研究时间、初始pH值、芫荽用量和溶液初始浓度等因素对芫荽吸附重金属Pb(Ⅱ)的影响.结果表明芫荽对Pb(Ⅱ)的吸附是一个快速吸附过程,吸附达到平衡的时间约为20 min,且初始吸附速率随温度上升而增加.随着初始pH值在一定范围内增加,Pb(Ⅱ)的吸附量从0.51 mg/g迅速增加至7.21 mg/g,去除率由2.02 %增加至28.84 %;其次芫荽添加量增加,Pb(Ⅱ)吸附量由20.00 mg/g降为6.13 mg/g,去除率则由20.00 %升高至73.52 %;随着Pb(Ⅱ)溶液的初始浓度的增加,芫荽对其去除率由83.00 %下降到50.46 %;而吸附量则由4.15 mg/g增大至22.71 mg/g;动力学模型和吸附热力学研究表明:芫荽Pb(Ⅱ)吸附等温曲线属于Langmuir模型,且利用准二级动力学模型可较好描述其吸附动力学的过程.%The paper was studied that effect of adsorption time,the influence of pH value,adsorbent additive amount,initial concentration of heavy metals in waste water on coriander adsorption. The overall adsorption processes was fast for Pb(Ⅱ),and adsorption equilibrium time was 20 min,and with the increasing of tempera-ture,initial adsorption rate increased. With the increase of the initial pH value within a scale,adsorption capac-ity was increased from 0.51 mg/g to 7.21 mg/g,and meanwhile removal rate was raised from 2.02 % to 28.84 %. The coriander of Pb (II) removal rate raised from 20.00 % to 73.52 %,and the adsorption quantity decreased from 20.00 mg/g to 6.13 mg/g by adding the amount of coriander. The coriander of Pb (II) removal rate was re-duced from 83.00 % to 50.46 %,and the adsorption quantity was added from 4.15 mg/g to 22.71 mg/g by increas-ing the initial concentration. The results of kinetic models and adsorption thermodynamic showed that the ad-sorption of Pb(Ⅱ) by coriander all went with the Langmuir isotherm as well as pseudo second order model.
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