非均相Fenton体系中无机助剂对亚甲基蓝脱色的影响

直接使用有机过渡金属化合物二茂铁作为催化剂，研究了非均相Fenton反应中亚甲基蓝的降解，并考虑了实际排放的印染废水中存在的无机助剂，进一步分析了典型无机助剂CuSO4、NaCl、Na2CO3、Na2SO4、Na2S的存在对该非均相Fenton体系的影响，结果表明：直接使用二茂铁做催化剂反应120min后，亚甲基蓝的剩余率为0．6％，羟基自由基的表观生成率为83．4％。NaCl、Na2CO3、Na2SO4、Na2S的加入会阻碍反应的进行，而CuSO4的加入会促进反应的进行。

Effect of inorganic additives on the removal of Methylene Blue in heterogeneous Fenton system

The discoloration of Methylene Blue(MB) using a ferrocene/Fenton system was studied. A series of experiments were performed to analyze the effect of several typical inorganic additives, including CuSO₄, NaCl, Na₂CO₃, Na₂SO₄ and Na₂S. The results revealed that under the optical conditions, residual MB in solution of 0.6% could be achieved in 120 min, and the generation efficiency of hydroxyl radicals was 99.8%. ·OH generated in solution were quenched by SO₄^2-, Cl^-, CO₃^2- and consumed by S^2-. Thus, addition of NaCl, Na₂CO₃, Na₂SO₄ and Na₂S resisted the degradation of MB. Because of the other Fenton-like system composed of Cu²⁺ and H₂O₂ could generate extra ·OH, addition of CuSO₄ accelerated the degradation of MB.