腐殖酸(HA)是自然环境中广泛存在的大分子难降解有机物。以多孔陶瓷滤球(PCFM)为载体,通过溶胶-凝胶法掺杂稀土元素Sr制备出复合光催化剂Sr-TiO2/PCFM,用以降解腐殖酸废水。结果表明:当HA初始浓度为20mg/L,pH=5.98,温度为37℃时,Sr-TiO2/PCFM对HA的降解率可达到86.82％。Sr-TiO2/PCFM重复利用3次后,对HA的降解率仍可维持在40％以上。
Humic acid (HA) is a kind of refractory organics which widely existed in natural environment.The nano-TiO2 film coated on porous ceramic filter media (PCFM) was prepared by sol-gel process and formed Sr-TiO2/PCFM multiplex photocatalyst,the degrade effect of HA with the photocatalyst was studied.The results showed that the degradation rate of HA could reach 86.82% when the initial concentration of HA was 20mg/L,pH 5.98 and temperature 37℃.The degradation rate of HA was still more than 40% after Sr-TiO2/PCFM reused for three times.
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基金资助
国家自然科学基金(51709254)
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