Magnesium-modified biochar was used to adsorb phosphorus from wastewater and used as a phosphorus source to be recycled to reduce the ammonia nitrogen of piggery digestive wastewater

He, Lintong; Wang, Dehan; Wu, Z.; Lv, Yongzhen; Li, Sicheng

doi:10.1016/j.jclepro.2022.132130

Cited by 20 publications

(8 citation statements)

References 49 publications

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“…However, when this biochar was combined with sludge from the supply water treatment plant, the adsorption capacity of ammonium raised significantly to 37.30, 37.92, 35.43, 40.41 mgNH4 + -N/g, respectively, and those for phosphate to 47.13, 42.76, 47.90, and 42.68 mgPO4 3--P/g, respectively. It might be explained by the presence of aromatic groups or metallic elements in the sludge that helped in promoting the active sites and surface areas of the biochar responsible for adsorbing ammonium and phosphate [10,27,29,37]. This observation was consistent with the results of Kończak and Huber [31] who found that sewage sludge ash and willow had the highest ammonium adsorption capacity of about 36.6 mg/g.…”

Section: Preliminary Test and Materials Characterizationsupporting

confidence: 85%

“…MgO or CaO were used for nutrient recovery because of their alkaline characteristics and because they were environmentally friendly metals, but the metal oxides lacked adsorption ability for dissolved organic substances. Besides, biochar might not adsorb phosphate and anions so the combination of metal oxides such as MgO and biochar should be investigated [21,25,27].…”

Section: Introductionmentioning

confidence: 99%

“…Santhosh et al [29] used two types of biomass, wooden chip and sewage sludge separate, as magnetic biochar to investigate the differences between modified and unmodified biochar with Fe2O3 for the removal of Cr(VI), and acid orange 7 dye. Additionally, some other related examples of application of biomass were MgCl2-P. australis biochar [30,31], sewage sludge ash and willow [31], MgCl2-rice straw [21], Mg-phosphorus rich biochar [27], MgCl2-corn stalk [32], Mg-biochar/bentonite composite bead [33], and Mg/Ce-wheat corn straw [34]. These studies gave an idea for combining both crop residues (low nutrient and ash) and alum sludge (low carbon and surface area, high aromatic hydrocarbon and metal) [31] from a water treatment plant as an adsorbent for the recovery of N and P from poultry wastewater.…”

Section: Introductionmentioning

confidence: 99%

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Nutrient Recovery from Poultry Wastewater by Modified Biochar: An Optimization Study

Thành

Hang

Thuy

et al. 2023

Curr. Appl. Sci. Technol.

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In this work, we proposed and tested a method for utilizing agricultural waste and alum sludge as an effective adsorbent to treat poultry wastewater. The product was also targeted to be used as fertilizer for agriculture. Modified biochar was produced from crop residues, sludge from a water treatment plant, and magnesium salt. The produced biochar was characterized by scanning electron microscopy, energy-dispersive X-ray spectroscopy, Brunauer-Emmett-Teller analysis, and X-ray diffraction. The adsorption of ammonia and phosphate in both synthetic and actual poultry wastewater by the produced biochar was conducted. The effect of experimental conditions such as N to P ratio, initial concentrations of ammonium and phosphate, pH, and the amount of biochar on the adsorption capacity for ammonia and phosphate were also investigated. The results from the experiment showed that the best adsorption capacities were 60.64 mgNH4+-N/g and 66.24 mgPO43--P/g, which were produced at the optimum conditions of N to P ratio of 1.25, initial concentration of 90 mg/L, pH 6, and biochar mass of 0.105 g. These results create an opportunity for the effective production of slow-release fertilizer from crop residues and alum sludge for ecological agriculture in the future.

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Section: Preliminary Test and Materials Characterizationsupporting

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Nutrient Recovery from Poultry Wastewater by Modified Biochar: An Optimization Study

Thành

Hang

Thuy

et al. 2023

Curr. Appl. Sci. Technol.

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“…Further, with an increase in initial phosphate concentration, the removal efficiency drops (Figure S2). This trend can be ascribed to the occupation of surface‐active sites by the increased adsorbate concentration [43] . Agitation speed could also affect the external mass transfer resistance and hence the influence of agitation speed was investigated at different rotations per minute.…”

Section: Resultsmentioning

confidence: 99%

“…This trend can be ascribed to the occupation of surface-active sites by the increased adsorbate concentration. [43] Agitation speed could also affect the external mass transfer resistance and hence the influence of agitation speed was investigated at different rotations per minute. As seen in Figure S3, the removal efficiency increased from 24.6 % to 99.03 % when the agitation speed increased from 20 to 100 rpm.…”

Section: Effect Of Operational Parametersmentioning

confidence: 99%

Hydrothermal Synthesis of Mg modified Nanobiochar from Spent Coffee Grounds for Effective Phosphate Removal: Kinetic and Isotherm Studies

Begna Sisaya,

Leul Mekonnen

2023

ChemistrySelect

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Phosphate removal/recovery is essential to maintain the quality of aquatic systems and ensure sustainable use of phosphorous. Herein Mg‐nano biochar (Mg/NBC) is prepared as an effective phosphate adsorbent through the valorization of spent coffee grounds into nanobiochar by hydrothermal acid digestion of its biochar resulting from a slow pyrolysis. Characterization of the adsorbent was done by SEM, FTIR, BET, and XRD. Mg/NBC showed a 12.84 % higher adsorption capacity than the unmodified nanobiochar. Adsorption studies confirmed that phosphate adsorption on Mg/NBC is favored in acidic conditions removing 95 % of the initial concentrations at pH 1. The Langmuir adsorption isotherm model is better fitted to the equilibrium data with a maximum adsorption capacity of 100 mg/g suggesting uniform monolayer adsorption. Phosphate adsorption on Mg/NBC was initially rapid and followed a pseudo‐second‐order kinetic with an equilibrium constant (K2) of 0.029 g/mg.min. Thermodynamic investigation at different temperatures revealed negative ΔG°, positive ΔH° and ΔS° values suggesting a spontaneous endothermic process involving the chemisorption of phosphate at the later stage of the adsorption. Further, the application of the prepared adsorbent in real wastewater resulted in 90 % phosphate removal suggesting the promising potential of the prepared adsorbent for practical use in phosphate removal/recovery.

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Hierarchical Porous Biochar Prepared from Peanut Shell Through Minerals Modification for Highly Efficient Tetracycline Removal

Liu,

Fan

2023

Water Air Soil Pollut

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Magnesium-modified biochar was used to adsorb phosphorus from wastewater and used as a phosphorus source to be recycled to reduce the ammonia nitrogen of piggery digestive wastewater

Cited by 20 publications

References 49 publications

Nutrient Recovery from Poultry Wastewater by Modified Biochar: An Optimization Study

Nutrient Recovery from Poultry Wastewater by Modified Biochar: An Optimization Study

Hydrothermal Synthesis of Mg modified Nanobiochar from Spent Coffee Grounds for Effective Phosphate Removal: Kinetic and Isotherm Studies

Hierarchical Porous Biochar Prepared from Peanut Shell Through Minerals Modification for Highly Efficient Tetracycline Removal

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