Waste management最新文献_第5页

The effect of desiccation cracks on water infiltration in landfill cover under extreme climate scenarios

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2025-02-16 DOI: 10.1016/j.wasman.2025.02.021

Arwan Apriyono , Yuliana Yuliana , Viroon Kamchoom , Anthony Kwan Leung , Apiniti Jotisankasa , Zhan Liangtong

{"title":"The effect of desiccation cracks on water infiltration in landfill cover under extreme climate scenarios","authors":"Arwan Apriyono , Yuliana Yuliana , Viroon Kamchoom , Anthony Kwan Leung , Apiniti Jotisankasa , Zhan Liangtong","doi":"10.1016/j.wasman.2025.02.021","DOIUrl":"10.1016/j.wasman.2025.02.021","url":null,"abstract":"<div><div>Predicting water infiltration in clay poses a significant challenge, primarily due to the presence of desiccation cracks, which are amplified by extreme climate. Accurate methods for calculating water infiltration, considering crack variations under extreme climates are essential especially for landfill covers. The objective of this study is to explore the relationship between crack intensity factor (CIF) and water infiltration in high-plasticity clay, focusing on seasonal changes and extreme climate conditions. A series of double-ring infiltration tests was conducted in the field to observe the impact of desiccation cracks on water infiltration. Subsequently, a modified Green–Ampt method incorporating CIF was developed and validated against these field test results to improve water infiltration predictions. This study revealed that the maximum CIF was notably higher in the second dry season (11.4 %) than that in the first one (8.1 %), indicating soil structural degradation. An exponential correlation was observed between increased CIF and infiltration rates, attributed to cracks creating preferential pathways. In extreme climate scenarios, CIF increases could surpass 15 %, potentially elevating soil’s saturated hydraulic conductivity (K<sub>s</sub>) by over 85 % relative to current climate conditions.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"196 ","pages":"Pages 10-21"},"PeriodicalIF":7.1,"publicationDate":"2025-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143421552","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

引用次数: 0

Enabling the twin transition of the textile industry: A systematic literature review

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2025-02-15 DOI: 10.1016/j.wasman.2025.02.025

Rabia Hassan, Federica Acerbi, Sergio Terzi, Paolo Rosa

{"title":"Enabling the twin transition of the textile industry: A systematic literature review","authors":"Rabia Hassan, Federica Acerbi, Sergio Terzi, Paolo Rosa","doi":"10.1016/j.wasman.2025.02.025","DOIUrl":"10.1016/j.wasman.2025.02.025","url":null,"abstract":"<div><div>The textile industry, a significant resource consumer and polluter, ranks as the fourth-largest sector in raw material consumption and the fifth-largest emitter of greenhouse gases. To address these significant environmental challenges, there is an urgent need for a transformative shift toward sustainable production paradigms. However, circular strategies specific to various textile materials still need to be explored in existing research. This manuscript examines the adoption of circular strategies in the textile industry, focusing on key materials such as cotton, polyester, wool, silk, linen, polyamide, viscose, flax, and azlons. A comprehensive systematic literature review of 82 eligible papers from the Scopus database identified critical research streams: circular strategies, digital technologies, and evaluation methods. Findings reveal that cotton and polyester have received the most attention in circular practices, particularly in areas such as closed-loop supply chains, textile waste management, reuse, recycling, etc. In contrast, materials like wool, silk, linen, polyamide, viscose, flax, and azlons have been insufficiently studied, highlighting a critical gap in the literature that needs to be addressed. The authors developed a conceptual framework based on these findings to enhance understanding of the current research landscape. This review emphasizes the need for further investigation into circular strategies for a broader range of textile materials and suggests potential pathways for future research, providing valuable insights for advancing sustainability in the textile sector.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"195 ","pages":"Pages 294-307"},"PeriodicalIF":7.1,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143422267","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Centrifuge model test studies on mechanically-biologically treated waste under seismic loading

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2025-02-14 DOI: 10.1016/j.wasman.2025.02.020

Wenjie Chen , Zhenying Zhang , Hui Zhu , Zheheng Ma , Youwen Zhang , Bingke Lu , Kaifu Liu , Bo Huang

