Mg/Zr modified nanobiochar from spent coffee grounds for phosphate recovery and its application as a phosphorous release fertilizer

Sisay, Gemeda Begna; Atisme, Tsegaye Belege; Workie, Yitayal Admassu; Negie, Zemene Worku; Mekonnen, Menbere Leul

doi:10.1016/j.enmm.2022.100766

Cited by 8 publications

(11 citation statements)

References 46 publications

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“…Since the specific surface area refers to both the total surface pore and external surfaces, the obtained result shows that Mg/NBC is more favorable for the adsorption process. Similar enhancement of specific surface area was also obtained due to metal modification of biochar with MgO [7] and Mg/Zr [27] …”

Section: Resultssupporting

confidence: 70%

“…Similar enhancement of specific surface area was also obtained due to metal modification of biochar with MgO [7] and Mg/Zr. [27] The morphological changes of the prepared adsorbent at different stages of modifications were investigated by SEM. As seen in the SEM image of Mg/NBC, (Figure 1b), increased particle deposition is observed which is due to the attachment of Mg on the NBC through interaction with surface oxygen functional groups.…”

Section: Preparation and Characterization Of Mg/cnbcmentioning

confidence: 99%

“…For instance, Mg‐biochar (14.33 mg/g), [7] calcite‐biochar (10.72 mg/g), [25] and MgO‐biochar (31 mg/g) [26] . Our group recently reported an improved adsorption capacity of 37.9 mg/g using a bimetallic‐modified NBC of an average size of 2 nm [27] . However, from a practical application point of view, fewer modifiers such as monometallic modification of NBC could be attractive.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Resultssupporting

confidence: 70%

Section: Preparation and Characterization Of Mg/cnbcmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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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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“…The cultivation of chickpeas has undergone substantial changes in agronomic practices over time, driven by advancements in scientific knowledge and the need for sustainable and productive farming systems. Conventional practices have been replaced by enhanced varieties , precise planting methods (Thenkabail 2003), and refined nutrient management practices (Begna Sisay et al 2023;S. Dubey, Raghav, and Singh 2017).…”

Section: Introductionmentioning

confidence: 99%

A Bibliometric Analysis of Chickpea Agronomic Practices in the World During 45 Years of Scientific Research

Calia,

Pulvento,

Sellami

et al. 2024

Legume Science

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Chickpea (Cicer arietinum L.) cultivation practices underwent significant transformation in recent decades due to advancements in scientific knowledge and the need for sustainable, productive farming systems. In this study, a bibliometric analysis of scientific publications from 1977 to 2023 on chickpea agronomic practices was conducted, revealing critical insights. India, as the world's leading chickpea producer, plays a pivotal role, not only in production but also as a significant contributor to scholarly research and international collaborations. The choice of journals for publication is found to influence research impact.Analysis of research trends using co‐occurrence networks of keywords reveals evolving focuses, with a recent shift towards qualitative aspects, such as protein content and nutritional quality, as well as sustainable agricultural practices. The study also emphasizes the necessity for further research on chickpea quality characteristics, strategies to mitigate antinutritional factors, yield optimization, and the impact of climate change on chickpea cultivation. Ultimately, chickpea cultivation research holds great promise in contributing to global food security and environmental sustainability. This bibliometric analysis provides a comprehensive overview of chickpea cultivation research and offers valuable insights for researchers, policymakers, and stakeholders as they navigate the future of sustainable agriculture and the quest for protein‐rich food production while minimizing the environmental footprint.

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“…Thus, the mechanisms of pore filling through the physisorption process, electrostatic interaction of ions with surfaces, precipitation on the metallic surface, ligand exchange, and complexation are common trapping methods in adsorption. 33,45…”

Section: Introductionmentioning

confidence: 99%

Polymer-based nanocomposite adsorbents for resource recovery from wastewater

Ahmed,

Mekonnen,

Mekonnen

2023

RSC Adv.

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Mg/Zr modified nanobiochar from spent coffee grounds for phosphate recovery and its application as a phosphorous release fertilizer

Cited by 8 publications

References 46 publications

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

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

A Bibliometric Analysis of Chickpea Agronomic Practices in the World During 45 Years of Scientific Research

Polymer-based nanocomposite adsorbents for resource recovery from wastewater

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