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研究了纳米磁性壳聚糖吸附剂对腐殖酸的吸附性能和重复使用性能,分析了腐殖酸存在的条件下对Cu2+、Pb2+、Cd2+三种重金属离子吸附的影响及机理.实验结果表明:该吸附剂对腐殖酸吸附的最佳pH值为11,饱和吸附量为292mg/g;吸附速度快,15min可达吸附平衡;经5次吸附后,保留了初次吸附量的60%,具有一定的可再生性和重复使用性.同时,该吸附剂吸附腐殖酸后仍可对Cu2+、Pb2+、Cd2+产生吸附作用,较单独吸附时Cu2+、Pb2+的吸附量有所降低,而Cd2+的吸附量则有大幅提高.
The adsorption properties and reusable properties of humic acid were studied. The effects of humic acid on the adsorption of Cu2 +, Pb2 + and Cd2 + were studied. The experimental results show that: The optimum pH value of the adsorbent for humic acid adsorption was 11 and the saturated adsorption capacity was 292 mg / g. The adsorption speed was fast and adsorption equilibrium was reached after 15 min. After the adsorption for 5 times, the initial adsorption capacity was 60% A certain degree of reproducibility and reusability.At the same time, the adsorbent can still adsorb Cu2 +, Pb2 + and Cd2 + after adsorbing humic acid, and the adsorption amount of Cu2 + and Pb2 + There is a substantial increase in volume.