naa a22 4500 510750192 CHVBK 20180411083101.0 cr unu---uuuuu 180411e20131201xx s 000 0 eng 10.1007/s11270-013-1718-7 doi (NATIONALLICENCE)springer-10.1007/s11270-013-1718-7 A Comparative Study of Trichloroethylene (TCE) Degradation in Contaminated Groundwater (GW) and TCE-Spiked Deionised Water Using Zero Valent Iron (ZVI) Under Various Mass Transport Conditions [Elektronische Daten] [Kandasamy Thangavadivel, Wei Wang, Volker Birke, Ravi Naidu] The work reported here demonstrates that zero valent iron (ZVI), a material used in permeable reactive barriers, yields degradation rate constants for trichloroethylene (TCE) that are considerably different depending on whether they are determined in deionised water or in groundwater. Batch studies using ZVI and TCE-spiked deionised (DI) water and TCE-contaminated groundwater revealed that within 50h, 80% of the TCE present in groundwater was mineralised, compared to TCE-spiked deionised water in which only 50% of TCE was demineralised by ZVI in 50h. In both TCE-spiked groundwater and DI water, cis-dichloroethylene was the major by-product, and it was reduced together with TCE after 96h of treatment. Along with changes in concentrations of TCE and its metabolites, increased levels of chloride confirmed TCE degradation. TCE-spiked groundwater gave a higher rate constant (k) under similar conditions. The elevated chloride (830mg/l) concentrations of the groundwater could be a possible reason for this higher rate constant, in spite of the fact that groundwater also contains higher inorganic carbon (132mg/l) and calcium (26mg/l) and has a pH of 7.9. The rate constant (0.017-0.03223h−1) and half-life of TCE (21.5 to 40h) are within the reported ranges in the literature. The implications of the results for the performance of ZVI in permeable reactive barriers are that not only groundwater chemistry, but also groundwater flow conditions, plays a key role in TCE degradation. Springer Science+Business Media Dordrecht, 2013 TCE nationallicence Zero valent iron nationallicence Groundwater nationallicence Permeable reactive barrier nationallicence Batch experiment nationallicence Mass transport nationallicence Thangavadivel Kandasamy Centre for Environmental Risk Assessment and Remediation (CERAR), University of South Australia, Mawson Lakes Campus, Mawson Lakes, 5095, Adelaide, South Australia, Australia aut Wang Wei Centre for Environmental Risk Assessment and Remediation (CERAR), University of South Australia, Mawson Lakes Campus, Mawson Lakes, 5095, Adelaide, South Australia, Australia aut Birke Volker Faculty of Civil and Environmental Engineering, Ostafalia University of Applied Science, Suderburg Campus, Herbert-Meyer-Str.7, Suderburg, Germany aut Naidu Ravi Centre for Environmental Risk Assessment and Remediation (CERAR), University of South Australia, Mawson Lakes Campus, Mawson Lakes, 5095, Adelaide, South Australia, Australia aut Water, Air, & Soil Pollution Springer Netherlands 224/12(2013-12-01), 1-9 0049-6979 224:12<1 2013 224 11270 https://doi.org/10.1007/s11270-013-1718-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11270-013-1718-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Thangavadivel Kandasamy Centre for Environmental Risk Assessment and Remediation (CERAR), University of South Australia, Mawson Lakes Campus, Mawson Lakes, 5095, Adelaide, South Australia, Australia aut NATIONALLICENCE 700 1- Wang Wei Centre for Environmental Risk Assessment and Remediation (CERAR), University of South Australia, Mawson Lakes Campus, Mawson Lakes, 5095, Adelaide, South Australia, Australia aut NATIONALLICENCE 700 1- Birke Volker Faculty of Civil and Environmental Engineering, Ostafalia University of Applied Science, Suderburg Campus, Herbert-Meyer-Str.7, Suderburg, Germany aut NATIONALLICENCE 700 1- Naidu Ravi Centre for Environmental Risk Assessment and Remediation (CERAR), University of South Australia, Mawson Lakes Campus, Mawson Lakes, 5095, Adelaide, South Australia, Australia aut NATIONALLICENCE 773 0- Water, Air, & Soil Pollution Springer Netherlands 224/12(2013-12-01), 1-9 0049-6979 224:12<1 2013 224 11270 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer