Resources, conservation & recycling advances最新文献_第7页

Recycling rare earth metals from luminescent fibers by solvent extraction 溶剂萃取法回收发光纤维中的稀土金属

IF 5.4 Q1 ENVIRONMENTAL SCIENCES

Resources, conservation & recycling advances

Pub Date : 2025-02-06 DOI: 10.1016/j.rcradv.2025.200251

Agata Szczeszak , Ayush Agarwal , Laura Torrent , Albert J. Schuler , Tomasz Grzyb , Dominika Przybylska , Christian Ludwig , Ajay B. Patil

Rare earth elements (REEs) are known for their specialized optical and electronic properties that have led to their use in a wide range of applications, such as luminescent fibers employed in security papers (e.g., bank notes). Most of the security documents are disposed at the end of their life, losing the raw materials. Considering REEs are listed as critical raw materials, adoption of sustainable recycling and circular economy practices are imperative for ensuring supply chains in the future and aligning with United Nations sustainable development goals. In this contribution, a recycling method consisting of leaching and solvent extraction-based separation for recovering REEs from luminescent fibers is presented. An optimization of the separation method for extracting the metals of interest (Er, Y, La, Gd, Yb, Ho, Tm, Tb, and Eu) was carried out by assessing selective extractants (di-(2-ethylhexyl) phosphoric acid (HDEHP) and N-methyl-N,N,N-trioctylammonium chloride (Al336)), the ligand concentration and the acid concentration. The former showed high selectivity and extractive performance for most of the heavy REEs (>95 %) by using the HDEHP ligand (1.0 mol/L) and adjusting the acid concentration of the aqueous solution at 0.01 mol/L with hydrochloric acid. The developed extractive metallurgy process was applied to doped REE cellulose fibers after performing a digestion, showing impressive extraction profiles in most cases (>80 %). The solvent separation method presented in this work can be employed for other classes of doped fibers after a proper optimization process and can make security fiber industry circular with its resources use.

稀土元素（ree）以其特殊的光学和电子特性而闻名，这使得它们在广泛的应用中得到了应用，例如用于防伪纸（例如，纸币）的发光纤维。大多数安全文件在其使用寿命结束时被处理掉，失去了原材料。考虑到稀土元素被列为关键原材料，采用可持续回收和循环经济实践对于确保未来的供应链并与联合国可持续发展目标保持一致至关重要。本文提出了一种由浸出和溶剂萃取分离组成的从发光纤维中回收稀土元素的回收方法。通过对选择性萃取剂（二-（2-乙基己基）磷酸（HDEHP）和N-甲基-N，N，N-三辛基氯化铵（Al336））、配体浓度和酸浓度的评价，对提取目的金属（Er， Y, La, Gd, Yb, Ho, Tm， Tb和Eu）的分离方法进行了优化。前者采用HDEHP配体（1.0 mol/L）和盐酸调节水溶液的酸浓度为0.01 mol/L，对大多数重稀土元素（> 95%）具有较高的选择性和萃取性能。在进行消化后，将开发的萃取冶金工艺应用于掺杂稀土纤维素纤维，在大多数情况下显示出令人印象深刻的萃取曲线（> 80%）。本研究提出的溶剂分离方法经过适当的优化处理，可用于其他类型的掺杂纤维，并可使安全纤维工业实现资源循环利用。

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引用次数: 0

Critical materials and manufacturing: Comparing China, the European Union, Japan, and the United States 关键材料和制造业：比较中国、欧盟、日本和美国

IF 5.4 Q1 ENVIRONMENTAL SCIENCES

Resources, conservation & recycling advances

Pub Date : 2025-01-27 DOI: 10.1016/j.rcradv.2025.200250

Sangita Gayatri Kannan , Maxwell Fleming , Jusse Hirwa , Emilio Castillo , Roderick Eggert

