多种载体对邻苯二甲酸二丁酯降解优势菌吸附性能的比较

Adsorptive properties of various carriers on dibutyl phthalate degradation bacteria

目的寻求廉价而有效的邻苯二甲酸二丁酯(DBP)降解优势菌吸附载体。方法以硅藻土、斜发沸石、丝光沸石和粉煤灰作为备选吸附载体,进行改性处理,分别测定备选材料对一定浓度DBP降解优势菌的吸附能力和吸附强度。结果改性的粉煤灰、斜发沸石、丝光沸石和硅藻土对DBP降解优势菌的吸附能力分别是原状载体的1.66、1.37、1.49和1.16倍。对各改性载体吸附能力的比较试验表明,硅藻土、斜发沸石、丝光沸石、粉煤灰的吸附能力分别为94.4%、84.0%、71.6%和44.2%;吸附强度依次为91.1%、90.1%、90.5%和72.1%;对初浓度为100mgL的DBP试验水样进行降解试验,24小时降解率分别为90.2%、89.9%、76.3%和62.4%。结论硅藻土、斜发沸石、丝光沸石和粉煤灰等吸附载体经过改性对DBP降解优势菌的吸附能力明显提高。各种载体对DBP降解优势菌的吸附能力和吸附强度从强到弱依次为:硅藻土、斜发沸石、丝光沸石、粉煤灰。

Objective Seeking cheap and effective carriers for adsorbing dibutyl phthalate （DBP） degradation dominant bacteria. Methods Diatomite, clinoptilolite, silk zeolite and coal fly ash were selected as reserve materials and modified. The adsorptive capacity and intensity of each carrier to DBP degradation bacteria were measured, Results The adsorptive capacity of coal fly ash, clinoptilolite, silk zeolite and diatomite to DBP degradation dominant bacteria was 1.66, 1.37, 1.49 and 1.16 times in turn to that of natural carriers. The comparative tests for each modified carrier indicated that the adsorptive capacity of diatomite, clinoptilolite, silk zeolite and coal fly ash was 94.4%, 84.0%, 71.6% and 44.2% in turn. The adsorptive intensity of above carriers was 91.1%, 90.1%, 90.5% and 72.1%. The degradation rate to 100mg/L DBP in 24h was 90.2%, 89.9%, 76.3% and 62.4% successively. Conclusion The adsorptive capacity of diatomite, clinoptilolite, silk zeolite, and coal fly ash to DBP degradation dominant bacteria was enhanced after being modified. The adsorptive capacity and intensity from strong to weak was diatomite, clinoptilolite, silk zeolite, and coal fly ash.