Evaluation of Jordanian zeolite tuff as a controlled slow-release fertilizer for NH4+

被引：51

作者：

Dwairi, IM ^{[1
]}

机构：

[1] Yarmouk Univ, Dept Earth & Environm Sci, Irbid, Jordan

来源：

ENVIRONMENTAL GEOLOGY | 1998年 / 34卷 / 01期

关键词：

zeolite; NH4+-phillipsite tuff; exchange properties; slow release; soluble; NH4-fertilizers;

D O I：

10.1007/s002540050251

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The exchange and release properties of the natural phillipsite tuff from the Aritain area in Jordan were evaluated by studying the exchange properties of this natural zeolite in the NH4+-NA(+) system. Exchange isotherms at 18, 35, and 50 degrees C showed that phillipsite exchanged NH4+ preferably over Na+ at all temperatures. However, the selectivity coefficient for NH4+ decreased with decreasing temperature. The release of NH4+ from phillipsite saturated with ammonium sulfate took place in two stages characterized by different SO42-:NH4+ ratios. Aritain phillipsite from NE Jordan could be processed and used as NH4+ slow-release fertilizers. The use of NH4+-phillipsite tuff offers an option to the widely used soluble NH4-fertilizers in agciculture to avoid environmental problems associated with nitrogen contamination of surface water and groundwater.

引用

页码：1 / 4

页数：4

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