Pub Date : 2024-11-22DOI: 10.1016/j.jclepro.2024.144293
Liang Li, Chao-qun Wu, De-xiang Sun, Nan Zhang, Ting Huang, Yong Wang
Azo dye wastewater poses a serious threat to environment and human health due to steady structures make them resistant to biodegradation or chemical degradation. The coupling of photocatalysis and peroxymonosulfate (PMS) as an efficient strategy can achieve dye-contaminated water purification by inducing advance oxidation processes. In this study, magnetic FeCeO nanocrystals with heterojunction between Fe2O3 and CeO2 by one-step method were successfully synthesized to efficiently degrade methyl orange (MO) and Congo red (CR) by activating PMS under visible light irradiation. PMS molecules could be adsorbed by Fe2Ce1O composite and generated radicals during photocatalytic process. Free radical quenching experiments and electron paramagnetic resonance (EPR) revealed that radicals were the dominant species in photodegradation process. Fe2Ce1O catalyst could completely decompose dye molecules for waste solutions with low dye concentration. Increasing MO and CR concentrations to 100 mg L-1, the removal efficiencies of MO and CR by Fe2Ce1O were still up to 85.2% and 77.9% in sequence. And liquid chromatography mass spectrometry (LC-MS) was used to confirm the intermediates and degradation pathways during MO and CR degradation processes. Cyclic experiments demonstrated that Fe2Ce1O composite had good durability and reusability. Moreover, degradation mechanisms were investigated. This study provides new insight into the synthesis of heterogeneous metal oxide catalyst to solve the organic pollution issues.
偶氮染料废水对环境和人类健康构成严重威胁，因为其稳定的结构使其无法被生物降解或化学降解。光催化与过氧化单硫酸盐（PMS）的耦合作为一种有效的策略，可以通过诱导提前氧化过程实现染料污染水的净化。本研究采用一步法成功合成了Fe2O3和CeO2异质结的磁性FeCeO纳米晶体，在可见光照射下通过激活PMS高效降解甲基橙（MO）和刚果红（CR）。PMS 分子可被 Fe2Ce1O 复合材料吸附，并在光催化过程中产生自由基。自由基淬灭实验和电子顺磁共振（EPR）显示，自由基是光降解过程中的主要物种。对于染料浓度较低的废液，Fe2Ce1O 催化剂可以完全分解染料分子。将 MO 和 CR 的浓度提高到 100 mg L-1 后，Fe2Ce1O 对 MO 和 CR 的去除率仍依次高达 85.2% 和 77.9%。液相色谱质谱法（LC-MS）证实了 MO 和 CR 降解过程中的中间产物和降解途径。循环实验表明，Fe2Ce1O 复合材料具有良好的耐久性和可重复使用性。此外，还研究了降解机制。这项研究为合成异质金属氧化物催化剂以解决有机污染问题提供了新的视角。
{"title":"Synthesis of magnetically recyclable FeCeO nanocrystals with heterojunction between Fe2O3 and CeO2 via one-step method toward efficient organic dyes degradation by activating peroxymonosulfate","authors":"Liang Li, Chao-qun Wu, De-xiang Sun, Nan Zhang, Ting Huang, Yong Wang","doi":"10.1016/j.jclepro.2024.144293","DOIUrl":"https://doi.org/10.1016/j.jclepro.2024.144293","url":null,"abstract":"Azo dye wastewater poses a serious threat to environment and human health due to steady structures make them resistant to biodegradation or chemical degradation. The coupling of photocatalysis and peroxymonosulfate (PMS) as an efficient strategy can achieve dye-contaminated water purification by inducing advance oxidation processes. In this study, magnetic FeCeO nanocrystals with heterojunction between Fe<sub>2</sub>O<sub>3</sub> and CeO<sub>2</sub> by one-step method were successfully synthesized to efficiently degrade methyl orange (MO) and Congo red (CR) by activating PMS under visible light irradiation. PMS molecules could be adsorbed by Fe<sub>2</sub>Ce<sub>1</sub>O composite and generated <span><span style=\"\"></span><span data-mathml='<math xmlns=\"http://www.w3.org/1998/Math/MathML\" />' role=\"presentation\" style=\"font-size: 90%; display: inline-block; position: relative;\" tabindex=\"0\"><svg aria-hidden=\"true\" focusable=\"false\" height=\"0.24ex\" role=\"img\" style=\"vertical-align: -0.12ex;\" viewbox=\"0 -51.7 0 103.4\" width=\"0\" xmlns:xlink=\"http://www.w3.org/1999/xlink\"><g fill=\"currentColor\" stroke=\"currentColor\" stroke-width=\"0\" transform=\"matrix(1 0 0 -1 0 0)\"></g></svg><span