2020
DOI: 10.1016/j.jclepro.2019.118853
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Use of Mg/Ca modified biochars to take up phosphorus from acid-extract of incinerated sewage sludge ash (ISSA) for fertilizer application

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Cited by 107 publications
(32 citation statements)
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“…The kinetic study showed that the biochar-based fertilizer acted as a slow-release fertilizer, releasing 10% of its total P content in the first hour, whereas the triple superphosphate released up to 90%. Fang et al (2019) produced Mg/Ca modified biochar by the pyrolysis (450, 700, and 800 C) of peanut shell and sugarcane bagasse pre-treated with MgCl 2 and CaCl 2 solutions. The results indicated that Mg-modified sugarcane bagasse biochar, pyrolyzed at 700 C, showed a rapid P absorption due to its positively charged surface, high specific surface area (1440 m 2 /g), and porous structure.…”
Section: Pre-treatment Methodsmentioning
confidence: 99%
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“…The kinetic study showed that the biochar-based fertilizer acted as a slow-release fertilizer, releasing 10% of its total P content in the first hour, whereas the triple superphosphate released up to 90%. Fang et al (2019) produced Mg/Ca modified biochar by the pyrolysis (450, 700, and 800 C) of peanut shell and sugarcane bagasse pre-treated with MgCl 2 and CaCl 2 solutions. The results indicated that Mg-modified sugarcane bagasse biochar, pyrolyzed at 700 C, showed a rapid P absorption due to its positively charged surface, high specific surface area (1440 m 2 /g), and porous structure.…”
Section: Pre-treatment Methodsmentioning
confidence: 99%
“…(2021) Dry wheat straw 400 °C Pre Urea, bentonite clay, rock phosphate, Fe 2 O 3 and FeSO 4 .7H 2 O Increase in soil Eh (potential difference) Increase the Eh between the rhizosphere and the root membrane Increase of plant growth and microbial population Chew et al. (2020) Wastes of peanut shell and sugarcane bagasse 450–800 °C Pre MgCl 2 and CaCl 2 Increase P adsorption Increase in plant nutrients and reduced metal (loid)s. Fang et al. (2019) Pelletized Poultry manure 300 °C Pre 5% triple superphosphate Reduced Fe, Zn, Cu and Mn in soils.…”
Section: Production Of Nutrient-enriched Biochar-based Fertilizermentioning
confidence: 99%
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“…Three kinds of RPFs are produced from Hong Kong ISSA by different methods, and their detailed production process can be found in the supplementary information (Text S1) (Fang et al, 2019;Fang et al, 2018a;Wang et al, 2018). In short, BP was obtained by adsorption of P from acid extraction of ISSA by Mg-dosed sugarcane biochar (700°C for 1 hour with MgCl 2 amendment).…”
Section: Characteristics Of Rpfsmentioning
confidence: 99%
“…2018), while SP had the highest purity, with a crystalline phase that was only struvite (Mg(NH 4 )(PO 4 )•6H 2 O)(Wang et al, 2018). BP had the most complex crystalline phases, which included Al-P (AlPO 4 •10H 2 O), Mg-P (MgHPO 4 ), and Ca-P (Ca 15 (PO 4 ) 2 (SiO 4 ) 6 )(Fang et al, 2019). The microstructure of these RPFs is shown in Fig.2.…”
mentioning
confidence: 99%