Manufacturers worldwide depend on supply chains for raw material inputs and intermediate products, with varying importance and risk levels across countries and supply chain stages. Understanding these variations is essential for developing strategies to mitigate supply chain vulnerabilities. This study adds a geographic dimension to the existing criticality assessment framework by simultaneously comparing material criticality in China, the European Union (EU), Japan, and the United States (US). It assesses supply chain risk (two stages: mining, processing) and economic importance for twelve materials representing infrastructure, battery, specialty, and other materials. Our analysis reveals distinct regional differences: China faces greater supply risk at the mining stage, primarily due to its reliance on imported raw materials for certain minerals, while the United States experiences higher supply risk at the processing stage, stemming from limited domestic processing capabilities. The EU and Japan exhibit higher supply risks overall than both the US and China, largely because of limited domestic production capacities. Japan has the highest number of materials—eight out of twelve—with both high supply risk and economic importance. Materials with the greatest difference in criticality among regions are rare-earths and aluminum at the processing stage, where processing bottlenecks and concentration of processing facilities heighten supply risks, and lithium, nickel, and cobalt at the mining stage, due to geographic concentration of mining activities and rising demand driven by battery production. These findings highlight the necessity for region-specific strategies to address supply chain risks, such as diversifying import sources, investing in mining/processing infrastructure, and stockpiling.

世界各地的制造商依赖于原材料投入和中间产品的供应链，不同国家和供应链阶段的重要性和风险水平各不相同。了解这些变化对于制定减轻供应链脆弱性的战略至关重要。本研究通过同时比较中国、欧盟（EU）、日本和美国的材料临界性，为现有的临界性评估框架增加了地理维度。它评估了12种材料的供应链风险（两个阶段：采矿、加工）和经济重要性，这些材料包括基础设施、电池、特种材料和其他材料。我们的分析显示了明显的区域差异：中国在采矿阶段面临更大的供应风险，主要是由于某些矿物依赖进口原材料，而美国在加工阶段面临更高的供应风险，这是由于国内加工能力有限。总体而言，欧盟和日本的供应风险高于美国和中国，这在很大程度上是因为国内生产能力有限。日本拥有最多的稀土原料——12种中有8种——供应风险和经济重要性都很高。区域间临界差异最大的材料是处于加工阶段的稀土和铝，加工瓶颈和加工设施的集中加剧了供应风险；以及处于采矿阶段的锂、镍和钴，这是由于采矿活动的地理集中和电池生产推动的需求上升。这些研究结果突出表明，有必要制定针对特定区域的战略来应对供应链风险，例如使进口来源多样化、投资于采矿/加工基础设施以及储备。

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引用次数: 0

Exploring a nexus among green behavior and environmental sustainability: A systematic literature review and avenues for future research 探索绿色行为与环境可持续性之间的联系：系统的文献综述和未来研究的途径

IF 5.4 Q1 ENVIRONMENTAL SCIENCES

Resources, conservation & recycling advances

Pub Date : 2025-01-18 DOI: 10.1016/j.rcradv.2025.200249

Noor Islam Jasim , Saraswathy Shamini Gunasekaran , Mohammed A. Al-Sharafi , Muhammed Ibrahim , Abba Hassan , Moamin A. Mahmoud , Adnan Bakather

To systematically review and synthesize research on green behavior, examining its theoretical foundations, influencing factors, and broader implications for environmental sustainability, a systematic literature review was conducted following PRISMA guidelines, utilizing Scopus and Web of Science databases. The search yielded 130 studies, with 88 meeting the inclusion criteria based on factors like language, peer-review status, theoretical framework, and relevance. The objective is to encapsulate the diversity of theoretical frameworks, methodologies, and empirical findings that define this vibrant area of research. The review delineates the significant surge in scholarly attention towards green behavior, highlighting its emergent role in promoting sustainable environmental practices across various sectors. It provides a nuanced understanding of the drivers, barriers, and outcomes associated with adopting green behaviors, underscoring the complexity of navigating toward sustainability. The analysis reveals a predominant reliance on quantitative methods to explore the phenomena while pointing out the relative scarcity of studies addressing the socioeconomic dimensions underpinning green behavior. This paper identifies critical gaps by offering a holistic view of the academic landscape. It suggests avenues for future research, particularly the need for an integrated approach encompassing environmental, social, and economic considerations. In doing so, it aims to contribute to a more comprehensive discourse on sustainable practices, encouraging multidisciplinary collaborations to address the multifaceted challenges of environmental sustainability.

