以粘土为骨料,采用添加造孔剂法制备了多孔陶粒,将其作为吸附材料,研究了陶粒对Cd2+的吸附能力、吸附动力学和吸附机理.结果表明,粘土基多孔陶粒对Cd2+具有良好的吸附能力.固液比较大时,得到的吸附量值较小,且随着固液比的增大,陶粒对Cd2+的吸附效率和吸附速率均下降.吸附动力学模型研究表明,陶粒时CA2+的吸附符合准二级吸附速率方程,颗粒内扩散模型确定吸附过程由2个或多个步骤控制.陶粒中的-OH、C-O基团参与对Cd2+的吸附,形成了CdO新相,说明陶粒对Cd2+的吸附包括化学吸附.
参考文献
| [1] | Hassler;Thord Gustavg .Method for controlling pitch on a paper-making machine[P].US,5626720,1997-05-06. |
| [2] | Wen Xinghua;Tang Hongxiao .Surface complexation model for the heavy metal adsorption on natural sediment[J].Science Technology,1998,32:870. |
| [3] | Hui K S;Chao C Y H;Kot S C .Removal of mixed heavy metalions in wastewater by zeolite 4A and residual products fromrecycled coal fly ash[J].Journal of Hazardous Materials,2005,127B(1-3):89. |
| [4] | Nuri Uenlue;Mustafa Ersoz .Adsorption characteristics of heavy metal ions onto a low cost biopolymeric sorbent from aqueous solutions[J].Journal of hazardous materials,2006(2):272-280. |
| [5] | Chang MY;Juang RS .Adsorption of tannic acid, humic acid, and dyes from water using the composite of chitosan and activated clay[J].Journal of Colloid and Interface Science,2004(1):18-25. |
| [6] | Manassero M;Pasqualini E;Sani D.Potassium sorption isotherms of a natural clayey-silt for pollutant containment[A].Rotterdam:Balkema A Publishers,1998:235. |
| [7] | Archana Agrawal;K.K. Sahu .Kinetic and isotherm studies of cadmium adsorption on manganese nodule residue[J].Journal of hazardous materials,2006(2):915-924. |
| [8] | Saeid Azizian .Kinetic models of sorption:a theoretical analysis[J].Journal of Colloid and Interface Science,2004(1):47-52. |
| [9] | Sun Q;Yan L .The adsorption of basic dyes from aqueous solution on modified peatresin particle[J].Water Research,2003,37:1535. |
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