摘要
采用固定化WAS吸附剂,净化Pb(Ⅱ)和Hg(Ⅱ)污染水体影响,结果表明:该吸附剂吸附2种重金属离子时呈现出不同的规律,吸附Pb(Ⅱ)的最佳条件为在25℃,200 mL,质量浓度为99.23 mg/L,pH值为5,WAS与固化剂的包埋比例(质量比)为1∶5,振荡吸附1 h,最大吸附率为71.00%,吸附量为14.20 mg/g;吸附Hg(Ⅱ)的最佳条件为在25℃,质量浓度为99.87 mg/L,pH值为4,WAS与固化剂的包埋比例(质量比)为1∶5,振荡吸附1 h后,最大吸附率为60.60%,吸附量为12.12 mg/g。在所实验的质量浓度范围内,基本符合经典Langmuir等温吸附模型,固定化WAS吸附Pb(Ⅱ)和Hg(Ⅱ)的表观最大吸附量分别为88.50 mg/g和66.67 mg/g,为固定化WAS吸附剂净化Pb(Ⅱ)和Hg(Ⅱ)污染水体应用研究提供可靠依据。
The result of the experiment to purify Pb（ Ⅱ） and Hg（ Ⅱ） polluted water by immobilized WAS sorbent, shows dif- ferent rule when the immobilized WAS sorbent adsorpted are two kinds of heavy metal ion. The best condition for the adsorp-tion of Pb（ Ⅱ ） is 25 ℃, the polluted liquor is 200 mL, concentration is 99.23 mg/L, pH=5, entrapment quantity 1 ： 5, sha- king and adsorpting for lh, the best adsorption rate is 71.00%, adsorption quantity is 14.20 mg/g. The best condition for the adsorption of Hg（ Ⅱ ） is 25 ℃, concentration is 99.87 mg/L, pH=4, entrapment quantity 1 ： 5, shaking and adsorpting for 1 h, the best adsorption rate is 60.60%, adsorption quantity is 12.12 mg/g. Basically it fits Langmuir model for experimental concentration. The best apparent adsorption quantity of immobilized WAS is 88.50 mg · g ^-1 and 66.67 mg · g^-1. It provided dependable base for next step of study on immobilized silt sorbent adsorpting Pb（ Ⅱ ） and Hg（ Ⅱ）
出处
《河北科技大学学报》
CAS
北大核心
2010年第2期181-186,共6页
Journal of Hebei University of Science and Technology
基金
国家自然科学基金资助项目(40872154)
南京交通职业技术学院青年科研基金资助项目(JQ0902)