role=\"presentation\"><math xmlns=\"http://www.w3.org/1998/Math/MathML\"></math></span></span><script type=\"math/mml\"><math></math></script></span> radicals during photocatalytic process. Free radical quenching experiments and electron paramagnetic resonance (EPR) revealed that <span><span style=\"\"></span><span data-mathml='<math xmlns=\"http://www.w3.org/1998/Math/MathML\" />' role=\"presentation\" style=\"font-size: 90%; display: inline-block; position: relative;\" tabindex=\"0\"><svg aria-hidden=\"true\" focusable=\"false\" height=\"0.24ex\" role=\"img\" style=\"vertical-align: -0.12ex;\" viewbox=\"0 -51.7 0 103.4\" width=\"0\" xmlns:xlink=\"http://www.w3.org/1999/xlink\"><g fill=\"currentColor\" stroke=\"currentColor\" stroke-width=\"0\" transform=\"matrix(1 0 0 -1 0 0)\"></g></svg><span role=\"presentation\"><math xmlns=\"http://www.w3.org/1998/Math/MathML\"></math></span></span><script type=\"math/mml\"><math></math></script></span> radicals were the dominant species in photodegradation process. Fe<sub>2</sub>Ce<sub>1</sub>O catalyst could completely decompose dye molecules for waste solutions with low dye concentration. Increasing MO and CR concentrations to 100 mg L<sup>-1</sup>, the removal efficiencies of MO and CR by Fe<sub>2</sub>Ce<sub>1</sub>O were still up to 85.2% and 77.9% in sequence. And liquid chromatography mass spectrometry (LC-MS) was used to confirm the intermediates and degradation pathways during MO and CR degradation processes. Cyclic experiments demonstrated that Fe<sub>2</sub>Ce<sub>1</sub>O composite had good durability and reusability. Moreover, degradation mechanisms were investigated. This study provides new insight into the synthesis of heterogeneous metal oxide catalyst to solve the organic pollution issues.","PeriodicalId":349,"journal":{"name":"Journal of Cleaner Production","volume":"1 1","pages":""},"PeriodicalIF":11.1,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142690639","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Phosphorus (P) recycling from incinerated sewage sludge ash (SSA) is a promising way to mitigate the upcoming shortage concerns of phosphate rocks. However, low P bioavailability and high heavy metals concentration limit its recycling. In this study, a novel thermochemical treatment of SSA in N2 atmosphere was proposed with the substitute of sodium-based additives with flue gas desulfurization wastewater (DW) and the introduction of CaCl2. They played the synergistic roles in P transformation and P bioavailability with the increment of positive from 9.01 to 23.36% and from 20.24 to 53.58%, respectively compared to their theoretical values. Meanwhile, the decrement of heavy metals enrichment rate on different levels was generally observed owing to the formation gaseous chlorides by chlorination reaction. In detail, calcination enriched majority of P in SSA, though the P enrichment rate reduced. Alkaline DW promoted the transformation of non-apatite inorganic phosphorus (NAIP) to apatite phosphorus (AP) and the formation of Ca-bearing P minerals. A plant-available P compound, namely CaNaPO4, was detected due to the abundant sodium in DW. Both the increased P-solubility in citric acid (CA) and heavy metals reduction were observed. Adding CaCl2 further enhanced the transformation of NAIP to AP in the drying and calcination stages along with the reduction of Cd, Zn, Cu and Pb. At 30% CaCl2 dosage, the calcined SSA had the P-solubility in CA of 81.6%, which was near the conventional single super phosphate. The heavy metals concentration in the calcined SSA could meet the requirements of EU regulation of fertilizer. The work provides a new trial for the potential P recycling from SSA with co-utilization of DW.
