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本文研究了一新型细胞外聚合物WJ-I对水中重金属Cr(Ⅵ)的吸附特性。结果表明，WJ-I对Cr(Ⅵ)吸附的最佳pH为0.5～2.0。Cr(Ⅵ)的吸附可分为三个阶段；快速吸附阶段(5min)；一级动力学吸附阶段(10～40min)；吸附平衡阶段(50min以后)。整个吸附过程符合langmuir吸附模型。“,”Biosorption of Chromium(Ⅵ) was investigated by a Novel Bacterial exopolymers from Pseudomonas sp GX4-1. It was found that the optimum initial pH for Cr(Ⅵ) biosorption is 0.5-2.0; the biosorption process may be divided into the following phases:1)a fast biosorption phase with 75% Cr(Ⅵ) uptaken within 5 min: 2)first-order kinetics phase from 10 to 40min; 3)equilibrium phase; and biosorption process is fit for Languir model.