Pub Date : 2024-12-30DOI: 10.1016/j.scenv.2024.100205
Randhir Rai
This study follows the circular economy principle to explore the catalytic potential of second-cycle cuprous oxide laboratory waste. Undergraduate students generated cuprous oxide as a second cycle waste during a practical session, where they used an aqueous solution of recycled copper sulfate pentahydrate as a Fehling’s reagent A. The cuprous oxide waste was isolated by a simple filtration method and characterized using infrared spectroscopy, powder X-ray diffraction, X-ray photoelectron spectroscopy, and electron microscopic techniques. The isolated material was used as an active click catalyst to synthesize beta-keto-1,2,3-triazole in an aqueous medium via a one-pot, three-component click reaction. The catalytic activity of the second-cycled cuprous oxide waste was compared with first-cycled cuprous oxide waste and commercial cuprous oxide. We observed that the catalyst was recycled and reused for up to two cycles without significant yield loss. Also, the synthesized beta-keto-1,2,3-triazole was found to show chelating properties towards copper.
{"title":"Catalytic application of second cycle copper-based laboratory waste for synthesis of beta-keto-1,2,3-triazole: A micro circular economy approach","authors":"Randhir Rai","doi":"10.1016/j.scenv.2024.100205","DOIUrl":"10.1016/j.scenv.2024.100205","url":null,"abstract":"<div><div>This study follows the circular economy principle to explore the catalytic potential of second-cycle cuprous oxide laboratory waste. Undergraduate students generated cuprous oxide as a second cycle waste during a practical session, where they used an aqueous solution of recycled copper sulfate pentahydrate as a Fehling’s reagent A. The cuprous oxide waste was isolated by a simple filtration method and characterized using infrared spectroscopy, powder X-ray diffraction, X-ray photoelectron spectroscopy, and electron microscopic techniques. The isolated material was used as an active click catalyst to synthesize beta-keto-1,2,3-triazole in an aqueous medium <em>via</em> a one-pot, three-component click reaction. The catalytic activity of the second-cycled cuprous oxide waste was compared with first-cycled cuprous oxide waste and commercial cuprous oxide. We observed that the catalyst was recycled and reused for up to two cycles without significant yield loss. Also, the synthesized beta-keto-1,2,3-triazole was found to show chelating properties towards copper.</div></div>","PeriodicalId":101196,"journal":{"name":"Sustainable Chemistry for the Environment","volume":"9 ","pages":"Article 100205"},"PeriodicalIF":0.0,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143177726","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-12-30DOI: 10.1016/j.scenv.2024.100201
Khalifa Musa Muhammad , Modupe Munirat Adeyemi , Joseph Jacob , Abubakar Rabiu Koko , Kabiru Dauda , Anas Ali Tamasi , Ibrahim Yahuza
Energy is crucial in the 21st century as it immensely contributes to growth and development. Fossil fuel serves as the backbone of the world’s energy demand. This source of energy is non-renewable and it adversely affects the environment. Africa suffers from the challenge of energy crisis and this negatively affects the development of the continent. To remedy this, it is pertinent to focus on energy sources that are environmentally friendly. This study highlights the potential of biodiesel production in Africa with a focus on non-edible sources. The sources, emission characteristics, oil content, percentage yield and properties of these samples are stated. These sources do not compete with food so there is no contention of “food versus fuel”. The study clearly highlights the advantages of biodiesel such as high cetane number and flash point; less toxicity; renewable; and biodegradable amongst others. Techniques for enhancing the cold flow properties of biodiesel are stated. Policies and laws that support biodiesel production were discussed. The key factors that should be incorporated in every biofuel policy or legislation was recommended. Biodiesel utilization is in accordance with Sustainable Development Goal 7 “clean and affordable energy”. The study also presents potentials, benefits, challenges, and solution of biodiesel production and utilization in Africa which gives a picture of its socio-economic implications.
