基于O3H2O2处理船舶压载水过程中形成溴酸盐的研究

船舶压载水异地排放是造成外来生物入侵的主要途径之一,为此需对船舶压载水进行处理,但在杀灭有害生物的同时也产生了致癌性有毒化学副产物。本研究主要研究O₃/H₂O₂处理船舶压载水过程中溴酸盐的生成,并考察了温度、pH、溴离子浓度、H₂O₂/O₃摩尔比对其生成过程的影响。结果表明,溴酸盐含量随温度升高而降低,随溴离子含量的增加而升高,随pH增加而增加,H₂O₂/O₃摩尔比存在一个最佳范围(0.5~1)。从工程实际出发,建议处理后的船舶压载水采用中和处理手段以降低对海洋环境的负面影响。

Bromate Formation from Ballast Water Treatment by O3/H2O2 Advanced Oxidation Process

Ballast water discharges are internationally recognized as a major source of nonindigenous species introductions to marine ecosystems. To reduce the risk of introducing non-native species, ballast water must be treated. However, many harmful chemical by-products are formed during ballast water treatment. In this paper, bromate formation from ballast water treatment by O₃/H₂O₂ process was investigate, along with changes in temperature, pH, bromide initial concentrations and H₂O₂/O₃ molo ratio. The results indicated that bromate concentrations decreased with increased temperature. An increase in bromide concentrations and pH enhanced the formation of bromate. The optimal H₂O₂/O₃ molo ratio was 0.5 ~ 1 with the lowest formation of bromate. We highly suggest that treated ballast water should be neutralized prior to discharge to reduce the adverse impact to marine ecosystem.