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[1]马培,张丹,李伟,等.固定香菇废弃菌柄对二元溶液中镉的吸附研究[J].应用与环境生物学报,2010,16(01):114-117.[doi:10.3724/SP.J.1145.2010.00114]
 MA Pei,ZHANG Dan,LI Wei,et al.Effect of competitive interference on the biosorption of Cd(Ⅱ) by immobilized Lentinus edodes Residue[J].Chinese Journal of Applied & Environmental Biology,2010,16(01):114-117.[doi:10.3724/SP.J.1145.2010.00114]
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固定香菇废弃菌柄对二元溶液中镉的吸附研究()
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
16卷
期数:
2010年01期
页码:
114-117
栏目:
研究论文
出版日期:
2010-02-25

文章信息/Info

Title:
Effect of competitive interference on the biosorption of Cd(Ⅱ) by immobilized Lentinus edodes Residue
作者:
马培 张丹 李伟 何海江 余东
(1中国科学院水利部成都山地灾害与环境研究所,山地环境演变与调控重点实验室 成都 610041)
(2中国科学院研究生院 北京 100049)
Author(s):
MA Pei ZHANG Dan LI Wei HE Haijiang YU Dong
(1Key Laboratory of Mountain Environment Diversity & Control, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences and Ministry of Water Conservancy, Chengdu 610041, China)
(2Graduate University of Chinese Academy of Sciences, Beijing 100049, China)
关键词:
香菇菌柄废弃物固定干扰吸附Cd2+聚乙烯醇–海藻酸钠等温吸附
Keywords:
immobilized Lentinus edodes interferential biosorption Cd2+ PVA-SA isotherm
分类号:
X703
DOI:
10.3724/SP.J.1145.2010.00114
文献标志码:
A
摘要:
利用聚乙烯醇–海藻酸钠(PVA-SA)固定香菇(Lentinus edodes)菌柄废弃物作为生物吸附剂吸附溶液中的Cd2+,吸附过滤后的溶液用原子吸收光谱仪(AAS)测定Cd2+的浓度. 结果表明,一元溶液中固定香菇菌柄废弃物吸附Cd2+适宜的pH值范围为4~7,比自由态香菇粉的(pH 5~7)广;二元溶液中随着pH值的增加,Cd2+的吸附率有线性增加的趋势;当固定Cd2+浓度为10 mg g-1,变化干扰离子Cu2+或Pb2+(0~30 mg g-1)时,吸附剂对Cd2+的吸附明显降低;分别用Langmuir、Freundlich、Dubinin-Radushkevich(D-R)和Langmuir-Freundlich等温吸附模型对一元和二元溶液中Cd2+的等温吸附过程进行拟合,结果表明,Langmuir吸附模型能较好地拟合一元溶液和Cd2+-Pb2+二元溶液中Cd2+的等温吸附过程,相关系数R2分别为0.998 1和0.929 1. D-R模型能较好地拟合Cd2+-Cu2+二元溶液中Cd2+的等温吸附过程,相关系数R2为0.962 3. 图1 表7 参11
Abstract:
Immobilized Lentinus edodes residue with polyvinyl alcohol-Na-alginate (PVA-SA) was studied for removing Cd2+ in solution, and the concentration of Cd2+ in solution after the removing was then tested by atomic absorption spectrophotometer (AAS). The results indicated that suitable pH range for Cd2+ biosorption from single-metal solution was 4~7, which was wider than that by free L. edodes powder (pH 5~7). Differing from the single-metal solution, the biosorption rate of Cd2+ in binary-metal solution was linearly increased as pH increased. When the concentration of Cd2+ was fixed at 10 mg g-1 and the concentration of interferential metal Cu2+ or Pb2+ varied from 0 to 30 mg g-1, the biosorption of Cd2+ was decreased significantly. The isotherm models including Langmuir, Freundlich, Dubinin-Radushkevich (D-R) and Langmuir-Freundlich were applied to fit experiment data. It was found that the Langmuir model could best fit isotherm biosorption of Cd2+ in Cd2+ single-metal and in Cd2+/Pb2+ binary-metal solution with correlation coefficient R2 of 0.998 1 and 0.929 1 respectively, while the D-R model would well fit that of Cd2+ in Cd2+/Cu2+ binary solution with correlation coefficient R2 of 0.962 3. Fig 1, Tab 7, Ref 11

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备注/Memo

备注/Memo:
国家自然科学基金项目(No.40871111)和四川省科技攻关项目(No. 04SG023-006-05)资助
更新日期/Last Update: 2010-02-09