Physiochemical technologies for HCB remediation and disposal: A review

Tong, Man; Yuan, Songhu

doi:10.1016/j.jhazmat.2012.05.092

Cited by 44 publications

(14 citation statements)

References 124 publications

(172 reference statements)

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“…But as it was soon discovered, these procedures were in fact a source for a de novo polychlorinated compound synthesis, the process by which dioxins are re-formed being investigated in the recent years [17][18][19]. Therefore, greater attention was focused on more chemical-based processes [6,10,[20][21][22][23], along with microbial ones [24].…”

Section: Introductionmentioning

confidence: 99%

Mechanistic Considerations on the Hydrodechlorination Process of Polychloroarenes

Mitoma¹,

Katayama²,

Simion³

2018

Organochlorine

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Defunctionalization of organochlorines through reductive dechlorination (also known as hydrodechlorination-replacement of chlorine atoms by hydrogen-is one of the main methodologies used in the detoxification of these harmful compounds. Most of the published papers on this particular matter focused on specific reagents, reaction conditions, and mainly result efficiency. Some of the authors were also concerned with reaction pathways (e.g., the order in which chlorine atoms were removed from a polychlorinated aromatic substrate-polychlorinated biphenyls, PCBs; polychlorinated dibenzo-p-dioxins, PCDDs; or polychlorinated dibenzofurans, PCDFs). However, the papers that dealt with the investigation of reaction mechanism were rather scarce. This chapter presents the advances made by researchers in understanding, from a mechanistic point of view, the hydrodechlorination process, along with our own assumptions. In doing so, it would be easier to predict the behavior of such compounds in a specific environment, showing more clearly the scope and limitations of each process, depending on the reaction conditions and reagents.

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Section: Introductionmentioning

confidence: 99%

Mechanistic Considerations on the Hydrodechlorination Process of Polychloroarenes

Mitoma¹,

Katayama²,

Simion³

2018

Organochlorine

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“…The first step of POP remediation is to promote desorption [107]. Physical methods need to remove the pollutants from soils or water in order to destroy the molecules completely by burning [107]. This has a high cost as the incinerator plant needs filter systems to eliminate other pollutants such as dioxins.…”

Section: How To Control Hazardous Effects Of Persistent Moleculesmentioning

confidence: 99%

Persistence and Bioaccumulation of Persistent Organic Pollutants (POPs)

Langenbach¹

2013

Applied Bioremediation - Active and Passive Approaches

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“…In this study, the potential of coupled APG desorption and subsequent ZEA treatment to remediate hexachlorobenzene (HCB)‐contaminated soil, which was selected as representative HOC‐contaminated soil, was investigated. Hexachlorobenzene is an organochlorine pesticide widely distributed in the environment due to its extensive use in the past (Hu, Huang, & Yu, 2019; Tong & Yuan, 2012). Although HCB has not been produced as a fungicide since the mid‐1970s to early 1980s, considerable quantities of HCB are produced as a waste by‐product during synthesis of some chloroorganic solvents and pesticides, such as carbon tetrachloride and tetrachloroethylene (Grgić et al., 2019).…”

Section: Introductionmentioning

confidence: 99%

Remediation of hexachlorobenzene‐contaminated soils with alkyl glycoside‐enhanced desorption and zero‐valent iron–EDTA–air treatment

et al. 2020

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In this work, the use of a coupled process, alkyl glycoside (APG) enhanced soil desorption followed by the zero‐valent iron–ethylenediaminetetraacetic acid (EDTA)–air (ZEA) Fenton‐like system, was investigated for the remediation of a simulated hexachlorobenzene (HCB)‐contaminated diatomite soil and a real HCB‐contaminated soil. Three surfactants with different concentrations were studied to obtain the suitable soil desorption agent. Compared with APG0810 and Triton x‐100, APG0814 showed a better solubilization effect due to its lower critical micelle concentration. With addition of 3000 mg L−1 APG0814, 35% of HCB was removed from contaminated diatomite soil, and a small amount of residual APG in diatomite soil was found to be beneficial for the soil dispersion. After treatment with the ZEA system, the removal efficiency of HCB in the diatomite soil desorption solution reached 76% in 2 h; we observed that a small amount of APG retained in the desorption solution accelerated the HCB removal. A real HCB‐contaminated soil was used to verify the remediation effects. This study demonstrates that our approach is a feasible alternative for remediating soil contaminated with hydrophobic organic compounds.

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Physiochemical technologies for HCB remediation and disposal: A review

Cited by 44 publications

References 124 publications

Mechanistic Considerations on the Hydrodechlorination Process of Polychloroarenes

Mechanistic Considerations on the Hydrodechlorination Process of Polychloroarenes

Persistence and Bioaccumulation of Persistent Organic Pollutants (POPs)

Remediation of hexachlorobenzene‐contaminated soils with alkyl glycoside‐enhanced desorption and zero‐valent iron–EDTA–air treatment

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