Effect of low-molecular-weight organic acids on the distribution of mobilized al between soil solution and solid phase
文献类型：期刊论文
| 作者 | Li, Jiuyu; Xu, Renkou; Tiwari, Diwakar; Ji, Guoliang |
| 刊名 | Applied geochemistry
 |
| 出版日期 | 2006-10-01 |
| 卷号 | 21期号:10页码:1750-1759 |
| ISSN号 | 0883-2927 |
| DOI | 10.1016/j.apgeochem.2006.06.013 |
| 通讯作者 | Xu, renkou(rkxu@issas.ac.cn) |
| 英文摘要 | Low-molecular-weight (lmw) organic acids occur widely in soils. results in pure mineral systems and podzols suggest that lmw organic acids can promote the dissolution of al from kaolinite, al oxides and soils, but limited information is available concerning the role of these organic acids on al mobilization in variable charge soils as yet. this paper deals with the effect of lmw organic acids on al mobilization and mobilized al distributed between the solution phase and exchangeable sites in two acidic variable charge soils. the results indicated that lmw organic acids accelerated al mobilization through proton- and ligand- promoted reactions. the ability of different organic acids to mobilize al followed the order: citric acid > oxalic acid > malonic acid > malic acid > tartaric acid > salicylic acid > lactic acid > maleic acid. this order was in general agreement with the magnitude of the stability constants of al-organic acid complexes. the ratio of soluble al to exchangeable al also increased as the stability constants increased. these results showed that the organic acids with strong al-complexation capacity were most effective in al mobilization, whereas the weak organic acids promoted the retention of mobilized al by the soil exchangeable sites. increase in both organic acid concentration and solution ph promoted al mobilization and also increased the ratio of soluble al to exchangeable al due to the increase in the concentration of the effective organic ligands, especially in the strong organic acid systems. these findings may have their practical significance for establishing more effective amelioration procedures for variable charge soils with increased acidity and higher mobility of al. (c) 2006 elsevier ltd. all rights reserved. |
| WOS关键词 | VARIABLE CHARGE SOILS ; DISSOLUTION KINETICS ; ALUMINUM SPECIATION ; FOREST SOILS ; COORDINATION CHEMISTRY ; KAOLINITE DISSOLUTION ; METAL DISSOLUTION ; MINERAL SURFACES ; CARBOXYLIC-ACIDS ; ANIONS |
| WOS研究方向 | Geochemistry & Geophysics |
| WOS类目 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000241641000011 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2379484 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Xu, Renkou |
| 作者单位 | 1.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China 3.Natl Inst Technol, Dept Chem, Jamshedpur 831014, Bihar, India |
| 推荐引用方式 GB/T 7714 | Li, Jiuyu,Xu, Renkou,Tiwari, Diwakar,et al. Effect of low-molecular-weight organic acids on the distribution of mobilized al between soil solution and solid phase[J]. Applied geochemistry,2006,21(10):1750-1759. |
| APA | Li, Jiuyu,Xu, Renkou,Tiwari, Diwakar,&Ji, Guoliang.(2006).Effect of low-molecular-weight organic acids on the distribution of mobilized al between soil solution and solid phase.Applied geochemistry,21(10),1750-1759. |
| MLA | Li, Jiuyu,et al."Effect of low-molecular-weight organic acids on the distribution of mobilized al between soil solution and solid phase".Applied geochemistry 21.10(2006):1750-1759. |
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来源：中国科学院大学
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