可见光/H_2O_2/海藻酸铁非均相催化降解吖啶橙的研究  

Heterogeneous degradation of acridine orange by ferric alginate under visible irradiation

作　　者：龙明策[1] 林金清[2] 陈建贤[2] 纪荣芳[2] 许庆清[2] 

机构地区：[1]上海交通大学环境科学与工程学院,上海200240 [2]华侨大学材料科学与工程学院,泉州362011

出　　处：《环境污染治理技术与设备》2005年第10期49-52,共4页Techniques and Equipment for Environmental Pollution Control

基　　金：华侨大学自然科研基金资助项目(03HZR5)

摘　　要：由海藻酸钠和氯化铁反应制备了海藻酸铁凝胶小球催化剂,考察了该催化剂的吸附和可见光下催化降解吖啶橙的性能。结果表明催化剂的吸附能力随pH升高而提高,且催化剂用量为40个凝胶小球时,可见光下吖啶橙能够在较宽pH值范围内脱色,脱色速率随H2O2的用量增加而增加,该反应符合Arrhen ius规律,其表观活化能为49.6 kJ/mol。自由基清除剂的加入不会降低脱色速率,表明催化反应不是羟基自由基的机理,而与高活性的类{Fe(IV)O}高价铁中间产物有关。Ferric alginate gel beads were prepared by sodium alginate and ferric chloride and used as heterogeneous Fenton catalysts. Its performance of adsorption and degradation acridine orange （AO） under visible light were studied. The results show that adsorption capacity increases with higher pH, and when the catalyst dosage is 40 beads, under visible light AO can be decolorized in broader pH range, and the rate of discoloration is increasing with more H202. The reaction is in accord with arrhenius rule, and its apparent activated reaction energy is determined as 49.6 kJ/mol. The rate of discoloration does not decrease with addition of ~ OH scavenge, it suggests that the photocatalytic degradation reaction mechanism has no connection with hydroxyl radical but the active similar ferryl intermediates.

关 键 词：海藻酸钠 非均相FENTON 吖啶橙 光降解 

分 类 号：X703[环境科学与工程—环境工程]