Mild pyrolysis of high-density polyethylene (HDPE) can produce wax-rich intermediates, but selectivity is governed by cracking severity. This study examined the effects of in situ low-pressure steam and wood biochar on HDPE product distribution in a...
The acid durability of recycled-aggregate concrete (RAC) remains largely undocumented in sub-Saharan Africa, and the small, collinear datasets of such campaigns are rarely released. Three concretes (natural, partially recycled and fully recycled) wer...
The rapid increase in the production and consumption of electronic and electrical equipment has resulted in a significant global increase in electronic waste (e-waste). This complex waste stream has valuable rare earth elements, precious metals, and...
Spent lithium-ion battery (LIB) cathodes were investigated as a multimetallic resource for catalyst precursor synthesis. Cathode material was leached under ultrasound using citric or sulfuric acid, with and without H2O2, to compare metal recovery, st...
Eco-Industrial Parks (EIPs) operate as networks for exchanging by-products. This study identifies, from the scientific literature, the critical success factors (CSFs) reported for EIP formation. Fifty factor statements from five documents are consoli...
Reintegrating plastic waste from waste electrical and electronic equipment (WEEE) into production cycles remains challenging because flame retardants (FRs) can restrict its reuse. FRs are essential for fire safety in electrical and electronic equipme...
Platinum group metals (PGMs) are key components of automotive emission-control catalysts, and spent automotive catalysts (SACs) are their main secondary source. This paper reviews hydrometallurgical, pyrometallurgical, magnetic-separation, biometallu...
The recycling rate of steel across different industry sectors in the United States was calculated using statistical dynamic material flow models, covering the period from 1950 to 2060. Analysis focused on four industry sectors: construction, industri...
With increasing interest in wire additive technologies for titanium parts, there is increasing demand for low-cost wire from secondary sources, of which there is an abundance. In this investigation, both machining swarf and out-of-specification AM co...
Discarded fishing gear accumulating in marine and coastal environments poses a significant threat to marine ecosystems, particularly in Mediterranean countries such as Greece, and is increasing at an alarming rate. Therefore, sustainable management a...
Wood modification has been developed as a non-biocidal concept to overcome inherent material limitations such as dimensional instability and biological durability. But sustainability assessment must extend beyond initial functional performance to inc...
Maturity models help small and medium-sized enterprises (SMEs) plan their transition toward a circular economy, but existing models were developed mainly for manufacturing firms in industrialized countries and culminate in circularity rather than reg...
Ordinary Portland cement (OPC) is associated with considerable energy demand for its production and accounts for approximately 8% of the global CO2 emissions. The extensive extraction of natural aggregates further undermines the sustainability of con...
The transition from fossil-based plastics to bioplastics in food packaging requires not only technological advances but also coherent regulatory frameworks and economic support mechanisms. This review examines how policies, production costs, and indu...
Mechanical recycling of post-consumer poly(ethylene terephthalate)/high-density polyethylene (PET/HDPE) streams is limited by immiscibility and processing-sensitive behavior. A nominal 30 wt% PET/70 wt% HDPE blend was evaluated using a 2 × 3 fa...
Non-contaminated plastic waste from healthcare facilities is largely non-infectious and rich in recoverable polymers, yet it is routinely incinerated because no automated sorting process suited to the clinical setting has been established. This paper...
In Colombia, annual sugarcane bagasse (SCB) generation reaches 10.86 Mt, and the residue has a higher heating value (HHV) of approximately 13.0 MJ kg−1. This study evaluated SCB catalytic pyrolysis using natural clinoptilolite (CLI) modified by...
Concrete production consumes vast quantities of natural aggregate and potable water, while coastal dredging produces hundreds of millions of cubic meters of underutilized marine sediments and sea sand annually. This study aims to provide a review on...
Effective recycling requires sorting at the point of disposal, yet existing systems fail to combine multi-class material identification, physical sorting actuation, and low hardware cost within a single unit while remaining sensitive to real-world ac...
Refractory gold ores containing arsenic are difficult to process using conventional beneficiation and cyanide-leaching technologies. They often have a relatively low content of silicon dioxide (no more than 60%) and also contain arsenic. Therefore, t...
The textile industry generates tens of millions of tonnes of textile waste annually, a large proportion of which comprises poly(ethylene terephthalate) (PET) fibres. Although recycled PET textiles are commercially available, these materials are almos...
Mushroom cultivation offers a sustainable route to convert agro-industrial residues into nutritious food while reducing environmental waste. Macrocybe indica (basionym Calocybe indica) is a particularly attractive basidiomycete for mushroom productio...
European packaging policy is built almost entirely around treatment, while the accompanying prevention obligation lacks an equivalent apparatus of measurable objectives. This article addresses this upstream question directly: what determines the quan...
The widespread use of methylene blue (MB) has contributed to water pollution. This study evaluates steam-activated pine wood biochar for efficient MB removal from aqueous solutions. Biochar samples were produced by pyrolysis at temperatures ranging f...
Electronic waste is a concentrated secondary source of Ag, Au, and Cu. Still, its suitability for environmental sensing depends not only on extraction efficiency but also on material quality, processability, reproducibility, and demonstrated analytic...
