| Presence of bacteria reduced phosphate adsorption on goethite | |
| Hong, Z. N.1; Li, J. Y.1; Jiang, J.1; Liu, Z. D.1,2; Xu, R. K.1 | |
| 刊名 | European journal of soil science
 |
| 2015-05-01 | |
| 卷号 | 66期号:3页码:406-416 |
| ISSN号 | 1351-0754 |
| DOI | 10.1111/ejss.12247 |
| 通讯作者 | Xu, r. k.(rkxu@issas.ac.cn) |
| 英文摘要 | Despite extensive studies, the information obtained from pure iron and aluminum (hydr)oxides cannot fully explain phosphate fixation in natural soils because of the ubiquitous interactions between (hydr)oxides and bacteria in soil. the effect of bacteria (bacillus subtilis subsp. and pseudomonas fluorescens) on phosphate adsorption on goethite (-feooh) was systematically examined under varying reaction times, phosphate concentrations, ph, ionic strength and bacteria dosage. batch experiments in all cases showed significantly less adsorption on bacteria-goethite complexes than on pure goethite, demonstrating an inhibitory effect of bacteria. the inhibition of phosphate adsorption increased with bacterial loading, and showed a significant, non-linear correlation with the decrease in the goethite positive charge induced by the bacteria. moreover, in both the desorption experiment and in situ, the attenuated total reflectance fourier-transform infrared (atr-ftir) spectra suggested a competition of bacteria surface groups (phosphate and carboxyl) with solution phosphate for hydroxyl on goethite. therefore, the negative influences of bacteria on phosphate adsorption on goethite were probably caused by the surface charge modification and the competitive adsorption induced by the bacteria. under most conditions, the effects of b. subtilis subsp. were conspicuous, while only slight influences were found for p. fluorescens. this difference between the two bacteria species was explained by differences in their surface charge, group content and chemical interaction with goethite. these findings uncover an important role of bacteria in phosphate phyto-availability and mobility in natural environments. |
| WOS关键词 | ATR-FTIR SPECTROSCOPY ; EXTRACELLULAR POLYMERIC SUBSTANCES ; BACILLUS-SUBTILIS ; SHEWANELLA-PUTREFACIENS ; PSEUDOMONAS-PUTIDA ; ESCHERICHIA-COLI ; CLAY-MINERALS ; IRON-OXIDE ; ADHESION ; SURFACE |
| WOS研究方向 | Agriculture |
| WOS类目 | Soil Science |
| 语种 | 英语 |
| 出版者 | WILEY-BLACKWELL |
| WOS记录号 | WOS:000355004000003 |
| 内容类型 | 期刊论文 |
| URI标识 | http://www.corc.org.cn/handle/1471x/2376525 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Xu, R. K. |
| 作者单位 | 1.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Jiangsu, Peoples R China 2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Hong, Z. N.,Li, J. Y.,Jiang, J.,et al. Presence of bacteria reduced phosphate adsorption on goethite[J]. European journal of soil science,2015,66(3):406-416. |
| APA | Hong, Z. N.,Li, J. Y.,Jiang, J.,Liu, Z. D.,&Xu, R. K..(2015).Presence of bacteria reduced phosphate adsorption on goethite.European journal of soil science,66(3),406-416. |
| MLA | Hong, Z. N.,et al."Presence of bacteria reduced phosphate adsorption on goethite".European journal of soil science 66.3(2015):406-416. |
| 个性服务 |
| 查看访问统计 |
| 相关权益政策 |
| 暂无数据 |
| 收藏/分享 |
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。
修改评论