Copper Oxide Nano Biochar from Spent Coffee Grounds for Phosphate Removal and its Application as an Antibacterially Active Entity

Biruk Yimam; Gamada Begna Sisay; Eskedar Getachew Feleke

Article Details

Copper Oxide Nano Biochar from Spent Coffee Grounds for Phosphate Removal and its Application as an Antibacterially Active Entity

Authors:

Biruk Yimam | Gamada Begna Sisay | Eskedar Getachew Feleke

Publisher:

Turkish Chemical Society

Main Topics:

Instrumental Methods

Journal:

Journal of the Turkish Chemical Society Section A: Chemistry Vol.11 Issue 2, pp.835-844

Document Type:

Article

Publication Date:

5/2024

Document Language:

English

Document ID (Org No.):

2001309575

pISSN:

2149-0120

Keywords:

Abstract:

 From the viewpoint of both eutrophication and sustainable use of phosphate, the removal and recovery of phosphate from wastewater are important. Adsorption is seen as a viable alternative for effective phosphate removal, even at low concentrations. It is very simple to operate and cheaper. Among the various adsorbents tested, biomass-derived nanomaterials, such as nanobiochar, have shown promising efficiency. However, the use of pristine biochar is often less effective and difficult to recycle. In the present study, copper oxide-modified nanobiochar from spent coffee grounds is presented as an effective phosphate adsorbent. The adsorbent was prepared by the acid digestion of spent coffee grounds, followed by the co-precipitation of copper metal. The developed adsorbent was characterized by BET, FTIR, and XRD. Batch mode adsorption studies were conducted to assess the adsorption efficiency of the developed adsorbent and to investigate the effect of pH, initial concentration, contact time, and adsorbent dose. It was observed that acidic conditions favored the adsorption of phosphate, with maximum adsorption efficiency 93 at pH 3. The maximum equilibrium phosphate adsorption capacity in this study was 50.2 mgg at 25 oC, pH 3, a phosphate concentration of 20 mgL, and an adsorbent dose of 35 mgmL. The batch experimental data fit the Freundlich isotherm with regression R2  0.991, which signifies that the surface of the adsorbent is heterogeneous. Adsorption kinetic data were best fitted with the pseudo-second-order kinetic model R2  0.996, indicating that the adsorption process was dominated by chemisorption. The copper oxide nanoparticles and CuNBC showed relatively higher zone inhibition in gram-positive bacteria than in gram-negative bacteria at similar concentrations. This might be due to the higher activity of the nanoparticle extract on gram-positive bacteria, as most nanoparticle extracts were more active in gram-positive bacteria. This difference may be explained by the difference in the structure of the cell wall in gram-positive bacteria, which consists of a single layer, and in gram-negative bacteria, which has a multi-layered structure and is quite complex. In the majority of test bacteria, CuNBC showed better activity. The higher activity of this nanomaterial might be associated with the number of bioactive metabolites and their synergetic activities.

 From the viewpoint of both eutrophication and sustainable use of phosphate, the removal and recovery of phosphate from wastewater are important. Adsorption is seen as a viable alternative for effective phosphate removal, even at low concentrations. It is very simple to operate and cheaper. Among the various adsorbents tested, biomass-derived nanomaterials, such as nanobiochar, have shown promising efficiency. However, the use of pristine biochar is often less effective and difficult to recycle. In the present study, copper oxide-modified nanobiochar from spent coffee grounds is presented as an effective phosphate adsorbent. The adsorbent was prepared by the acid digestion of spent coffee grounds, followed by the co-precipitation of copper metal. The developed adsorbent was characterized by BET, FTIR, and XRD. Batch mode adsorption studies were conducted to assess the adsorption efficiency of the developed adsorbent and to investigate the effect of pH, initial concentration, contact time, and adsorbent dose. It was observed that acidic conditions favored the adsorption of phosphate, with maximum adsorption efficiency 93 at pH 3. The maximum equilibrium phosphate adsorption capacity in this study was 50.2 mgg at 25 oC, pH 3, a phosphate concentration of 20 mgL, and an adsorbent dose of 35 mgmL. The batch experimental data fit the Freundlich isotherm with regression R2  0.991, which signifies that the surface of the adsorbent is heterogeneous. Adsorption kinetic data were best fitted with the pseudo-second-order kinetic model R2  0.996, indicating that the adsorption process was dominated by chemisorption. The copper oxide nanoparticles and CuNBC showed relatively higher zone inhibition in gram-positive bacteria than in gram-negative bacteria at similar concentrations. This might be due to the higher activity of the nanoparticle extract on gram-positive bacteria, as most nanoparticle extracts were more active in gram-positive bacteria. This difference may be explained by the difference in the structure of the cell wall in gram-positive bacteria, which consists of a single layer, and in gram-negative bacteria, which has a multi-layered structure and is quite complex. In the majority of test bacteria, CuNBC showed better activity. The higher activity of this nanomaterial might be associated with the number of bioactive metabolites and their synergetic activities.

