无机材料对PVA-H_3BO_3包埋固定化方法的改进  

Improvement of PVA-H_3BO_3 Immobilization Method with Inorganic Materials

作　　者：毕海涛[1] 张兰英[1] 刘娜[1] 杨国军[1] 徐国欣[1] 朱博麟[1] 

机构地区：[1]吉林大学环境与资源学院,长春130026

出　　处：《吉林大学学报（地球科学版）》2011年第1期241-246,共6页Journal of Jilin University：Earth Science Edition

基　　金：国家自然科学基金项目(40702039);国家自然科学基金青年基金项目(20090879029);国家水体污染控制与治理科技重大专项(2008ZX07207-007-05)

摘　　要：利用无机材料活性炭纤维、泥炭、蛭石、高岭土、珍珠岩、钙基膨润土、粉末活性炭和硅藻土对PVA-H3BO3固定化方法进行改进,包埋固定已筛选的阿特拉津降解菌,制成生物微球,在10℃条件下考察其对生物微球溶胀行为及生物微球去除阿特拉津效果的影响。结果表明,空白生物微球和高岭土改性生物微球对AT的去除符合零级动力学方程,其余10种生物微球对AT的去除符合一级动力学方程。活性炭改性生物微球对AT的去除半衰期最短,为2.61h;硝化泥炭改性生物微球对AT的去除半衰期最长,为39.93h。结合实验现象和扫描电镜分析结果显示,强碱泥炭、硅藻土、蛭石、130℃烘干泥炭、磺化泥炭、珍珠岩改性生物微球和未添加无机材料改性的生物微球未发生溶胀现象。Inorganic materials such as activated carbon fiber,peat,vermiculite,kaoline,perlite,calcium base bentonite,activated charcoal and diatomite were employed as the modifier for PVA-H3BO3 immobilization method.A screened atrazine degradation bacterium was embedded to make bio-beads and the impact of above describedinorganic materials on atrazine removal capacity and the swelling of bio-beads were investigated at 10℃.The results showed that the atrazine removal by unmodified bio-beads and kaoline modified bio-beads followed zero-order kinetics equation,while others followed first-order kinetics equation.The atrazine removal by activated charcoal modified bio-beads had the shortest half-life of 2.61 h and the atrazine removal by nitrifying peat modified bio-beads had the longest half-life of 39.93 h.According to the experiment and SEM analysis,peat modified by sodium hydroxide,diatomite,vermiculite,peat heated at 130℃,sulfonated peat,perlite modified bio-beads and bio-beads unmodified by inorganic material did not swell.

关 键 词：聚乙烯醇 硼酸 无机材料 固定化 阿特拉津 

分 类 号：X505[环境科学与工程—环境工程]