{"title":"Centrifuge model test studies on mechanically-biologically treated waste under seismic loading","authors":"Wenjie Chen , Zhenying Zhang , Hui Zhu , Zheheng Ma , Youwen Zhang , Bingke Lu , Kaifu Liu , Bo Huang","doi":"10.1016/j.wasman.2025.02.020","DOIUrl":"10.1016/j.wasman.2025.02.020","url":null,"abstract":"<div><div>Early earthquakes often trigger landfill slope failures and damage to cover and liner systems, resulting in gas leakage, environmental contamination, and significant risks to landfill safety. Accurately assessing the static and dynamic characteristics of mechanically biologically treated (MBT) waste is crucial. Centrifuge shaking table tests offer a robust method to address the limitations of conventional shaking table tests by effectively simulating the static and dynamic stress–strain fields of prototype soils, fulfilling the requirements for comprehensive static and dynamic analysis. Accordingly, this study conducted experimental research on MBT waste using a centrifuge shaking table. Key findings are as follows: (1) The Poisson’s ratio of MBT waste is 0.483, and its small-strain shear modulus increases with depth, with a derived equation representing the relationship between small-strain shear modulus and depth. (2) MBT waste demonstrated a significant dynamic amplification effect, with an amplification factor ranging from 1.122 to 1.332. (3) The equivalent shear modulus of MBT waste decreases with increasing strain but increases with depth, with a surface equation established between the equivalent shear modulus, strain, and depth. (4) The equivalent damping ratio of MBT waste varies with strain and depth, and a surface equation was established to capture this relationship. (5) A comparison of the normalized equivalent shear modulus and equivalent damping ratio between MBT waste and municipal solid waste (MSW) shows that both parameters are higher in MBT waste than in MSW. These findings provide valuable insights for seismic stability analysis of MBT landfills.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"195 ","pages":"Pages 284-293"},"PeriodicalIF":7.1,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143402842","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

引用次数: 0

Does exposure enhance interest? An analysis of composting exposure on interest in household waste management

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2025-02-13 DOI: 10.1016/j.wasman.2025.02.019

Mohammad Mashiur Rahman , Niraj Khatiwada , Alok K. Bohara

{"title":"Does exposure enhance interest? An analysis of composting exposure on interest in household waste management","authors":"Mohammad Mashiur Rahman , Niraj Khatiwada , Alok K. Bohara","doi":"10.1016/j.wasman.2025.02.019","DOIUrl":"10.1016/j.wasman.2025.02.019","url":null,"abstract":"<div><div>With the increasing amount of household waste produced in developing countries’ municipalities, composting can be a crucial alternative to ease the burden of disposal. This study utilizes primary survey data to investigate the association between households’ exposure to public composting campaigns and the interest in composting in Siddharthanagar Municipality, Nepal. We also use household attitudes, knowledge, barriers, and policy variables. Further, using our geo-referenced data as a novel approach, we probe the spatial connections between exposure and interest and investigate any inter-regional differences by constructing spatial maps. The dichotomous model results indicate a significant positive impact of exposure to composting campaigns on interest in composting, and the results remain consistent after the robustness check. Further, spatial autocorrelation is evident for composting exposure and interest. The spatial maps indicate inter-regional similarity for these variables. These results indicate the urge for policies that extensively promote public information regarding composting at the household level.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"196 ","pages":"Pages 1-9"},"PeriodicalIF":7.1,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143421550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

引用次数: 0

Detailed estimation of generated woody biomass ash for use as fertilizer material

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2025-02-12 DOI: 10.1016/j.wasman.2025.02.009

