Cost-effective FTIR and 1H NMR spectrometry used to screen valuable molecules extracted from selected West African trees by a sustainable biochar process

Salami, Ayobami; Vilppo, Teemu; Pitkänen, Sari; Weisell, Janne; Raninen, Kaisa; Vepsäläinen, Jouko; Lappalainen, Reijo

doi:10.1016/j.sciaf.2020.e00315

Cited by 7 publications

(3 citation statements)

References 14 publications

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“…The peak 6 (0.42 ppm, CH 2 ) indicates the signal arising from the methylene group of ChCl. Furthermore, the esterification yield was obtained as 12 mol % from the integral values I 1 , I 6, I 3 , I 8 I 4 , and I 5 , as reported by Rodriguez Rodriguez et al The additional peak labeled as 9 (0.36 ppm, CH 3 ) was attributed to the presence of methyl group in the acetate ion, confirms the formation of acetic acid byproduct during the oxidative decarboxylation …”

Section: Resultssupporting

confidence: 69%

“…To provide further insights into the consumption of H + , we monitored pH variations with varying quantities of LCO and different 41 The additional peak labeled as 9 (0.36 ppm, CH 3 ) was attributed to the presence of methyl group in the acetate ion, confirms the formation of acetic acid byproduct during the oxidative decarboxylation. 42 CV was additionally employed to understand the reduction process, depicted in Figure 6d. A distinct peak was observed at −0.18 V versus Ag/AgCl in the CV, attributed to the reduction of Co(III) to Co(II).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Beyond the Conventional Leaching: Exploring Pyruvic Acid-Based Deep Eutectic Solvents for Sustainable Recycling of Spent Lithium-Ion Battery Cathode Material

Chenthamara,

Gardas

2024

ACS Sustainable Chem. Eng.

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In the relentless pursuit of technological advancement, the world is steering toward groundbreaking progress, particularly in the domain of energy production and storage. In the energy storage domain, the role of Li-ion batteries (LIBs) is indispensable, which leads to their propelling surge and, consequently, an upswing in scrap generation. Considering the environmental impact and the exorbitant value of lithium and heavy metals in spent LIBs, a less hazardous and more efficient recovery is imperative. Herein, a deep eutectic solvent (DES) was devised to efficiently extract valuable metals from spent LIBs under optimized experimental conditions, notably without any additional reducing agents. We proposed two different choline chloride (ChCl)-based DESs, employing pyruvic acid (PA) and glyoxilic acid (GLY) as hydrogen bond donors. Through the vertical ionization potential (VIP) calculations, it was observed that PA manifests a lower VIP than GLY, indicating its propensity as a favored reductant for leaching cathode materials. Experimental findings further validated this assertion, demonstrating that ChCl/PA (1:1) effectively extracts 99% of both Co and Li from spent LIB cathode materials at 80 °C within a 5 h leaching duration. Compared to conventional lixiviants, this approach using ChCl/PA offered a significant leaching efficiency and brings benefits to the sustainable economy. Interestingly, the Co and Li recovery from the DES reached >99% after precipitation with oxalic acid and ensuring the reusability of DES for further three consecutive cycles.

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Section: Resultssupporting

confidence: 69%

Section: ■ Results and Discussionmentioning

confidence: 99%

Beyond the Conventional Leaching: Exploring Pyruvic Acid-Based Deep Eutectic Solvents for Sustainable Recycling of Spent Lithium-Ion Battery Cathode Material

Chenthamara,

Gardas

2024

ACS Sustainable Chem. Eng.

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“…The qualitative level shown by crab shell waste chitosan and shrimp shell waste chitosan meets the requirements. A substance is declared qualitatively similar if the substance has a qualitative level not less than 90% [22].…”

Section: Discussionmentioning

confidence: 99%

Comparison of Chitosan From Crab Shell Waste and Shrimp Shell Waste as Natural Adsorbent Against Heavy Metals and Dyes

et al. 2022

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Objective: Crustacean shell waste is not currently used to its full potential. Most waste from crustaceans used in food pollutes the environment. Widely found in crab shell waste and shrimp shell waste, chitosan is a modification of chitin compounds. This study aims to utilize crustacean shell waste (crab shell waste and shrimp shell waste) as a natural adsorbent against heavy metals and dyes in the form of chitosan. Methods: This study includes the steps of extracting chitosan from crab shell waste and shrimp shell waste, followed by adsorption capacity tests against heavy metals (mercury and arsenic) and dyes (tartrazine and amaranth). Results: Chitosan sourced from both crab shell waste and shrimp shell waste met the physical and chemical characteristic requirements, and the yield was 28.19% and 18.33%, respectively. The adsorption capacity against heavy metals and dyes from crab shell waste chitosan ranged from 43.4% to 55.6% and the shrimp shell waste chitosan ranged from 50.8% to 60.2%. Conclusion: Crustacean shell waste can be processed into chitosan, which is valuable and can be used as a natural adsorbent against heavy metals and dyes for wastewater treatment in several industrial sectors.

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Treatment of Pyrolytic Eco-toilet Waste: Characterization of Feces-Based Biochar Produced from Different Temperatures and Their Effects on Urine Properties and Fractions

Jiang

He²,

Song³

et al. 2023

Water Air Soil Pollut

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Cost-effective FTIR and 1H NMR spectrometry used to screen valuable molecules extracted from selected West African trees by a sustainable biochar process

Cited by 7 publications

References 14 publications

Beyond the Conventional Leaching: Exploring Pyruvic Acid-Based Deep Eutectic Solvents for Sustainable Recycling of Spent Lithium-Ion Battery Cathode Material

Beyond the Conventional Leaching: Exploring Pyruvic Acid-Based Deep Eutectic Solvents for Sustainable Recycling of Spent Lithium-Ion Battery Cathode Material

Comparison of Chitosan From Crab Shell Waste and Shrimp Shell Waste as Natural Adsorbent Against Heavy Metals and Dyes

Treatment of Pyrolytic Eco-toilet Waste: Characterization of Feces-Based Biochar Produced from Different Temperatures and Their Effects on Urine Properties and Fractions

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