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固定香菇菌柄废弃物对二元溶液中Cd(Ⅱ)的竞争性吸附
Alternative TitleEffect of Competitive Interference on Biosorption of Cd(Ⅱ)by Immobilized Lentinus edodes Residue
马培1,2; 张丹1; 李伟1; 何海江1,2; 余东1
2010
Source Publication应用与环境生物学报
ISSN1006-687X
Volume16Issue:3Pages:114-117
SubtypeArticle
Contribution Rank1
Abstract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Cd~(2+),吸附过滤后的溶液用原子吸收光谱仪(AAS)测定Cd~(2+)的浓度.结果表明,一元溶液中固定香菇菌柄废弃物吸附Cd~(2+)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,Cd~(2+)的吸附率有线性增加的趋势;当固定Cd~(2+)浓度为10 mg g~(-1),变化干扰离子Cu~(2+)或Pb~(2+)(0-30 mg g-1)时,吸附剂对Cd~(2+)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Cd~(2+)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Cd~(2+)-Pb~(2+)二元溶液中Cd~(2+)的等温吸附过程,相天系数R~2分别为0.998 1和0.929 1.D-R模型能较好地拟合Cd~(2+)-Cu~(2+)二元溶液中Cd~(2+)的等温吸附过程,相关系数R~2为0.962 3.
Other AbstractImmobilized Lentinus edodes residue with polyvinyl alcohol-Na-alginate(PVA-SA)was studied for removing Cd~(2+) in solution,and the concentration of Cd~(2+) in solution after the removing was then tested by atomic absorption spectrophotometer(AAS).The results indicated that suitable pH range for Cd~(2+) 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 Cd~(2+) in binary-metal solution was linearly increased as pH increased.When the concentration of Cd~(2+) was fixed at 10 mg g~(-1) and the concentration of interferential metal Cu~(2+) or Pb~(2+) varied from 0 to 30 mg g-1,the biosorption of Cd~(2+) 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 Cd~(2+) in Cd~(2+) single-metal and in Cd~(2+)/Pb~(2+) binary-metal solution with correlation coeflicient R~2 of 0.9981 and 0.929 1 respectively,while the D-R model would well fit that of Cd~(2+) in Cd~(2+)/Cu~(2+) binary solution with correlation coefficient R~2 of 0.962 3.
Keyword香菇菌柄废弃物固定 干扰吸附 聚乙烯醇-海藻酸钠 等温吸附
Indexed ByCSCD
Language中文
CSCD IDCSCD:3842545
Citation statistics
Cited Times:4[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/25604
Collection山地表生过程与生态调控重点实验室
Corresponding Author张丹
Affiliation1.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;
2.中国科学院研究生院
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Corresponding Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
马培,张丹,李伟,等. 固定香菇菌柄废弃物对二元溶液中Cd(Ⅱ)的竞争性吸附[J]. 应用与环境生物学报,2010,16(3):114-117.
APA 马培,张丹,李伟,何海江,&余东.(2010).固定香菇菌柄废弃物对二元溶液中Cd(Ⅱ)的竞争性吸附.应用与环境生物学报,16(3),114-117.
MLA 马培,et al."固定香菇菌柄废弃物对二元溶液中Cd(Ⅱ)的竞争性吸附".应用与环境生物学报 16.3(2010):114-117.
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