{"title":"Biodiesel production in Africa from non-edible sources: Sources, production, properties and policies","authors":"Khalifa Musa Muhammad , Modupe Munirat Adeyemi , Joseph Jacob , Abubakar Rabiu Koko , Kabiru Dauda , Anas Ali Tamasi , Ibrahim Yahuza","doi":"10.1016/j.scenv.2024.100201","DOIUrl":"10.1016/j.scenv.2024.100201","url":null,"abstract":"<div><div>Energy is crucial in the 21st century as it immensely contributes to growth and development. Fossil fuel serves as the backbone of the world’s energy demand. This source of energy is non-renewable and it adversely affects the environment. Africa suffers from the challenge of energy crisis and this negatively affects the development of the continent. To remedy this, it is pertinent to focus on energy sources that are environmentally friendly. This study highlights the potential of biodiesel production in Africa with a focus on non-edible sources. The sources, emission characteristics, oil content, percentage yield and properties of these samples are stated. These sources do not compete with food so there is no contention of “food versus fuel”. The study clearly highlights the advantages of biodiesel such as high cetane number and flash point; less toxicity; renewable; and biodegradable amongst others. Techniques for enhancing the cold flow properties of biodiesel are stated. Policies and laws that support biodiesel production were discussed. The key factors that should be incorporated in every biofuel policy or legislation was recommended. Biodiesel utilization is in accordance with Sustainable Development Goal 7 “clean and affordable energy”. The study also presents potentials, benefits, challenges, and solution of biodiesel production and utilization in Africa which gives a picture of its socio-economic implications.</div></div>","PeriodicalId":101196,"journal":{"name":"Sustainable Chemistry for the Environment","volume":"9 ","pages":"Article 100201"},"PeriodicalIF":0.0,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143177731","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-12-28DOI: 10.1016/j.scenv.2024.100204
Ravi A. Dabhi , Milan P. Dhaduk , Nirbhay K. Savaliya , Aelvish D. Padariya , Aakanksha P. Patil , Riya A. Desai , Vaibhav D. Bhatt , Bhupesh S. Bhatt
Scientists have recently focused on crafting a more natural approach to catalysis to make organic synthesis more sustainable and eco-friendly. This manuscript highlights an environment-friendly, efficient synthesis of novel spirocyclic derivatives (QP 1 – QP 12) of quinoxaline pyrimidine mediated through sustainable green catalyst potash alum. The research was conducted with thoroughness, as computational techniques were used to examine the interaction of topoisomerase II enzyme with spiro compounds. The computational analysis was also accompanied to determine the interaction of spirocyclic compounds with biomolecules, i.e., 1BNA and BSA. Anticancer activity was carried out on MCF-7 regarding IC50 value, which ranges between 76.67 and 138.34 µg/mL. The spirocyclic compounds showed good antimicrobial activity and cytotoxic nature against five bacterial strains and artemia cysts. The compound’s MIC and LC50 values were found in the 135–195 µM range and 6.26–10.91 µg/mL, respectively. Spectroscopic techniques were performed for evaluating the binding strength between spirocyclic compounds and biomolecules. The binding constant values of QP 1 – QP 12 with CT-DNA and BSA were found in the range of 0.61–1.45 × 105 M−1 and 0.16–2.19 × 104 M−1, respectively. SwissADME and admetSAR, two online platforms, were used to assess the pharmacokinetic profile and determine the drug-likeness of the synthesized compounds.