从焚烧过的污水污泥灰烬（SSA）中回收磷（P）是缓解磷酸盐岩即将出现的短缺问题的一种可行方法。然而，低磷生物利用率和高重金属浓度限制了其回收利用。本研究提出了一种在 N2 大气中对 SSA 进行热化学处理的新方法，即用烟气脱硫废水（DW）替代钠基添加剂并引入 CaCl2。与理论值相比，它们在 P 转化和 P 生物利用率方面发挥了协同作用，正值分别从 9.01% 增加到 23.36%，从 20.24% 增加到 53.58%。同时，由于氯化反应形成气态氯化物，重金属富集率在不同水平上普遍下降。具体而言，煅烧富集了 SSA 中的大部分 P，但 P 的富集率有所下降。碱性 DW 促进了非磷灰石无机磷（NAIP）向磷灰石磷（AP）的转化，并形成了含钙化磷的矿物。由于 DW 中含有大量钠，因此检测到了一种植物可利用的磷化合物，即 CaNaPO4。在柠檬酸（CA）中观察到 P 溶解度的增加和重金属的减少。在干燥和煅烧阶段，CaCl2 的加入进一步促进了 NAIP 向 AP 的转化，同时还促进了镉、锌、铜和铅的还原。当 CaCl2 的用量为 30% 时，煅烧过的 SSA 在 CA 中的磷溶解度为 81.6%，接近传统的单一过磷酸钙。煅烧过的 SSA 中的重金属浓度可满足欧盟肥料法规的要求。这项工作为从 SSA 中回收潜在的磷并与 DW 共同利用提供了新的尝试。
{"title":"Thermochemical treatment of fly ash and desulfurization wastewater from municipal sewage sludge incineration plant for phosphorus recycling","authors":"Weijie Hu, Zechen Jin, Yuncong Qiu, Pengfei Zhang, Yuheng Feng, Yulin Tang","doi":"10.1016/j.jclepro.2024.144282","DOIUrl":"https://doi.org/10.1016/j.jclepro.2024.144282","url":null,"abstract":"Phosphorus (P) recycling from incinerated sewage sludge ash (SSA) is a promising way to mitigate the upcoming shortage concerns of phosphate rocks. However, low P bioavailability and high heavy metals concentration limit its recycling. In this study, a novel thermochemical treatment of SSA in N<sub>2</sub> atmosphere was proposed with the substitute of sodium-based additives with flue gas desulfurization wastewater (DW) and the introduction of CaCl<sub>2</sub>. They played the synergistic roles in P transformation and P bioavailability with the increment of positive <span><span style=\"\"><math></math></span><span style=\"font-size: 90%; display: inline-block;\" tabindex=\"0\"></span><script type=\"math/mml\"><math></math></script></span> from 9.01 to 23.36% and from 20.24 to 53.58%, respectively compared to their theoretical values. Meanwhile, the decrement of heavy metals enrichment rate on different levels was generally observed owing to the formation gaseous chlorides by chlorination reaction. In detail, calcination enriched majority of P in SSA, though the P enrichment rate reduced. Alkaline DW promoted the transformation of non-apatite inorganic phosphorus (NAIP) to apatite phosphorus (AP) and the formation of Ca-bearing P minerals. A plant-available P compound, namely CaNaPO<sub>4</sub>, was detected due to the abundant sodium in DW. Both the increased P-solubility in citric acid (CA) and heavy metals reduction were observed. Adding CaCl<sub>2</sub> further enhanced the transformation of NAIP to AP in the drying and calcination stages along with the reduction of Cd, Zn, Cu and Pb. At 30% CaCl<sub>2</sub> dosage, the calcined SSA had the P-solubility in CA of 81.6%, which was near the conventional single super phosphate. The heavy metals concentration in the calcined SSA could meet the requirements of EU regulation of fertilizer. The work provides a new trial for the potential P recycling from SSA with co-utilization of DW.","PeriodicalId":349,"journal":{"name":"Journal of Cleaner Production","volume":"35 1","pages":""},"PeriodicalIF":11.1,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142684499","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-22DOI: 10.1016/j.jclepro.2024.144244
F.X. Espinach, , R. Paz, R. Ortega, P. Fullana, A. Bala, C. Campos, M. Delgado-Aguilar, Q. Tarrés
The application of the Circular Economy can be a key answer to sustainability strategies and can reach peak importance in the outermost regions like the Canary Islands due to their limitations in the treatment of agroforestry and municipal waste. This paper explores the application of Circular Economy in the Canary Islands polymer transformation industry. The authors explore a polymer blend from plastic bottle caps recovered from the selective waste recollection that can be reinforced with banana fibers from the pseudostem and the rachis of the plants. The paper shows the potential and the competitiveness of the blends and the composite materials. The authors have found that the polymer blend can be used as a substitute for high-density polyethylene. The results show that composite materials with reinforcement percentages equal to or higher than 30 wt.% offer higher mechanical properties and are more cost-effective than plastic blends. The paper shows the opportunity to create value from urban and agroforestry waste and at the same time prevent the dumping of these subproducts.