 From the viewpoint of both eutrophication and sustainable use of phosphate, the removal and recovery of phosphate from wastewater are important. Adsorption is seen as a viable alternative for effective phosphate removal, even at low concentrations. It is very simple to operate and cheaper. Among the various adsorbents tested, biomass-derived nanomaterials, such as nanobiochar, have shown promising efficiency. However, the use of pristine biochar is often less effective and difficult to recycle. In the present study, copper oxide-modified nanobiochar from spent coffee grounds is presented as an effective phosphate adsorbent. The adsorbent was prepared by the acid digestion of spent coffee grounds, followed by the co-precipitation of copper metal. The developed adsorbent was characterized by BET, FTIR, and XRD. Batch mode adsorption studies were conducted to assess the adsorption efficiency of the developed adsorbent and to investigate the effect of pH, initial concentration, contact time, and adsorbent dose. It was observed that acidic conditions favored the adsorption of phosphate, with maximum adsorption efficiency 93 at pH 3. The maximum equilibrium phosphate adsorption capacity in this study was 50.2 mgg at 25 oC, pH 3, a phosphate concentration of 20 mgL, and an adsorbent dose of 35 mgmL. The batch experimental data fit the Freundlich isotherm with regression R2  0.991, which signifies that the surface of the adsorbent is heterogeneous. Adsorption kinetic data were best fitted with the pseudo-second-order kinetic model R2  0.996, indicating that the adsorption process was dominated by chemisorption. The copper oxide nanoparticles and CuNBC showed relatively higher zone inhibition in gram-positive bacteria than in gram-negative bacteria at similar concentrations. This might be due to the higher activity of the nanoparticle extract on gram-positive bacteria, as most nanoparticle extracts were more active in gram-positive bacteria. This difference may be explained by the difference in the structure of the cell wall in gram-positive bacteria, which consists of a single layer, and in gram-negative bacteria, which has a multi-layered structure and is quite complex. In the majority of test bacteria, CuNBC showed better activity. The higher activity of this nanomaterial might be associated with the number of bioactive metabolites and their synergetic activities.

 From the viewpoint of both eutrophication and sustainable use of phosphate, the removal and recovery of phosphate from wastewater are important. Adsorption is seen as a viable alternative for effective phosphate removal, even at low concentrations. It is very simple to operate and cheaper. Among the various adsorbents tested, biomass-derived nanomaterials, such as nanobiochar, have shown promising efficiency. However, the use of pristine biochar is often less effective and difficult to recycle. In the present study, copper oxide-modified nanobiochar from spent coffee grounds is presented as an effective phosphate adsorbent. The adsorbent was prepared by the acid digestion of spent coffee grounds, followed by the co-precipitation of copper metal. The developed adsorbent was characterized by BET, FTIR, and XRD. Batch mode adsorption studies were conducted to assess the adsorption efficiency of the developed adsorbent and to investigate the effect of pH, initial concentration, contact time, and adsorbent dose. It was observed that acidic conditions favored the adsorption of phosphate, with maximum adsorption efficiency 93 at pH 3. The maximum equilibrium phosphate adsorption capacity in this study was 50.2 mgg at 25 oC, pH 3, a phosphate concentration of 20 mgL, and an adsorbent dose of 35 mgmL. The batch experimental data fit the Freundlich isotherm with regression R2  0.991, which signifies that the surface of the adsorbent is heterogeneous. Adsorption kinetic data were best fitted with the pseudo-second-order kinetic model R2  0.996, indicating that the adsorption process was dominated by chemisorption. The copper oxide nanoparticles and CuNBC showed relatively higher zone inhibition in gram-positive bacteria than in gram-negative bacteria at similar concentrations. This might be due to the higher activity of the nanoparticle extract on gram-positive bacteria, as most nanoparticle extracts were more active in gram-positive bacteria. This difference may be explained by the difference in the structure of the cell wall in gram-positive bacteria, which consists of a single layer, and in gram-negative bacteria, which has a multi-layered structure and is quite complex. In the majority of test bacteria, CuNBC showed better activity. The higher activity of this nanomaterial might be associated with the number of bioactive metabolites and their synergetic activities.

Article Details

Copper Oxide Nano Biochar from Spent Coffee Grounds for Phosphate Removal and its Application as an Antibacterially Active Entity

Authors:

Biruk Yimam | Gamada Begna Sisay | Eskedar Getachew Feleke

Publisher:

Turkish Chemical Society

Main Topics:

Instrumental Methods

Journal:

Journal of the Turkish Chemical Society Section A: Chemistry Vol.11 Issue 2, pp.835-844

Document Type:

Article

Publication Date:

5/2024

Document Language:

English

Document ID (Org No.):

2001309575

pISSN:

2149-0120

Adsorption

Antibacterial activity

Copper oxide nano biochar

Phosphate

Spent coffee

Issues

Article Details

Copper Oxide Nano Biochar from Spent Coffee Grounds for Phosphate Removal and its Application as an Antibacterially Active Entity

Authors: Biruk Yimam | Gamada Begna Sisay | Eskedar Getachew Feleke

Publisher: Turkish Chemical Society

Main Topics: Instrumental Methods

Journal: Journal of the Turkish Chemical Society Section A: Chemistry Vol.11 Issue 2, pp.835-844

Document Type: Article

Publication Date: 5/2024

Document Language: English

Document ID (Org No.): 2001309575

pISSN: 2149-0120

Adsorption

Antibacterial activity

Copper oxide nano biochar

Phosphate

Spent coffee

Issues

Authors:

Biruk Yimam | Gamada Begna Sisay | Eskedar Getachew Feleke

Publisher:

Turkish Chemical Society

Main Topics:

Instrumental Methods

Journal:

Journal of the Turkish Chemical Society Section A: Chemistry Vol.11 Issue 2, pp.835-844

Document Type:

Article

Publication Date:

5/2024

Document Language:

English

Document ID (Org No.):

2001309575

pISSN:

2149-0120