Article
Engineering, Environmental
Ao Zhou, Wenjie Zhang, Huinan Wei, Tiejun Liu, Dujian Zou, Henghui Guo
Summary: Engineering sediment waste increases significantly with the utilization of underground space, and a novel recycling approach is urgently needed. Recycled sediment can be used to partially substitute cement in mortar, improving compressive strength. Compared to landfilling, the recycling method can save energy consumption and reduce global warming potential, showing better overall performance in mechanical, environmental, and economic aspects.
RESOURCES CONSERVATION AND RECYCLING
(2021)
Review
Green & Sustainable Science & Technology
Muhammad Ayub, Mohd Hafiz Dzarfan Othman, Imran Ullah Khan, Siti Khadijah Hubadillah, Tonni Agustiono Kurniawan, Ahmad Fauzi Ismail, Mukhlis A. Rahman, Juhana Jaafar
Summary: This article discusses the sustainable utilization of palm oil fuel ash (POFA) as a valuable material and advocates for major palm oil-producing countries to adopt circular economy principles to reduce the harmful effects of POFA on the environment and health.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Engineering, Environmental
Yuelin Li, Ruben Debusschere, Qiang Yuan, Jiabin Li
Summary: Jet grouting waste (JGW), a cement-soil mixture, is a significant solid waste stream from soil consolidation activities. The current disposal of JGW at landfills poses an environmental issue. This research evaluated the use of JGW as a cementitious material and found that it enhanced the hydration rate and degree of cement clinker phases. Adding up to 20% JGW showed similar properties to the control specimen in terms of rheology, pore structure, and compressive strength. This supports the use of JGW to develop greener cement-based materials.
RESOURCES CONSERVATION AND RECYCLING
(2023)
Review
Construction & Building Technology
Yazan I. Abu Aisheh
Summary: New progress has been made in recycling processes that can convert non-renewable materials into partially renewable resources. Using supplementary cement-based materials, such as palm-oil fuel ash, in concrete production shows significant potential in reducing waste, cost, health risks, energy consumption, and environmental degradation. This paper provides a state-of-the-art review on the use of palm-oil fuel ash in concrete and its impact on workability, compressive strength, splitting tensile strength, and durability. Future research developments in this field are also discussed.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Green & Sustainable Science & Technology
Ao Zhou, Kexuan Li, Tiejun Liu, Dujian Zou, Xuan Peng, Hanxiong Lyu, Jindong Xiao, Chenchen Luan
Summary: The development of underground space in cities is important for urban infrastructure, but it also leads to the accumulation of sediment waste, causing environmental problems and endangering public safety. This study recycled sediment waste into geopolymer paste using calcination and alkali activators, and investigated its mechanical properties and working performance. The results showed that the compressive strength of recycled geopolymer paste can reach 50 MPa. Additionally, the environmental impact of geopolymer paste was found to be lower than that of cement-based material, and the geopolymer paste exhibited better overall performance according to a multi-criteria evaluation.
JOURNAL OF CLEANER PRODUCTION
(2023)
Review
Construction & Building Technology
K. Nandhini, J. Karthikeyan
Summary: A comprehensive review on the utilization of waste eggshells in construction was conducted, revealing that blending powdered eggshells with concrete can enhance strength and performance, offering a low-cost and energy-efficient resource for construction.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Maria Idrees, Farhan Saeed, Zia Farooq, Fuat Koksal, Jinyan Shi
Summary: Efficient management of waste materials is crucial for a cleaner environment. This study demonstrates that incorporating discarded carpet threads and silica fume into concrete significantly increases its tensile and flexural strengths, as well as other durability characteristics. This approach not only improves concrete properties but also helps conserve resources, promote sustainability, recycling, and a circular economy.
