Selection of optimum formulation for biosorbing lead and cadmium from aquatic solution by using PVA-SA's immobilizing Lentinus edodes residue
文献类型：期刊论文
| 作者 | Zhang, Dan（张丹）
|
| 刊名 | DESALINATION AND WATER TREATMENT
 |
| 出版日期 | 2011-07 |
| 卷号 | 31页码:107–114 |
| 关键词 | PVA-SA Immobilization Lentinus edodes residue Thermodynamics |
| ISSN号 | 1944-3994 |
| 通讯作者 | Zhang, D (张丹） |
| 英文摘要 | This study focused on macrofungi Lentinus edodes residue immobilized by polyvinyl alcohol (PVA)-Na-alginate (SA) for lead (Pb) and cadmium (Cd) adsorption. Based on the ability of absorbing Pb2+ and Cd2+ from aqueous solution, the mechanical strength and balling property, an orthogonal experiment was done to confirm the optimum formulation of PVA-SA's immobilizing L. edodes. The optimum immobilization formulation for absorbing Pb2+ was 8% (m/V) PVA + 1% SA + 3% L. edodes + 2% CaCl2 in saturated H3BO3 solution with adsorption rate of 95.4%, while that for absorbing Cd2+ was 5% PVA + 1% SA + 3% L. edodes + 2% CaCl2 in saturated H3BO3 with adsorption rate of 63.7%. The Langmuir isotherm model best described free L. edodes for Pb2+ adsorption with R-2 of 0.9939. Freundlich isotherm model best described free L. edodes for Cd2+ adsorption with R-2 of 0.9993 and best described Pb2+ and Cd2+ adsorption by immobilized L. edodes with R-2 of 0.9587 and 0.9823 respectively. The adsorption for Pb2+ and Cd2+ by L. edodes reached equilibrium within 1 h with equilibrium quantity (q(e)) of 0.8440 mg Pb2+/g and 1.8120 mg Cd2+/g respectively, while that by immobilized L. edodes reached equilibrium within 3 h and 7 h separately with q(e) of 0.4925 mg Pb2+/g and 0.2008 mg Cd2+/g respectively. The pseudo-second-order model fit well Cd2+ and Pb2+ adsorption kinetics by free L. edodes and immobilized L. edodes. The rate constant k(2) of the pseudo-second-order model was 1.2531 for Cd2+ adsorption and was 1.3241 for Pb2+ by free L. edodes, and that was 0.7805 for Pb2+ and 0.2310 for Cd2+ by immobilized L. edodes respectively. The theoretic maximum adsorption quantity (q(m)) of of 6.4475 mg/g for Cd2+ by immobilized L. edodes was higher than q(m) of 2.8321 mg/g for Cd2+ by free L. edodes calculated from the Langmuir model and the k value of 3.0401 by immobilized L. edodes calcuated from the Freundlich model for Pb2+ adsorption was higher than the k value of 0.7704 for Cd2+ adsorption by free L. edodes indicated that after immobilization treatment, the capacity of L. edodes for Pb2+ and Cd2+ adsorption increased, and the adsorption ability for Pb2+ was stronger than Cd2+ by immobilized L. edodes. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000295919200013 |
| 公开日期 | 2013-06-25 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/5500]  |
| 专题 | 成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室 |
| 推荐引用方式 GB/T 7714 | Zhang, Dan. Selection of optimum formulation for biosorbing lead and cadmium from aquatic solution by using PVA-SA's immobilizing Lentinus edodes residue[J]. DESALINATION AND WATER TREATMENT,2011,31:107–114. |
| APA | Zhang, Dan.(2011).Selection of optimum formulation for biosorbing lead and cadmium from aquatic solution by using PVA-SA's immobilizing Lentinus edodes residue.DESALINATION AND WATER TREATMENT,31,107–114. |
| MLA | Zhang, Dan."Selection of optimum formulation for biosorbing lead and cadmium from aquatic solution by using PVA-SA's immobilizing Lentinus edodes residue".DESALINATION AND WATER TREATMENT 31(2011):107–114. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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