2022
DOI: 10.55713/jmmm.v32i1.1243
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Synthesis and phosphate adsorption performance of elephant dung biochar modified with magnesium and iron

Abstract: The large production volume combined with the high lignocellulose content makes elephant dung an attractive and underutilized biomass resource, but also presents waste management problems for elephant orphanages. This study explored the conversion of elephant dung into biochars by slow pyrolysis at 500°C for the recovery of phosphate. The unmodified biochar (BC500) had a specific surface area (SBET) of 62.5 m2×g-1 with point of zero charge (pHPZC) of 7.7. Biochar modification with MgCl2 (MgBC500) and FeCl3 (Fe… Show more

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Cited by 7 publications
(12 citation statements)
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“…The P concentrations were measured by UV-vis spectroscopy (Agilent 8453, Agilent Technologies, USA) via the molybdenum blue method at 880 nm. 25 …”
Section: Methodsmentioning
confidence: 99%
See 1 more Smart Citation
“…The P concentrations were measured by UV-vis spectroscopy (Agilent 8453, Agilent Technologies, USA) via the molybdenum blue method at 880 nm. 25 …”
Section: Methodsmentioning
confidence: 99%
“…The P concentrations were measured by UVvis spectroscopy (Agilent 8453, Agilent Technologies, USA) via the molybdenum blue method at 880 nm. 25 The extractable P of the biochars was evaluated in DI water and 2% formic acid according to the modied method of Wang et al 26 The suspensions (0.3 g biochar in 30 mL extractant) were ultrasonicated for 10 min and placed on an orbital shaker (Gallenkamp, UK) at 120 rpm. Aer 30 min, the suspensions were ltered through a 0.22 mm nylon lter and the extracted P concentrations were measured by UV-vis spectroscopy via the molybdenum blue method.…”
Section: Characterization Of Biocharsmentioning
confidence: 99%
“…The conversion of coconut shells into biochar is an environmentally beneficial method that promotes sustainable waste management and valorization. Biochar is well-known as bio-charcoal produced by pyrolysis of organic biomass in the absence of oxygen or under low oxygen conditions [9][10][11]. Slow pyrolysis conducted at low temperatures (300℃ to 550°C) and for a prolonged time (>60 min) can be used efficiently to convert agriculture wastes to high yields of biochar and low yields of bio-oil and gaseous by-products [12,13].…”
Section: Introductionmentioning
confidence: 99%
“…In Thailand, 3,500 domestic elephants (Elephas maximus) reside in elephant camps (Vitithumakhun et al 2018), excreting about 60% of their daily food intake (Stępień et al 2019;Sandhage-Hofmann et al 2021;Abeysinghe et al 2022) which amounts to 360 tons of wet dung each day. The issue of disposing of elephant dung has been addressed by proprietors through careless piling or burying near natural water sources (Mainkaew, Pattiya & Jansri 2023) posing a risk of water pollution and the release of unpleasant odors and hazardous gases (Abeysinghe et al 2022;Mathews & Thadathil 2011). Elephant dung (ED) contains a considerable number of undigested fibers, such as 35-47% cellulose, 28-30% hemicellulose, and 15-18% lignin (Abeysinghe et al 2022).…”
Section: Introductionmentioning
confidence: 99%
“…The issue of disposing of elephant dung has been addressed by proprietors through careless piling or burying near natural water sources (Mainkaew, Pattiya & Jansri 2023) posing a risk of water pollution and the release of unpleasant odors and hazardous gases (Abeysinghe et al 2022;Mathews & Thadathil 2011). Elephant dung (ED) contains a considerable number of undigested fibers, such as 35-47% cellulose, 28-30% hemicellulose, and 15-18% lignin (Abeysinghe et al 2022). As a result of this high fiber content, a significant portion of ED takes a long time to decompose naturally, with a rate of 6.4×10 -2 kg/day (Vanleeuwe & Probert 2014).…”
Section: Introductionmentioning
confidence: 99%