摘要
通过对吸附时间、电气石用量、初始溶液pH值、初始离子浓度和吸附温度等单因素试验,研究超细电气石粉对水中重金属离子Cu(Ⅱ)、Pb(Ⅱ)和Zn(Ⅱ)的吸附性能。实验发现:超细电气石粉对3种重金属离子的吸附均符合Langmuir吸附等温模型。超细电气石粉对Cu(Ⅱ)、Pb(Ⅱ)和Zn(Ⅱ)的饱和吸附量分别是18.59、133.33 mg/g和15.41 mg/g。超细电气石粉对重金属离子的吸附量随着溶液的初始pH值和电气石用量的增加而增加,随着重金属离子浓度的增加而减小。超细电气石粉能够提高金属溶液的pH值。温度对超细电气石粉吸附重金属离子的影响较小。超细电气石粉对混合溶液中的Cu(Ⅱ)、Pb(Ⅱ)和Zn(Ⅱ)的吸附属于竞争性吸附,其选择性吸附由大到小的顺序为:Pb(Ⅱ),Cu(Ⅱ),Zn(Ⅱ)。
The adsorption characteristics of heavy metal ions, Cu（II）, Pb（II ） and Zn（II） ions onto ultra-fine powder of tourmaline （UPT） from aqueous solution were investigated with respect to the effects of contact duration, adsorbent dosage, pH and temperature of solution. The adsorption behaviors of the metal ions followed the Langrnuir isotherm model. The maximum adsorption to heavy metal ions, Cu（ II ）, Pb（ II ） and Zn（ II ） by UPT was 18.59, 133.33 and 15.41 mg/g, respectively. The adsorption of metal ions by the UPT increased with increasing pH and adsorbent dose, but decreased with increasing initial dissolved metal concentration. The UPT could also increase the pH value of metal solution. The temperature had a slight effect on the adsorption capacity of UPT. The competitive adsorption by UPT to the three ions was observed in blended solution with Cu（ II ）, Pb（ II ） and Zn（ II ）, and the adsorption capacity of UPT for multi-metal ions system was in a descending order of Pb（II ）, Cu（ II ）, Zn（ II ）.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2011年第10期1585-1591,共7页
Journal of The Chinese Ceramic Society
基金
浙江省国内科技合作与成果引进转化项目(2007d70SA450004)