JOURNAL OF BUILDING ENGINEERING
(2023)
Review
Environmental Sciences
Mouhamadou Amar, Mahfoud Benzerzour, Joelle Kleib, Nor-Edine Abriak
Summary: In the cement industry, there is a growing focus on the preservation of natural resources and the reuse of waste materials like sediments. Specific treatment techniques are required to improve the mechanical and physiochemical properties of sediments for their effective use in various applications.
INTERNATIONAL JOURNAL OF SEDIMENT RESEARCH
(2021)
Review
Green & Sustainable Science & Technology
Jijiang Huang, Andrei Veksha, Wei Ping Chan, Apostolos Giannis, Grzegorz Lisak
Summary: Proper management of plastic waste is crucial to prevent its harmful environmental impacts, with emphasis on reuse, recovery, and recycling to minimize negative effects and promote optimization of plastic-based materials. Chemical recycling techniques with catalysts are being studied for efficient energy and material recovery, with a focus on the quality and yield of products and suggestions for catalyst design and process improvement for material circularity.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2022)
Review
Green & Sustainable Science & Technology
G. Yang, J. Zhao, Y. Wang
Summary: This article reviews the research progress on the durability of sustainable alkali-activated cementitious material (AACM) as marine engineering materials, including the aspects of reaction mechanism, microstructure, corrosion resistance, and marine engineering applications. AACM has huge use value and application potential in marine engineering.
MATERIALS TODAY SUSTAINABILITY
(2022)
Article
Green & Sustainable Science & Technology
Karoline Owusu-Sekyere, David Alatule Aladago
Summary: Informal e-waste recycling is significant in developing countries but poses risks to human health and the environment. There is a lack of data on informal processing, hindering the development of appropriate management strategies. Material Flow Analysis and risk assessment can provide insights into waste flows and risks in order to identify necessary actions.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Engineering, Multidisciplinary
L. Krishnaraj, P. T. Ravichandran
Summary: The study investigates the strength improvement and microstructural behavior of ultra-fine fly ash particles through synthesis and characterization techniques, showing positive effects on mortar and masonry. X-Ray Diffraction reveals multiphase crystalline structures, while readings indicate enhanced compressive strength, shear resistance, and bonding in construction applications using ultra-fine fly ash.
AIN SHAMS ENGINEERING JOURNAL
(2021)
Article
Construction & Building Technology
Slawomir Czarnecki, Marlena Rudner
Summary: In the European Union, a study was conducted to analyze the waste generated during the dismantling of residential buildings constructed prior to 1945. Sustainable material engineering promotes the reuse of waste materials to reduce construction waste and costs. Researchers are exploring the potential use of waste materials in composite materials, while users' preferences highlight the importance of environmental concerns, quality, and price.
Review
Construction & Building Technology
Hussein M. Hamada, Blessen Skariah Thomas, Fadzil M. Yahaya, Khairunisa Muthusamy, Jian Yang, Jamal A. Abdalla, Rami A. Hawileh
Summary: The use of palm oil waste as a supplementary cementitious material in concrete production is recommended to enhance sustainability in the construction industry. Treatments on raw POFA particles can improve its quality and positively impact the compressive strength and resistance properties of concrete.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Development Studies
Mochamad Arief Budihardjo, Septa Yudha Ardiansyah, Bimastyaji Surya Ramadan
Summary: The study conducted descriptive analysis of community-driven material recovery facilities (CdMRFs) in Semarang City, Indonesia, with stakeholder and spatial analyses to formulate the best strategic framework for improvement. CdMRFs have strengths and weaknesses when operating at the neighborhood level, and the involvement of all stakeholders is crucial for recruiting members and increasing waste recovery rates. Improved transaction recording for pick-up and collection services may significantly enhance CdMRF operation.
HABITAT INTERNATIONAL
(2022)
Article
Engineering, Environmental
Yui Kawasaki, Sayaka Nagao-Sato, Misa Shimpo, Kahori Fujisaki, Emi Yoshii, Rie Akamatsu, Petra Warschburger
Summary: This study qualitatively describes sustainable dietary behaviors (SDBs) that Japanese and German adults can implement in their lives, and quantitatively compares the similarities and differences in understanding SDBs between the two samples. The study found that Japanese participants were more focused on food waste prevention, while German participants were more focused on solving environmental problems.
