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采用摇瓶振荡培养法,研究了2-羟基-3-萘甲羟肟酸(H205)在4种厌氧条件下的生物降解性。结果表明:在整个试验周期内,各种非生物因素对H205的厌氧生物降解过程的影响可忽略不计。H205在反硝化、硫酸盐还原与Fe(Ⅲ)还原体系中的生物降解效率优于一般厌氧处理。H205在不同的厌氧条件下的降解速率由低到高依次为一般厌氧处理、硫酸盐还原处理、反硝化处理以及Fe(Ⅲ)还原处理。Fe(Ⅲ)是H205厌氧生物降解的最适宜电子受体。H205在不同厌氧条件下的生物降解都符合一级动力学模型,一般厌氧条件、反硝化条件、硫酸盐条件和Fe(Ⅲ)条件下的动力学方程分别为C=29.86e0.014 77 t,C=29.91e0.042 76 t,C=29.89e0.026 23 t,C=29.95e0.055 97 t。最后初步探讨了H205的厌氧生物降解机理。
The biodegradability of 2-hydroxy-3-naphthylhydroxamic acid (H205) under 4 anaerobic conditions was studied by shake flask culture. The results showed that the effects of various abiotic factors on the anaerobic biodegradation process of H205 were negligible throughout the experimental period. The biodegradation efficiency of H205 in denitrification, sulfate reduction and Fe (Ⅲ) reduction system is better than that of general anaerobic treatment. H205 under different anaerobic conditions, the degradation rate from low to high followed by general anaerobic treatment, sulfate reduction, denitrification and Fe (Ⅲ) reduction. Fe (Ⅲ) is the most suitable electron acceptor for H205 anaerobic biodegradation. The biodegradation of H205 under different anaerobic conditions is in accordance with the first-order kinetic model. The kinetic equations under general anaerobic conditions, denitrification conditions, sulfate conditions and Fe (Ⅲ) conditions are C = 29.86e0.0147 t, C = 29.91e0.042 76 t, C = 29.89e 0.026 23 t, C = 29.95e 0.055 97 t. Finally, the anaerobic biodegradation mechanism of H205 was discussed.