Degradation of Hexachlorocyclohexanes (HCHs) by Stable Zero Valent Iron (ZVI) Microparticles
During the production of lindane (γ-HCH) large volumes of wastes containing α-, β-, and δ-HCH isomers were generated. Hexachlorocyclohexanes (HCHs) are carcinogens and teratogen compounds. Although their production and use are currently banned in most countries, many landfills and sites remain pollu...
| Authors: | ; ; ; ; |
|---|---|
| Format: | Article |
| Publication date: | 2016 |
| Country: | España |
| Institution: | Universidad Complutense de Madrid (UCM) |
| Repository: | Docta Complutense |
| Language: | English |
| OAI Identifier: | oai:docta.ucm.es:20.500.14352/98934 |
| Online Access: | https://hdl.handle.net/20.500.14352/98934 |
| Access Level: | Open access |
| Keyword: | 66.0 Zero valent iron microparticles HCH Lindane Wastewater Pollutant reduction Dechlorination Ingeniería química 23 Química |
| _version_ | 1878740830520344576 |
|---|---|
| author | Domínguez Torre, Carmen María |
| author2 | Rodríguez Vega, Sergio Lorenzo Fernández, David Romero Salvador, Arturo Santos López, Aurora |
| author2_role | author author author author |
| author_browse | Domínguez Torre, Carmen María Lorenzo Fernández, David Rodríguez Vega, Sergio Romero Salvador, Arturo Santos López, Aurora |
| author_facet | Domínguez Torre, Carmen María Rodríguez Vega, Sergio Lorenzo Fernández, David Romero Salvador, Arturo Santos López, Aurora |
| author_role | author |
| collection | Docta Complutense |
| description | During the production of lindane (γ-HCH) large volumes of wastes containing α-, β-, and δ-HCH isomers were generated. Hexachlorocyclohexanes (HCHs) are carcinogens and teratogen compounds. Although their production and use are currently banned in most countries, many landfills and sites remain polluted by these compounds. This paper studies a promising and novel alternative for the HCH abatement: dechlorination by zero valent iron microparticles. Synthetic wastewater (0.5 mg/L of α-, β-, γ-, and δ-HCH or 6 mg/L of γ-HCH) and five types of commercial iron microparticles (here named mFe-1, mFe-2, mFe-3, mFe-4, and mFe-5) were used in batch (5 g/L) and continuous (W mFe/Q L = 167 g · h/L) operation mode at room temperature. Iron microparticles were characterized (before and after reaction) by N2 adsorption/desorption isotherms and X-ray diffraction. HCH isomers showed different behavior vs. dechlorination (γ > α > δ > β) according to the axial/equatorial position of the chlorines. The most active iron source among those tested was mFe-1, presenting small particle diameter (70 μm), moderate BET area (35 m2/kg), low oxygen content, and traces of manganese. mFe-1 exhibited high activity and stability both in continuous (X γ-HCH = 70%, W mFe/Q L = 167 g · h/L) and discontinuous (X γ-HCH = 100%, 48 h) operation. Contribution of HCH adsorption over iron microparticles was found negligible being benzene and Cl− the final dechlorination products. |
| eu_rights_str_mv | openAccess |
| format | article |
| id | ES_da27dc7bbf1f3307e2a6e4cd95f29c8a |
| institution | Universidad Complutense de Madrid (UCM) |
| instname_str | Universidad Complutense de Madrid (UCM) |
| language | eng |
| network_acronym_str | ES |
| network_name_str | España |
| oai_identifier_str | oai:docta.ucm.es:20.500.14352/98934 |
| publishDate | 2016 |
| publishDateSort | 2016 |
| publisher | Springer |
| publisherStr | Springer |
| reponame_str | Docta Complutense |
| spelling | Degradation of Hexachlorocyclohexanes (HCHs) by Stable Zero Valent Iron (ZVI) Microparticles Domínguez Torre, Carmen María Rodríguez Vega, Sergio Lorenzo Fernández, David Romero Salvador, Arturo Santos López, Aurora 66.0 Zero valent iron microparticles HCH Lindane Wastewater Pollutant reduction Dechlorination Ingeniería química 23 Química During the production of lindane (γ-HCH) large volumes of wastes containing α-, β-, and δ-HCH isomers were generated. Hexachlorocyclohexanes (HCHs) are carcinogens and teratogen compounds. Although their production and use are currently banned in most countries, many landfills and sites remain polluted by these compounds. This paper studies a promising and novel alternative for the HCH abatement: dechlorination by zero valent iron microparticles. Synthetic wastewater (0.5 mg/L of α-, β-, γ-, and δ-HCH or 6 mg/L of γ-HCH) and five types of commercial iron microparticles (here named mFe-1, mFe-2, mFe-3, mFe-4, and mFe-5) were used in batch (5 g/L) and continuous (W mFe/Q L = 167 g · h/L) operation mode at room temperature. Iron microparticles were characterized (before and after reaction) by N2 adsorption/desorption isotherms and X-ray diffraction. HCH isomers showed different behavior vs. dechlorination (γ > α > δ > β) according to the axial/equatorial position of the chlorines. The most active iron source among those tested was mFe-1, presenting small particle diameter (70 μm), moderate BET area (35 m2/kg), low oxygen content, and traces of manganese. mFe-1 exhibited high activity and stability both in continuous (X γ-HCH = 70%, W mFe/Q L = 167 g · h/L) and discontinuous (X γ-HCH = 100%, 48 h) operation. Contribution of HCH adsorption over iron microparticles was found negligible being benzene and Cl− the final dechlorination products. Springer https://hdl.handle.net/20.500.14352/98934 |
| spellingShingle | Degradation of Hexachlorocyclohexanes (HCHs) by Stable Zero Valent Iron (ZVI) Microparticles Domínguez Torre, Carmen María 66.0 Zero valent iron microparticles HCH Lindane Wastewater Pollutant reduction Dechlorination Ingeniería química 23 Química |
| title | Degradation of Hexachlorocyclohexanes (HCHs) by Stable Zero Valent Iron (ZVI) Microparticles |
| title_full | Degradation of Hexachlorocyclohexanes (HCHs) by Stable Zero Valent Iron (ZVI) Microparticles |
| title_fullStr | Degradation of Hexachlorocyclohexanes (HCHs) by Stable Zero Valent Iron (ZVI) Microparticles |
| title_full_unstemmed | Degradation of Hexachlorocyclohexanes (HCHs) by Stable Zero Valent Iron (ZVI) Microparticles |
| title_short | Degradation of Hexachlorocyclohexanes (HCHs) by Stable Zero Valent Iron (ZVI) Microparticles |
| title_sort | Degradation of Hexachlorocyclohexanes (HCHs) by Stable Zero Valent Iron (ZVI) Microparticles |
| topic | 66.0 Zero valent iron microparticles HCH Lindane Wastewater Pollutant reduction Dechlorination Ingeniería química 23 Química |
| topic_facet | 66.0 Zero valent iron microparticles HCH Lindane Wastewater Pollutant reduction Dechlorination Ingeniería química 23 Química |
| url | https://hdl.handle.net/20.500.14352/98934 |