Sustainable Chemistry for the Environment最新文献_第10页

Electrochemical and theoretical studies of 1-(pyridyl-2-azo)-naphthol-2 for control of corrosion of mild steel under H2SO4 environment 1-（吡啶基-2-偶氮）萘酚-2控制H2SO4环境下低碳钢腐蚀的电化学和理论研究

Sustainable Chemistry for the Environment Pub Date : 2024-12-26 DOI: 10.1016/j.scenv.2024.100202

Rajni Kanojia , Sunita Hooda , Bipasa Arya , Amal Joshy , Neeti Misra , Himanshu , M. Ramananda Singh , Shramila Yadav , Sangeeta Kaul , Neelu Dheer

{"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}

引用次数: 0

The potential of microbial fuel cell for converting waste to energy: An overview 微生物燃料电池在废物转化为能源方面的潜力综述

Sustainable Chemistry for the Environment Pub Date : 2024-12-25 DOI: 10.1016/j.scenv.2024.100196

Ritesh Ojha, Debabrata Pradhan

{"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}

引用次数: 0

Development and characterization of gelatin-starch bioplastics: A comparative study of cassava, corn, and rice-based alternatives 明胶淀粉生物塑料的开发和表征：木薯、玉米和水稻基替代品的比较研究

Sustainable Chemistry for the Environment Pub Date : 2024-12-25 DOI: 10.1016/j.scenv.2024.100190

Uvin Thavisha Jayalath , Himali Samaraweera , Amal Samarasinghe

{"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}

引用次数: 0

Delineating the role of rhizospheric microbes in the amelioration of hexavalent chromium stress in plants 描述根际微生物在改善植物六价铬胁迫中的作用

Sustainable Chemistry for the Environment Pub Date : 2024-12-24 DOI: 10.1016/j.scenv.2024.100198

Satyabrata Nanda , Satabdi Tripathy , Pratyush Kumar Das

{"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}

引用次数: 0

Cu2O nanocrystals: Unveiling facet-dependent catalysis in phenylacetylene homocoupling Cu2O纳米晶体：揭示苯乙炔均偶联的面依赖催化作用

Sustainable Chemistry for the Environment Pub Date : 2024-12-24 DOI: 10.1016/j.scenv.2024.100200

Satyaranjan Jena , Arnab Ghosh , Novuhulu Rhakho , Ramesh B. Dateer , Akshaya K. Samal

{"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}

引用次数: 0

Unravelling the impact of lignin particle size and content on enhanced value in plastic composites 揭示木质素颗粒大小和含量对塑料复合材料增强值的影响

Sustainable Chemistry for the Environment Pub Date : 2024-12-21 DOI: 10.1016/j.scenv.2024.100194

Zoi Terzopoulou , Christina Pappa , Konstantinos Triantafyllidis , Dimitrios N. Bikiaris

{"title":"Unravelling the impact of lignin particle size and content on enhanced value in plastic composites","authors":"Zoi Terzopoulou , Christina Pappa , Konstantinos Triantafyllidis , Dimitrios N. Bikiaris","doi":"10.1016/j.scenv.2024.100194","DOIUrl":"10.1016/j.scenv.2024.100194","url":null,"abstract":"<div><div>The shift towards a sustainable plastics economy is driving interest in agricultural waste and byproducts for plastic composites, offering benefits like enhanced sustainability, reduced costs, and improved mechanical properties. Lignin, one of the three main components of lignocellulosic biomass, is a promising filler for polymer composites due to its abundance, reactivity, and functional properties, despite challenges in extraction and processing. This review examines the impact of lignin particle size reduction, from microparticles (LMPs) to nanoparticles (LNPs), on the properties of polymer composites, focusing on poly(lactic acid) (PLA) and other polyesters. Reducing lignin particle size can enhance stress transfer and particle wetting in the matrix, although optimal size thresholds and filler contents for desired properties remain uncertain. The paper discusses lignin's characteristics based on source and size reduction method, its functionalization for better dispersion, and various preparation methods of lignin-containing composites. Applications in packaging and are agriculture are highlighted, with an emphasis on achieving a balance between improved properties, cost efficiency, and environmental impact. Finally, it highlights the need for standardized reporting on lignin’s origin, isolation method, molecular weight, T<sub>g</sub>, and particle size to enable effective comparisons and advancements in lignin-based polymer composites.</div></div>","PeriodicalId":101196,"journal":{"name":"Sustainable Chemistry for the Environment","volume":"9 ","pages":"Article 100194"},"PeriodicalIF":0.0,"publicationDate":"2024-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143177728","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}

