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Selection of optimum formulation for biosorbing lead and cadmium from aquatic solution by using PVA-SA's immobilizing Lentinus edodes residue
Zhang, Dan(张丹); Zeng, Xuedan; Li, Wei; He, Haijiang; Ma, Pei; Falandysz, Jerzy
Corresponding AuthorZhang, D (张丹)
2011-07
Source PublicationDESALINATION AND WATER TREATMENT
ISSN1944-3994
Volume31Pages:107–114
AbstractThis 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.
KeywordPva-sa Immobilization Lentinus Edodes Residue Thermodynamics
Indexed BySCI
Language英语
WOS IDWOS:000295919200013
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/5500
Collection山地表生过程与生态调控重点实验室
Recommended Citation
GB/T 7714
Zhang, Dan,Zeng, Xuedan,Li, Wei,et al. 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,Zeng, Xuedan,Li, Wei,He, Haijiang,Ma, Pei,&Falandysz, Jerzy.(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,et al."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.
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