{"title":"Multi-component sustainable catalytic crafting of novel heterocyclic spiranes as topoisomerase II inhibitors","authors":"Ravi A. Dabhi , Milan P. Dhaduk , Nirbhay K. Savaliya , Aelvish D. Padariya , Aakanksha P. Patil , Riya A. Desai , Vaibhav D. Bhatt , Bhupesh S. Bhatt","doi":"10.1016/j.scenv.2024.100204","DOIUrl":"10.1016/j.scenv.2024.100204","url":null,"abstract":"<div><div>Scientists have recently focused on crafting a more natural approach to catalysis to make organic synthesis more sustainable and eco-friendly. This manuscript highlights an environment-friendly, efficient synthesis of novel spirocyclic derivatives (QP 1 – QP 12) of quinoxaline pyrimidine mediated through sustainable green catalyst potash alum. The research was conducted with thoroughness, as computational techniques were used to examine the interaction of topoisomerase II enzyme with spiro compounds. The computational analysis was also accompanied to determine the interaction of spirocyclic compounds with biomolecules, i.e., 1BNA and BSA. Anticancer activity was carried out on MCF-7 regarding IC<sub>50</sub> value, which ranges between 76.67 and 138.34 µg/mL. The spirocyclic compounds showed good antimicrobial activity and cytotoxic nature against five bacterial strains and artemia cysts. The compound’s MIC and LC<sub>50</sub> values were found in the 135–195 µM range and 6.26–10.91 µg/mL, respectively. Spectroscopic techniques were performed for evaluating the binding strength between spirocyclic compounds and biomolecules. The binding constant values of QP 1 – QP 12 with CT-DNA and BSA were found in the range of 0.61–1.45 × 10<sup>5</sup> M<sup>−1</sup> and 0.16–2.19 × 10<sup>4</sup> M<sup>−1</sup>, respectively. SwissADME and admetSAR, two online platforms, were used to assess the pharmacokinetic profile and determine the drug-likeness of the synthesized compounds.</div></div>","PeriodicalId":101196,"journal":{"name":"Sustainable Chemistry for the Environment","volume":"9 ","pages":"Article 100204"},"PeriodicalIF":0.0,"publicationDate":"2024-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143177727","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-12-28DOI: 10.1016/j.scenv.2024.100203
Farhan Munim, Mubashir Bin Faruk, Md.Abul Hashem, Md.Mukimujjaman Miem
Liming is considered the first chemical treatment in the tanning industry where the animal’s outer covering is treated with sodium sulfide and hydrated lime. Generated wastewater from liming operations contains a large amount of soluble sulfide. Upon acidification, the emitted soluble sulfide in wastewater poses an environmental threat generating gaseous hydrogen sulfide. In this study, a combination of chemically and thermally activated banana peel adsorbent was utilized to eliminate soluble sulfide from the tannery liming wastewater in the column experiment. The prepared absorbents were assessed by a scanning electron microscope (SEM) and energy-dispersive X-ray spectroscopy (EDS) for characterization. Results indicate that the column analysis at optimum adsorbent dose and flow rate showed a significant reduction of sulfide (95.8 %), biochemical oxygen demand (93.3 %), chemical oxygen demand (93.2 %), and total dissolved solids (99.6 %). SEM micrographs of the treated adsorbent illustrated the adsorption of sulfide and other pollutants confirming the presence of various elements in the EDS spectrum. The mechanism of higher sulfide removal efficiency is explained through the pH point of zero charge (pHpzc). The liming wastewater treatment with the proposed method showed acceptable outcomes compared to the previous studies. Hence, the present investigation illustrates a promising sustainable approach using modified banana peel adsorbent to treat tannery liming wastewater.
{"title":"Treatment of pre-treated liming wastewater in tannery by mixed banana peel adsorbent in column filtration studies","authors":"Farhan Munim, Mubashir Bin Faruk, Md.Abul Hashem, Md.Mukimujjaman Miem","doi":"10.1016/j.scenv.2024.100203","DOIUrl":"10.1016/j.scenv.2024.100203","url":null,"abstract":"<div><div>Liming is considered the first chemical treatment in the tanning industry where the animal’s outer covering is treated with sodium sulfide and hydrated lime. Generated wastewater from liming operations contains a large amount of soluble sulfide. Upon acidification, the emitted soluble sulfide in wastewater poses an environmental threat generating gaseous hydrogen sulfide. In this study, a combination of chemically and thermally activated banana peel adsorbent was utilized to eliminate soluble sulfide from the tannery liming wastewater in the column experiment. The prepared absorbents were