黄曲霉毒素B1降解产物及降解安全性评价研究进展

为推动黄曲霉毒素B_(1)(AFB_(1))降解技术的应用,寻求高效、快捷、安全的AFB_(1)降解技术,促进食品中黄曲霉毒素的防治工作,对AFB_(1)降解技术(物理降解技术、化学降解技术、生物降解技术)产生的降解产物以及降解后食品安全性评价研究的现状进行了论述,概括了降解技术的不足之处,并对降解技术的发展趋势进行展望。物理降解技术较适合大规模应用,但微波、脉冲电场、低温等离子体等技术仍处于研发阶段,无法确保该技术的安全性与可靠性。化学降解技术的研究比较常见,但存在食品感官品质变差,营养成分损失或破坏,易引入新的化学残留等不足。生物降解技术具有性质温和,不造成食品中营养成分大量损失且绿色环保等优点,但仍处于实验室研发阶段。在今后的研究中,应加强寻找新型纳米材料发展光降解技术、或各种技术联合使用、或利用基因工程联合酶法脱毒等新型技术,同时应更深入地研究降解机制、降解产物、降解路径以及降解产物的安全性。

消除农药残留的研究进展

本文从生物降解、化学降解、光化学降解及超声波、电离辐射、洗涤剂等方面综述了消除农药残留的研究进展。

Kinetic Modeling of the Photocatalytic Degradation of Methyl Orange by Supported TiO2

The photocatalytic degradation of methyl orange （MO） in UV/Supported-TiO2 system was investigated and a kinetic model was presented. The experimental results show that the photocatalytic degradation rate is favored by high concentration of dye in solution and is enhanced by the solution temperature. A simple kinetic model has been proposed which can describe the discoloration process in an adequate way. The calculated results obtained were in good agreement with experimental data. The model predicts the concentration of MO during the photocatalytic degradation process.