为了系统回顾和综合有关绿色行为的研究，考察其理论基础、影响因素及其对环境可持续性的广泛影响，本文根据PRISMA的指导方针，利用Scopus和Web of Science数据库进行了系统的文献综述。搜索产生了130项研究，其中88项符合基于语言、同行评议状态、理论框架和相关性等因素的纳入标准。目的是概括定义这个充满活力的研究领域的理论框架、方法和实证研究结果的多样性。该评论描述了对绿色行为的学术关注的显著激增，强调了其在促进各个部门的可持续环境实践方面的新兴作用。它提供了与采用绿色行为相关的驱动因素、障碍和结果的细致理解，强调了走向可持续发展的复杂性。该分析揭示了主要依赖定量方法来探索这一现象，同时指出解决支撑绿色行为的社会经济维度的研究相对稀缺。本文通过提供学术景观的整体视图来确定关键的差距。它提出了未来研究的途径，特别是需要一种综合的方法，包括环境、社会和经济方面的考虑。在此过程中，它旨在促进对可持续实践的更全面的论述，鼓励多学科合作，以应对环境可持续性的多方面挑战。

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引用次数: 0

Assessing the sustainability performances of the supply chain of decentralized urban food waste composting for urban green spaces 城市绿地分散式城市食物垃圾堆肥供应链的可持续性绩效评估

IF 5.4 Q1 ENVIRONMENTAL SCIENCES

Resources, conservation & recycling advances

Pub Date : 2025-01-11 DOI: 10.1016/j.rcradv.2025.200245

Wenrui Shen , Haoran Qiao , Xin Tong , Yilong Xiao , Ling Han

To address challenges of municipal food waste (FW) treatment and urban green space (UGS) soil simultaneously, this study proposes the "Residential FW - Decentralized Composting - Application to UGS" (DCUGS) supply chain and assess its sustainability performances. A Mixed-Integer Linear Programming model integrated with GIS (Geo-Information System) at a fine-scale was set up to simulate this conceptual chain in Haidian, Beijing. The sustainability performance of the supply chain is then assessed across economic, environmental, and social dimensions. The results indicated that compost fulfills 61% of residential and 12% of park green space fertilizer needs, with 51% of FW processed locally. Compared to centralized FW management, DCUGS costs 254.21 CNY/ton, 18.04% of centralized treatment costs, mainly due to reduced transportation. Carbon footprint (CF) analysis indicates DCUGS also achieves a carbon reduction of 64.11 kg CO_2e/ton, surpassing mainstream Chinese FW management. A hedonic model reveals that the increase in residents’ welfare from enhanced greenery outweighs the space occupied by composting facilities. All results show this chain exhibits superior sustainability across three dimensions and may provide a sustainable and preferable choice for the resourceful treatment of FW in Chinese cities.

为了同时解决城市食物垃圾（FW）处理和城市绿地（UGS）土壤的挑战，本研究提出了“住宅食物垃圾-分散堆肥-应用于UGS”（DCUGS）供应链，并评估其可持续性绩效。以北京海淀区为例，建立了一个与GIS （Geo-Information System）相结合的精细尺度混合整数线性规划模型来模拟这一概念链。然后从经济、环境和社会三个方面对供应链的可持续性绩效进行评估。结果表明，堆肥满足了61%的住宅和12%的公园绿地肥料需求，其中51%的FW在当地处理。与FW集中管理相比，DCUGS成本为254.21元/吨，为集中处理成本的18.04%，主要原因是运输减少。碳足迹（CF）分析表明，DCUGS还实现了64.11 kg CO2e/吨的碳减排，超过了中国主流FW管理。一个享乐模型显示，增强绿化带来的居民福利的增加超过了堆肥设施所占用的空间。研究结果表明，该链条在三个维度上具有良好的可持续性，可以为中国城市FW的资源化治理提供可持续的、较好的选择。

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引用次数: 0

Beneficial use of sludge from water treatment plants as a multiple resource: Potential and limitations 水处理厂污泥作为一种多种资源的有益利用：潜力和局限性