assessed by a scanning electron microscope (SEM) and energy-dispersive X-ray spectroscopy (EDS) for characterization. Results indicate that the column analysis at optimum adsorbent dose and flow rate showed a significant reduction of sulfide (95.8 %), biochemical oxygen demand (93.3 %), chemical oxygen demand (93.2 %), and total dissolved solids (99.6 %). SEM micrographs of the treated adsorbent illustrated the adsorption of sulfide and other pollutants confirming the presence of various elements in the EDS spectrum. The mechanism of higher sulfide removal efficiency is explained through the pH point of zero charge (pHpzc). The liming wastewater treatment with the proposed method showed acceptable outcomes compared to the previous studies. Hence, the present investigation illustrates a promising sustainable approach using modified banana peel adsorbent to treat tannery liming wastewater.</div></div>","PeriodicalId":101196,"journal":{"name":"Sustainable Chemistry for the Environment","volume":"9 ","pages":"Article 100203"},"PeriodicalIF":0.0,"publicationDate":"2024-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143177730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-12-27DOI: 10.1016/j.scenv.2024.100197
P. Thamarai, R. Kamalesh, V.C. Deivayanai, S. Karishma, A. Saravanan, P.R. Yaashikaa, A.S. Vickram
Heavy metals in water, particularly cadmium, pose significant risks to environmental and public health due to their toxicity. This study investigates the removal of cadmium ions from aqueous solutions using Hypnea valentiae, a naturally abundant and cost-effective biosorbent. Batch experiments demonstrated that optimal cadmium removal occurred at pH 5, a biosorbent dose of 2 g/L, a contact time of 50 min, and a temperature of 303 K. Characterization using scanning electron microscopy, energy-dispersive X-ray spectroscopy, Fourier-transform infrared spectroscopy, and X-ray diffraction confirmed morphological and chemical changes in the biosorbent, indicating successful binding of cadmium ions to surface functional groups. Kinetic analysis revealed that the adsorption process followed a pseudo-second-order model, highlighting chemisorption as the dominant mechanism. Isotherm modeling showed that the Langmuir model best described the adsorption, with a maximum capacity of 141.24 mg/g. Thermodynamic studies indicated that the process was exothermic and spontaneous, with decreasing spontaneity at higher temperatures. Furthermore, an artificial neural network model demonstrated strong predictive accuracy (R2 = 0.989), closely aligning experimental and predicted outcomes. Regeneration tests showed that the Hypnea valentiae biosorbent retained 63.4 % of its original efficiency after eight cycles, highlighting its durability and potential for reuse. These findings highlight Hypnea valentiae's potential as an efficient, sustainable biosorbent for cadmium remediation, offering a viable solution for addressing heavy metal pollution in water systems.
{"title":"Modeling and prediction of cadmium ion biosorption efficiency using neural networks with Hypnea valentiae","authors":"P. Thamarai, R. Kamalesh, V.C. Deivayanai, S. Karishma, A. Saravanan, P.R. Yaashikaa, A.S. Vickram","doi":"10.1016/j.scenv.2024.100197","DOIUrl":"10.1016/j.scenv.2024.100197","url":null,"abstract":"<div><div>Heavy metals in water, particularly cadmium, pose significant risks to environmental and public health due to their toxicity. This study investigates the removal of cadmium ions from aqueous solutions using <em>Hypnea valentiae</em>, a naturally abundant and cost-effective biosorbent. Batch experiments demonstrated that optimal cadmium removal occurred at pH 5, a biosorbent dose of 2 g/L, a contact time of 50 min, and a temperature of 303 K. Characterization using scanning electron microscopy, energy-dispersive X-ray spectroscopy, Fourier-transform infrared spectroscopy, and X-ray diffraction confirmed morphological and chemical changes in the biosorbent, indicating successful binding of cadmium ions to surface functional groups. Kinetic analysis revealed that the adsorption process followed a pseudo-second-order model, highlighting chemisorption as the dominant mechanism. Isotherm modeling showed that the Langmuir model best described the adsorption, with a maximum capacity of 141.24 mg/g. Thermodynamic studies indicated that the process was exothermic and spontaneous, with decreasing spontaneity at higher temperatures. Furthermore, an artificial neural network model demonstrated strong predictive accuracy (R<sup>2</sup> = 0.989), closely aligning experimental and predicted outcomes. Regeneration tests showed that the <em>Hypnea valentiae</em> biosorbent retained 63.4 % of its original efficiency after eight cycles, highlighting its durability and potential for reuse. These findings highlight <em>Hypnea valentiae</em>'s potential as an efficient, sustainable biosorbent for cadmium remediation, offering a viable solution for addressing heavy metal pollution in water systems.