Spontaneous electrochemical removal of aqueous sulfide
作者： P DUTTA , K RABAEY , Z YUAN , J KELLER
DOI: 10.1016/J.WATRES.2008.09.007
关键词:
摘要: most of the existing sulfide removal processes from wastewaters and waste gases require substantial amounts energy inputs. Here we present an electrochemical method by means a fuel cell that removes while producing energy. A lab scale was operated at ambient temperature neutral pH, which capable removing aqueous continuously for 2 months rate 0.62 +/- 0.1 kg S m(-3) d(1) net anodic compartment (NAC) (0.28 0.05 d(-1) total compartment, TAC). During continuous operation, on average, power generated 12 W m(3) NAC (5 1 TAC), with maximum capacity 166 (74 Potassium ferricyanide used as cathodic electron acceptor. Elemental sulfur identified predominant final oxidation product deposited anode. in this abiotic cell, not diminished presence organic donor (acetate) during batch experiments acetate concentration remained unchanged. This is particularly important selective wastewater where organics are essential downstream nutrient removal. anode appeared to limit operation after 3 necessitating periodic accumulated electrode. (C) 2008 Elsevier Ltd. All rights reserved.
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