IF 5.4 Q1 ENVIRONMENTAL SCIENCES

Resources, conservation & recycling advances

Pub Date : 2025-01-10 DOI: 10.1016/j.rcradv.2025.200247

Gabriela Nakayama Messa, Amanda Maria Dantas de Jesus, Fabiana Alves Fiore

The increasing and continuous generation of water treatment plant sludge (WTPS) is still an under-recognised problem, although in most countries the inappropriate disposal of WTPS into watercourses has a negative impact on the environment. The need to incorporate circular economic principles in the management of this waste has stimulated studies on the reintroduction of WTPS into the production chain, but these investigations generally evaluate specific processes. The aim of this research was to identify the potential and limitations of WTPS reuse. Therefore, a systematic literature review was carried out using the archival search method, which resulted in the analysis of 106 selected articles. The results show that the beneficial use of WTPS in the manufacture of construction products and as inputs for chemical processes are the most studied applications. This can be explained by sludge's composition that consists of more than 80% by mass of the elements: silicon, aluminum, iron and calcium. It should be noted that the predominance of these elements is related to the type of input used in water purification and the characteristics of the raw water collected. The mineralogical composition of WTPS is seasonally predominated by quartz and kaolinite. These residues also contain heavy metals especially such as barium, chrome, lead and mercury, and microorganisms such as proteobacteria, firmicutes and cyanobacteria, presenting potential risks to human health and the environment, and demanding special care in the management and beneficial uses. The lack of standardization and studies that address environmental and economic viability are research gaps in this area.

水处理厂污泥的不断增加和不断产生仍然是一个未得到充分认识的问题，尽管在大多数国家，将水处理厂污泥不当处置到水道中对环境产生了负面影响。需要将循环经济原则纳入这种废物的管理，这刺激了关于将WTPS重新引入生产链的研究，但这些调查一般评价具体过程。本研究的目的是确定WTPS重用的潜力和局限性。因此，我们采用文献检索法进行了系统的文献综述，筛选出106篇文章进行分析。研究结果表明，WTPS在建筑产品制造和化学工艺投入中的有益利用是研究最多的应用。这可以用污泥的成分来解释，它由超过80%的元素组成：硅、铝、铁和钙。应该指出的是，这些因素的优势与水净化中使用的投入类型和收集的原水的特性有关。WTPS的矿物组成以石英和高岭石为主。这些残留物还含有重金属，特别是钡、铬、铅和汞，以及变形菌门、厚壁菌门和蓝藻门等微生物，对人类健康和环境构成潜在风险，在管理和有益利用方面需要特别小心。缺乏标准化和研究解决环境和经济可行性是这一领域的研究空白。

{"title":"Beneficial use of sludge from water treatment plants as a multiple resource: Potential and limitations","authors":"Gabriela Nakayama Messa, Amanda Maria Dantas de Jesus, Fabiana Alves Fiore","doi":"10.1016/j.rcradv.2025.200247","DOIUrl":"10.1016/j.rcradv.2025.200247","url":null,"abstract":"<div><div>The increasing and continuous generation of water treatment plant sludge (WTPS) is still an under-recognised problem, although in most countries the inappropriate disposal of WTPS into watercourses has a negative impact on the environment. The need to incorporate circular economic principles in the management of this waste has stimulated studies on the reintroduction of WTPS into the production chain, but these investigations generally evaluate specific processes. The aim of this research was to identify the potential and limitations of WTPS reuse. Therefore, a systematic literature review was carried out using the archival search method, which resulted in the analysis of 106 selected articles. The results show that the beneficial use of WTPS in the manufacture of construction products and as inputs for chemical processes are the most studied applications. This can be explained by sludge's composition that consists of more than 80% by mass of the elements: silicon, aluminum, iron and calcium. It should be noted that the predominance of these elements is related to the type of input used in water purification and the characteristics of the raw water collected. The mineralogical composition of WTPS is seasonally predominated by quartz and kaolinite. These residues also contain heavy metals especially such as barium, chrome, lead and mercury, and microorganisms such as proteobacteria, firmicutes and cyanobacteria, presenting potential risks to human health and the environment, and demanding special care in the management and beneficial uses. The lack of standardization and studies that address environmental and economic viability are research gaps in this area.</div></div>","PeriodicalId":74689,"journal":{"name":"Resources, conservation & recycling advances","volume":"25 ","pages":"Article 200247"},"PeriodicalIF":5.4,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143092505","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

Role of training in changing designers’ attitudes and behaviour in optimal use of products with recycled content in the construction sector: A systematic literature review 培训在改变设计师的态度和行为的作用，在建筑部门与回收内容的产品的最佳使用：系统的文献综述

IF 5.4 Q1 ENVIRONMENTAL SCIENCES

Resources, conservation & recycling advances

Pub Date : 2025-01-09 DOI: 10.1016/j.rcradv.2025.200248

Chamari Jayarathna , Tim Ryley , Savindi Caldera , Salman Shooshtarian , Peter SP Wong , Atiq Zaman , Ana Maria Caceres Ruiz

