以γ-胺丙基三甲氧基硅烷(APS)修饰经季铵盐活化的坡缕石,研究了改性坡缕石对Cu(Ⅱ)的吸附行为.实验结果表明:经有机修饰的坡缕石吸附铜(Ⅱ)能力高于坡缕石原土,在温度为288 K,吸附剂用量20 mg,震荡时间为40 min,pH =5.5时,最大吸附量可达45.69 mg/g.此外,Cu(Ⅱ)在有机化坡缕石的吸附机理符合二级动力学,热力学参数说明,该吸附属自发进行,吸附热和熵变分别为36.19 kJ/mol和130.78 mol·K,吸附自由能随温度的升高而增加.
参考文献
| [1] | Mehmet Emin Argun;Sukru Dursun;Celalettin Ozdemir;Mustafa Karatas .Heavy metal adsorption by modified oak sawdust: Thermodynamics and kinetics[J].Journal of hazardous materials,2007(1):77-85. |
| [2] | J.H. Potgieter;S.S. Potgieter-Vermaak;P.D. Kalibantonga .Heavy metals removal from solution by palygorskite clay[J].Minerals Engineering,2006(5):463-470. |
| [3] | Chen H;Wang AQ .Kinetic and isothermal studies of lead ion adsorption onto palygorskite clay[J].Journal of Colloid and Interface Science,2007(2):309-316. |
| [4] | Calace N;Muro A D;Nardi E et al.Adsorption isotherms for describing heavy-metal retention in paper mill sludge[J].Industrial and Engineering Chemistry Research,2002,41(22):5491-5497. |
| [5] | 王茹,廖学品,侯旭,石碧.胶原纤维固化杨梅单宁对Pb2+、Cd2+、Hg2+的吸附[J].林产化学与工业,2005(01):10-14. |
| [6] | 李玲,贾锦霞,甄卫军,李振江,庞桂林.有机化膨润土对水中金属离子的吸附及其表征[J].矿物学报,2006(03):285-290. |
| [7] | R.Naseem;S.S.Tahir .Removal of Pb(II) from aqueous/acidic solutions by using bentionite as an adsorbent[J].Water research: A journal of the international water association,2001(16):3982-3986. |
| [8] | G. E. Marquez;M. J. P. Ribeiro;J. M. Ventura;J. A. Labrincha .Removal of nickel from aqueous solutions by clay-based beds[J].Ceramics International,2004(1):111-119. |
| [9] | E. Alvarez-Ayuso;A. Garcia-Sanchez .Removal of cadmium from aqueous solutions by palygorskite[J].Journal of hazardous materials,2007(1/2):594-600. |
| [10] | Stephanie Goubert-Renaudin;Raphael Schneider;Alain Walcarius .Synthesis of new dithiocarbamate-based organosilanes for grafting on silica[J].Tetrahedron letters: The International Journal for the Rapid Publication of Preliminary Communications in Organic Chemistry,2007(12):2113-2116. |
| [11] | 常玥,柳宏伟,吕学谦,任小宁,陈虎魁,查飞,郝亚东.蒙脱土/聚丙烯硫脲复合材料对铬（VI）吸附行为[J].硅酸盐通报,2010(05):1226-1230,1245. |
| [12] | Namasivayam C;Yamuna R T .Adsorption of chromium (Ⅵ) by a low-cost adsorbent:biogas residual slurry[J].Chemosphere,1995,30(03):561-578. |
| [13] | Ho Y S;John Wase D A;Forster C F .Batch nickel removal from aqueous solution by sphagnum moss peat[J].Water Research,1995,29(05):1327-1332. |
| [14] | P. Baskaralingam;M. Pulikesi;D. Elango;V. Ramamurthi;S. Sivanesan .Adsorption of acid dye onto organobentonite[J].Journal of hazardous materials,2006(2/3):138-144. |
| [15] | Eric Guibal;Celine Milot;John Michael Tobin .Metal-Anion Sorption by Chitosan Beads: Equilibrium and Kinetic Studies[J].Industrial & Engineering Chemistry Research,1998(4):1454-1463. |
| [16] | Ghosh D;Bhattacharyya K G .Adsorption of methylene blue on kaolinite[J].Applied Clay Science,2002,20(06):295-300. |
| [17] | Khan S A;Riaz-ur-Rehman;Khan M A .Adsorption of chromium (Ⅲ),chromium (Ⅵ) and silver (Ⅰ) on bentonite[J].Waste Management,1995,15(04):271-282. |
| [18] | E.I. Unuabonah;K.O. Adebowale;B.I. Olu-Owolabi .Kinetic and thermodynamic studies of the adsorption of lead (Ⅱ) ions onto phosphate-modified kaolinite clay[J].Journal of hazardous materials,2007(1/2):386-395. |
| [19] | Z. Aksu .Determination of the equilibrium, kinetic and thermodynamic parameters of the batch biosorption of nickel(Ⅱ) ions onto Chlorella vulgaris[J].Process biochemistry,2002(1):89-99. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%