The transition to a circular economy in the chemical industry generates not only resource efficiency gains but also new economic and criminological risks. This article adopts an analytical framework to examine the circular value chain and the windows...
Chicken feathers are a poultry by-product rich in keratin, a recalcitrant protein whose valorization requires efficient solubilization. This study evaluated gamma irradiation as a pretreatment for enhancing the enzymatic susceptibility and extraction...
Agroindustrial lignocellulosic residues represent potential secondary resources, but their response to a common fractionation process can vary substantially with feedstock composition. This study evaluated organosolv processing of coconut fiber, maiz...
Nowadays, global attention has increasingly focused on environmentally friendly technologies and the valorization of non-marketable food materials. In blackberry production, approximately 30% of the harvested fruit may be lost due to damage during ha...
Circular recovery decisions for aged strengthening systems require evidence that distinguishes loss of installed function from exhaustion of constituent value. Conventional durability studies rarely translate residual mechanical states into end-of-li...
Plastic production has increased 200-fold since the 1950s due to its versatility and lightweight properties, yet only 9% of global plastic waste is recycled. Upcycling waste plastics into feedstock for 3D printing offers a potentially promising strat...
This paper presents the results of lithium extraction from a lithium-containing precipitate obtained by the sulfation roasting of rare-metal production tailings, leaching of the sulfate roast product, and subsequent precipitation. Unlike the conventi...
Rapid urbanization in developing countries intensifies solid waste management (SWM) challenges and demands integrated sustainability approaches. This study examines institutional actors’ perceptions of SWM governance and waste-to-construction-m...
In the present paper, a route for the simultaneous recovery of Fe, Cu, and Zn from the leaching filtrate of copper flotation tailings through controlled co-precipitation into a single magnetic ferrite-like product is proposed. Unlike conventional seq...
Reuse is widely regarded as a primary strategy to mitigate plastic packaging waste, occupying a higher position than recycling in the waste hierarchy. However, most existing circularity indicators do not include reuse or include it only as an inferio...
Wind turbine blade composites represent a growing end-of-life (EoL) waste challenge because thermoset blades lack commercially mature recycling routes, whereas thermoplastic blades offer improved recyclability through dissolution. This study compares...
The coarse Fe-containing intermetallics (IMCs) induced by excessive Fe levels seriously degrade the mechanical and corrosion properties of recycled aluminum alloys. Controlling the nucleation and growth behavior has been confirmed as effective in ref...
Jarosite residues generated during zinc hydrometallurgy may retain valuable metals such as silver within complex and poorly accessible mineral phases. In this study, hydrated reline, a choline chloride–urea natural deep eutectic solvent (NADES)...
The Australian construction industry generated approximately 29.2 million metric tonnes (Mt) of construction and demolition waste (C&DW) in 2022–2023, of which about 23.7 Mt (81.2%) was recovered, primarily through recycling (80.6%). Recove...
Metal-bearing tailings, slimes, metallurgical residues, spent catalysts, ashes, sludges, batteries, and electronic wastes are increasingly important secondary resources, but recovery is constrained by low and variable grades, fine particles, complex...
This study constructs a multi-level evaluation framework for sustainable cosmetic packaging design, guided by environmental, social, and governance (ESG) principles. The framework integrates sustainable packaging principles with the Environmental (E)...
The use of hybrid fiber reinforcement has been investigated to enhance the performance of gypsum-based materials, taking advantage of several types of fibers. This study develops hybrid fiber-reinforced gypsum composites (HFRGCs) incorporating sixtee...
Background: The transition from conventional waste management to circular economy systems has generated more interest in how artificial intelligence (AI) can enhance waste prevention, sorting and recycling, optimization, and resource recovery. Owing...
Fish is a food of high nutritional value, being an important source of proteins, fat, vitamins, and essential minerals. Atlantic horse mackerel is also rich in omega-3 polyunsaturated fatty acids (n3-PUFAs), recognized for their benefits to cardiovas...
This study measures construction waste management efficiency (CWME) in 27 EU member states (2016–2025) using a three-stage super-efficiency SBM-DEA model, constructs a spatial correlation network via a modified gravity model, and employs social...
Winery activities generate large amounts of residues requiring sustainable management. Anaerobic digestion offers opportunities for resource recovery while reducing the environmental burdens associated with these residues. This study presents a gate-...
Fly ash-TiO2 composites were obtained by sol–gel, and their catalytic performance was evaluated on removal of organic loading and expressed as Chemical Oxygen Demand (COD) from real wastewater samples. SEM, X-ray fluorescence, XRD, IR, Raman an...
Research on recycling and waste governance has produced extensive knowledge about the factors influencing environmentally responsible behavior. Studies examine strategies—including feedback systems, incentives, social norms, gamification, and c...
The increasing accumulation of polyethylene terephthalate (PET) bottles represents a significant environmental challenge due to their high consumption and limited recovery. The purpose of this study was to develop a sustainable alternative for reusin...
Food waste digestate is a high-moisture organic residue that requires effective stabilization before resource recovery or land application. This engineering-scale study compared high aeration (HA, 0.30 L·min−1·kg−1 dry matte...