Optimal use of products with recycled content (PwRC) has emerged as a targeted strategy to reduce construction and demolition (C&D) waste disposal and promote resource circularity in the building and construction sector. Within this context, the role of training in changing project designers’ attitudes and behaviour towards the use of PwRC is poorly investigated on a global scale. Hence, this study aims to develop a framework that shows how training can influence project designers’ attitudes and behaviour towards the optimal use of PwRC through two research questions: (a) what are the factors that influence to change the attitude and behaviour, (b) what are the existing theories and models that support the attitudes and behavioural changes, using a systematic literature review. The review found that changing attitudes and behaviour towards the optimal use of PwRC is influenced by psychological factors, although economic and sociological factors do also have an impact. Of these psychological factors, attitude, knowledge, perceived behaviour control, and subjective norms are more frequently examined. From the economic factors, economic benefits and from sociological factors, collaboration and communication are the primary considerations. The review also suggests that the theory of Planned Behaviour and the Extended Theory of Planned Behaviour are the most widely used theories in this respect. This study contributes to the knowledge development by proposing a seven-element training framework aiming to influence project designers’ attitudes and behavioural change towards the optimal use of PwRC. This is a foundation for further research on circular economy education for construction project designers.

优化使用含有可回收成分的产品（PwRC）已成为减少建筑和拆除（C&；D）废物处置和促进建筑行业资源循环的有针对性的策略。在这种情况下，培训在改变项目设计者对使用PwRC的态度和行为方面的作用在全球范围内的调查很少。因此，本研究旨在通过两个研究问题建立一个框架，表明培训如何影响项目设计师对PwRC最佳使用的态度和行为：(a)影响改变态度和行为的因素是什么，(b)支持态度和行为改变的现有理论和模型是什么，使用系统的文献综述。审查发现，对PwRC最佳利用的态度和行为的改变受到心理因素的影响，尽管经济和社会因素也有影响。在这些心理因素中，态度、知识、感知行为控制和主观规范更常被检查。从经济因素、经济效益和社会因素来看，协作和沟通是首要考虑的因素。综述还表明，计划行为理论和扩展计划行为理论是这方面应用最广泛的理论。本研究提出了一个七要素培训框架，旨在影响项目设计者对PwRC最佳利用的态度和行为改变，从而有助于知识的发展。这为建筑工程设计人员循环经济教育的进一步研究奠定了基础。

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引用次数: 0

Upcycling of medium-density fiberboard and polyurethane foam wastes into novel composite materials 中密度纤维板和聚氨酯泡沫废材料的升级利用

IF 5.4 Q1 ENVIRONMENTAL SCIENCES

Resources, conservation & recycling advances

Pub Date : 2025-01-09 DOI: 10.1016/j.rcradv.2025.200244

Aleksander Hejna , Mateusz Barczewski , Joanna Aniśko , Adam Piasecki , Roman Barczewski , Paulina Kosmela , Jacek Andrzejewski , Marek Szostak

While plastic and e-waste dominate public discourse, municipal waste, particularly bulky wastes pose a significant challenge due to their large-scale generation aligning with the enrichment of society. Their efficient collection and keeping in a loop should be considered among the priorities of municipal waste management. Herein, the presented work presents novel composite materials obtained from flexible polyurethane foams used as mattresses and medium-density fiberboards applied in furniture products. Composites have been prepared using compression molding, with the addition of an innovative binder composed of a diisocyanate and inorganic salt, whose in situ decomposition led to the gas generation providing the porous structure and strengthening the interfacial bonding inside the material. The impact of changes induced by the chemical interactions on the appearance, morphology, mechanical, thermal, acoustic and insulation performance of composites has been evaluated. Observed changes pointed to the auspicious conclusions on the further applications of the examined binder composition.

虽然塑料和电子垃圾主导着公共话语，但城市垃圾，特别是大件垃圾，由于其大规模产生与社会的富裕相一致，构成了重大挑战。它们的有效收集和循环应被视为城市废物管理的优先事项之一。本文介绍了一种新型的复合材料，这种复合材料是从用作床垫的柔性聚氨酯泡沫和用于家具产品的中密度纤维板中获得的。复合材料采用压缩成型制备，添加了一种由二异氰酸酯和无机盐组成的创新粘合剂，其原位分解导致气体生成，提供了多孔结构并加强了材料内部的界面结合。评价了化学相互作用引起的变化对复合材料的外观、形态、力学、热、声和绝缘性能的影响。观察到的变化指出了对所检查的粘合剂组成的进一步应用的吉祥结论。

