高 pH下邻菲罗啉金属配合物催化氧化降解羟丙基瓜尔胶

Catalytic Oxidation of Hydroxyethyl Guar Gum by 1， 10-Phenanthroline Metal Complex under High pH

张 洁 杨朋威 顾雪凡 汤 颖 陈 刚 薛丽丽 姬盼盼 王海洋 张建甲

ZHANG Jie YANG Pengwei GU Xuefan TANG Ying CHEN Gang XUE Lili JI Panpan WANG Haiyang ZHANG Jianjia

为了获得高 pH条件下 Fenton体系的高效催化剂， 选取了 Fe2+、 Fe3+、 Co2+、 Ni2+、Cu2+、 Zn2+六种常见金属离子与邻菲罗啉（L）在摩尔质量分别为 0.2 mol/L 下等体积混合制备了配合物 Fe（Ⅱ） L、 Fe（Ⅲ） L、 CuL、 CoL、 NiL 和ZnL， 评价了这 6种配合物作为催化剂在高 pH条件下催化 H2O2氧化降解羟丙基瓜尔胶的效果。结果表明， 该系列配合物都有一定的催化效果， 其中 CuL的催化效果最佳， 在 pH7.0～14.0的范围内均具有较好的催化效果。CuL催化 H2O2降解羟丙基瓜尔胶的作用良好， 在温度 45℃、 pH10、 H2O2加量为羟丙基瓜尔胶质量的 10.0%， 催化剂 CuL加量为H2O2质量 5.0%的情况下降解反应 40 min后， 羟丙基瓜尔胶体系的相对黏度由 14降低至 1.2， 与水黏度接近， 相对分子质量从 200万降至 2864， COD值从 22.49 g/L降至 8.73 g/L， 增加双氧水加量为羟丙基瓜尔胶质量的 25.0%， 降解 4 h可将 COD值降至 41 mg/L。图 5参15

To explore the high efficiency catalyst of Fenton system under the condition of high pH，Fe2+，Fe3+ Co2+，Ni2+，Cu2+ and Zn2+ salts was selected to react with 1， 10-phenanthroline to prepare the corresponding metal complexes by mixing the 0.2 mol/L two components with the same volume，and then the catalytic activity of the complexes catalyzing H2O2 oxidative to degrade hydroxypropyl guar gum under high pH conditions was evaluated. The results showed that the six complexes all had certain catalytic effect of H2O2，and CuL was the best one，which performed good catalytic effect in the range of pH 7.0—14.0. Under the condition of 45℃，pH=10.0，with H2O2 amount of 10.0% to the mass of hydroxypropyl guar gum，and Fe（Ⅱ） L amount of 5.0% to the mass of H2O2，and degrading for 40 min，the relative viscosity of the hydroxypropyl guar gum system reduced from 14 to 1.2，close to the water’ s viscosity；the relative molecular weight was reduced from 2 million to 2864；the COD value was reduced from 22.49 g/L to 8.73 g/L. Increasing the amount of H2O2 to 25.0% of the mass of hydroxypropyl guar gum，the COD values could be reduced to 41 mg/L within 4 hours

10.19346./j.cnki.1000-4092.2017.03.031