固定香菇菌柄废弃物对二元溶液中Cd(Ⅱ)的竞争性吸附
文献类型：期刊论文
| 作者 | 张丹
|
| 刊名 | 应用与环境生物学报
 |
| 出版日期 | 2010 |
| 卷号 | 16期号:1页码:114-117 |
| 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 |
| 其他题名 | Effect of Competitive Interference on Biosorption of Cd(Ⅱ) by Immobilized Lentinus edodes Residue |
| 通讯作者 | 张丹 |
| 中文摘要 | 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(pH5～7)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10mgg-1,变化干扰离子Cu2+或Pb2+(0～30mgg-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0.9981和0.9291.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0.9623. |
| 英文摘要 | 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. |
| 学科主题 | 微生物学 |
| 分类号 | X703 |
| 资助信息 | 国家自然科学基金项目(No.40871111);四川省科技攻关项目(No.04SG023-006-05) |
| 语种 | 中文 |
| 公开日期 | 2012-01-17 |
| 源URL | [http://192.168.143.20:8080/handle/131551/3743]  |
| 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 | 张丹. 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(1):114-117. |
| APA | 张丹.(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(1),114-117. |
| MLA | 张丹."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 16.1(2010):114-117. |
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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