光催化功能材料及其提升湖库水环境质量的验证研究

Study on photocatalytic functional material and verification of its application for improving water environment quality of lake and reservoir

为验证石墨烯基氧化钛光催化功能材料在实际工况条件下的适用性及其对污染水体的净化效果,分别选择云南省大理州西湖(ST-1)及浙江省舟山市嵊泗县的长弄塘水库(ST-2)进行为期105~107 d的野外原位围隔试验验证研究。结果表明:光催化功能材料与土著生物耦合(光催化耦合生态净化技术)对2种类型水体中污染物降解具有较好的效果,试验期间ST-1和ST-2水体中的氨氮、总磷浓度和COD分别下降71.8%、45.5%和27.3%以及3.8%、62.1%和33.3%;该技术实施后水体溶解氧浓度较稳定,分别为6.05~9.50和6.60~10.60 mg/L,水体透明度分别提升109.0%和185.7%;另外,该技术对藻类具有抑制作用,ST-1、ST-2试验组与对照组相比,藻类总生物量分别下降了30.3%和64.6%。

In order to verify the applicability of the photocatalytic functional materials,graphene based titanium oxides,under actual working conditions and their purification effect on polluted water,two sites were selected respectively in Xihu Reservoir of Dali Bai Autonomous Prefecture,Yunnan Province(ST-1)and Changnongtang Reservoir of Shengsi County,Zhoushan City,Zhejiang Province(ST-2),to carry out field in situ enclosure tests for 105-107 days.The results showed that the use of photocatalytic functional materials coupled with indigenous organisms(or photocatalysis coupling ecological purification technology)had a good effect on reducing pollutants in two different types of water.During the experiment,the concentrations of NH3,TP and COD decreased by 71.8%,45.5%and 27.3%together with 3.8%,62.1%and 33.3%,at ST-1 and ST-2 respectively.After the implementation of the technology,the concentration of dissolved oxygen in the water was relatively stable,which were 6.05-9.50 and 6.60-10.60,respectively.The transparency of water body was improved by 109.0%and 185.7%,respectively.In addition,the technology had inhibitory effect on algae.Compared with the control group,the total biomass of algae in ST-1 and ST-2 decreased by 30.3%and 64.6%,respectively.