Biochar/struvite composite as a novel potential material for slow release of N and P

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

11 Scopus Citations
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Author(s)

  • Pan Hu
  • Yihe Zhang
  • Leipeng Liu
  • Xinke Wang
  • Xinglong Luan
  • Xi Ma
  • Jichao Zhou
  • Pengda Zhao

Detail(s)

Original languageEnglish
Pages (from-to)17152–17162
Number of pages11
Journal / PublicationEnvironmental Science and Pollution Research
Volume26
Issue number17
Online published18 Apr 2019
Publication statusPublished - Jun 2019

Abstract

For soil and environmental remediation, biochar/struvite composites are prepared by the crystallization-adsorption method. The recovery rates of N, P, and Mg in the solution increase to 99.02%, 97.23%, and 95.22%, respectively, by forming 10% biochar/struvite composite. X-ray diffraction (XRD) patterns acquired from the 10% biochar/struvite composite show a crystalline structure of MgNH4PO4·6H2O (PDF no. 15-0762) and release of the main nutrient elements (N, P, Mg) from the 10% biochar/struvite composite increases significantly compared to struvite. The solubility of the biochar/struvite composite is the highest in 0.5 mol/L HCl, second in 20 g/L citric acid, and lowest in water. The power function equation describes more precisely the cumulative release of N, P, and Mg from the biochar/struvite composite in distilled water, whereas it follows the simple Elovich equation in 20 g/L critic acid and first-order kinetics equation in 0.5 mol/L HCl. Leaching experiments are performed on the biochar/struvite composite in soil, and the results indicate that the biochar/struvite composite has a longer cycle of release of nutrients than traditional chemical fertilizers and has large potential as a slow-release fertilizer.

Research Area(s)

  • Biochar/struvite composite, Functionalized biochar, Mineral fertilizer, Slow release

Citation Format(s)

Biochar/struvite composite as a novel potential material for slow release of N and P. / Hu, Pan; Zhang, Yihe; Liu, Leipeng; Wang, Xinke; Luan, Xinglong; Ma, Xi; Chu, Paul K.; Zhou, Jichao; Zhao, Pengda.

In: Environmental Science and Pollution Research , Vol. 26, No. 17, 06.2019, p. 17152–17162.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review