Minori Ike , Hiroyuki Kawagoe , Kazuyuki Oshita , Masaki Takaoka

{"title":"Detailed estimation of generated woody biomass ash for use as fertilizer material","authors":"Minori Ike , Hiroyuki Kawagoe , Kazuyuki Oshita , Masaki Takaoka","doi":"10.1016/j.wasman.2025.02.009","DOIUrl":"10.1016/j.wasman.2025.02.009","url":null,"abstract":"<div><div>The physical and chemical characteristics of woody biomass ash (WBA) are highly dependent on the ash type, fuel, and furnace type. WBA recycling requires knowledge of its amount and characteristics. In this study, the amount of WBA recoverable as fertilizer in Japan was estimated considering the ash type, furnace type, and fuel type, using data obtained in a questionnaire-based survey of 105 of the 220 biomass power plants in Japan. The results showed that the amount of ash was > 1.5 times larger than that calculated according to fuel type. The discharged ash contained moisture, sand, and impurities. The slopes of the estimation model of the actual versus calculated amount were larger for gasification power generation, followed by stoker furnaces and fluidized bed furnaces. The bottom ash ratio in WBA from all furnace types was 0.37. With an estimated biomass combustion by the 220 biomass power plants in Japan of 3.4 × 10<sup>7</sup> t in 2026, the amount of generated ash would be 6.9–12 × 10<sup>5</sup> t. Bottom ash accounted for 2.7–4.7 × 10<sup>5</sup> t, with circulated fluidized bed furnace-derived ash comprising > 60 % of the total. The estimated annual amount of ash suitable for fertilizer use was 6.2–11 × 10<sup>5</sup> t. The K content of WBA in 2026 was estimated to be 1.8 times larger than that in annually imported fertilizer. This K resource should be fully exploited and the efficient use of K extraction residue should be pursued to achieve an effective circular economy.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"195 ","pages":"Pages 275-283"},"PeriodicalIF":7.1,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143387200","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of time delay after alkaline cleaning treatment on the properties of polyelectrolyte-coated end-of-life polyamide membranes

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2025-02-10 DOI: 10.1016/j.wasman.2025.02.015

Luis A. Soto-Salcido, Joona Nieminen, Arto Pihlajamäki, Mika Mänttäri

{"title":"Effect of time delay after alkaline cleaning treatment on the properties of polyelectrolyte-coated end-of-life polyamide membranes","authors":"Luis A. Soto-Salcido, Joona Nieminen, Arto Pihlajamäki, Mika Mänttäri","doi":"10.1016/j.wasman.2025.02.015","DOIUrl":"10.1016/j.wasman.2025.02.015","url":null,"abstract":"<div><div>End-of-life (EoL) reverse osmosis (RO) membranes were regenerated by an extended alkaline cleaning treatment (ACT) followed by polyelectrolyte (PE) deposition (coating). The effect of time delay between the ACT and PE coating on the membranes’ stability and filtration properties was investigated. The permeance of the membranes increased more than twofold compared to the value exhibited by the EoL membrane before the ACT. Additionally, the surface charge decreased from −45 mV to −99 mV at pH 7.7, due to the ACT. However, the ACT-induced effects were predominantly time-dependent and were partially reversed over time. When the membrane was coated with one layer of polydiallyldimethylammonium chloride (PDADMAC) immediately after the ACT, the resulting membrane had approximately 800 g/mol molecular weight cut-off (MWCO) value and 30 L/(m<sup>2</sup> h bar) pressure-corrected flux (PCF). In comparison, if the membrane was stored in deionized (DI) water for five hours between the ACT and coating, the resulting membrane had again approximately 30 L/(m<sup>2</sup> h bar) PCF but a much higher 2,900 g/mol MWCO. Furthermore, the promptly coated membranes showcased better replicability and stability during storage, in comparison to the samples that were kept in water prior to coating.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"195 ","pages":"Pages 253-263"},"PeriodicalIF":7.1,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143376817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Contaminant detection in flexible polypropylene packaging waste using hyperspectral imaging and machine learning

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2025-02-10 DOI: 10.1016/j.wasman.2025.02.010