</div></div>","PeriodicalId":101196,"journal":{"name":"Sustainable Chemistry for the Environment","volume":"9 ","pages":"Article 100197"},"PeriodicalIF":0.0,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143177729","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS) methodologies were employed to conduct electrochemical investigations of 1-(pyridyl-2-azo)-naphthol-2 (PAN) on MS (Mild Steel), with the aim of evaluating its corrosion mitigation properties. The results of these analysis demonstrate that the presence of PAN leads to effective corrosion mitigation of MS. Its efficiency to inhibit corrosion is enhanced on increasing of concentration and the efficiency attains the maximum of 97.8 % at 10−3 mol L−1. The change in value of Ecorr less than 85 mV indicates that PAN behaves as a mixed type inhibitor. The mitigation has been thus caused by the development of a protective film by adsorbing PAN on MS. The adsorption process is best suited to Langmuir’s isotherm. Chemisorption and inhibition is strengthened by the synergetic effect between anions and PANH+. EIS studies reveal that the charge transfer resistance (Rt) rises from 8.4 Ω cm2 for H2SO4 to 61.1 Ω cm2 for 10−3 M PAN while the value of double layer capacitance (Cdl) falls from 174.66 × 10−4 F cm−2 to 10.26 × 10−4 F cm−2 at 10−3 M PAN. This confirms the inhibition of corrosion of MS. The result of Fourier transform infrared suggests the involvement of electron-rich groups such as N, O and aromatic π-electrons in adsorption. Monographs of Field emission scanning electron microscopy display the development of the coating of PAN on MS. Density functional theory studies supplement the electrochemical findings. Thus, the studies carried out in this paper prove that PAN can behave as an excellent inhibitor of MS in acid media.
{"title":"Electrochemical and theoretical studies of 1-(pyridyl-2-azo)-naphthol-2 for control of corrosion of mild steel under H2SO4 environment","authors":"Rajni Kanojia , Sunita Hooda , Bipasa Arya , Amal Joshy , Neeti Misra , Himanshu , M. Ramananda Singh , Shramila Yadav , Sangeeta Kaul , Neelu Dheer","doi":"10.1016/j.scenv.2024.100202","DOIUrl":"10.1016/j.scenv.2024.100202","url":null,"abstract":"<div><div>Potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS) methodologies were employed to conduct electrochemical investigations of 1-(pyridyl-2-azo)-naphthol-2 (PAN) on MS (Mild Steel), with the aim of evaluating its corrosion mitigation properties. The results of these analysis demonstrate that the presence of PAN leads to effective corrosion mitigation of MS. Its efficiency to inhibit corrosion is enhanced on increasing of concentration and the efficiency attains the maximum of 97.8 % at 10<sup>−3</sup> mol L<sup>−1</sup>. The change in value of E<sub>corr</sub> less than 85 mV indicates that PAN behaves as a mixed type inhibitor. The mitigation has been thus caused by the development of a protective film by adsorbing PAN on MS. The adsorption process is best suited to Langmuir’s isotherm. Chemisorption and inhibition is strengthened by the synergetic effect between anions and PANH<sup>+</sup>. EIS studies reveal that the charge transfer resistance (R<sub>t</sub>) rises from 8.4 Ω cm<sup>2</sup> for H<sub>2</sub>SO<sub>4</sub> to 61.1 Ω cm<sup>2</sup> for 10<sup>−3</sup> M PAN while the value of double layer capacitance (C<sub>dl</sub>) falls from 174.66 × 10<sup>−4</sup> F cm<sup>−2</sup> to 10.26 × 10<sup>−4</sup> F cm<sup>−2</sup> at 10<sup>−3</sup> M PAN. This confirms the inhibition of corrosion of MS. The result of Fourier transform infrared suggests the involvement of electron-rich groups such as N, O and aromatic π-electrons in adsorption. Monographs of Field emission scanning electron microscopy display the development of the coating of PAN on MS. Density functional theory studies supplement the electrochemical findings. Thus, the studies carried out in this paper prove that PAN can behave as an excellent inhibitor of MS in acid media.</div></div>","PeriodicalId":101196,"journal":{"name":"Sustainable Chemistry for the Environment","volume":"9 ","pages":"Article 100202"},"PeriodicalIF":0.0,"publicationDate":"2024-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143178261","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-12-25DOI: 10.1016/j.scenv.2024.100196
Ritesh Ojha, Debabrata Pradhan
