中国农业科学院农业信息研究所 中国农学会
Agricultural Information Institute of CAAS China Association of Agricultural Science Societies
En
Ch
中国农业科学院农业信息研究所 中国农学会 主办

AI检索

订阅

返回顶部
当前位置: 首页 > 文章 > Effects of Common Ions on Zn Sorption in Some Calcareous Soils of Western Iran 土壤圈(英文版) 2012,22 (2)
Position: Home > Articles > Effects of Common Ions on Zn Sorption in Some Calcareous Soils of Western Iran Pedosphere 2012,22 (2)

Effects of Common Ions on Zn Sorption in Some Calcareous Soils of Western Iran

作  者：
Mohsen Jalali;Najmeh Ahmadi Mohammad Zinl
单  位：
Department of Soil Science, College of Agriculture, Bu-Ali Sina University, Hamedan (Iran;Department of Soil Science, College of Agriculture, Bu-Ali Sina University, Hamedan (Iran)
关键词：
zn;no3;background electrolytes;sorption;h2po4;decrease
摘  要：
Zinc (Zn) is essential to plant growth and relatively mobile in soils. This study was conducted to assess the effect of common ions (Ca, K+, Na+, NH4+, Cl-, NO3-, and H2PO4-) on sorption of Zn in surface samples of ten calcareous soils from western Iran using 10 mmol L-1 KCl, KNO3, KH2PO4, Ca(NO3)(2), NaNO3, and NH4NO3 solutions as background electrolytes. The results indicated that both NH4+, K+, and Ca2+ equally decreased Zn sorption as compared to Na+. Zinc sorption was decreased by H2PO4-, as compared to NO3- and Cl-. The Langmuir and Freundlich equations fitted closely to the sorption data of all ions. The Langmuir maximum, bonding energy constant, and Freundlich distribution coefficient for Zn sorption differed among the various ionic background electrolytes. Langmuir sorption parameters showed that the presence of H2PO4-, decreased the maximum Zn adsorbed, but increased the bonding energy. Although K+ and NH4+ equally influenced maximum Zn adsorbed, they differed in their effect on the distribution coefficient of Zn in soils. Values of saturation index calculated using Visual MINTEQ indicated that at the low Zn concentration, Zn solubility was controlled by sorption reactions and at the high Zn concentration, it was mainly controlled by sorption and mineral precipitation reactions, such as precipitation of Zn-3(PO4)(2)center dot 4H(2)O, Zn-5(OH)(6)(CO3)(2), and ZnCO3. For most ionic background electrolytes, soil pH, CaCO3, and cation exchange capacity (CEC) were significantly correlated with sorption parameters.

相似文章

导出引用
计量
文章访问数: 20
HTML全文浏览量: 0
PDF下载量: 0

所属期刊

推荐期刊

友情链接Friendly link
农业信息研究所Agricultural information institute 农业智能知识服务平台Agricultural intelligent knowledge service platform 农业学术服务平台Agricultural Knowledge Service System 中国知网CNKI 维普网VIP 万方WANFANG DATA
联系我们Contact us

电话Tell：010-82109652-808

邮箱E-mail：agrijournal@caas.cn

服务Service
关于我们About us 意见建议Opinions and suggest
版权说明Copyright
单位：中国农业科学院农业信息研究所 中国农学会 © 2017中国农业科学院农业信息研究所 ICP备案号：京ICP备09089781号-46