以单宁酸为吸附剂,采用紫外光谱法分析了单宁酸对溶液中铬离子、铜离子和铁离子的吸附效果.结果表明:在0.2 mg/mL的10 mL铬离子标准溶液中加入1 mL 0.000 1 mg/mL的单宁酸,调节溶液pH为1时,静置90 min后单宁酸对铬离子吸附效果最佳,吸附率为58.18％;在0.1 mg/mL的10 mL硫酸铜溶液中加入1 mL 0.002 mg/mL的单宁酸,调节溶液pH为4时,静置60 min后单宁酸对铜离子吸附效果最佳,吸附率为23.42％;在0.000 5 mol/L的20 mL三氯化铁溶液中加入1 mL 0.5 mg/mL的单宁酸,调节溶液pH为4时,静置60 min后,单宁酸对铁离子吸附效果最佳,吸附率为97.79％.该研究为便捷、高效、低成本地除去废水中重金属离子提供参考与借鉴.
Study on the Adsorption of Tannic Acid on Heavy Metal Ions
In this paper,tannic acid is used as adsorbent to study the adsorption effect of tannic acid on chromium ion,copper ion and iron ion in solution by ultraviolet-visible spectrophotometry(UV-Vis).The results show that when 1 mL of 0.000 1 mg/mL tannic acid is added to the 10 mL of 0.2 mg/mL chromium solution at pH 1 standing for 90 min,the best adsorption effect of tannic acid on chromium ion is gained,and the adsorption rate is 58.18％.When 1 mL of 0.002 mg/mL tannic acid is added to 10 mL of 0.1 mg/mL copper solution at pH 4 for 60 min,the best adsorption effect of tannic acid on copper ion is gained,and the adsorption rate is 23.42％.When 1 mL of 0.5 mg/mL tannic acid is added to 20 mL of 0.000 5 mol/L ferric solution at pH 4 standing for 60 min,the best adsorption effect of tannic acid on iron ion is gained,and the adsorption rate is 97.79％.This study can provide reference for removing heavy metal ions in wastewater conveniently,efficiently and at low cost.
NETL
NSTL
万方数据
维普
