亲水性悬臂键连3-氨基吡啶螯合树脂对水中Hg^(2+)的去除研究

REMOVAL OF Hg^(2+) IN WATER SOLUTION BY CHELATING RESIN CONTAINING HYDROPHILIC SPACER AND 3-AMIONO PYRIDINE

以亲水性悬臂键连3-氨基吡啶的聚苯乙烯型螯合树脂(PS-DEG-3AP)为吸附剂,通过柱试验方法系统研究了柱分离参数对Hg2+的回收率的影响。结果表明,当树脂用量、进样体积、进样体积流量、解吸液体积流量分别为100 mg、30 mL、1 mL/min、0.5 mL/min时,树脂对水溶液中的Hg2+皆能达到定量回收。过量的碱金属、碱土金属及重金属离子对Hg2+回收率略有影响,回收率均大于90%;树脂重复利用5次后对Hg2+的回收率略有下降。

By using the chelating resin containing hydrophilic spacer and 3-amiono pyridine as adsorbent,removal of Hg2＋ in water solution was investigated through column method.The results showed that： when the amount of resin,sample volume,sample flow rate,elution flow rate were 100 mg,30 mL,1 mL/min,0.5 mL/min respectively,Hg2＋ in water solution could be recovered quantitatively.Excessive amount of alkali metals,alkaline earth metal and heavy metal ions slightly affected the recovery rate of Hg2＋,which was more than 90%.Five consecutive sorption-desorption cycles demonstrated that recovery of Hg2＋ was slightly low.