磁性活性炭的制备及去除河涌水中COD的研究

采用改性磁种——磁性活性炭复合吸附材料结合磁分离法处理河涌水,考察了絮凝剂种类及用量、改性磁种投加量、作用时间、磁场强度等对河涌水中COD的去除效果。结果表明,采用改性磁种——磁性活性炭吸附并结合高梯度磁分离处理河涌水COD效果明显,在聚合氯化铝(PAC)用量10g/L、改性磁种用量30g/L、改性磁种作用时间20min、分离磁场强度8 000kA/m的条件下,原水含COD 90.18mg/L,出水含COD可降至6.59mg/L,除COD率达92.69%,达到《地表水环境质量标准》(GB 3838—2002)中的Ⅰ类水COD标准。

Research on Preparation of Magnetic Activated Carbon and Its Application in Removal of COD from River Water

River water was treated by modified magnetic seed magnetic-activated carbon composite adsorption material combined with magnetic separation method.Influences of flocculant type and dosage,modified magnetic seed dosage,action time and magnetic field intensity on removal rate of COD were discussed.The results show that with modified magnetic seed,high gradient magnetic separation is effective to treat COD in river inflow water.Under the conditions of PAC dosage of 10 g/L,modified magnetic seed dosage of 30 g/L,modified magnetic seed action time of 20 min and separation magnetic field strength of 8 000 kA/m,COD content in effluent drops from 90.18 mg/L of raw water to 6.59 mg/L,and COD removal rate is 92.69%,which meets the class I water COD standard in the environmental quality standard for surface water(GB 3838—2002).