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, in the Fe0/sulfite system, and SO4- was evidenced as the principal reactive species. The quite low removal efficiency of X-3B (less than 5%) after reaction for 90min with purging nitrogen gas suggests oxygen to be an essential factor for producing SO4- in the system. Optimal dosages of Fe0 and sulfite were suggested to be 0.5mM and 1.0mM, respectively, in the system as both the two chemicals would...
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