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当前位置: 首页 > 文章 > 活性炭负载的TiO_2对蔬菜中残留乐果的光催化降解作用 安徽农业科学 2020 (4) 164-167+174
Position: Home > Articles > Photocatalytic Degradation of Residual Dimethoate in Vegetables by Activated Carbon Loaded Titanium Dioxide Journal of Anhui Agricultural Sciences 2020 (4) 164-167+174

活性炭负载的TiO_2对蔬菜中残留乐果的光催化降解作用

作  者：
怀海霞;张秀秀;李少华;薛秀恒
单  位：
安徽大学物质科学与信息技术研究院;安徽农业大学茶与食品科技学院
关键词：
乐果;TiO_2;活性炭负载;光催化降解;蔬菜
摘  要：
探讨了活性炭(AC)负载的TiO_2对蔬菜中残留的农药乐果的光催化降解作用。采用Sol-Gel法在酸性条件下制备TiO_2和AC负载的TiO_2(TiO_2/AC),并用钼酸铵分光光度法测定光催化降解前后乐果溶液的浓度。结果表明,室温下TiO_2降解乐果的最适时间为4 h,最适TiO_2质量浓度为1 000 mg/L,最适降解pH为11。AC负载的TiO_2复合物显著提高了TiO_2对乐果的降解率;在复合物中,每30 mL TiO_2溶胶中AC的最佳加入量为1 g;负载型复合物的降解作用对蔬菜的营养成分影响不大。由此得出结论:负载型AC/TiO_2复合物能更有效地降低乐果的残留。
译  名：
Photocatalytic Degradation of Residual Dimethoate in Vegetables by Activated Carbon Loaded Titanium Dioxide
作  者：
HUAI Hai-xia;ZHANG Xiu-xiu;LI Shao-hua;Institute of Physical Science and Information Technology of Anhui University;School of Tea and Food Science and Technology,Anhui Agricultural University;
关键词：
Dimethoate;;TiO_2;;Activated carbon loading;;Photocatalytic degradation;;Vegetable
摘  要：
The photocatalytic degradation of dimethoate by activated carbon supported titanium dioxide(TiO_2) was studied.TiO_2 and activated carbon loaded TiO_2(TiO_2/AC) were prepared by Sol-Gel under acidic conditions.The concentration of dimethoate solution before and after photocatalytic degradation was determined by ammonium molybdate spectrophotometry.The results showed that the optimum time for dimethoate degradation by TiO_2 at room temperature was 4 h,and the optimum TiO_2 concentration was 1 000 mg/L and pH was 11.Activated carbon loaded TiO_2 complex significantly increased the effect of TiO_2 on dimethoate.In the complex,the optimum amount of activated carbon per 30 mL TiO_2 sol was 1 g,and the degradation of loaded complex had little effect on the nutritional composition of vegetables.It is concluded that the loaded activated carbon/TiO_2 complex can reduce the residue of dimethoate more effectively.

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