• 关键词：同步脱氮除硫  基质  产物  发光细菌  急性毒性

• 基金项目：国家自然科学基金资助项目(No.30770039);国家高技术研究发展计划(863)项目(No.2006AA06Z332);国家科技支撑计划(No.2008BADC4B10)

• 陆慧锋
• 浙江大学环境工程系, 杭州 310029

• 赖玢洁
• 浙江大学环境工程系, 杭州 310029

• 蔡靖
• 浙江大学环境工程系, 杭州 310029

• 陈婷婷
• 浙江大学环境工程系, 杭州 310029

• 郑平
• 浙江大学环境工程系, 杭州 310029

• 摘要：为了研究同步脱氮除硫工艺基质及产物对同步脱氮除硫过程的影响,采用发光细菌法测定了该工艺基质及产物的急性毒性.试验结果表明,硫化物、硫酸盐、亚硫酸盐、硝酸盐、亚硝酸盐的15min-半抑制浓度(即IC₅₀)分别为78.1、12077.8、254.5、3852.1、1066.3mg·L^-1.按照等效浓度混合法测定,各基质及产物的联合毒性为:硫化物与硫酸盐、硫化物与硝酸盐、硫化物与亚硫酸盐均呈加成作用;硫化物与亚硝酸盐呈协同作用;硫化物、硫酸盐、亚硫酸盐、硝酸盐、亚硝酸盐5元混合体系呈加成作用.

• Abstract：To make clear the effect of substrates and products on process performance in a denitrification-desulfurization reactor,the acute toxicity of the substrates and products to Photobacterium phosphoreum was studied using the 15-min half inhibitory concentration (IC₅₀) at pH=7.50±0.05. The relative luminosity of P. phosphoreum decreased as the concentration of substrate and product increased and there was a good linear correlation between the toxicity of substrate and product and their concentrations. Individual toxicity tests indicated that the IC₅₀ (mg·L^-1)of sulfide was 78.1,sulfate 12077.8,sulfite 254.5,nitrate 3852.1 and nitrite 1066.3. Using the equivalent concentration mixing method,the combined toxicity of substrates and products showed that sulfide and sulfate,sulfide and sulfite,sulfide and nitrate were additive,while the combined effect of sulfide and nitrite was synergistic. The combined effects of all substrates and products were also additive.

• Key words：Simultaneous denitrification-desulfurization  photobacterium  acute toxicity  Substrates and products

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