Reductive dechlorination of non-ortho substituted polychlorinated biphenyls by ultraviolet irradiation in alkaline 2-propanol

Yao, Yuan; Kakimoto, Kohji; Ogawa, Hiroaki; Kato, Yasuhiko; Hanada, Yoshifumi; Shinohara, Ryota; Yoshino, Eiichi

doi:10.1016/s0045-6535(97)00282-8

Cited by 18 publications

(5 citation statements)

References 15 publications

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“…The isopropyl radical has been reported to dechlorinate PCBs and pesticides [216][217][218]. Photolytic production of a strong one-electron oxidation, Ox $ , will abstract an H-atom from 2-propanol to yield the isopropyl radical (Eq.…”

Section: Alkaline 2-propanol Photolytic Reductionmentioning

confidence: 99%

Treatment technologies for aqueous perfluorooctanesulfonate (PFOS) and perfluorooctanoate (PFOA)

Vecitis

Park

Cheng

et al. 2009

Front. Environ. Sci. Eng. China

373

256

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Fluorochemicals (FCs) are oxidatively recalcitrant, environmentally persistent, and resistant to most conventional treatment technologies. FCs have unique physiochemical properties derived from fluorine which is the most electronegative element. Perfluorooctanesulfonate (PFOS), and perfluorooctanoate (PFOA) have been detected globally in the hydrosphere, atmosphere and biosphere. Reducing treatment technologies such as reverses osmosis, nano-filtration and activated carbon can remove FCs from water. However, incineration of the concentrated waste is required for complete FC destruction. Recently, a number of alternative technologies for FC decomposition have been reported. The FC degradation technologies span a wide range of chemical processes including direct photolysis, photocatalytic oxidation, photochemical oxidation, photochemical reduction, thermally-induced reduction, and sonochemical pyrolysis. This paper reviews these FC degradation technologies in terms of kinetics, mechanism, energetic cost, and applicability. The optimal PFOS/PFOA treatment method is strongly dependent upon the FC concentration, background organic and metal concentration, and available degradation time.

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Section: Alkaline 2-propanol Photolytic Reductionmentioning

confidence: 99%

Treatment technologies for aqueous perfluorooctanesulfonate (PFOS) and perfluorooctanoate (PFOA)

Vecitis

Park

Cheng

et al. 2009

Front. Environ. Sci. Eng. China

373

256

View full text Add to dashboard Cite

show abstract

“…For example, photochemistry of PCBs was investigated in cyclohexane, 14 in n-hexane, 15,16 or in alkaline 2-propanol. [17][18][19][20] Dechlorination appears to be the major photochemical reaction of PCBs. Reportedly, highly chlorinated PCB congeners particularly those with substitutions at the ortho positions are most vulnerable to photochemical attack.…”

Section: Introductionmentioning

confidence: 99%

PLS and N-PLS based MIA-QSPR modeling of the photodegradation half-lives for polychlorinated biphenyl congeners

2020

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“…Photochemical behaviors of PCBs in organic solutions have been reported by many researchers. For example, photochemistry of PCBs was investigated in cyclohexane [15], in n-hexane [12,16,17] or in alkaline 2-propanol [18][19][20][21]. Dechlorination appears to be the major photochemical reaction of PCBs.…”

Section: Introductionmentioning

confidence: 99%

QSPRs for the prediction of photodegradation half-life of PCBs inn-hexane

Niu

Zhang

Shen

et al. 2006

SAR and QSAR in Environmental Research

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By partial least squares (PLS) regression analysis, a quantitative structure-property relationship (QSPR) model was developed for photodegradation half-life (t1/2) of polychlorinated biphenyls (PCBs) in n-hexane solution under UV irradiation. Quantum chemical descriptors computed by PM3 Hamiltonian were used as predictor variables. The cross-validated value for the optimal QSPR model was 0.589, indicating good predictive capability for log t1/2 values of PCBs in n-hexane. The QSPR results show that standard heat of formation (DeltaHf), total energy (TE), and molecular weight (Mw) have dominant effect on t1/2 values of PCBs in n-hexane. Increasing DeltaHf and TE values or decreasing Mw values of the PCBs leads to decrease of log t1/2 values. In addition, increasing the largest negative atomic charge on a carbon atom and dipole moment of the PCBs leads to decrease of log t1/2 values.

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Reductive dechlorination of non-ortho substituted polychlorinated biphenyls by ultraviolet irradiation in alkaline 2-propanol

Cited by 18 publications

References 15 publications

Treatment technologies for aqueous perfluorooctanesulfonate (PFOS) and perfluorooctanoate (PFOA)

Treatment technologies for aqueous perfluorooctanesulfonate (PFOS) and perfluorooctanoate (PFOA)

PLS and N-PLS based MIA-QSPR modeling of the photodegradation half-lives for polychlorinated biphenyl congeners

QSPRs for the prediction of photodegradation half-life of PCBs inn-hexane

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