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引用次数: 0

Sustainable and low-cost protic ionic liquid-based recovery of oil from agricultural wastes “date pits” for biofuel production 可持续和低成本的以质子离子液体为基础的从农业废弃物“枣坑”中回收油用于生物燃料生产

IF 5.4 Q1 ENVIRONMENTAL SCIENCES

Resources, conservation & recycling advances

Pub Date : 2025-01-08 DOI: 10.1016/j.rcradv.2025.200246

Mohammed Talhami , Abdurahman Hafez Mohammed Kashem , Kenan A. Alkhamri , Omar Albatarni , Mahmoud Ibrahim Thaher , Probir Das , Maryam AL-Ejji , Alaa H. Hawari

Several studies revealed that date pits, often regarded as agro-industrial waste, possess the potential to be upgraded to value-added products like biofuels. Yet, the majority of the oil extraction studies from date pits relied on the use of environmentally harmful organic solvents which are highly flammable and toxic. Thus, for the first time, this paper is aimed at developing a cost-effective, green, and novel technology for the extraction of oil from date pits using protic ionic liquids. The date pits of eight distinct varieties were structurally characterized, determining their composition of oil (7.6–10.9%), carbohydrates (80.8–84.6%), protein (4.8–8.8%), and ash (1.1–1.7%) based on dry biomass. The quality of oil across these date pits was found to be comparatively similar and well-suited for biofuel production, with oleic, lauric, myristic, and palmitic acid being the most abundant constituents. The screening of six unique protic ionic liquids indicated that Triethylammonium dihydrogen phosphate [TEA][H₂PO₄] exhibited the highest oil extraction of 91.3 mg/g biomass (84% of total oil) from Majdool dates. The investigation of process parameters disclosed that temperature significantly affected oil extraction performance, whereas the reaction duration's impact was found to be minor. The recycling and reuse of [TEA][H₂PO₄] for the extraction of oil from Majdool date seeds throughout four cycles were promising in terms of performance stability, thereby promoting process viability. The outcomes obtained through this study endorse the capacity of low-cost protic ionic liquids to efficiently extract oil from date pits, presenting a viable alternative to toxic organic solvents in this context.

几项研究表明，通常被视为农业工业废物的枣核具有升级为生物燃料等增值产品的潜力。然而，大多数从枣坑中提取油的研究依赖于使用对环境有害的有机溶剂，这些溶剂高度易燃和有毒。因此，本文旨在首次开发一种经济、绿色、新颖的利用质子离子液体从枣核中提取油的技术。对8个不同品种的枣核进行了结构表征，确定了枣核的干生物量组成，分别为油脂（7.6 ~ 10.9%）、碳水化合物（80.8 ~ 84.6%）、蛋白质（4.8 ~ 8.8%）和灰分（1.1 ~ 1.7%）。研究发现，这些枣核上的油质量比较相似，非常适合用于生物燃料生产，其中油酸、月桂酸、肉豆蔻酸和棕榈酸是最丰富的成分。对6种独特的质子离子液体的筛选表明，磷酸二氢三乙基铵[TEA][H2PO4]的提取率最高，为91.3 mg/g生物质（占总油的84%）。工艺参数的研究表明，温度对萃取性能有显著影响，而反应时间对萃取性能的影响较小。[TEA][H2PO4]的回收和再利用在四个循环中从Majdool枣籽中提取油，就性能稳定性而言是有希望的，从而提高了工艺的可行性。本研究的结果表明，低成本的质子离子液体能够有效地从枣核中提取油，在这种情况下，提供了一种可行的替代有毒有机溶剂的方法。

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引用次数: 0

Agricultural residues to high-value nanomaterials: Pathways to sustainability 农业残留物到高价值纳米材料：通往可持续性的途径

IF 5.4 Q1 ENVIRONMENTAL SCIENCES

Resources, conservation & recycling advances

Pub Date : 2025-01-02 DOI: 10.1016/j.rcradv.2025.200243

Kelvin Adrian Sanoja-López , Jeffrey Saúl Cedeño-Muñoz , Bryan Fernando Rivadeneira-Mendoza , Arnaldo Vergara-Romero , Rafael Luque , Joan Manuel Rodríguez-Díaz

