| 膨润土对钾肥的吸附性能及缓释效果研究 |
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| 引用本文： | 刘爱平,冯启明,王维清,和丽丽.膨润土对钾肥的吸附性能及缓释效果研究[J].非金属矿,2010,33(6). |
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| 作者姓名： | 刘爱平 冯启明 王维清 和丽丽 |
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| 作者单位： | 西南科技大学环境与资源学院,四川,绵阳,621010 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 以KCl为钾源,新疆某地所产膨润土为钾肥的缓释载体制备出了膨润土缓释钾肥,研究了单位质量膨润土对K+的吸附量与膨润土中加入KCl的比例之间的关系及吸速率,得出了K+吸附量最大时的膨润土∶KCl比值。在此基础上,用pH值与大气降雨相似的溶液对饱和吸附了K+的膨润土缓释肥进行解吸,研究其缓释效果。结果表明,膨润土对K+的最大吸附量为21.4mg/g,对K+的吸附速率快,最佳吸附时间为10min左右,将0.5g的膨润土缓释钾肥加入到50mLpH值为5.5的水中进行解吸,膨润土中K+的残留量随解吸时间的延长而缓慢减少,在24h时K+的残留率为43%。
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| 关 键 词： | 膨润土 钾肥 吸附性能 缓释效果 |
Research on Adsorption Property and Slow-releasing Effect of Bentonite to Potash Fertilizer |
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| Liu Aiping,Feng Qiming,Wang Weiqing,He Lili.Research on Adsorption Property and Slow-releasing Effect of Bentonite to Potash Fertilizer[J].Non-metallic Mines,2010,33(6). |
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| Authors: | Liu Aiping Feng Qiming Wang Weiqing He Lili |
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| Affiliation: | Liu Aiping Feng Qiming Wang Weiqing He Lili (College of Environment & Resources,South West University of Science & Technology,Mianyang,Sichuan 621010) |
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| Abstract: | Use KCl as potassium source and bentonite in Xinjiang as slow-release material,bentonite slow-release fertilizer of potassium was prepared.The relation between the unit mass adsorption amount of bentonite for K+ and the adding ratio of KCl to bentonite were studied.Moreover,we studied the adsorption rate and work out the ratio of bentonite to KCl when the adsorption quantity of K+ in bentonite was maximum.Based on this,bentonite slow-release fertilizer of potassium that maximum adsorption quantity of K+ was... |
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| Keywords: | bentonite potash fertilizer adsorption property slow-releasing effect |
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