are scarce/or limited studies on SCCP concentration in Africa, particularly on consumer products, landfill leachates and sediment samples. So far, published studies on SCCP concentration in the continent include SCCPs in egg samples, e-waste recycling area and indoor dust in Ghana and South Africa, despite absence of any production of SCCPs in Africa. However, there still remains a huge research gap in the continent of Africa on SCCPs. Consequently, there is a need to develop robust SCCP inventories in Africa since the Stockholm Convention has already developed guidance document in this respect. This review, therefore, examines the state of knowledge pertaining to the levels and trends of these contaminants in Africa and further provides research gaps that need to be considered in order to better understand the global scale of the contaminant.

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Section: River Watermentioning

confidence: 71%

Section: Aquatic Environmentmentioning

confidence: 99%

Status of short-chain chlorinated paraffins in matrices and research gap priorities in Africa: a review

Nevondo

Okonkwo

2021

Environ Sci Pollut Res

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“…Consequently, SCCPs were added to Annex A of the Stockholm Convention in 2017 (Conference of the Parties to the Stockholm Convention 2017). Given the structural similarity of SCCPs with MCCPs and LCCPs-which are only differing by chain lengths-similar detrimental environmental properties could be shown by the presence of (mainly) MCCPs in a wide range of samples (He et al 2019;Wu et al 2019;Hilger et al 2013;Wang et al 2019;Li et al 2017). Arguably, this similarity in structure and environmental properties could also be valid in the case of toxicity.…”

Section: Introductionmentioning

confidence: 94%

In vitro human cell-based TTR-TRβ CALUX assay indicates thyroid hormone transport disruption of short-chain, medium-chain, and long-chain chlorinated paraffins

et al. 2021

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Over the last decades, short-chain chlorinated paraffins (SCCPs), medium-chain chlorinated paraffins (MCCPs), and long-chain chlorinated paraffins (LCCPs) have become the most heavily produced monomeric organohalogen compound class of environmental concern. However, knowledge about their toxicology is still scarce, although SCCPs were shown to have effects on the thyroid hormone system. The lack of data in the case of MCCPs and LCCPs and the structural similarity with perfluoroalkyl substances (PFAS) prompted us to test CPs in the novel TTR-TR CALUX assay for their thyroid hormone transport disrupting potential. Four self-synthesized and additionally purified single chain length CP mixtures (C10-CPs, C11-CPs, C14-CPs and C16-CPs) and two each of industrial MCCP and LCCP products were tested in parallel with PFOA. All CP mixtures influenced the TTR binding of T4, giving activities of 1,300 to 17,000 µg/g PFOA equivalents and lowest observable effect concentrations (LOELs) of 0.95 to 0.029 mM/L incubate. Highest activities and lowest LOELs were observed for C16-CPs (48.3% Cl content, activity 17,000, LOEL 0.047 mM/L) and a LCCP mixture (71.7% Cl content; activity 10,000; LOEL 0.029 mM/L). A trend of higher activities and lower LOELs towards longer chains and higher chlorination degrees was implied, but could not be statistically confirmed. Irrespectively, the less well examined and current-use LCCPs showed the highest response in the TTR-TRβ CALUX assay.

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“…Although initially Cs activity concentration was higher after the accident, the concentration was decreased with time due to dilution by noncontaminated water or influence of the above mentioned factors; as re-equilibrium may not be achieved yet because of external discharge of Cs. Wang, Jia, et al (2019) portrayed the origins, sorption characteristics, and ecological risk of contamination by shortchain chlorinated paraffins (SCCPs) and medium-chain chlorinated paraffins (MCCPs) in surface water column and sediments in Shanghai by investigating 78 samples where total SCCP and MCCP concentrations in water were varied from 15.0 to 1,640 ng/L and 40.3 to 3,870 ng/L, respectively; and in sediment, the concentrations were ranged from not detected (ND) to 2,020 ng/g and 10.1 to 10,800 ng/g, respectively. Although log K oc values were significantly correlated with CP carbon chain length rather than chlorine number in CP, TOC and DOC concentrations were not the main factors to initiate sorption or desorption of CPs on sediment.…”

Section: Annual Literature Reviewmentioning

confidence: 99%

Contaminated aquatic sediments

Hossain

2020

Water Environment Research

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Aquatic sediments are contaminated by different anthropogenic activities and natural deposition. This review manuscript has discussed on published manuscript in 2019 based on monitoring and identification of contaminants, GIS application and isotopic evaluation for monitoring of pollutants, physicochemical and biochemical fate and transport of the pollutants as well as remediation and toxicity analysis so that environmental and ecological impacts due to pollution can be minimized.

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Occurrence, sources, partitioning and ecological risk of short- and medium-chain chlorinated paraffins in river water and sediments in Shanghai

Cited by 53 publications

References 39 publications

Status of short-chain chlorinated paraffins in matrices and research gap priorities in Africa: a review

Status of short-chain chlorinated paraffins in matrices and research gap priorities in Africa: a review

In vitro human cell-based TTR-TRβ CALUX assay indicates thyroid hormone transport disruption of short-chain, medium-chain, and long-chain chlorinated paraffins

Contaminated aquatic sediments

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