• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>土壤圈（英文版） >Exchange Reaction Between Selenite and Hydroxyl Ion of Variable Charge Soil Surfaces:I.Electrolyte Species and pH Effects
【24h】

Exchange Reaction Between Selenite and Hydroxyl Ion of Variable Charge Soil Surfaces:I.Electrolyte Species and pH Effects

机译：可变电荷土壤表面亚硒酸盐与羟离子的交换反应：I。电解质种类和pH值影响

获取原文
获取原文并翻译 | 示例
       
页面导航
  • 摘要
  • 著录项
  • 相关主题

摘要

Hydroxyl release of red soil and latosol surfaces was quantitatively measured using a self-made constantpH automated titration instrument, to study the changes of hydroxyl release with different added seleniteamounts and pH levels, and to study the effects of electrolytes on hydroxyl release. Hydroxyl release increasedwith the selenite concentration, with a rapid increase at a low selenite concentration while slowing down ata high concentration. The pH where maximum of hydroxyl release appeared was not constant, shifting toa lower valus with increasing selenite concentration. Hydroxyl release decreased with increasing electrolyteconcentration, and the decrease was very rapid at a low electrolyte concentration but slow at a high electrolyteconcentration. For NaC1O4, NaC1 and Na2SO4, hydroxyl release was in the order of NaClO4 ＞ NaCl >Na2SO4, and the difference was very significant. But for NaCl, KCl and CaCl2, the order of hydroxyl releasewas NaCl ＞ KCl ＞ CaCl2, and the difference was smaller. The amount of hydroxyl release from Xuwenlatosol was greater than that from Jinxian red soil. Hydroxyl release existed in a wider range of pH withXuwen latosol than with Jinxian red soil, due to their difference in soil properties. However, both soils hadsimilar curves of hydroxyl release, indicating the common characteristics of variable charge soils.
机译：使用自制的恒定pH自动滴定仪对红壤和latosol表面的羟基释放进行定量测量，以研究不同硒含量和pH水平下羟基释放的变化，并研究电解质对羟基释放的影响。羟基释放随亚硒酸盐浓度的增加而增加，在低亚硒酸盐浓度下迅速增加，而高浓度则减慢。出现最大程度的羟基释放的pH值不是恒定的，随着亚硒酸盐浓度的增加而移至较低的值。羟基释放随着电解质浓度的增加而降低，并且在电解质浓度低时降低非常快，而在电解质浓度高时降低很慢。对于NaCl，NaCl和Na2SO4，羟基释放的顺序为NaClO4＞ NaCl> Na2SO4，且差异非常显着。但是对于NaCl，KCl和CaCl2，羟基释放的顺序为NaCl＞ KCl＞ CaCl2，且差异较小。徐闻拉托溶胶释放的羟基量大于金县红壤释放的羟基量。许闻Latosol的pH释放范围比晋县红壤的羟基释放范围更大，这是因为它们的土壤性质不同。但是，两种土壤都有相似的羟基释放曲线，表明了可变电荷土壤的共同特征。

著录项

获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号