Assessing the performance of clinoptilolite for controlling and releasing ammonium in agricultural applications

Energy Reports

Daocai Chi¹  Yidi Sun²  Yanzhi Wang³  Qi Wu³  Hongyang Chen³ 

[1] Corresponding author.;College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou, Jiangsu, 225009, PR China;College of Water Resource, Shenyang Agricultural University, Shenyang, Liaoning, 110866, PR China;

关键词: Clinoptilolite;    Langmuir adsorption equation;    Endothermic reaction;    Ion competition;    Agricultural applications;   

DOI  :  

来源: DOAJ

【 摘 要 】

To develop soil holding capacity of NH4+and reduce the energy consumption of industrial fertilizer production, different dosages of clinoptilolite mixed with soil were used to absorb NH4+, which was also simulated using Freundlich and Langmuir equation under different conditions. The results showed that NH4+adsorption of clinoptilolite-amended soil changed from multilayer adsorption to single-layer adsorption with the increase in clinoptilolite application rates. The optimal ratio of clinoptilolite applied to the soil for high adsorption efficiency was 0.01g 10g−1. The co-existence of Na+and K+increased the NH4+adsorption capacity of clinoptilolite-amended soil relative to the existence of single Na+. This showed that K+was less competitive towards NH4+than Na+. Decreasing water quantity, which increased the total soil adsorption capacity by a factor of 2 to 3, had the most significant effect and helped regulate the release of nitrogen in clinoptilolite-amended soil. In sum, clinoptilolite can enhance soil nitrogen holding capacity, which shows great potentials to reduce the energy consumption of industrial urea production.

【 授权许可】

Unknown