Biosorption and Degradation of Benzopyren Contaminated Wastewater by Microorganisms

以具有致癌、致畸和致突变作用的苯并(a)芘(BaP)为目标污染物，研究真菌黑曲霉和细菌假单胞对污染废水中BaP的吸附与降解。实验条件下，BaP的有效吸附浓度范围是c(BaP)<160 μg/mL，降解浓度范围是c(BaP)<80 μg/mL；对BaP有效吸附的温度范围是20℃~40℃，适合的降解温度是25℃~30℃；吸附平衡时间为60 min，降解平衡期为6 d。实验结果为难降解的持久有机污染物的快速回收与去除提供了理论依据。 The biosorption and degradation of benzopyren (BaP) which is related to toxicity, mutagenesis and carcinogenesis were investigated through the fungus Aspergillus niger and Pseudomonas sp. Under the experimental conditions, the optimal concentration range of BaP was<160 μg/mL by biosorption of these two microorganisms, and <80 μg/mL by degradation. The most suitable temperature range for biosorption of BaP was 20˚C-40˚C, and 25˚C-30˚C for degradation. The suitable time of BaP biosorption for above two microorganisms was 60 min, and 6 d for BaP degradation. The experimental results provided a theoretical basis for rapid recovery and removal of persistent organic pollutants.