CNF/活性炭纸基材料对水中余氯去除性能研究

Study on the Removal Performance of CNF/Activated Carbon Paper-based Materials for Residual Chlorine in Water

关键词:  纤维素纳米纤丝  活性炭留着率  余氯去除率  抗张指数

Key Words:cellulose nanofibril  activated carbon retention rate  removal rate towards residual chlorine  tensile index

摘要:本研究以针叶木浆、活性炭粉末和聚酯纤维为原料，添加纤维素纳米纤丝（CNF），制备了一种高性能、绿色可降解、用于去除水中余氯的CNF/活性炭纸基材料（CNF/ACPBM）。探讨了CNF添加量对CNF/ACPBM的活性炭留着率、物理性能、结构特性及余氯去除性能的影响。当CNF添加量为2.0%时，CNF/ACPBM的活性炭留着率、干湿抗张指数达到最大值，分别为98.23%、10.9 N·m/g和1.31 N·m/g，相较于未添加CNF的活性炭纸基材料分别提高了7.0%、53.5%和27.2%。当CNF添加量1.2%，温度30℃，吸附时间30 min，余氯初始浓度4 mg/L时，0.5 g CNF/ACPBM对余氯去除率高达93.72%，去除效果显著。

Abstract:A high-performance， green and degradable CNF/activated carbon paper-based material （CNF/ACPBM） was prepared using softwood pulp， activated carbon powder and polyester fiber as raw materials with adding cellulose nanofibril （CNF） to remove residual chlorine of water. The effects of addition amounts of CNF on activated carbon retention rate， physical performance， structural properties and removal rate towards residual chlorine of CNF/ACPBM were discussed in this study. When the addition amount of CNF was 2.0%， the activated carbon retention rate， wet and dry tensile index of CNF/ACPBM reached maximum value of 98.23%， 10.9 N·m/g and 1.31 N·m/g， respectively. Compared with the activated carbon paper-based material without CNF， it was increased by 7.0%， 53.5% and 27.2%， respectively.When the addition amount of CNF was 1.2%， the temperature was 30℃， the adsorption time was 30 min， and the initial concentration of residual chlorine was 4 mg/L， the removal rate of 0.5 g CNF/ACPBM towards residual chlorine was 93.72%， indicating the material had a significant effect on the removal of residual chlorine.