Giuseppe Bonifazi, Giuseppe Capobianco, Paola Cucuzza, Silvia Serranti

{"title":"Contaminant detection in flexible polypropylene packaging waste using hyperspectral imaging and machine learning","authors":"Giuseppe Bonifazi, Giuseppe Capobianco, Paola Cucuzza, Silvia Serranti","doi":"10.1016/j.wasman.2025.02.010","DOIUrl":"10.1016/j.wasman.2025.02.010","url":null,"abstract":"<div><div>Flexible plastic packaging (FPP) constitutes one of the largest post-consumer plastic streams processed in recycling facilities. To address the key challenges of its sorting and quality control, this study developed and tested a classification procedure based on hyperspectral imaging (HSI), combined with machine learning. The aim was to automatically detect contaminants (i.e., other polymers and materials) within a polypropylene (PP) stream of FPP waste (FPPW). Hyperspectral images of representative FPPW samples of PP and contaminants were acquired in the short-wave infrared range (SWIR: 1000–2500 nm) and preprocessed using different combinations of algorithms to emphasize their spectral characteristics. Principal component analysis (PCA) was applied as exploratory analysis of the spectral data followed by the application of a hierarchical classification model, based on partial least squares-discriminant analysis (Hi-PLS-DA), to differentiate between PP and other materials considered as contaminants, including polyethylene, polyester, polyethylene terephthalate, polystyrene, cellulose, polyurethane, aluminum and multilayer films. The results showed a classification accuracy of 87.5 %, with 147 out of 168 flakes correctly identified, as verified by Fourier transform-infrared (FT-IR) spectroscopy, demonstrating the model robust performance in distinguishing PP from other materials. Assuming all correctly identified particles are properly sorted, the model is predicted to achieve a Recovery of 98.2 % by weight for PP, indicating minimal material losses, with a Grade of 94.4 % by weight, representing a significant improvement compared to 77.2 % in the initial feed FPPW stream. This work demonstrated the effectiveness of HSI combined with Hi-PLS-DA in developing an automatic and efficient sorting and/or quality control process for FPPW, with minor classification errors occurring in filaments and multilayer flakes.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"195 ","pages":"Pages 264-274"},"PeriodicalIF":7.1,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143376818","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Substance flows of heavy metals in industrial-scale municipal solid waste incineration bottom ash treatment: A case study from Austria

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2025-02-09 DOI: 10.1016/j.wasman.2025.02.011

Simon Mika , Julia Mühl , Stefan Skutan , Philipp Aschenbrenner , Andreas Limbeck , Jakob Lederer

{"title":"Substance flows of heavy metals in industrial-scale municipal solid waste incineration bottom ash treatment: A case study from Austria","authors":"Simon Mika , Julia Mühl , Stefan Skutan , Philipp Aschenbrenner , Andreas Limbeck , Jakob Lederer","doi":"10.1016/j.wasman.2025.02.011","DOIUrl":"10.1016/j.wasman.2025.02.011","url":null,"abstract":"<div><div>While standard municipal solid waste incineration bottom ash (IBA) treatment aims to recover only ferrous and non-ferrous metals, enhanced treatment of IBA also promotes a recovery of glass and the mineral fraction. In this study, an enhanced dry-wet IBA treatment plant consisting of commonly applied dry process units, including several screens, a crusher, magnetic and eddy current separators and rarely applied wet process units, including a wet jigger, falcon concentrators and a wet shaking table, was evaluated for its ability to treat IBA from grate (G) and fluidized bed (FB) incineration. The process was examined on a material and substance flow level with regard to Ag, Cd, Co, Cr, Cu, Mn, Ni, Pb, Sb and Zn. It was found that the wet process units separated 52% of the total substance load of the aforementioned substances from G-IBA, while only 28% were separated from FB-IBA. The dry process units separated 57% from FB-IBA, while only 21% from G-IBA. The balance was found to remain in the mineral fraction of G-IBA (27%) or to be split between glass (7%) and mineral fraction (7%) of FB-IBA. While FB-IBA treatment was described for the first time on a substance flow level, transfer coefficients of 57–73% into the mineral fraction were reported for other G-IBA treatment plants for the substances investigated. Gravity separation was found to be able to promote the conservation of metallic resources and to deplete the total contents of heavy metals in the mineral fraction, which is favorable in terms of utilization.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"195 ","pages":"Pages 240-252"},"PeriodicalIF":7.1,"publicationDate":"2025-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143369732","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

引用次数: 0

ShARP-WasteSeg: A shape-aware approach to real-time segmentation of recyclables from cluttered construction and demolition waste

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2025-02-09 DOI: 10.1016/j.wasman.2025.02.006

