化工新型材料

化工新型材料 ›› 2022, Vol. 50 ›› Issue (6) : 231-235. DOI: 10.19817/j.cnki.issn1006-3536.2022.06.045

科学研究

TiO₂/沸石复合材料的吸附-光催化体系对氨氮的去除研究

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作者信息 +

Study on adsorption and photocatalysis integration system by Ti-Z composite for the removal of ammonia nitrogen from aqueous solution

Wang Guoqiao¹, He Lizhi¹, Liu Ya¹, Wang Jiawei¹, Chen Yao¹, Guo Xin²

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文章历史 +

Received
2021-03-08
Issue Date	Revised Date
2022-07-06	2021-03-08

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摘要

通过溶胶-凝胶法原位制备TiO₂/沸石的复合材料(Ti-Z),构建针对水中氨氮去除的吸附-光催化一体化体系。复合材料Ti-Z能够协同发挥沸石对氨氮的选择性吸附和TiO₂的光催化特性。结果表明:在碱性条件下(pH=9.8)反应60min后,Ti-Z对50mg/L氨氮溶液的去除可达18.6mg/g,高于纯沸石的吸附去除量(17.7mg/g)。碱性环境有利于TiO₂/沸石去除水中的氨氮,较弱酸环境中(14.4mg/g),体系的氨氮去除量有明显提高;光照时,曝气混合对体系中氨氮的去除提高不明显,不具有经济效益。

Abstract

TiO₂/zeolite composite (Ti-Z) was prepared by sol-gel method and applied in integrated adsorption-photocatalysis system for ammonia nitrogen removal from aqueous solutions.The results indicated that Ti-Z could synergistically remove ammonia nitrogen by zeolite adsorption and TiO₂ photocatalytic reaction.Under alkaline condition (pH=9.8),the removal capacity of ammonia nitrogen (50mg/L) on Ti-Z was 18.6mg/g,which was higher than that by simple zeolite adsorption (17.7mg/g).Alkaline environment was helpful for the treatment of ammonia nitrogen by Ti-Z composite,and it was more favorable and higher removal capacity than that in weak acid environment (14.4mg/g).Aeration had insignificant improvement on ammonia nitrogen removal in this system,and was not suggested in consideration of economy.

关键词

吸附-光催化 / 二氧化钛 / 沸石 / 氨氮 / 复合材料

Key words

adsorption-photocatalysis integration / TiO₂ / zeolite / ammonia nitrogen / composite

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TiO₂/沸石复合材料的吸附-光催化体系对氨氮的去除研究[J]. 化工新型材料, 2022, 50(6): 231-235 DOI:10.19817/j.cnki.issn1006-3536.2022.06.045

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