Potential for Persulfate Degradation of Semi Volatile Organic Compounds Contamination

Abstract

Semi Volatile Organic Compounds (SVOCs) are common contaminants found in brownfield sites that used to be agrochemical plants, chemical storage sites, and industrial areas. Chemical oxidation showed great potential to provide a rapid, cost-effective approach for SVOCs contaminate sites. Chemical oxidation using persulfate was demonstrated by degrading both lab samples and on-site samples from a local o-ansidine contaminated site in this study. The soil samples were mixed with persulfate at different ratios, while adding supplements for the purpose of persulfate thermal activation and pH control. Experiments for optimal usage and treatment duration were also investigated to provide guidance for following demonstration project. Soil samples were analyzed before and after the treatments to compare the o-ansidine concentration changes. The results suggested an optimal ratio of persulfate at 0.5% (in w/w) for this study, with 90% or more removal of most samples in 3 days, at an average cost of oxidants per ton of soil around 800 RMB. This study demonstrated the potential of persulfate oxidation as a novel and reliable approach for o-ansidine contaminated soil, as well as the possibility of extending the remediation concept for other organic contamination scenarios. In addition, persulfate oxidation could also be combined with other remediation technology in future due to its simplicity and convenience.

Decomposition of sodium dodecylbenzene sulfonate surfactant by Electro/Fe2+-activated Persulfate process from aqueous solutions

“…Since in persulfate process iron anodes were the only source of ferric to active persulfate anions in reactor and detection of the amount of released iron on the surface of anode (Gu et al, 2013) and Fe 2+ recreation via continuous regeneration of Fe 3+ on the surface of cathode (reaction 17) were controlled by applied voltage to the electric cell (Lin et al, 2013;Wu et al, 2012 …”

“…This oxidant has been used for treating several pollutants like ethyl carbonate (Gu et al, 2013), chlorophenol (Sohrabi et al, 2013), bisphenol A (Jiang et al, 2013) and so forth. As mentioned above, one of the ways to activate persulfate is using metal ions such as iron and cobalt.…”