{"title":"Composites made of a blend of plastics recovered from bottle caps reinforced with fibers from banana rachis waste. A Circular Economy Strategy in the Canary Islands.","authors":"F.X. Espinach, , R. Paz, R. Ortega, P. Fullana, A. Bala, C. Campos, M. Delgado-Aguilar, Q. Tarrés","doi":"10.1016/j.jclepro.2024.144244","DOIUrl":"https://doi.org/10.1016/j.jclepro.2024.144244","url":null,"abstract":"The application of the Circular Economy can be a key answer to sustainability strategies and can reach peak importance in the outermost regions like the Canary Islands due to their limitations in the treatment of agroforestry and municipal waste. This paper explores the application of Circular Economy in the Canary Islands polymer transformation industry. The authors explore a polymer blend from plastic bottle caps recovered from the selective waste recollection that can be reinforced with banana fibers from the pseudostem and the rachis of the plants. The paper shows the potential and the competitiveness of the blends and the composite materials. The authors have found that the polymer blend can be used as a substitute for high-density polyethylene. The results show that composite materials with reinforcement percentages equal to or higher than 30 wt.% offer higher mechanical properties and are more cost-effective than plastic blends. The paper shows the opportunity to create value from urban and agroforestry waste and at the same time prevent the dumping of these subproducts.","PeriodicalId":349,"journal":{"name":"Journal of Cleaner Production","volume":"8 1","pages":""},"PeriodicalIF":11.1,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142690641","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Cadmium (Cd) contamination necessitates effective remediation approaches. This study valorizes rice straw biochar by enhancing its Cd sorption capacity through sulfur functionalization. Biochar was functionalized with sulfur compounds (H2SO4, Na2S, and Na2S2O3) to introduce Lewis soft base characteristics for improved affinity towards Cd(II), a Lewis soft acid. Characterization confirmed successful grafting of various sulfur groups, increasing the sulfur content from 0.33% to 13.27% and boosting oxygen-containing functional groups. The sulfur-functionalized biochar demonstrated significantly enhanced Cd(II) sorption compared to pristine biochar, with a maximum capacity of 34.40 mg g-1 at pH 5.0 – a 17.3-fold increase – and reduced equilibrium time from 8 hours to 5-10 minutes. Density functional theory calculations suggested that sulfur doping facilitated Cd-S bond formation and modulated the electronic properties of the biochar-Cd systems, contributing to the superior sorption performance. Sulfur functionalization offers a cost-effective, eco-friendly method for enhanced Cd(II) removal, validated by experiments and theory.
{"title":"Sulfur-Functionalized Rice Straw Biochar for Enhanced Cadmium Sorption: Spectroscopic, Kinetic and Computational Insights","authors":"M.M.M. Ahmed, Chih-Hao Liao, Yu-Ting Liu, S. Venkatesan, Yi-Chen Hsieh, H.M. Nail, Hui-Min David Wang, Ming-Chang Lin, Shih-Hao Jien, Yu-min Tzou","doi":"10.1016/j.jclepro.2024.144267","DOIUrl":"https://doi.org/10.1016/j.jclepro.2024.144267","url":null,"abstract":"Cadmium (Cd) contamination necessitates effective remediation approaches. This study valorizes rice straw biochar by enhancing its Cd sorption capacity through sulfur functionalization. Biochar was functionalized with sulfur compounds (H<sub>2</sub>SO<sub>4</sub>, Na<sub>2</sub>S, and Na<sub>2</sub>S<sub>2</sub>O<sub>3</sub>) to introduce Lewis soft base characteristics for improved affinity towards Cd(II), a Lewis soft acid. Characterization confirmed successful grafting of various sulfur groups, increasing the sulfur content from 0.33% to 13.27% and boosting oxygen-containing functional groups. The sulfur-functionalized biochar demonstrated significantly enhanced Cd(II) sorption compared to pristine biochar, with a maximum capacity of 34.40 mg g<sup>-1</sup> at pH 5.0 – a 17.3-fold increase – and reduced equilibrium time from 8 hours to 5-10 minutes. Density functional theory calculations suggested that sulfur doping facilitated Cd-S bond formation and modulated the electronic properties of the biochar-Cd systems, contributing to the superior sorption performance. Sulfur functionalization offers a cost-effective, eco-friendly method for enhanced Cd(II) removal, validated by experiments and theory.","PeriodicalId":349,"journal":{"name":"Journal of Cleaner Production","volume":"18 1","pages":""},"PeriodicalIF":11.1,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142684552","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Vanadium (V) and chromium (Cr) are significant strategic metals and has been widely used in many applications. In order to realize resource utilization and harmless disposal of this metallurgical solid waste, an effective and clean process was proposed in this paper to recover V and Cr from this wastewater purification sludge (WPS), namely roasting pretreatment and thermal reduction co-alloying process. After a roasting pretreatment at 1000 °C, water and more than 75% of sulfur in sludge were removed from the WPS. The pre-treated sludge was used to produce Fe-Cr-V alloy by carbon thermal reduction co-alloying method with Fe2O3 powders as an additive. The thermodynamics software Fact Sage 8.3 was utilized to assess the feasibility of the reduction reaction and to design the components of both the slag and the alloy. The recovery rate of V and Cr were 99.4% and 99.6%, respectively, under the conditions of theoretical reducing agent dosage () value of 1.0, binary alkalinity (R= ) value of 1.06, and the temperature of 1550 °C. In addition, the mass percentages of Fe, Cr, and V in the left slag were 0.38%, 1.07%, and 0.09% (in Fe2O3, Cr2O3 and V2O5), respectively, which was tested to be non-hazardous waste. This work opens up a clean and efficient way of recovering valuable Cr and V from metallurgical solid wastes.
