Abstract: Valonia extract was oxidized by H2O2. The modified valonia tannin was investigated for adsorption removal of copper in aqueous solution. The influences of pH value，initial Cu2+ concentration on adsorption capacity of Cu were discussed. The result indicated that oxidization of valonia tannin was well-fitted by the Freundlich equation. The copper adsorption capacity of modified tannin was mainly influenced by the initial concentration. When it was 20mg/L，there was no adsorption，and the maximum adsorption capacity reached 39.300 mg/g when the initial concentration was 100 mg/L.

摘要： 以橡椀栲胶为原料，通过双氧水氧化降解改性，研究水解类橡椀单宁改性后对铜离子溶液的吸附沉淀以及pH值、金属溶液初始浓度对铜离子吸附沉淀容量的影响和规律。结果表明，氧化橡椀单宁对Cu2+的吸附平衡符合Freundlich方程。改性后吸附沉淀容量受初始浓度影响较大，初始浓度为20 mg/L时基本不发生吸附沉淀，试验最大初始浓度100 mg/L时吸附量达到39.300 mg/g。