RESOURCES CONSERVATION AND RECYCLING
(2024)
Article
Engineering, Environmental
Kechun Chen, Yuan Ding, Liming Yang, Zhihao Wang, Haoxuan Yu, Difan Fang, Yufa Feng, Liying Hu, Chenxi Xu, Penghui Shao, Xubiao Luo, Liang Chen
Summary: This study proposes a targeted repair scheme for the recovery of graphite anodes from spent LIBs by systematically characterizing and analyzing the structure and composition of spent graphite (SG). The results show that the repair scheme achieves effective SG repair and the repaired graphite anode displays excellent lithium storage performance.
RESOURCES CONSERVATION AND RECYCLING
(2024)
Article
Engineering, Environmental
Takao Ueda, Shigeki Koyanaka, Tatsuya Oki
Summary: Fires caused by accidental crushing of batteries are a serious issue in the e-waste recycling process. A new in-line sorting system that uses X-ray scanning and deep learning has been developed to accurately detect batteries. Through a validation study, the system achieved higher accuracy compared to other existing programs.
RESOURCES CONSERVATION AND RECYCLING
(2024)
Article
Engineering, Environmental
Hannes Geist, Frank Balle
Summary: Research on circular economy often lacks empirical data, especially in the theory of circular process design and design for remanufacturing. This study systematically collected and analyzed engineering data on seven remanufacturing processes in the European automotive remanufacturing industry for the first time, providing empirical support for circular engineering challenges, potentials, and solutions.
RESOURCES CONSERVATION AND RECYCLING
(2024)
Article
Engineering, Environmental
Xiaojing Li, Fan Lue, Nanlin Liao, Hua Zhang, Na Yang, Pinjing He
Summary: This study assesses and predicts the greenhouse gas emissions on the timeline as waste treatment technologies develop in Shanghai from 1991 to 2025 using the Life Cycle Assessment (LCA) methodology. The findings demonstrate that GHG emission has reached net-zero in 2019 owing to the application of alternative technologies and waste segregation.
RESOURCES CONSERVATION AND RECYCLING
(2024)
Article
Engineering, Environmental
Bingchun Liu, Haoyang Wang, Xiaoqin Liang, Yibo Wang, Zijie Feng
Summary: The expansion of the photovoltaic market has resulted in a significant increase in PV waste. Therefore, conducting scientific research to determine the importance of the circular economy for sustainable growth in the PV industry is essential. The study demonstrates that accurate prediction of PV installed capacity and quantifying the importance of recycling in balancing the supply and demand of raw materials can be achieved through a multi-factor installed capacity prediction model and recovery potential prediction.
RESOURCES CONSERVATION AND RECYCLING
(2024)
Review
Engineering, Environmental
Chuanzhen Zhang, Baojing Gu, Xia Liang, Shu Kee Lam, Yi Zhou, Deli Chen
Summary: Reactive nitrogen is crucial for agriculture and human nutrition, but mismanagement can have detrimental effects on human health and ecosystem services, hindering the achievement of the 2030 Sustainable Development Goals. Progress towards nitrogen-related targets varies across countries, highlighting the need for integrated management to achieve overall synergies.
RESOURCES CONSERVATION AND RECYCLING
(2024)
Article
Engineering, Environmental
Alessandro Gatto, Marijke Kuiper, Corina van Middelaar, Hans van Meijl
Summary: This study examines the economic and environmental effects of transitioning towards more circular food systems in the European Union (EU27) by feeding animals with low-opportunity-cost feed and better utilizing local feed resources. The results show that providing subsidies for circularity and promoting the use of low-cost feed can increase animal production, but also have negative impacts on land use and emissions. On the other hand, promoting domestic feed sourcing through import tariffs can decrease animal production and greenhouse gas emissions in agriculture. However, complementary policies are needed to mitigate drawbacks and enhance benefits of a more circular agri-food system.