{"title":"A novel process for recovery of vanadium and chromium from vanadium-chromium sludge: Roasting pretreatment and thermal reduction co-alloying process","authors":"Xiong Li, Pei-yuan Ni, Tengfei Deng, Xiao-dong Hou, Wei Gao, Ying Li","doi":"10.1016/j.jclepro.2024.144275","DOIUrl":"https://doi.org/10.1016/j.jclepro.2024.144275","url":null,"abstract":"<em>Vanadium (V) and chromium (Cr) are</em> significant <em>strategic</em> metals and has been widely used in many applications. In order to <em>realize</em> resource utilization and harmless disposal of this metallurgical solid waste, an effective and clean process was proposed in this paper to recover V and Cr from this wastewater purification sludge (WPS), namely roasting pretreatment and thermal reduction co-alloying process. After a roasting pretreatment at 1000 °C, water and more than 75% of sulfur in sludge were removed from the WPS. The pre-treated sludge was used to produce Fe-Cr-V alloy by carbon thermal reduction co-alloying method with Fe<sub>2</sub>O<sub>3</sub> powders as an additive. The thermodynamics software Fact Sage 8.3 was utilized to assess the feasibility of the reduction reaction and to design the components of both the slag and the alloy. The recovery rate of V and Cr were 99.4% and 99.6%, respectively, under the conditions of theoretical reducing agent dosage (<span><math></math></span>) value of 1.0, binary alkalinity (R= <span><math></math></span>) value of 1.06, and the temperature of 1550 °C. In addition, the mass percentages of Fe, Cr, and V in the left slag were 0.38%, 1.07%, and 0.09% (in Fe<sub>2</sub>O<sub>3</sub>, Cr<sub>2</sub>O<sub>3</sub> and V<sub>2</sub>O<sub>5</sub>), respectively, which was tested to be non-hazardous waste. This work opens up a clean and efficient way of recovering valuable Cr and V from metallurgical solid wastes.","PeriodicalId":349,"journal":{"name":"Journal of Cleaner Production","volume":"7 1","pages":""},"PeriodicalIF":11.1,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142684550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Carbon leakage caused by factor flow is detrimental to the realization of global climate change goals, and the carbon reduction effect of factor flow is not yet clear. Reductions in the carbon emission intensity (CEI) can support ecologically and economically sustainable development efforts in developing countries. In this study, exploratory data analysis was used to investigate the spatial correlation characteristics of the CEI in the Yangtze River Delta, and the network of economic, data, and innovation flows was constructed via a gravity model. The heterogeneity impact of factor flows on CEI was analyzed via the STIRPAT model as multiple factors needed consideration. The results show that the CEI decreased from 0.375 tons/million yuan in 2010 to 0.173 tons/million yuan in 2022, with an average annual decrease of 6.719%, a significant positive spatial correlation, and an overall spatial pattern of decentralized distribution for low-value zones and banded agglomeration for high-value zones. Multidimensional factor flow was active, with the unbalanced development characteristics of "dense in the middle and sparse in the north and south" and a chain network "centered on the capital city of the province as the center of the preferential phase chain, multicenter flow". Data flow was the main factor influencing the change in CEI, followed by innovation flow and economic flow. However, the influence of industrial structure and landscape construction on CEI should not be neglected. This study deepens the understanding of the relationship between multidimensional factor flow and CEI. They can be used to build a platform for data circulation and technology transfer and promote integrated economic development.
要素流动造成的碳泄漏不利于全球气候变化目标的实现，而要素流动的减碳效果尚不明确。降低碳排放强度（CEI）可以支持发展中国家生态和经济上的可持续发展。本研究采用探索性数据分析方法研究了长三角地区碳排放强度的空间相关性特征，并通过引力模型构建了经济流、数据流和创新流网络。由于需要考虑多种因素，因此通过 STIRPAT 模型分析了要素流动对 CEI 的异质性影响。结果表明，CEI 从 2010 年的 0.375 吨/百万元下降到 2022 年的 0.173 吨/百万元，年均下降 6.719%，存在显著的空间正相关性，总体空间格局为低价值区分散分布、高价值区带状集聚。多维要素流动活跃，具有 "中部密集、南北稀疏 "的非均衡发展特征和 "以省会城市为中心的优相链、多中心流动 "的链状网络。数据流是影响 CEI 变化的主要因素，其次是创新流和经济流。然而，产业结构和景观建设对 CEI 的影响也不容忽视。本研究加深了对多维要素流与 CEI 关系的理解。它们可用于搭建数据流通和技术转移平台，促进经济一体化发展。
{"title":"Deciphering flows: Spatial correlation characteristics and factors influencing carbon emission intensity in the Yangtze River Delta","authors":"Tiangui Lv, Qiao Zhao, Shufei Fu, Gui Jin, Xinming Zhang, Han Hu, Guoliang Xu","doi":"10.1016/j.jclepro.2024.144290","DOIUrl":"https://doi.org/10.1016/j.jclepro.2024.144290","url":null,"abstract":"Carbon leakage caused by factor flow is detrimental to the realization of global climate change goals, and the carbon reduction effect of factor flow is not yet clear. Reductions in the carbon emission intensity (CEI) can support ecologically and economically sustainable development efforts in developing countries. In this study, exploratory data analysis was used to investigate the spatial correlation characteristics of the CEI in the Yangtze River Delta, and the network of economic, data, and innovation flows was constructed via a gravity model. The heterogeneity impact of factor flows on CEI was analyzed via the STIRPAT model as multiple factors needed consideration. The results show that the CEI decreased from 0.375 tons/million yuan in 2010 to 0.173 tons/million yuan in 2022, with an average annual decrease of 6.719%, a significant positive spatial correlation, and an overall spatial pattern of decentralized distribution for low-value zones and banded agglomeration for high-value zones. Multidimensional factor flow was active, with the unbalanced development characteristics of \"dense in the middle and sparse in the north and south\" and a chain network \"centered on the capital city of the province as the center of the preferential phase chain, multicenter flow\". Data flow was the main factor influencing the change in CEI, followed by innovation flow and economic flow. However, the influence of industrial structure and landscape construction on CEI should not be neglected. This study deepens the understanding of the relationship between multidimensional factor flow and CEI. They can be used to build a platform for data circulation and technology transfer and promote integrated economic development.","PeriodicalId":349,"journal":{"name":"Journal of Cleaner Production","volume":"255 1","pages":""},"PeriodicalIF":11.1,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142690637","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-22DOI: 10.1016/j.jclepro.2024.144276
