以改性聚酯颗粒为碳源去除饮用水中高氯酸盐  

Removal of perchlorate from drinking water using modified polyester particles as carbon source

作　　者：何芳[1] 李富生[2] 周海红[1] 牛玲玲[1] 

机构地区：[1]济南大学资源与环境学院,山东济南250022 [2]日本国立岐阜大学流域圈科学研究中心

出　　处：《中南大学学报（自然科学版）》2014年第12期4452-4457,共6页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(21107031);济南市科技发展计划项目(201202261)~~

摘　　要：以改性淀粉基聚酯（S-PBS）颗粒为固体碳源和生物膜载体,研究其去除饮用水中高氯酸盐的特性。研究结果表明：S-PBS颗粒仅在微生物作用下分解并为高氯酸盐降解菌（PRB）提供碳源,9 h内可将进水中2 mg/L的Cl O4^-降低到检测限以下。存在于该生物反应器中的Cl O4^-和NO3^-可同步去除,高质量浓度硝酸盐的存在会影响高氯酸盐的降解速率。水温对高氯酸盐的生物降解有较大影响。生物膜发育后聚合物在2 849,2 923及3180-3 430 cm^-1处峰值减弱,说明材料中的甲基和羟基官能团呈比例下降,颗粒单体组分可以持续被PRB用作碳源。微生物附着生长后,S-PBS颗粒表面会形成孔洞结构,进一步扩大微生物的附着面积,有利于形成更加稳定致密的生物膜,对PRB形成保护作用。Modified starch-based polyester particles were used as solid carbon source and biofilm carrier to remove perchlorate from drinking water. The results show that S-PBS can be only decomposed in the present of the microbes in bioreactor and provide carbon source for PRB. Influent perchlorate（2 mg/L） can be reduced to below the detection limit. Simultaneous perchlorate and nitrate degradation occurs when perchlorate and nitrate concentrations correspond to a typical perchlorate-contminated site. Effluent concentrations of perchlorate vary positively with temperature. With the development of biofilm, absorption bands at 2 923, 2 849, 3 180-3 430 cm^-1 are weak, which suggests that the content of methyl or hydroxyl group in particles decreases slightly. The monomer of S-PBS can be utilized as carbon source by perchlorate reducing bacteria（PRB）. The cavity can be formed on the particle surface, which increases the area for microbes to be attached. The formation of the cavity structure on the S-PBS surface is beneficial to further development of biofilm, which can protect PRB within the biofilm.

关 键 词：高氯酸盐 降解 固体碳 生物反应器 

分 类 号：X171[环境科学与工程—环境科学]