摘要
为了进一步提高乙酰甲胺磷残留的降解效果,该文在前期乙酰甲胺磷残留纳米TiO2-紫外光催化降解工艺优化研究的基础上,重点就通入气体、外加H2O2、添加铁离子、铜离子及其与H2O2的复配效果、添加乙醇和丙酮等对乙酰甲胺磷光催化降解过程的影响进行了研究。结果表明,氧气比例相对较高的反应气氛、添加H2O2、Fe3+、Cu2+能促进乙酰甲胺磷的光催化降解;而乙醇、丙酮的添加不利于乙酰甲胺磷的光催化降解。在前期确定的乙酰甲胺磷的紫外光-纳米TiO2反应体系中(20mg/L乙酰甲胺磷溶液、0.1g/L纳米TiO2、pH值6.7、反应温度25℃),添加0.2mmol/L的Cu2+和10mmol/L的H2O2,并通入N2:O2为20:80的反应气氛时,反应20min后,光催化降解率即可达98.03%。该研究可为乙酰甲胺磷农药残留的降解提供参考。
In order to improve the degradation efficency of acephate residue, the effects of H2O2, metal ions, gas ratio, ethanol, ketone or the combination of H2O2 and metal ions on the photodegradation efficiency of acephate by UV TiO2 process were examined, based on the former results of photocatalytic degradation of acephate. The results indicated that the addition of gas with higher oxygen ratio, H2O2, Fe3＋ or Cu2＋ were favorable for the degradation. While the degradation of acephate with the the addition of ethanol or acetone was low. The optimum conditions was as follow： the initial concentration of acephate 20mg/L, concentration of TiO2 0.1 g/L, temperature of 25℃, pH value of 6.7, concentration of Cu2＋ 0.2 mmol/L, concentration of H202 10 mmol/L, and bubbling gas composed of N2 and O2 （20：80）. Under this condition, the degradation rate was 98.03% within 20 min. This study provide a reference for the degradation of acephate residue.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2012年第16期275-281,共7页
Transactions of the Chinese Society of Agricultural Engineering
基金
上海市自然基金项目(NO.10ZR1420700)
上海市研究生创新基金项目(NO.JWCXSL1022)
上海市研究生创新基金项目(NO.JWCXSL1102)
