“…Similarly, sulfide and inorganic polysulfides are aggressive nucleophiles that facilitate important organic reactions, like the destruction of anthropogenic halocarbons (Barbash and Reinhard, 1989;Miller et al, 1998;Lippa and Roberts, 2002;Wu and Jans, 2006). They are involved in sulfidation and cross-linking reactions that produce biorefractory organic carbon in aquatic and sedimentary environments (Vairavamurthy et al, 1997a;Adam et al, 2000;Ciglenečki et al, 2000;Filley et al, 2002;Amrani and Aizenshtat, 2004;Amrani et al, 2007). In anoxic waters, they control redox processes by buffering Eh (Boulègue and Michard, 1979) and by stabilizing specific products in sometimes unexpected oxidation states (Helz et al, 2002;Vorlicek et al, 2004;Helz and Tossell, 2008).…”