Climate change has been dramatically exacerbated by the increasing emissions of greenhouse gases brought on by industrial growth and the usage of non-renewable energy sources, making the transition to sustainable energy solutions imperative. Concurrently, the depletion of natural gas and petroleum supplies and their negative environmental effects worsen the global energy problem. Microbial fuel cell converts organic waste into renewable energy, a promising technology that combines waste management and sustainable energy generation. This review aims to present a thorough analysis of microbial fuel cell technology, highlighting new developments and their capacity to turn waste into wealth. The paper examines the fundamental ideas, essential elements, different microbial fuel cell setups, extracellular electron transport methods, and microbial interactions. Additionally, it assesses variables influencing microbial fuel cell performance and emphasises its uses in bioenergy production and wastewater treatment. With an emphasis on creative approaches and comparative performance analysis, this study highlights the importance of microbial fuel cells in tackling environmental and energy concerns by compiling recent research. The knowledge and development of microbial fuel cell technology are advanced by the insights offered, opening the door to a more ecologically conscious and sustainable future.
{"title":"The potential of microbial fuel cell for converting waste to energy: An overview","authors":"Ritesh Ojha, Debabrata Pradhan","doi":"10.1016/j.scenv.2024.100196","DOIUrl":"10.1016/j.scenv.2024.100196","url":null,"abstract":"<div><div>Climate change has been dramatically exacerbated by the increasing emissions of greenhouse gases brought on by industrial growth and the usage of non-renewable energy sources, making the transition to sustainable energy solutions imperative. Concurrently, the depletion of natural gas and petroleum supplies and their negative environmental effects worsen the global energy problem. Microbial fuel cell converts organic waste into renewable energy, a promising technology that combines waste management and sustainable energy generation. This review aims to present a thorough analysis of microbial fuel cell technology, highlighting new developments and their capacity to turn waste into wealth. The paper examines the fundamental ideas, essential elements, different microbial fuel cell setups, extracellular electron transport methods, and microbial interactions. Additionally, it assesses variables influencing microbial fuel cell performance and emphasises its uses in bioenergy production and wastewater treatment. With an emphasis on creative approaches and comparative performance analysis, this study highlights the importance of microbial fuel cells in tackling environmental and energy concerns by compiling recent research. The knowledge and development of microbial fuel cell technology are advanced by the insights offered, opening the door to a more ecologically conscious and sustainable future.</div></div>","PeriodicalId":101196,"journal":{"name":"Sustainable Chemistry for the Environment","volume":"9 ","pages":"Article 100196"},"PeriodicalIF":0.0,"publicationDate":"2024-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143178665","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-12-25DOI: 10.1016/j.scenv.2024.100190
Uvin Thavisha Jayalath , Himali Samaraweera , Amal Samarasinghe
The increasing global challenge of plastic pollution necessitates the exploration of sustainable alternatives to conventional plastics. This study investigates the development of bioplastics using pharmaceutical gelatin residue combined with starches derived from cassava, corn, and rice. The primary objective is to enhance bioplastic formulations by evaluating their mechanical, thermal, and biodegradability characteristics. The bioplastics were subjected to Fourier-transform infrared (FTIR) spectroscopy, Thermogravimetric analysis (TGA), and scanning electron microscopy (SEM) to assess their properties. The results indicate that cassava-based bioplastics exhibit superior hardness, water absorption, and biodegradation rate performance compared to their corn and rice counterparts. Specifically, cassava bioplastics demonstrated a hardness of 57.2 N, a water absorption capacity of 139.8 %, and a biodegradation rate of 67.0 % after 7 days. These findings underscore the potential of cassava-based bioplastics as viable, sustainable alternatives derived from renewable resources, offering an environmentally friendly solution to reduce plastic waste across various sectors, including packaging and agriculture.
