Abstract
In the past decades, the environmental presence and ecological risks of chlorinated paraffins (CPs), an emerging class of organic halogen compounds, have been receiving increasing attention worldwide. Short-chain CPs (SCCPs) and medium-chain CPs (MCCPs) constitute the important CPs of considerable concern. In this review article, the state-of-the-art research status on the environmental transformation of CPs, including thermal decomposition, photolytic and photocatalytic degradation, biological metabolism, and atmospheric transformation, was summarized and integrated in detail. The degradation efficiency and transformation products of CPs in these environmental processes were evaluated, in which dechlorination was considered as the major reaction pathway. Notably, waste incineration of CPs has been demonstrated to generate a variety of persistent chlorinated aromatic hydrocarbons such as polychlorinated biphenyls and polychlorinated naphthalenes, which have more significant environmental impacts. Additionally, photodegradation and photocatalysis are suggested as the feasible techniques for efficient removal of SCCPs from water matrices. Overall, the current transformation studies of CPs could facilitate the comprehensive understanding of their environmental behaviors and fate as well as the development of promising remediation strategies for pollution control.
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Acknowledgements
This work was supported by the Sponge City Special Research of Wanzhou District (No. SW-2017-064) and the National Natural Science Foundation of China (No. 51709024).
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In this review article, SY is responsible for the writing, reviewing, and editing. MW is responsible for the supervision, conceptualization, methodology, reviewing, and editing. BL and JW are responsible for the reviewing and editing. All authors have read and approved the final manuscript.
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Yuan, S., Wang, M., Lv, B. et al. Transformation pathways of chlorinated paraffins relevant for remediation: a mini-review. Environ Sci Pollut Res 28, 9020–9028 (2021). https://doi.org/10.1007/s11356-021-12469-w
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DOI: https://doi.org/10.1007/s11356-021-12469-w