摘要
用2g·L^(-1)二甲酚橙水溶液处理201×7阴离子交换树脂,制取得到二甲酚橙浸渍树脂。经过最佳条件选择,在同一水样中可以同时进行吸附、洗脱铅和镉。结果表明：二甲酚橙浸渍树脂在pH值为3～7时,对Pb^(2+)、Cd^(2+)具有较好的吸附性能。温度低有利于铅的吸附,而温度高则有利于镉的吸附。二甲酚橙树脂对Pb^(2+)和Cd^(2+)的平衡时吸附容量分别达到95和85mg·g^(-1)树脂,达到最大吸附容量平衡时仅需要50min。50mL 0．1mol·L^(-1)HCl就可以同时将铅、镉同时洗脱完全。二甲酚橙浸渍树脂吸附Pb^(2+)、Cd^(2+),具有交换速度快、易于洗脱、富集倍数大、选择性好等优点。
The anion- exchange resin type 201 × 7 was impregnated with the reagent xylenol orange,With the choice of optimum condition, the lead and cadmium can be enriched and eluted at the same time in the same water sample. The results indicated that the optimum pH value for adsorption is found between 3 - 7. The low temperiture was propitious for absortion of lead, and high temperiture was propitious for abortion of cadmium. The adsorption capacity of Pb^2 ＋ and Cd^2＋ at balance is 95mg·g^-1 and 85mg· g^-1 resin respectively. The time needed to reach the maximum adsorption balance is 50 minutes. Pb and Cd can be eluted completely with only 50mL 0. 1mol·L^-1 HCl. XO resin could enrich and separate lead and cadmium with some advantages, such as the quick exchanging speed, eluting and enriching easily, and good selectivity.
出处
《化学工程师》
CAS
2006年第9期8-10,共3页
Chemical Engineer
基金
江苏省滩涂生物资源与环境保护重点建设实验室(JLCBE 05030)
关键词
二甲酚橙树脂
方波溶出伏安法
铅
镉
xylenol orange resin
absorption performance
lead
cadmium
