数字农科院2.0

Mechanism of Potassium Release from Feldspar by Mechanical Activation in Presence of Additives at Ordinary Temperatures

文献类型： 外文期刊

作者： Zhang X.;He Z.;Jia W.;Meng F.;Zhang W.;Lu C.;Hao X.;Gai G.;Huang Z.;Xu M.;Wang K.;Yun S.

作者机构：

关键词： available potassium;mechanochemical activation;potassium availability;potassium feldspar powder;water soluble potassium

期刊名称： Materials

ISSN： 1996-1944

年卷期： 2024 年 17 卷 1 期

页码：

收录情况： SCIE（2024版） ; ; EI（2024版）

摘要： To improve the potassium availability of feldspar at ordinary temperatures, the mechanical grinding and addition of sodium hydroxide/salts were employed to study the effects of mechanical activation and strong alkali addition on particle characteristics, water-soluble potassium, and the available potassium of feldspar. A laser particle size analyzer was utilized for the direct determination of particle size distribution (PSD) using ground samples. The Brunauer–Emmett–Teller (BET) method was employed for specific surface areas. X-ray diffraction (XRD) was employed for structural characterization, scanning electron microscopy (SEM) for morphology exploration, and energy dispersive spectroscopy (EDS) to determine the chemical composition of potassium feldspar powder. The results revealed that the mechanical activation of potassium feldspar could reduce the particle size and produce agglomerated nanoparticles in the later period. The addition of NaOH and sodium salt did not cause agglomeration, and NaOH dissolved the nanoparticles. The water-soluble potassium content of feldspar in each treatment increased during mechanical grinding, from 21.64 mg kg−1 to 1495.81 mg·kg−1, by adding NaOH 5% weight of potassium feldspar powder and to 3044.08 mg·kg−1 by adding NaOH 10% weight with effects different from those of mechanical shaking. By comparison, only 162.93 mg·kg−1 water-soluble potassium was obtained by adding NaOH 5% weight. The dissolved potassium in the former case was significantly higher than in the latter, and the addition of NaOH and sodium salts significantly enhanced the water-soluble potassium contents due to ion exchange. Furthermore, the addition of sodium hydroxide improved the water-soluble potassium due to its mechanochemical action on potassium feldspar. The mechanical energy changed the crystal structure of potassium feldspar, explaining the increase in available potassium. The addition of sodium salts did not promote change in the feldspar’s structure, thereby did not raise the available potassium content. The reason for this was related to the mechanochemical action on sodium hydroxide and feldspar, which could promote the dissolution of fine particles, thereby incrementing the available potassium. © 2023 by the authors.

分类号：

  • 相关文献

[1]Impact of active root zone soil potassium levels on cotton yield and fiber quality under no tillage. Jingjing Shao,Aizhong Liu,Helin Dong,Pengcheng Li,Miao Sun,Weina Feng,Feichao Huo,Cangsong Zheng. 2024

作者其他论文 更多>>