Paúl Espinoza-Zambrano, Jaume Roig-Hernando, Carlos Marmolejo-Duarte
The transition towards a decarbonized European economy by 2050 provides numerous opportunities for companies in the real estate sector to integrate sustainable actions into their assets. In the office industry, green certifications are designed to disclose how sustainable a building is and to enable comparison among peers. This paper utilises semi-structured interviews with experts in real estate and sustainability to offer qualitative insights into the decision-making process behind the voluntary certification of office buildings with green certifications such as Leadership in Energy and Environmental Design -LEED- or Building Research Establishment Environmental Assessment Method -BREEAM-. It may shed light on emerging trends in the sustainable real estate market. The findings, separated into economic, social and technical dimensions, show deep, widespread implementation of green certifications in sustainability-sensitive demand and supply. They function as a discard or brown discount vector, rather than as a green premium. Expert commentary on how certifications influence asset values has been cautious, due to insufficient data. Furthermore, the benefits of green financing are disputed. Other vectors, such as carbon footprint and European taxonomy alignment, have gained relevance in investment and operational processes.
{"title":"Do green certifications add value? Feedback from high-level stakeholders in the Spanish office market","authors":"Paúl Espinoza-Zambrano, Jaume Roig-Hernando, Carlos Marmolejo-Duarte","doi":"10.1016/j.jclepro.2024.144276","DOIUrl":"https://doi.org/10.1016/j.jclepro.2024.144276","url":null,"abstract":"The transition towards a decarbonized European economy by 2050 provides numerous opportunities for companies in the real estate sector to integrate sustainable actions into their assets. In the office industry, green certifications are designed to disclose how sustainable a building is and to enable comparison among peers. This paper utilises semi-structured interviews with experts in real estate and sustainability to offer qualitative insights into the decision-making process behind the voluntary certification of office buildings with green certifications such as Leadership in Energy and Environmental Design -LEED- or Building Research Establishment Environmental Assessment Method -BREEAM-. It may shed light on emerging trends in the sustainable real estate market. The findings, separated into economic, social and technical dimensions, show deep, widespread implementation of green certifications in sustainability-sensitive demand and supply. They function as a discard or brown discount vector, rather than as a green premium. Expert commentary on how certifications influence asset values has been cautious, due to insufficient data. Furthermore, the benefits of green financing are disputed. Other vectors, such as carbon footprint and European taxonomy alignment, have gained relevance in investment and operational processes.","PeriodicalId":349,"journal":{"name":"Journal of Cleaner Production","volume":"71 1","pages":""},"PeriodicalIF":11.1,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142684549","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-22DOI: 10.1016/j.jclepro.2024.144280
Mohammad Amin Nabi-Sarvestani, Morteza Rasti-Barzoki, Soroush Safarzadeh
In recent years, there has been a change of approach in the field of using renewable energy and transitioning from fossil energy. Among its reasons, we can mention climate changes and global warming, population growth and increasing demand for energy, the limitation of fossil resources and their price increase, and issues such as energy security. Renewable energy has different types such as solar energy, biofuel energy, wind energy, geothermal energy, etc. Reports show that most of the pollution is related to the transportation sector. Since bioenergy can be used for heat, electricity, and fuel purposes, some countries use it as an alternative or hybrid fuel. Using biofuels has economic, social, and environmental advantages and helps sustainable development. In the current research, the interaction between the farmer, the biorefinery, and the government has been investigated under six scenarios. The farmer determines the amount of land allocated to second-generation biomass cultivation. Biorefinery specifies the technology level and process of biofuel production. Since biofuel production processes are regularly being investigated in laboratories and have a growing trend, The concept of technology level is also considered to examine different states of low-level technology to high-level technology. In some scenarios, the government adopts a policy of indifference, and in some scenarios an active support policy by providing subsidies. At the end, a numerical example is presented numerical sensitivity analysis is performed, and management results are expressed. The results show that the input rate of biomass to the biorefinery is effective in adopting the technology level. Also, the highest price of biomass exists in the case where the farmer decides to develop the land with a non-linear cost because the costs increase.
