Specific Adsorption of Trace Amounts of Calcium and Strontium by Hydrous Oxides of Iron and Aluminum1

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	Specific Adsorption of Trace Amounts of Calcium and Strontium by Hydrous Oxides of Iron and Aluminum1
	D. G. Kinniburgh ; J. K. Syers and M. L. Jackson
发表期刊	Soil Science Society of America Journal
ISSN	0361-599
	1974
卷号	39 期号:3 页码:464-470
英文摘要	Freshly prepared Fe and Al hydrous oxide gels and the amorphous product of heating gibbsite selectively adsorbed traces of Ca and Sr from solutions containing a large excess (∼1M) of NaNO3. The fraction of the added Ca (Sr) adsorbed depended principally on the suspension pH, the amount of solid present, and to a lesser extent on the NaNO3 concentration. Significant Ca and Sr adsorption occurred on the Fe and Al gels, and heated gibbsite, at pH values below the points of zero charge (8.1, 9.4, and 8.3±0.1, respectively), indicating specific adsorption. The pH (± 0.10) at which 50% of the Ca was adsorbed (pH50) occurred at pH 7.15 for the Fe gel (0.093M Fe), 8.35 for the Al gel (0.093M Al), and 6.70 for the heated gibbsite (0.181M Al); for Sr, the pH50 values were 7.10, 9.00, and 6.45, respectively. For the Fe gel and heated gibbsite, an empirical model based on the law of mass action described the pH dependence of adsorption reasonably well and suggested that for each Ca or Sr fraction adsorbed, approximately one proton was released. Failure of the Al gel to fit this model may have resulted from its rapid aging.
文献类型	期刊论文
条目标识符	http://ir.yic.ac.cn/handle/133337/3197
专题	科研共享资源
推荐引用方式 GB/T 7714	D. G. Kinniburgh,J. K. Syers and M. L. Jackson. Specific Adsorption of Trace Amounts of Calcium and Strontium by Hydrous Oxides of Iron and Aluminum1[J]. Soil Science Society of America Journal,1974,39(3):464-470.
APA	D. G. Kinniburgh,&J. K. Syers and M. L. Jackson.(1974).Specific Adsorption of Trace Amounts of Calcium and Strontium by Hydrous Oxides of Iron and Aluminum1.Soil Science Society of America Journal,39(3),464-470.
MLA	D. G. Kinniburgh,et al."Specific Adsorption of Trace Amounts of Calcium and Strontium by Hydrous Oxides of Iron and Aluminum1".Soil Science Society of America Journal 39.3(1974):464-470.

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