RESOURCES CONSERVATION AND RECYCLING
(2024)
Article
Engineering, Environmental
Jinbo Zhang, Liu Chen, Yulei Xie, Pingjian Yang, Zheng Li, Huaicheng Guo, Yang Zhang, Lirong Liu
Summary: This study examines the impact of carbon taxes on low-carbon development and climate change mitigation. By constructing a cross-system bi-layer model, the study finds that reasonable carbon taxes can promote the stability of the energy network, reduce carbon emissions and air pollutants, and optimize production efficiency and the structure of the energy system. This study contributes to a better understanding of the effects and implementation pathways of carbon taxes.
RESOURCES CONSERVATION AND RECYCLING
(2024)
Article
Engineering, Environmental
Konstantin Born, Mehmet Metehan Ciftci
Summary: Increasing recycling of metals is important for reducing reliance on mining, but it cannot fully meet future metal demand. Primary production of metals is expected to continue rising, highlighting the need for alternative circular economy strategies such as demand reduction and mitigating harmful impacts of primary metal production.
RESOURCES CONSERVATION AND RECYCLING
(2024)
Article
Engineering, Environmental
Yinqiu Ma, Lin Huang, Jiahui Li, Wei Cao, Yumei Cai
Summary: Afforestation and reforestation, such as China's Grain for Green Program, have shown to effectively mitigate greenhouse gas emissions and contribute to carbon sink capacity. This study highlights the significant carbon potential of the program and its potential application in other countries to reduce CO2 in the atmosphere.
RESOURCES CONSERVATION AND RECYCLING
(2024)
Article
Engineering, Environmental
Arlind Dervishaj, Kjartan Gudmundsson
Summary: This paper reviews digital tools for supporting the Circular Economy (CE) in the built environment and provides suggestions. The study identifies limitations in the functionalities of current tools, including a lack of representative data for LCA and underdeveloped circularity indicators. Further development is needed in terms of interoperability aspects, integration of more sources of data for LCA and circularity, and possibilities for a comprehensive evaluation of design choices.
RESOURCES CONSERVATION AND RECYCLING
(2024)
Article
Engineering, Environmental
Mohamadreza Y. Azarfam, Anuj Maheshwari, Frank D. Blum, Siddhesh Chaudhari, Clinton Switzer, Ranji Vaidyanathan, Jay C. Hanan, Sudheer Bandla
Summary: This study introduces a feasible method for manufacturing recycled composites using post-consumer carpets and recycled resin. The resulting composites have impressive strength and modulus, surpassing commercial thermoplastics and making them suitable for structural applications. This research presents a promising approach to address carpet landfilling and reduce reliance on additives.
RESOURCES CONSERVATION AND RECYCLING
(2024)
Article
Engineering, Environmental
Pujiang Shi, Tianle Huang, Hong Kit Lim, Chiew Kei Tan, Jong-Min Lee, Chor Yong Tay
Summary: This study developed a highly porous bioadaptive 3D sponge-like construct from plastic materials in discarded keyboards for advanced in vitro applications. The findings demonstrate the potential of using discarded keyboards as a waste-to-resource feedstock to achieve waste reduction and maximize value-capture.
RESOURCES CONSERVATION AND RECYCLING
(2024)
Article
Engineering, Environmental
Kuo-Jui Wu, Hailing Qiu, Caiyan Huang, Anthony S. F. Chiu, Ming-Lang Tseng
Summary: Government resource allocation practices for achieving carbon neutrality should be guided by dynamic system theory to identify potential dynamics. Carbon intensity control dynamics have a significant influence on other dynamics.
RESOURCES CONSERVATION AND RECYCLING
(2024)