引用次数: 0

Cross-bridging green chemistry education and environmental chemistry education 搭建绿色化学教育与环境化学教育的桥梁

Sustainable Chemistry for the Environment Pub Date : 2024-12-21 DOI: 10.1016/j.scenv.2024.100195

Liliana Mammino

{"title":"Cross-bridging green chemistry education and environmental chemistry education","authors":"Liliana Mammino","doi":"10.1016/j.scenv.2024.100195","DOIUrl":"10.1016/j.scenv.2024.100195","url":null,"abstract":"<div><div>Green chemistry education has been the object of intensive attention, research and explorations in the last decades; environmental chemistry education has received alternating attention. Both green chemistry and environmental chemistry are concerned with the environment. Green chemistry focuses on pollution prevention at the source, to be pursued through changes in the production and handling of substances, as well as the nature of substances themselves, by envisaging the replacement of non-benign substances by more benign ones. Environmental chemistry focuses on the effects of pollutants, thus providing indications on the substances that require more urgent replacement and more effective measures to prevent them from entering the environment. At education level, it is important to acquaint students with the domain of these two areas, their possible synergies and the expected ensuing benefits. The present work outlines collaboration and convergence pathways, considering the green chemistry principles and also the complexity of the implementation features of pollution prevention. It is concluded that an educational approach bridging the two perspectives is crucial to make future chemists, as well as other professionals, more ready for the multidisciplinary requirements of sustainability discourses and their operational components.</div></div>","PeriodicalId":101196,"journal":{"name":"Sustainable Chemistry for the Environment","volume":"9 ","pages":"Article 100195"},"PeriodicalIF":0.0,"publicationDate":"2024-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143177734","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}

引用次数: 0

Methylene blue and indigo blue removal from (waste)water using hexagonal boron nitride nanosheets as adsorbent 六方氮化硼纳米片作为吸附剂去除废水中的亚甲基蓝和靛蓝

Sustainable Chemistry for the Environment Pub Date : 2024-12-18 DOI: 10.1016/j.scenv.2024.100193

N. Vázquez-Canales , J. García-Serrano

{"title":"Methylene blue and indigo blue removal from (waste)water using hexagonal boron nitride nanosheets as adsorbent","authors":"N. Vázquez-Canales , J. García-Serrano","doi":"10.1016/j.scenv.2024.100193","DOIUrl":"10.1016/j.scenv.2024.100193","url":null,"abstract":"<div><div>Boron nitride nanostructures have gained wide-spread attention in the field of organic dyes removal from aqueous solutions owing to their distinctive characteristics, such as a large surface area, hydrophobicity, and thermal/chemical stability. In this work, the removal of methylene blue (MB) cationic dye from aqueous solutions using hexagonal boron nitride nanosheets (h-BNNS) is reported. The h-BNNSs were obtained by liquid phase exfoliation assisted by ultrasonic waves and characterized by TEM, XRD, Raman spectroscopy, particle size analysis by laser diffraction, zeta potential measurements and nitrogen adsorption-desorption isotherms analysis. Whereas, the adsorption study of MB was performed by UV–vis spectroscopy varying the concentration of dye and time contact. UV-Vis results revealed that the h-BNNSs exhibit a very quick adsorption rate for MB in few minutes of contact time and then the process is slow until equilibrium is reached. The h-BNNSs revealed an adsorption capacity of 17.8 mg/g for a dye solution of 30 mg/L, contact time of 25 min, 25 °C and 2 mg of adsorbent. The experimental adsorption equilibrium data were analyzed using the Langmuir, Freundlich, and Temkin isotherm models and the results revealed that the adsorption process is described well with the Langmuir model. The adsorption capacity of the h-BNNSs was attributed to the electrostatic and π - π interactions due to the negatively charged groups on the surface and to the π conjugation in its structure, which allow an effective interaction with positive charge and the aromatic system of the MB molecule. On the other hand, the removal of indigo blue from wastewater was almost 100 % with 15 min of contact time. The results revealed that the h-BNNSs are able to efficiently adsorb indigo blue textile dye from real wastewater.</div></div>","PeriodicalId":101196,"journal":{"name":"Sustainable Chemistry for the Environment","volume":"9 ","pages":"Article 100193"},"PeriodicalIF":0.0,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143178668","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}

