Journal
BIORESOURCE TECHNOLOGY
Volume 215, Issue -, Pages 209-214Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2016.02.125
Keywords
Phosphate; Adsorption; MgO-impregnation; Magnetic biochar; Fertilizer
Funding
- United States, USDA-NRCS [69-3A75-10-156]
- China, Chinese Universities Scientific Fund [2014YB064]
Ask authors/readers for more resources
The present study deals with the preparation of a novel MgO-impregnated magnetic biochar (MMSB) for phosphate recovery from aqueous solution. The MMSB was evaluated against sugarcane harvest residue biochar (SB) and magnetic biochar without Mg (MSB). The results showed that increasing Mg content in MMSB greatly improved the phosphate adsorption compared to SB and MSB, with 20% Mg-impregnated MMSB (20MMSB) recovering more than 99.5% phosphate from aqueous solution. Phosphate adsorption capacity of 20MMSB was 121.25 mg P/g at pH 4 and only 37.53% of recovered phosphate was desorbed by 0.01 mol/L HCl solutions. XRD and FTIR analysis showed that phosphate sorption mechanisms involved predominately with surface electrostatic attraction and precipitation with impregnated MgO and surface inner-sphere complexation with Fe oxide. The 20MMSB exhibited both maximum phosphate sorption and strong magnetic separation ability. Overall, phosphate-loaded 20MMSB significantly enhanced plant growth and could be used as a potential substitute for phosphate-based fertilizer. (C) 2016 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available