紫外发光二极管与脉冲紫外对藻类及其衍生有机物的控制机制研究

项目名称： 紫外发光二极管与脉冲紫外对藻类及其衍生有机物的控制机制研究

项目编号： No.51308224

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 建筑科学

项目作者： 欧桦瑟

作者单位： 华南理工大学

项目金额： 25万元

中文摘要： 紫外（UV）照射技术应用于高浊高有机物含藻水预处理的关键是克服传统汞灯的低穿透率、波长单一和藻类复活等问题。脉冲紫外（PUV）光源具有连续发射光谱和高穿透率，有望成为含藻水新型预处理方法。课题以单波长紫外发光二极管（UV-LED）结合复合表征方法从光合系统、酶系统和基因系统三方面研究UV破坏藻类细胞的分子机制，探索最佳杀藻波长-照射强度分布模式，优化选择PUV光源类型；采用滤光技术明确紫外、可见光和红外波段PUV照射对藻类细胞及其衍生有机物的去除机理；基于实际水体杂质成分特征，研究无机颗粒、天然有机物、无机盐等对PUV处理含藻水的影响，确定主要影响因子，寻求提高PUV处理效率的有效方法；基于机理研究，采用计算流体力学从水力分布和光强分布等方面优化设计PUV反应装置。通过本课题研究，阐明PUV波长分布、照射强度与藻类死亡率的内在数学关系等问题，为PUV在含藻水预处理的应用提供理论基础。

中文关键词： 藻类；微囊藻毒素；持久性有机污染物；发光二极管；光催化

英文摘要： Low penetration, single emission wavelength and low irradiation density were the critical limitations of UV mercury vapor lamp for the pre-treatment of algae-contained water. Novel pulsed ultraviolet (PUV) light source is characterized by continuous emission spectrum and high penetration, and it can be an option for algae-contained water pre-treatment. In current study, the ultraviolet light emitting diode (UV-LED) with single wavelength will be used to assess the intrinsic decomposition mechanisms of photosynthesis, enzyme and gene systems in algae cells. This study will provide several optimized "wavelength-irradiation density" distribution patterns for PUV selection. After determination of PUV type, light wavelength filter technique will be used to identify the removal mechanisms of algae cells and derived organic matter by independent UV, visible and infrared wave bands of PUV. The influence experiments using inorganic particle, natural organic matter and inorganic salt will be conducted, while the principal influence factors will be determined, which will provide useful information to improve the PUV performance. The computational fluid dynamics will be used to optimize the hydraulic distribution and irradiation density distribution in PUV device. All these studies will determine the intrinsic mathematic co

英文关键词： algae；microcystin；persistent organic pollutant；light emitting diode；photocatalysis