REMEDIATION OF HEXACHLORO-1,3-BUTADIENE CONTAMINATED GROUNDWATER Gertrud ANZENGRUBER 1 , Christof LANZERSTORFER 1 ABSTRACT. Hexachloro-1,3-butadiene (HCBD) is an industrial by-product that is produced during the manufacturing of various chlorinated hydrocarbons like vinyl chloride, trichloroethene or tetrachloroethene. HCBD is toxic and considered harmful for the environment and especially for aquatic ecosystems. Various processes have been investigated for the abatement of chlorinated hydrocarbons in aqueous solutions. In this study, the physical and chemical remediation of HCBD contaminated groundwater was investigated. On the basis of the results, the costs for the treatment of a contaminated water flow of 200 m³/h were compared. The results show that in the investigated application, a dechlorination reactor would be less expensive than an adsorber. Keywords: Hexachloro-1,3-butadiene, groundwater, dechlorination, adsorption, Central Europe 1. INTRODUCTION Hexachloro-1,3-butadiene (HCBD) is an industrial by-product that is produced during the manufacturing of various chlorinated hydrocarbons like vinyl chloride, trichloroethene or tetrachloroethene. HCBD is toxic and considered harmful for the environment and especially for aquatic ecosystems (Gillham, 1996; Taylor et al., 2003; Lecloux, 2004). Various processes have been investigated for the abatement of chlorinated hydrocarbons in aqueous solutions. Lee et al. (2017) investigated different oxidative processes using O3, H2O2 and UV photolysis. For the degradation of chlorinated volatile organic compounds in groundwater zero valent iron (ZVI) can also be used (Gillham and O’Hannesin, 1994; Rodrigues et al., 2017). Thereby, ZVI can also be installed in the form of permeable reactive barriers (Blowes et al., 2000; Henderson and Demond, 2007). Alternatively, activated carbon (AC) can be used for the removal of chlorinated hydrocarbons mainly through sorption (Peng et al., 2003; Pavoni et al., 2006). In this study, the physical and chemical remediation of HCBD contaminated groundwater was investigated. As a first step, laboratory studies on the kinetics and reduction capacity of different types of ZVI materials and adsorbents (activated carbon, zeolithes) were performed as basis for a pre-selection of the materials for the field tests. 1 University of Applied Sciences Upper Austria, A-4600 Wels, Stelzhamerstraße 23, c.lanzerstorfer@fh-wels.at) How to cite: Anzengruber, G., Lanzerstorfer, Ch. (2019) Remediation of Hexachloro-1,3-Butadiene Contaminated Groundwater. 2019 ”Air and Water – Components of the Environment” Conference Proceedings, Cluj -Napoca, Romania, p. 339-344, DOI: 10.24193/AWC2019_33. DOI: 10.24193/AWC2019_33