Comparative study on characteristics and mechanism of phosphate adsorption on Mg/Al modified biochar

Deng, Yu; Li, Min; Zhang, Zhan; Li, Qiao; Jiang, Kele; Tian, Jingjie; Zhang, Ying; Ni, Fuquan

doi:10.1016/j.jece.2021.105079

Cited by 87 publications

(17 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Because biochar's surface charge is dominated by functional groups that are negatively charged weak acids (Bakshi et al, 2022; Wang, Bakshi, et al, 2020; Yang et al, 2021), it repels the negatively charged phosphate anions. Thus, most of the phosphate anion adsorption likely occurs through cationic bridging (Deng et al, 2021). With the biochar modification (i.e., Fe‐BC P in this study), the Fe treatment on the biochar creates nanoparticulate iron oxide (e.g., hydrous ferric oxide) that increases the adsorption affinity of the biochar for P (Bakshi et al, 2021; Zhang et al, 2020).…”

Section: Resultsmentioning

confidence: 99%

Biochar integrated reactive filtration of wastewater for P removal and recovery, micropollutant catalytic oxidation, and negative CO₂e: Process operation and mechanism

Yu,

Baker,

Crump

et al. 2023

Water Environment Research

View full text Add to dashboard Cite

Biochar (BC) use in water treatment is a promising approach that can simultaneously help address societal needs of clean water, food security, and climate change mitigation. However, novel BC water treatment technology approaches require operational testing in field pilot‐scale scenarios to advance their technology readiness assessment. Therefore, the objective of this study is to evaluate the system performance of BC integrated into hydrous ferric oxide reactive filtration (Fe‐BC‐RF) with and without catalytic ozonation (CatOx) process in laboratory and field pilot‐scale scenarios. For this investigation, Fe‐BC‐RF and Fe‐CatOx‐BC‐RF pilot‐scale trials were conducted on synthetic lake water variants and at three municipal water resource recovery facilities (WRRFs) at process flows of 0.05 and 0.6 L/s, respectively. Three native and two iron‐modified BCs were used in these studies. The commercially available reactive filtration process (Fe‐RF without BC) had 96%–98% total phosphorus (TP) removal from 0.075‐ and 0.22‐mg/L TP, as orthophosphate process influent in these trials. With BC integration, phosphorus removal yielded 94%–98% with the same process‐influent conditions. In WRRF field pilot‐scale studies, the Fe‐CatOx‐BC‐RF process removed 84%–99% of influent total phosphorus concentrations that varied from 0.12 to 8.1 mg/L. Nutrient analysis on BC showed that the recovered BC used in the pilot‐scale studies had an increase in TP from its native concentration, with the Fe‐amended BC showing better P recovery at 110% than its unmodified state, which was 16%. Lastly, the field WRRF Fe‐CatOx‐BC‐RF process studies showed successful destructive removals at >90% for more than 20 detected micropollutants, thus addressing a critical human health and environmental water quality concern. The research demonstrated that integration of BC into Fe‐CatOx‐RF for micropollutant removal, disinfection, and nutrient recovery is an encouraging tertiary water treatment technology that can address sustainable phosphorus recycling needs and the potential for carbon‐negative operation.Practitioner Points A pilot‐scale hydrous ferric oxide reactive sand filtration process integrating biochar injection typically yields >90% total phosphorus removal to ultralow levels. Biochar, modified with iron, recovers phosphorus from wastewater, creating a P/N nutrient upcycled soil amendment. Addition of ozone to the process stream enables biochar‐iron‐ozone catalytic oxidation demonstrating typically excellent (>90%) micropollutant destructive removals for the compounds tested. A companion paper to this work explores life cycle assessment (LCA) and techno‐economic analysis (TEA) to explore biochar water treatment integrated reactive filtration impacts, costs, and readiness. Biochar use can aid in long‐term carbon sequestration by reducing the carbon footprint of advanced water treatment in a dose‐dependent manner, including enabling an overall carbon‐negative process.

show abstract

Section: Resultsmentioning

confidence: 99%

Biochar integrated reactive filtration of wastewater for P removal and recovery, micropollutant catalytic oxidation, and negative CO₂e: Process operation and mechanism

Yu,

Baker,

Crump

et al. 2023

Water Environment Research

View full text Add to dashboard Cite

show abstract

“…17,18 According to recent studies, biochar is considered one of the most promising, cutting-edge, and affordable adsorbents for wastewater treatment. [17][18][19][20] It is theoretically possible to produce biochar by hydropyrolysis, vacuum pyrolysis, slow pyrolysis or fast pyrolysis from any carbon-rich material, such as plant residues, agricultural wastes, animal litters, and solid wastes. 17,19 The hydrothermal carbonization method (HTC) has recently a great attention because it is thought to be a very practical, simple, low-energy consumption, and straightforward way to transform different kinds of natural raw biomass into biochar.…”