{"title":"A Game-Theoretic Approach for Investigating the Amount of Land Assigned to Biomass Cultivation and Adopt the Degree of Technology by Biorefinery Considering Government Intervention: A Case Study of Iran","authors":"Mohammad Amin Nabi-Sarvestani, Morteza Rasti-Barzoki, Soroush Safarzadeh","doi":"10.1016/j.jclepro.2024.144280","DOIUrl":"https://doi.org/10.1016/j.jclepro.2024.144280","url":null,"abstract":"In recent years, there has been a change of approach in the field of using renewable energy and transitioning from fossil energy. Among its reasons, we can mention climate changes and global warming, population growth and increasing demand for energy, the limitation of fossil resources and their price increase, and issues such as energy security. Renewable energy has different types such as solar energy, biofuel energy, wind energy, geothermal energy, etc. Reports show that most of the pollution is related to the transportation sector. Since bioenergy can be used for heat, electricity, and fuel purposes, some countries use it as an alternative or hybrid fuel. Using biofuels has economic, social, and environmental advantages and helps sustainable development. In the current research, the interaction between the farmer, the biorefinery, and the government has been investigated under six scenarios. The farmer determines the amount of land allocated to second-generation biomass cultivation. Biorefinery specifies the technology level and process of biofuel production. Since biofuel production processes are regularly being investigated in laboratories and have a growing trend, The concept of technology level is also considered to examine different states of low-level technology to high-level technology. In some scenarios, the government adopts a policy of indifference, and in some scenarios an active support policy by providing subsidies. At the end, a numerical example is presented numerical sensitivity analysis is performed, and management results are expressed. The results show that the input rate of biomass to the biorefinery is effective in adopting the technology level. Also, the highest price of biomass exists in the case where the farmer decides to develop the land with a non-linear cost because the costs increase.","PeriodicalId":349,"journal":{"name":"Journal of Cleaner Production","volume":"8 1","pages":""},"PeriodicalIF":11.1,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142684547","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-22DOI: 10.1016/j.jclepro.2024.144289
H.T.T. Tran, R. Radjef, M. Nikzad, R. Bjekovic, B. Fox
Recently, economic and environmental concerns over the accumulation of end-of-life carbon fibre composite wastes have led to the extensive search for sustainable materials offering a lower environmental impact. Lately, vitrimers – a modern class of covalent adaptable networks – appeared as an innovative polymer, bridging the gap between thermoplastics and thermosets. However, the synthesis of vitrimers often involves the consumption of petrochemicals, increasing the carbon footprint and conflicts with the sustainability regulations in the “green” polymer industry. Herein, a biobased vitrimer from vanillin was successfully prepared via a catalyst-free imine condensation reaction. The Fourier Transform Infrared absorption peak at 1644 cm-1 represents the imine bond in the vanillin-based vitrimer (v-vitrimer). The thermal gravimetric analysis of the v-vitrimer shows good thermal stability (Td5% ∼ 240 °C) compared to the control polyimine vitrimer (285 °C) and the industry-grade vitrimer (Vitrimax) (299 °C). Differential scanning calorimetry (DSC) shows that v-vitrimer exhibits a higher glass transition temperature (85 °C) than that obtained from the control vitrimer (75 °C) and Vitrimax vitrimer (55 °C). Dynamic mechanical analysis shows that v-vitrimer exhibits rapid stress relaxation, reaching a relaxation time (37% relaxation) within 30 seconds. Owing to the fast stress relaxation at elevated temperatures, v-vitrimer can be thermally reprocessed by hot-press at their glass transition temperature (85 °C). Moreover, v-vitrimer can be chemically recycled via both acid hydrolysis and transamination thanks to reversible imine bonds in the v-vitrimer system. This work proposed a promising procedure to synthesise vitrimer from biobased materials with reprocessability and recyclability.
