Remediation of hexachlorocyclohexanes by electrochemically activated persulfates
Jazyk angličtina Země Německo Médium print-electronic
Typ dokumentu časopisecké články, práce podpořená grantem
PubMed
26336848
DOI
10.1007/s11356-015-5312-y
PII: 10.1007/s11356-015-5312-y
Knihovny.cz E-zdroje
- Klíčová slova
- Chemical oxidation, Chlorobenzenes, HCH, Hexachlorocyclohexanes, Lindane, Peroxydisulfate, Peroxymonosulfate,
- MeSH
- chlorfenoly chemie MeSH
- elektrochemie MeSH
- hexachlorcyklohexan chemie MeSH
- insekticidy chemie MeSH
- látky znečišťující půdu chemie MeSH
- oxidancia chemie MeSH
- peroxidy chemie MeSH
- podzemní voda MeSH
- regenerace a remediace životního prostředí * MeSH
- sírany chemie MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- Geografické názvy
- Česká republika MeSH
- Názvy látek
- 2,4,6-trichlorophenol MeSH Prohlížeč
- chlorfenoly MeSH
- hexachlorcyklohexan MeSH
- insekticidy MeSH
- látky znečišťující půdu MeSH
- oxidancia MeSH
- peroxidy MeSH
- peroxymonosulfate MeSH Prohlížeč
- sírany MeSH
Hexachlorocyclohexane (HCH) isomers represent a family of formerly widely utilized pesticides that are persistent, capable of undergoing long-range transport and tend to bioaccumulate in human and animal tissue. Their widespread global utilization coupled with a propensity to adversely impact human health and the environment translates into an urgent need to develop feasible methodologies by which to treat HCH-impacted groundwater and soil. The present study was conducted to evaluate the efficacy of two persulfate-based oxidants: peroxydisulfate (S2O8 (2-), PDS) and peroxymonosulfate (HSO5 (-), PMS) activated by electrochemical processes (EC) to treat HCH-impacted environmental media. This research demonstrated that the optimal experimental conditions (oxidant dose and electrical current) were 2 mM PDS and 20 mA for an aqueous solution of 4 μM of summed HCHs (ΣHCH). GC/MS full scan analysis revealed the presence of 2,4,6-trichlorophenol as the only detectable intermediate formed during electro-activated PDS treatment of ΣHCH. The investigated method was tested on leachate from a known HCHs-impacted site in Hajek, Czech Republic which contained 106 μg/l of ΣHCH and 129 μg/l of chlorobenzenes. Results from batch treatment showed positive results for electro-activated PDS but only negligible effectiveness for electro-activated PMS. In addition to explaining the efficacy of the electro-activated PDS, this research also explored the basis for the differing reactivities of these two persulfates.
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