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负载型催化剂光催化氧化五氯苯酚钠的效果
引用本文:席北斗,刘纯新,孔欣,周岳溪,刘鸿亮,邱熔处.负载型催化剂光催化氧化五氯苯酚钠的效果[J].环境科学,2001,22(1):41-44.
作者姓名:席北斗  刘纯新  孔欣  周岳溪  刘鸿亮  邱熔处
作者单位:1. 中国环境科学研究院,北京,100012
2. 兰州铁道学院,兰州,730071
基金项目:国家“九五”科技攻关项目(969090502)
摘    要:研究以TiO2 为基本活性组分、空心玻璃珠为载体、硅酸钠为粘合剂的负载型催化剂的制备技术 .选取五氯苯酚钠 (PCP-Na)为处理对象 ,结合对催化剂比表面和晶型结构的表征 ,对制备的催化剂进行筛选评价 .实验结果表明 :在适当的条件下 (二氧化钛、空心玻璃珠、40%硅酸钠溶液重量比为 4∶20∶2,650℃下烧 3h)所制备的C3型催化剂不仅光催化活性高 ,且负载牢固 ,易与水分离 .对初始CODCr=400mg·L-1,PCP-Na=10mg·L-1的反应液 ,在光照强度为 30kW·m-2下 2hCODCr去除率大于 65% ,PCP-Na去除率大于 92%.试验进一步探讨C3型催化剂投加量、反应液初始浓度、供氧量对催化反应的影响 .

关 键 词:光催化氧化  二氧化钛  负载型催化剂  投加量  初始浓度  供氧量
文章编号:0250-3301(2001)01-04-0041
收稿时间:2000/5/24 0:00:00
修稿时间:2000年5月24日

Decomposition of Aqueous Sodium Pentachlorophenolate(PCP-Na) by Using TiO2 Coating Photocatalyst
Xi Beidou,Liu Chunxin,Kong Xin,Zhou Yuexi,Liu Hongliang and Qiu Rongchu.Decomposition of Aqueous Sodium Pentachlorophenolate(PCP-Na) by Using TiO2 Coating Photocatalyst[J].Chinese Journal of Environmental Science,2001,22(1):41-44.
Authors:Xi Beidou  Liu Chunxin  Kong Xin  Zhou Yuexi  Liu Hongliang and Qiu Rongchu
Institution:Chinese Research Academy of Environmental Science, Beijing 100012, China. xibeidou@263.net
Abstract:Titanium dioxide (TiO2) photocatalysts were coated on hollow glass beads by sodium silicate (Na2SiO3.9H2O) solution. The coated catalysts were characterized by BET, XRD. Their photoactivity were examined using photocatalytic degradation of sodium pentachlorophenolate(PCP-Na) and glucose solution. The impact of catalysts dosage, PCP-Na initial concentration, initial pH and oxygen concentration on reaction kinetics were also studied in detail. The experiments illustrated that the performance of C3-type catalysts was satisfactory. Conditions of the experiments were following: The initial concentration of PCP-Na and CODCr were 10 mg.L-1 and 400 mg.L-1, respectively, and illumination time was 2 hours and catalysts dosage was 2 g.L-1, the removal rates of CODCr and PCP-Na were above 65% and 92% respectively. Optimum dosage of C3-type catalysts was 2-2.5 g.L-1, DO was no less than 3 mg.L-1.
Keywords:photocatalytic oxodation  TiO2 coated photocatalysts  dosage  initial concentration  oxygen
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