细菌FM326(Arthrobacter.sp)在不同水样中对阿特拉津的降解教材分析.docVIP

细菌FM326（Arthrobacter. sp） 摘 要为了解在不同水样中对除草剂阿特拉津的降解作用，本实验测定了在不同（盘龙江下游水样、农药厂污水水样、晋宁蔬菜地水样）中对除草剂阿特拉津的降解效率。结果表明：（）盘龙江下游水样农药厂污水水样晋宁蔬菜地水样随着降解时间的加长，阿特拉津的浓度在不断地减少。（2）降解阿特拉津3天后，阿特拉津浓度基本不再变化。据此得出：在不同中，关键词：不同、、阿特拉津浓度 Bacteria FM326 (Arthrobacter. sp) in different water samples Abstract To investigate the herbicide atrazine by bacteria FM326 in different water sample, this experience determined atrazine degradation efficiency by bacteria FM326 in different water sample （the tail water sample of Panlongjiang River, the waste water sample of insecticide factory, the water sample of vegetable field in Jinning）. The result showed that: (1) The bacteria FM326 in the tail water sample of Panlongjiang River and the waste water sample of insecticide factory had strong ability of survival. Some bacteria in the water sample of Jinning vegetable field would affect the normal growth metabolism of bacteria FM326, but as time had gone by, the influence would be fade away, then the bacteria FM326 could degrade atrazine well. (2) With the degradation time became longer, the concentration of atrazine decreased. (3) After the degradation of atrazine had taken place for 3 days, the concentration of atrazine would be no longer changed. We could know that bacteria FM326 had strong ability of survival and degradation in different water sample. Key words：Different Water Sample; Bacteria FM326; The Concentration of Atrazine 水样中细菌FM326对阿特拉津的降解 1. 引言 阿特拉津，又名莠去津(Atrazine)，化学名称为 2-氯-4-乙胺基-6-异丙胺基-1，3，5-三嗪。纯品为无色结晶，原粉为白色粉末，纯度在92 %以上[1]。阿特拉津是 1954-1955年发现的一种三氮苯衍生物，它能通过植物的根系和叶片进入植物体内，并沿木质部和韧皮部在植物体内移动，其溶解性好，被土壤吸附能力差，因而较易进入较深的土层，对深根性多年生草本植物有较强的抑制作用。阿特拉津虽然是一种低毒除草剂，但它在环境中不易降解，水溶性强，持效期长，喷洒到土壤和作物表面后，仅有一小部分落到靶标上，大部分进入到土壤，易被雨水、浇灌水淋溶至较深土层，或是随地表径流进入河流、湖泊，对地下水和地表水造成污染[2]。近年来，阿特拉津 因使用量大、残留期长、环境水体中检出率高[3]和具有内分泌干扰作用等而受到广泛关注[4]。 阿特拉津在世界范围内已经使用了近 40 年, 其在环境中的扩散引起广泛重视, 因此研究这种化合物的生物降解机理十分必要。虽然自1982年以来先后在诺卡氏菌属(N ocard ia)、 红球菌属(R hodococcus)、 不动杆菌属(A cinetobacter)、 土壤杆菌属(A g robacterium)和假单胞菌属(P seudom onas)等多