{"title":"Development and characterization of gelatin-starch bioplastics: A comparative study of cassava, corn, and rice-based alternatives","authors":"Uvin Thavisha Jayalath , Himali Samaraweera , Amal Samarasinghe","doi":"10.1016/j.scenv.2024.100190","DOIUrl":"10.1016/j.scenv.2024.100190","url":null,"abstract":"<div><div>The increasing global challenge of plastic pollution necessitates the exploration of sustainable alternatives to conventional plastics. This study investigates the development of bioplastics using pharmaceutical gelatin residue combined with starches derived from cassava, corn, and rice. The primary objective is to enhance bioplastic formulations by evaluating their mechanical, thermal, and biodegradability characteristics. The bioplastics were subjected to Fourier-transform infrared (FTIR) spectroscopy, Thermogravimetric analysis (TGA), and scanning electron microscopy (SEM) to assess their properties. The results indicate that cassava-based bioplastics exhibit superior hardness, water absorption, and biodegradation rate performance compared to their corn and rice counterparts. Specifically, cassava bioplastics demonstrated a hardness of 57.2 N, a water absorption capacity of 139.8 %, and a biodegradation rate of 67.0 % after 7 days. These findings underscore the potential of cassava-based bioplastics as viable, sustainable alternatives derived from renewable resources, offering an environmentally friendly solution to reduce plastic waste across various sectors, including packaging and agriculture.</div></div>","PeriodicalId":101196,"journal":{"name":"Sustainable Chemistry for the Environment","volume":"9 ","pages":"Article 100190"},"PeriodicalIF":0.0,"publicationDate":"2024-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143178666","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-12-24DOI: 10.1016/j.scenv.2024.100198
Satyabrata Nanda , Satabdi Tripathy , Pratyush Kumar Das
Hexavalent Chromium is mostly formed from various mining and industrial activities and has severe toxic implications for biotic components. It also hampers soil nutrient profile, thus hindering plant productivity. Bioaccumulation of Cr (VI) in plant tissues reduces plant growth and vigor and poses the risk of transferring the toxic metal to humans through the food chain. It is highly essential to reduce Cr (VI) concentrations in the soil and reduce its transfer into plant tissues. Plant growth-promoting rhizobacterial species are an efficient tool to cater to the problem. The current article discusses the role of such beneficial microbes in the sustainable remediation of Cr (VI) contaminated soil while alleviating stress and promoting growth. Various studies have claimed the expert role of these microbes in Cr (VI) remediation. However, little progress has been made concerning their feasible application in Cr (VI) contaminated soils. One of the major gaps is the lack of understanding of the remediation potential of these PGPRs at a molecular level. Recent strategies, like the synergistic application of PGPRs and microbial immobilization, have been highlighted as feasible methods for the successful remediation of Cr (VI) contaminated soils. The adoption of multi-omics techniques has been proposed for better identification of PGPRs.
{"title":"Delineating the role of rhizospheric microbes in the amelioration of hexavalent chromium stress in plants","authors":"Satyabrata Nanda , Satabdi Tripathy , Pratyush Kumar Das","doi":"10.1016/j.scenv.2024.100198","DOIUrl":"10.1016/j.scenv.2024.100198","url":null,"abstract":"<div><div>Hexavalent Chromium is mostly formed from various mining and industrial activities and has severe toxic implications for biotic components. It also hampers soil nutrient profile, thus hindering plant productivity. Bioaccumulation of Cr (VI) in plant tissues reduces plant growth and vigor and poses the risk of transferring the toxic metal to humans through the food chain. It is highly essential to reduce Cr (VI) concentrations in the soil and reduce its transfer into plant tissues. Plant growth-promoting rhizobacterial species are an efficient tool to cater to the problem. The current article discusses the role of such beneficial microbes in the sustainable remediation of Cr (VI) contaminated soil while alleviating stress and promoting growth. Various studies have claimed the expert role of these microbes in Cr (VI) remediation. However, little progress has been made concerning their feasible application in Cr (VI) contaminated soils. One of the major gaps is the lack of understanding of the remediation potential of these PGPRs at a molecular level. Recent strategies, like the synergistic application of PGPRs and microbial immobilization, have been highlighted as feasible methods for the successful remediation of Cr (VI) contaminated soils. The adoption of multi-omics techniques has been proposed for better identification of PGPRs.