Agriculture plays an essential role in sustaining society, yet the substantial waste produced during agricultural processes presents a major challenge for waste management. Often, agricultural waste is simply burned, posing environmental concerns. To address these issues, the revalorisation of agricultural waste by converting it into high-value nanomaterials offers a promising approach. This work reviews recent advances in the synthesis of nanomaterials from agricultural waste, focusing on materials such as carbonaceous compounds, metal-organic frameworks (MOFs), polymers, and silica-based nanomaterials. It also explores their applications in key sectors, including agriculture, water treatment, and medicine. A feasibility analysis assessed both economic viability and environmental impact, demonstrating that polymeric, carbon-based, and siliceous nanomaterials are particularly cost-effective and environmentally beneficial. This revalorization process not only generates commercially valuable nanomaterials but also promotes sustainable waste management practices. The study underscores the significant potential of agricultural waste as a resource for producing nanomaterials, aligning with both waste reduction and the generation of marketable products.

农业在维持社会方面发挥着至关重要的作用，但农业过程中产生的大量废物对废物管理提出了重大挑战。农业废弃物通常被直接焚烧，造成了环境问题。为了解决这些问题，通过将农业废物转化为高价值纳米材料来重新利用它们提供了一种很有前途的方法。本文综述了从农业废弃物中合成纳米材料的最新进展，重点介绍了碳质化合物、金属有机框架、聚合物和硅基纳米材料等材料。它还探讨了它们在关键部门的应用，包括农业、水处理和医药。可行性分析评估了经济可行性和环境影响，表明聚合物、碳基和硅质纳米材料特别具有成本效益和环境效益。这种再增值过程不仅产生了具有商业价值的纳米材料，而且还促进了可持续的废物管理实践。这项研究强调了农业废弃物作为一种生产纳米材料的资源的巨大潜力，这与减少废弃物和生产适销对路的产品相一致。

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引用次数: 0

Biochar in cementitious composites: A comprehensive review of properties, compatibility, and prospect of use in sustainable geopolymer concrete 生物炭在胶凝复合材料中的应用：性能、相容性及其在可持续地聚合物混凝土中的应用前景的综合综述

IF 5.4 Q1 ENVIRONMENTAL SCIENCES

Resources, conservation & recycling advances

Pub Date : 2024-12-18 DOI: 10.1016/j.rcradv.2024.200242

Seemab Tayyab , Wahid Ferdous , Weena Lokuge , Rafat Siddique , Allan Manalo

Geopolymer concrete (GPC) finds great potential in reducing global warming emissions from the construction sector. The conventional GPC precursor binders (fly ash, slag, metakaolin, silica fume, etc.) and alkaline activators are expensive, pollution-causing, and insufficient to meet the global requirement of concrete. Biochar (BC), agricultural waste produced through pyrolysis has rapidly been employed in cementitious composites since last decade because of its low cost, low carbon footprint, and ecological advantages. This paper presents a detailed review of the compatibility of BC with GPC, the properties (physical, chemical, and mechanical) in cementitious composites, and the chemical suitability of BC with GPC. The physical and chemical properties of BC can be controlled and highly depend on its production method (temperature, pressure, heating rate, resident time). The BC rich in silica and alumina is a feasible alternative to the solid precursor in geopolymer composites by controlling the particle size and mix design. The formation of a highly alkaline BC with water ensured its compatibility as an alkaline activator solution. They revealed comparable strength to GPC produced using conventional activators. Future studies are needed to investigate BC's experimental and practical applications as a precursor and alkaline activator in geopolymer composites.

地聚合物混凝土（GPC）在减少建筑行业的全球变暖排放方面具有巨大潜力。传统的GPC前驱体粘结剂（粉煤灰、矿渣、偏高岭土、硅灰等）和碱性活化剂价格昂贵、污染严重，不能满足混凝土的全球要求。生物炭（BC）是一种通过热解产生的农业废弃物，由于其低成本、低碳足迹和生态优势，在近十年来迅速应用于胶凝复合材料。本文详细介绍了BC与GPC的相容性，胶结复合材料的物理、化学和力学性能，以及BC与GPC的化学适应性。BC的物理和化学性质是可以控制的，并且高度依赖于它的生产方法（温度、压力、加热速率、停留时间）。通过控制颗粒大小和配比设计，富含二氧化硅和氧化铝的BC可以替代固体前驱体用于地聚合物复合材料中。高碱性BC与水的形成保证了其作为碱性活化剂溶液的相容性。他们揭示了与使用传统活化剂生产的GPC相当的强度。BC在地聚合物复合材料中作为前驱体和碱性活化剂的实验和实际应用有待进一步研究。

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