TY - JOUR
T1 - Use of waste marble powder for the synthesis of novel calcium-rich biochar
T2 - Characterization and application for phosphorus recovery in continuous stirring tank reactors
AU - Jellali, Salah
AU - Khiari, Besma
AU - Al-Balushi, Maram
AU - Al-Sabahi, Jamal
AU - Hamdi, Helmi
AU - Bengharez, Zohra
AU - Al-Abri, Mohammed
AU - Al-Nadabi, Hamed
AU - Jeguirim, Mejdi
N1 - Copyright © 2023 Elsevier Ltd. All rights reserved.
PY - 2024/2/1
Y1 - 2024/2/1
N2 - This study investigates—for the first time—the synthesis of a novel Ca-rich biochar (N–Ca–B) and its potential use for phosphorus (P) recovery from both synthetic solutions (SS) and treated urban wastewater (TUW) in a continuous stirring tank reactor (CSTR) mode. The novel biochar was synthesized by pyrolysis at 900 °C of a mixture composed of three different materials: animal biomass (poultry manure; PM), lignocellulosic waste (date palm fronds; DPFs), and abundant mineral waste (waste marble powder; WMP). Characterization of N–Ca–B showed that it has good textural properties: well-developed porosity, and high specific surface area. Furthermore, high calcium hydroxide (Ca(OH)2) and calcium oxides (CaO) nanoparticle loads were observed on the biochar surface. The dynamic CSTR assays indicated that the P recovery efficiency mainly depended on the biochar mass, P influent concentration, and, especially, the Ca content of the feeding solution. Owing to its richness in Ca cations, TUW exhibited the highest adsorbed P amount (109.2 mg g−1), i.e., about 14% larger than the SS. P recovery occurs through precipitation as hydroxyapatite, surface complexation, and electrostatic interactions with positively charged biochar particles. In real-world scenarios, CSTR systems can be applied as a tertiary treatment step in existing wastewater treatment plants (WWTPs). Decanted P-loaded biochar can be used in agriculture as a slow-release fertilizer instead of commercial products.
AB - This study investigates—for the first time—the synthesis of a novel Ca-rich biochar (N–Ca–B) and its potential use for phosphorus (P) recovery from both synthetic solutions (SS) and treated urban wastewater (TUW) in a continuous stirring tank reactor (CSTR) mode. The novel biochar was synthesized by pyrolysis at 900 °C of a mixture composed of three different materials: animal biomass (poultry manure; PM), lignocellulosic waste (date palm fronds; DPFs), and abundant mineral waste (waste marble powder; WMP). Characterization of N–Ca–B showed that it has good textural properties: well-developed porosity, and high specific surface area. Furthermore, high calcium hydroxide (Ca(OH)2) and calcium oxides (CaO) nanoparticle loads were observed on the biochar surface. The dynamic CSTR assays indicated that the P recovery efficiency mainly depended on the biochar mass, P influent concentration, and, especially, the Ca content of the feeding solution. Owing to its richness in Ca cations, TUW exhibited the highest adsorbed P amount (109.2 mg g−1), i.e., about 14% larger than the SS. P recovery occurs through precipitation as hydroxyapatite, surface complexation, and electrostatic interactions with positively charged biochar particles. In real-world scenarios, CSTR systems can be applied as a tertiary treatment step in existing wastewater treatment plants (WWTPs). Decanted P-loaded biochar can be used in agriculture as a slow-release fertilizer instead of commercial products.
KW - Calcium-rich biochar
KW - CSTR
KW - Nutrients
KW - Precipitation
KW - Recovery
KW - Powders
KW - Animals
KW - Calcium
KW - Calcium Carbonate
KW - Phosphorus
KW - Wastewater
KW - Charcoal
UR - http://www.scopus.com/inward/record.url?scp=85181733447&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85181733447&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/2642829b-4bbe-3f97-a0de-0711b44ec70a/
U2 - 10.1016/j.jenvman.2023.119926
DO - 10.1016/j.jenvman.2023.119926
M3 - Article
C2 - 38154226
AN - SCOPUS:85181733447
SN - 0301-4797
VL - 351
JO - Journal of Environmental Management
JF - Journal of Environmental Management
M1 - 119926
ER -