</div></div>","PeriodicalId":101196,"journal":{"name":"Sustainable Chemistry for the Environment","volume":"9 ","pages":"Article 100198"},"PeriodicalIF":0.0,"publicationDate":"2024-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143177735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-12-24DOI: 10.1016/j.scenv.2024.100200
Satyaranjan Jena , Arnab Ghosh , Novuhulu Rhakho , Ramesh B. Dateer , Akshaya K. Samal
We report a one-pot synthesis method to synthesize Cu2O nanocubes (NCs) and octahedra (Oh) using mild reducing agents such as ascorbic acid (L-AA), and D-glucose, respectively. The shape-dependent nanostructures of Cu2O have been characterized using various spectroscopic and microscopic techniques exhibiting an average size of 450 and 650 nm for Cu2O NCs and Oh, respectively which is influenced by their size and presence of various facets. X-ray diffraction (XRD) patterns reveal the crystalline nature of Cu2O nanostructures. The synthesized Cu2O NCs and Oh were investigated for their catalytic potential in phenylacetylene homocoupling organic reaction. The aryl alkyne homocoupling reaction demonstrates excellent efficacy under optimized reaction conditions. This work highlights the potential of (111)-bound Cu2O Oh in achieving high organocatalytic activity for aryl alkyne homocoupling transformations. Furthermore, Cu2O Oh demonstrated efficacy in catalyzing a wide range of substituted aryl alkynes under optimized reaction conditions, underscoring the importance of facet engineering in nanocatalysts for organic coupling reactions. The study found that Cu2O Oh exhibited enhanced catalytic efficiency, achieving a yield of 95.6 %, which is significantly higher than the 54.3 % yield obtained with Cu2O NCs. This superior performance of Cu2O Oh is attributed to the high catalytic activity of the (111) facets.
{"title":"Cu2O nanocrystals: Unveiling facet-dependent catalysis in phenylacetylene homocoupling","authors":"Satyaranjan Jena , Arnab Ghosh , Novuhulu Rhakho , Ramesh B. Dateer , Akshaya K. Samal","doi":"10.1016/j.scenv.2024.100200","DOIUrl":"10.1016/j.scenv.2024.100200","url":null,"abstract":"<div><div>We report a one-pot synthesis method to synthesize Cu<sub>2</sub>O nanocubes (NCs) and octahedra (Oh) using mild reducing agents such as ascorbic acid (L-AA), and D-glucose, respectively. The shape-dependent nanostructures of Cu<sub>2</sub>O have been characterized using various spectroscopic and microscopic techniques exhibiting an average size of 450 and 650 nm for Cu<sub>2</sub>O NCs and Oh, respectively which is influenced by their size and presence of various facets. X-ray diffraction (XRD) patterns reveal the crystalline nature of Cu<sub>2</sub>O nanostructures. The synthesized Cu<sub>2</sub>O NCs and Oh were investigated for their catalytic potential in phenylacetylene homocoupling organic reaction. The aryl alkyne homocoupling reaction demonstrates excellent efficacy under optimized reaction conditions. This work highlights the potential of (111)-bound Cu<sub>2</sub>O Oh in achieving high organocatalytic activity for aryl alkyne homocoupling transformations. Furthermore, Cu<sub>2</sub>O Oh demonstrated efficacy in catalyzing a wide range of substituted aryl alkynes under optimized reaction conditions, underscoring the importance of facet engineering in nanocatalysts for organic coupling reactions. The study found that Cu<sub>2</sub>O Oh exhibited enhanced catalytic efficiency, achieving a yield of 95.6 %, which is significantly higher than the 54.3 % yield obtained with Cu<sub>2</sub>O NCs. This superior performance of Cu<sub>2</sub>O Oh is attributed to the high catalytic activity of the (111) facets.</div></div>","PeriodicalId":101196,"journal":{"name":"Sustainable Chemistry for the Environment","volume":"9 ","pages":"Article 100200"},"PeriodicalIF":0.0,"publicationDate":"2024-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143178667","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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