Section: Introductionmentioning

confidence: 99%

“…Consequently, the production of chemically modied biochar by intercalation metal cations (i.e., Ca, Al, Mg, Fe) onto biochar matrix may enhance anionic dyes adsorption. 20 For example, biochar modied with AlOOH, 28 Mg doped sugarcane straw biochar, 29 biochar-CuFe-CNC biocomposites 26 and magnetic biochar. Layered double hydroxides, LDHs, have drawn a lot of attention lately for their potential uses in water remediation.…”

Section: Introductionmentioning

confidence: 99%

“…5 High surface area, easy synthesis, and superior ion exchange capacities are the main characteristics of LDHs that make them good choices for water treatment. 5,20 Mg/Al-layered double hydroxide modied water hyacinth biochar has never been utilized to remediate water containing mordant brown 15 (anionic dye) in the literature. Therefore, this manuscript described the synthesis of the novel adsorbent Mg/ Al LDHs-biochar (MgAl@WH) and its application for the removal of mordant brown dye from industrial effluents.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Hydrothermal synthesis of Mg/Al-layered double hydroxide modified water hyacinth hydrochar for remediation of wastewater containing mordant brown dye

Waly,

El-Wakil,

Abou El-Maaty

et al. 2024

RSC Adv.

View full text Add to dashboard Cite

show abstract

“…Recently, mineral-and waste-based and synthetic adsorbents have been developed for phosphorus adsorption [11][12][13]. However, mineral-based and synthetic adsorbents are limited in treating wastewater with high concentrations of phosphorus generated on a large scale because of their high cost and low treatment efficiency.…”

Section: Introductionmentioning

confidence: 99%

Removal of phosphates using eggshells and calcined eggshells in high phosphate solutions

et al. 2022

View full text Add to dashboard Cite

This study was conducted to evaluate the phosphate sorption properties of eggshell (ES) and calcined ESs (C-ESs) in a high-concentration phosphate solution. The C-ESs yield decreased rapidly at 900 °C, indicating that the CaCO3 constituting the ES was converted to CaO by the high calcination temperature. The optimum calcination temperature for phosphate removal using C-ES was 900 °C. The actual sorption amount of phosphate by ES and C-ES900 was in agreement with the Langmuir isothermal sorption equation, and the maximum sorption capacities derived from this equation were 178.6 and 270.3 mg/g, respectively. The sorption rate of phosphate by ES and C-ES900 was divided into two stages: an initial fast sorption stage, followed by a slow sorption stage. The sorption of phosphate by ES was dominantly influenced by the initial pH and salt concentration, whereas C-ES900 exhibited a constant sorption capacity regardless of environmental changes. The SEM–EDS and XRD results demonstrated that phosphate was successfully adsorbed on the ES and C-SE900 surfaces. In this study, it was found that the sorption of phosphate by ES occurred via ion exchange and precipitation reactions and that the sorption of phosphate by C-ES900 was dominantly affected by precipitation. Above all, C-ES can be applied as an effective adsorbent for removing high concentrations of phosphate under a wide range of environmental conditions.

show abstract

Comparative study on characteristics and mechanism of phosphate adsorption on Mg/Al modified biochar

Cited by 87 publications

References 47 publications

Biochar integrated reactive filtration of wastewater for P removal and recovery, micropollutant catalytic oxidation, and negative CO₂e: Process operation and mechanism

Biochar integrated reactive filtration of wastewater for P removal and recovery, micropollutant catalytic oxidation, and negative CO₂e: Process operation and mechanism

Hydrothermal synthesis of Mg/Al-layered double hydroxide modified water hyacinth hydrochar for remediation of wastewater containing mordant brown dye

Removal of phosphates using eggshells and calcined eggshells in high phosphate solutions

Contact Info

Product

Resources

About

Comparative study on characteristics and mechanism of phosphate adsorption on Mg/Al modified biochar

Cited by 87 publications

References 47 publications

Biochar integrated reactive filtration of wastewater for P removal and recovery, micropollutant catalytic oxidation, and negative CO2e: Process operation and mechanism

Biochar integrated reactive filtration of wastewater for P removal and recovery, micropollutant catalytic oxidation, and negative CO2e: Process operation and mechanism

Hydrothermal synthesis of Mg/Al-layered double hydroxide modified water hyacinth hydrochar for remediation of wastewater containing mordant brown dye

Removal of phosphates using eggshells and calcined eggshells in high phosphate solutions

Contact Info

Product

Resources

About

Biochar integrated reactive filtration of wastewater for P removal and recovery, micropollutant catalytic oxidation, and negative CO₂e: Process operation and mechanism

Biochar integrated reactive filtration of wastewater for P removal and recovery, micropollutant catalytic oxidation, and negative CO₂e: Process operation and mechanism