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中文摘要：
比较了四环素（TC）、土霉素（OTC）和金霉素（CTC）这3种四环素类物质在不同pH条件下的光降解和光催化降解速率。结果表明，在紫外光（uV）作用下3种四环素类物质的降解速率由高到低依次为OTC、CTC和TC，而在UV—TiO2光催化体系下，pH值为3．0～7．0时3者的降解速率无明显差异；碱性条件有利于TC、OTC和CTC的光降解和光催化降解，且降解过程中有NH4＋生成。
英文摘要：
Comparisons were made between tetracycline （ TC ） , oxytetracycline （ 0TC ） and chlortetracycline （ CTC ） in photodegradation and photocatalytic degradation in solutions different in pH. Results show that under UV light, they fol- lowed the order of OTC 〉 CTC 〉 TC in photodegradation rate. However, under UV - Ti02 photocatalysis, they demon- strated little difference in solutions with pH in the range of 3.0 - 7.0. Increasing solution pH facilitated both the photodeg- radation and photocatalysis degradation of TCs, and NH4 ions were generated during these processes.
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