{"title":"A Vanillin-based Vitrimer Matrix for Recyclable and Sustainable Carbon Fibre-Reinforced Composites","authors":"H.T.T. Tran, R. Radjef, M. Nikzad, R. Bjekovic, B. Fox","doi":"10.1016/j.jclepro.2024.144289","DOIUrl":"https://doi.org/10.1016/j.jclepro.2024.144289","url":null,"abstract":"Recently, economic and environmental concerns over the accumulation of end-of-life carbon fibre composite wastes have led to the extensive search for sustainable materials offering a lower environmental impact. Lately, vitrimers – a modern class of covalent adaptable networks – appeared as an innovative polymer, bridging the gap between thermoplastics and thermosets. However, the synthesis of vitrimers often involves the consumption of petrochemicals, increasing the carbon footprint and conflicts with the sustainability regulations in the “green” polymer industry. Herein, a biobased vitrimer from vanillin was successfully prepared via a catalyst-free imine condensation reaction. The Fourier Transform Infrared absorption peak at 1644 cm<sup>-1</sup> represents the imine bond in the vanillin-based vitrimer (v-vitrimer). The thermal gravimetric analysis of the v-vitrimer shows good thermal stability (T<sub>d5%</sub> ∼ 240 °C) compared to the control polyimine vitrimer (285 °C) and the industry-grade vitrimer (Vitrimax) (299 °C). Differential scanning calorimetry (DSC) shows that v-vitrimer exhibits a higher glass transition temperature (85 °C) than that obtained from the control vitrimer (75 °C) and Vitrimax vitrimer (55 °C). Dynamic mechanical analysis shows that v-vitrimer exhibits rapid stress relaxation, reaching a relaxation time (37% relaxation) within 30 seconds. Owing to the fast stress relaxation at elevated temperatures, v-vitrimer can be thermally reprocessed by hot-press at their glass transition temperature (85 °C). Moreover, v-vitrimer can be chemically recycled via both acid hydrolysis and transamination thanks to reversible imine bonds in the v-vitrimer system. This work proposed a promising procedure to synthesise vitrimer from biobased materials with reprocessability and recyclability.","PeriodicalId":349,"journal":{"name":"Journal of Cleaner Production","volume":"59 1","pages":""},"PeriodicalIF":11.1,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142690646","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-21DOI: 10.1016/j.jclepro.2024.144268
Usha Nellur, Kavya K. S, Nagaraj S. Naik, Mahesh Padaki
Organic–inorganic nanohybrids based membrane materials are reported for separation applications. In the present study, poly(ionic liquid)-stabilized TiO2/polysulfone-based mixed matrix membranes are produced using a phase separation technique induced by a nonsolvent. The presence of PIL-stabilized TiO2 nanohybrids and the hydrophilic nature of PIL enhance the overall hydrophilicity of the PSf membrane, reaching an impressive water flux of 158 LMH at an operating pressure of 6 bar. Further, membranes were characterized through, Field emission scanning electron microscopy, X-ray diffraction, Atomic force microscopy, Thermogravimetry, and Zeta potential. The synergistic effect of positively charged PIL and TiO2 nanohybrids enhances the membrane's anionic dye retention capability, achieving retention rates of nearly 90.83% for Methyl Blue, 94.28% for Congo red, 65.89% for Evan’s blue, and 30.98% for Methyl orange with respect to dye size. However hydrophilic membrane showed outstanding antifouling property of the M2 membrane achieved ∼ 77% of flux recovery ratio with minimal of ∼37% total fouling for 1000 ppm of Bovine Serum Albumin as a foulant. Highly efficient nanocomposite membranes exhibit significant potential for dye removal and addressing water contamination issues, making them attractive solutions for sustainable fouling resilient water treatment processes.
{"title":"Innovation of Poly(ionic liquid)-Stabilized TiO2 for Membrane-based Dye Waste Remediation","authors":"Usha Nellur, Kavya K. S, Nagaraj S. Naik, Mahesh Padaki","doi":"10.1016/j.jclepro.2024.144268","DOIUrl":"https://doi.org/10.1016/j.jclepro.2024.144268","url":null,"abstract":"Organic–inorganic nanohybrids based membrane materials are reported for separation applications. In the present study, poly(ionic liquid)-stabilized TiO<sub>2</sub>/polysulfone-based mixed matrix membranes are produced using a phase separation technique induced by a nonsolvent. The presence of PIL-stabilized TiO<sub>2</sub> nanohybrids and the hydrophilic nature of PIL enhance the overall hydrophilicity of the PSf membrane, reaching an impressive water flux of 158 LMH at an operating pressure of 6 bar. Further, membranes were characterized through, Field emission scanning electron microscopy, X-ray diffraction, Atomic force microscopy, Thermogravimetry, and Zeta potential. The synergistic effect of positively charged PIL and TiO<sub>2</sub> nanohybrids enhances the membrane's anionic dye retention capability, achieving retention rates of nearly 90.83% for Methyl Blue, 94.28% for Congo red, 65.89% for Evan’s blue, and 30.98% for Methyl orange with respect to dye size. However hydrophilic membrane showed outstanding antifouling property of the M<sub>2</sub> membrane achieved ∼ 77% of flux recovery ratio with minimal of ∼37% total fouling for 1000 ppm of Bovine Serum Albumin as a foulant. Highly efficient nanocomposite membranes exhibit significant potential for dye removal and addressing water contamination issues, making them attractive solutions for sustainable fouling resilient water treatment processes.","PeriodicalId":349,"journal":{"name":"Journal of Cleaner Production","volume":"253 1","pages":""},"PeriodicalIF":11.1,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142678538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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