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中文摘要：
利用自制微型纳米TiO2光催化反应器对不同初始浓度的Hg^2＋溶液进行光催化还原实验，利用Hg^2＋-硫氰酸盐-罗丹明B离子缔合物分光光度法测定溶液中剩余Hg^2＋的浓度，表征Hg^2＋的光催化还原效果．采用三波长分光光度法有效地消除了TiO2悬浮体系中的浑浊对测定的干扰．讨论了光催化还原的最佳条件及其在消除工业废水中有毒物质Hg（Ⅱ）方面的应用．结果表明：纳米TiO2对低浓度Hg^2＋溶液光催化还原效果显著，还原率可达90％以上，并且可以大幅降低工业废水中Hg（Ⅱ）的浓度．
英文摘要：
A self-made micro-reactor of nano-TiO2 photocatalysis was used to carry out photocatalytic reduction experiments of Fig（ Ⅱ） with different initial concentrations. Then the residual Fig（ Ⅱ ） in the solutions was determined by using spectrophotometry with Thiocyanate-Rhodamine B- Polyvinyl Alcohol. Considering the influence of TiO2 suspension system on the absorbency, three- wavelengths spectrophotometry was proposed to eliminate the interference of TiO2. The optimum conditions and effect of photocatalytic reduction of Hg2 ＋ by TiO2 as well as its application in removing toxic Fig（ Ⅱ ） in industrial waste water samples were investigated. It was showed that photo- catalytic reduction of Fig2＋ by TiO2 had a remarkable effect on low concentrations of mercury and the reduction rate was over 90 %. The method could dramatically reduced the content of toxic Fig（ Ⅱ ） in industrial waste water samples.
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