Study on adsorption performance of DMAEA modified linen fabric with ultraviolet light
In order to expand the application of textile products in the field of heavy metal ion adsorption,linen fabric was used as raw material,and dimethylaminoethyl acrylate(DMAEA)was successfully grafted onto the fabric through UV-modification,the modified linen fabric adsorption material L-g-DMAEA was made.The morphology and chemical structure of linen fabric and modified product L-g-DMMEA were characterized and analyzed using SEM,EDX and FTIR.The adsorption performance of L-g-DMMEA was tested using Cu2+as an example.The results showed that the adsorption efficiency of Cu2+on linen fabrics before and after modification was increased from 40.64%to 88.06%.When the initial mass concentration of Cu2+was 400 mg/L,the adsorption temperature was 25℃,the solution pH value was 7.00 and the adsorption time was 240 min,the adsorption amount of L-g-DMAEA for Cu2+was 70.40 mg/g and the adsorption efficiency was 88.06%.It still had a high adsorption efficiency of 64.70%after 5 cycles.The adsorption kinetics analysis showed that the adsorption of Cu2+by L-g-DMAEA conformed to a quasi-second-order kinetic model,and the adsorption process was a combination of physical adsorption and chemical adsorption,and the chemical adsorption was dominated.
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