引用次数: 0

A comprehensive review of cyclic activated sludge processes in wastewater treatment: Current perspectives and future challenges 循环活性污泥法在废水处理中的综合综述：当前的观点和未来的挑战

Sustainable Chemistry for the Environment Pub Date : 2024-12-17 DOI: 10.1016/j.scenv.2024.100191

Mohammad Mosaferi , Sakine Shekoohiyan , Ali Behnami , Ehsan Aghayani , Khaled Zoroufchi Benis , Houra Allaeaiea , Mojtaba Pourakbar

{"title":"A comprehensive review of cyclic activated sludge processes in wastewater treatment: Current perspectives and future challenges","authors":"Mohammad Mosaferi , Sakine Shekoohiyan , Ali Behnami , Ehsan Aghayani , Khaled Zoroufchi Benis , Houra Allaeaiea , Mojtaba Pourakbar","doi":"10.1016/j.scenv.2024.100191","DOIUrl":"10.1016/j.scenv.2024.100191","url":null,"abstract":"<div><div>Recent advances in biological wastewater treatment have spurred the development of innovative modifications aimed at enhancing both efficiency and sustainability. This review examines recent modifications within cyclic activated processes, categorizing them by metabolic function (anaerobic, aerobic, anoxic, and combined), biomass types (attached and suspended growth), and structural changes made to the systems. Cyclic processes demonstrate key advantages, including improved nutrient removal, reduced energy demands, and greater system stability. Nevertheless, challenges persist in optimizing parameters, scaling technology for industrial use, and managing operational costs. The study also investigates the integration of enzymatic processes with cyclic activated sludge, an approach that could significantly enhance the breakdown of organic contaminants. Such combined processes may offer a transformative solution for organic contaminant degradation in wastewater, warranting further research to support their application on an industrial scale. Overall, the ongoing refinement of cyclic activated sludge processes holds considerable promise for advancing sustainable and efficient water treatment technologies, essential for addressing water pollution and conserving resources.</div></div>","PeriodicalId":101196,"journal":{"name":"Sustainable Chemistry for the Environment","volume":"9 ","pages":"Article 100191"},"PeriodicalIF":0.0,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143178664","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}

引用次数: 0

Thermo-mechanical decolourization process for shrimp chitin (Pandalus borealis) 虾壳质热机械脱色工艺研究

Sustainable Chemistry for the Environment Pub Date : 2024-12-17 DOI: 10.1016/j.scenv.2024.100192

Julia Pohling , Kelly Hawboldt , Deepika Dave

{"title":"Thermo-mechanical decolourization process for shrimp chitin (Pandalus borealis)","authors":"Julia Pohling , Kelly Hawboldt , Deepika Dave","doi":"10.1016/j.scenv.2024.100192","DOIUrl":"10.1016/j.scenv.2024.100192","url":null,"abstract":"<div><div><em>Pandalus borealis</em> is a thin-shelled shrimp species with medium pigmentation. The polysaccharide chitin, which makes up approximately 20 % of the shell, can be extracted and used in many different industries. The main extraction steps are deproteination and demineralization, followed by an assessment of the colour. White, off-white, or beige chitin is desired for most industrial applications. If required, residual pigmentation is typically removed in a decolourization step (DC) using oxidizing reagents or solvents. Disadvantages include safety and environmental concerns, unspecific oxidation reactions and high volatility of reagents. To date, a green process alternative is not documented. <em>P. borealis</em> chitin, deproteinated in alkali solution, does not require further DC. Enzymatic deproteination is nowadays preferred in the interest of sustainable processing, but it produces chitin with inferior colour quality. Based on the known thermal instability of the shrimp pigments and the porosity of chitin particles, the present study hypothesizes that the colour quality of enzymatically purified chitin can be enhanced by a washing process using high-shear and hot water. We develop a novel, chemical-free alternative for decolourization and assess its effectiveness compared to solvent and oxidizing reagents. Chitin properties are assessed by colorimetry, XRD, NMR, TGA, bulk density, and fat/water-binding capacities (FBC/WBC). Our findings suggest that the innovative thermo-mechanical DC process can produce a colour quality comparable to solvent DC without resulting in deacetylation, changes in crystallinity, or thermal stability. Thermo-mechanical DC enhanced WBC/FBC of chitin, which is an important property in hydrogel and drug delivery applications.</div></div>","PeriodicalId":101196,"journal":{"name":"Sustainable Chemistry for the Environment","volume":"9 ","pages":"Article 100192"},"PeriodicalIF":0.0,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143178669","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}

引用次数: 0