细菌胞外高聚物对水中六价铬的生物吸附特性

BIOSORPTION OF CHROMIUM(Ⅵ) IONS FROM AQUEOUS SOLUTION BY A NOVEL BACTERIAL EXOPOLYMERS

本文研究了一新型细胞外聚合物 WJ- I对水中重金属 Cr( )的吸附特性。结果表明 ,WJ- I对 Cr( )吸附的最佳 p H为 0 .5～ 2 .0。Cr( )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 ( 1 0～ 40 min) ;吸附平衡阶段 ( 50 min以后 )。整个吸附过程符合

Biosorption of Chromium(Ⅵ) was investigated by a Novel Bacterial exopolymers from Pseudomonas sp GX 4-1. 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.