Vineet Prasad, Mehrdad Arashpour

{"title":"ShARP-WasteSeg: A shape-aware approach to real-time segmentation of recyclables from cluttered construction and demolition waste","authors":"Vineet Prasad, Mehrdad Arashpour","doi":"10.1016/j.wasman.2025.02.006","DOIUrl":"10.1016/j.wasman.2025.02.006","url":null,"abstract":"<div><div>Instance segmentation is the fundamental computer vision task that facilitates robotic sorting by localizing object instances. This task becomes particularly challenging when dealing with Construction and Demolition Waste (CDW), as CDW objects often exhibit complex, non-uniform shapes and are frequently overlapped or occluded due to cluttering. Current waste segmentation benchmarks relying on fully connected networks for pixel-wise classification overlook crucial shape and boundary information. It is imperative to use shape information to guide mask prediction in order to improve waste segmentation accuracy. In response, this paper introduces ShARP-WasteSeg; a <u>Sh</u>ape-<u>A</u>ware <u>R</u>eal-Time <u>P</u>recise <u>Waste Seg</u>mentation framework. This conceptually straightforward approach mutually learns objects masks and boundaries within a single network, resulting in sharper mask predictions for complex recyclables despite cluttering. ShARP-WasteSeg enhances the segmentation process by extracting boundary features from depth maps, which are rich in shape and location information. These features complement RGB boundary features, guiding the final mask predictions through feature fusion. Moreover, it leverages the ground-breaking capabilities of cross-stage partial networks to optimize the feature extraction process, permitting real-time applicability of the multi-modal approach. Tested on a challenging CDW dataset representing real conditions, ShARP-WasteSeg improved Mask Average Precision (AP) by 7.91%, and the boundary-sensitive Boundary Average Precision by a significant 11.44%, demonstrating the effectiveness of the proposed shape-aware approach in increasing boundary quality of predicted masks for cluttered CDW recyclables.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"195 ","pages":"Pages 231-239"},"PeriodicalIF":7.1,"publicationDate":"2025-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143369648","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Assessing the feasibility of ocean plastic waste as secondary feedstock for the production of base chemicals

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2025-02-08 DOI: 10.1016/j.wasman.2025.02.003

Christina Kibuta , Oğuzhan Akin , Daniël Withoeck , Qing He , Mario Schmidt , Robin John Varghese , Martin Schlummer , Steven De Meester , Fatma Defne Calik , Mackenzie Denton , Andrea Buettner , Kevin M. Van Geem

{"title":"Assessing the feasibility of ocean plastic waste as secondary feedstock for the production of base chemicals","authors":"Christina Kibuta , Oğuzhan Akin , Daniël Withoeck , Qing He , Mario Schmidt , Robin John Varghese , Martin Schlummer , Steven De Meester , Fatma Defne Calik , Mackenzie Denton , Andrea Buettner , Kevin M. Van Geem","doi":"10.1016/j.wasman.2025.02.003","DOIUrl":"10.1016/j.wasman.2025.02.003","url":null,"abstract":"<div><div>Plastic pollution in the marine environment is a growing concern, with around 10 % of globally produced plastics ending up in oceans annually. Most ocean plastics are incinerated for energy recovery if harvested, since harvesting remains a key challenge. This study evaluated the feasibility of recovering base chemicals from the polyethylene (PE) and polypropylene (PP) fraction of ocean plastic waste through a single-step olefin production method. The approach employed a micropyrolyzer unit coupled with comprehensive two-dimensional gas chromatography (µP-GC × GC) and dual detectors to analyze gaseous product yields. Elemental and matrix analyses of the waste were performed using CHNS/O elemental analysis, Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES), and Combustion Ion Chromatography (CIC) to identify potentially harmful components. We present here the yields of critical light olefins such as ethylene (13 wt% from PE samples, 9 wt% from PP samples) and propylene (10 wt% from PE samples, 17 wt% from PP samples) at 700 °C. Pyrolysis products detected in PP samples included 24 wt% of branched olefins, whereas 54 wt% of linear olefins were detected in PE samples. The aromatics detected in the samples ranged between 1–3 wt%, with naphthene levels ranging between 4–7 wt%. Furthermore, metal contaminants, such asnickel, silicon, copper, iron, sodium, calcium, and potassium, were detected from the waste via ICP-OES, and chlorine levels via CIC. The results suggest that ocean plastic waste could serve as feedstock for production of light olefins, provided pre- and post-treatment procedures are implemented to mitigate contamination.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"195 ","pages":"Pages 167-176"},"PeriodicalIF":7.1,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143349192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

引用次数: 0