Journal of Material Cycles and Waste Management最新文献

Enhancing sustainable food literacy among restaurant staff may improve food waste management in the food service sector, as staff play a key role in food procurement, preparation, storage, and portioning. This cross-sectional study evaluated food waste management practices and the relationship between food wasting behaviours and sustainable food literacy among 170 staff from 27 restaurants in Burdur, Türkiye. Data were collected through face-to-face interviews using validated questionnaires. Most restaurants monitored food waste (92.6%), with bread identified as the most wasted food (70.6%). Food waste was primarily used for animal feeding (52.4%). Although knowledge of food banking was low (22.9%), willingness to participate increased to 70.0% after participants received information. Age was positively associated with sustainable food literacy and several food wasting behaviours (p < 0.05). Sustainable food literacy was positively associated with several food waste prevention behaviours (p < 0.05), whereas demographic characteristics showed no associations with food wasting behaviours. By simultaneously evaluating restaurant food waste management practices, staff food wasting behaviours, sustainable food literacy, and attitudes towards food banking, this study provides region-specific evidence suggesting that improving sustainable food literacy among restaurant staff may support the food waste prevention behaviours and more sustainable food waste management strategies in the food service sector.

During oil exploration, spills can cause significant environmental damage if not contained quickly. This study introduces an innovative solution that repurposes discarded polyurethane mattress foam for oil recovery from seawater, addressing two environmental issues simultaneously. The foams were enhanced through surface modifications with molybdenum disulfide (MoS₂) to improve their selectivity for oil. Characterization tests confirmed notable advancements in water rejection and oil affinity, with MoS₂ particles adhering well to the foam surfaces. Sorption tests in a seawater-oil mixture (92%-8% v/v) showed a remarkable increase in the sorption of petroleum (1.6x), S46 lubricating (7.1x), and 20W40 engine oil (9.8x), maintaining efficiency after 50 cycles of saturation and desorption. Kinetic studies indicated that the foams reached saturation within 40 s, demonstrating their potential as a rapid remediation solution. The pseudo-second-order and logistic models effectively described the experimental data (R² > 0.98 and R² > 0.99, respectively). Additionally, dripping loss kinetics indicated low oil loss from saturated foams, with only 0.85%, 0.90%, 4.24%, and 7.62% losses for diesel, petroleum, S46 lubricating, and 20W40 engine oil, respectively, after 30 s of hanging.

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The construction of a zero-waste city(ZWC) is a key strategy to address resource scarcity and achieve synergies in pollution reduction and carbon mitigation, making an accurate assessment of inter-city policy synergy (ICPS) and its drivers urgent. We develop a policy synergy indicator (PSI) using text mining and complex network analysis, applying the quadratic assignment procedure (QAP) model to examine the effects of political, economic, social, infrastructural, and geographic proximity factors on ICPS. We find that (1)ICPS varies substantially, with the strongest synergy observed between Shanghai and Tianjin, Ningbo, and Beijing, reaching values of 0.667, 0.665, and 0.604, respectively. Among the three key regions, the Yangtze River Delta (YRD) exhibits the highest level at 0.299, while the Pan-Pearl River Delta (PPRD) shows the lowest at 0.247. (2) All five dimensions significantly influence ICPS, particularly for mandatory policies and large cities. The administrative hierarchy exerts the strongest effect, whereby a 1% increase raises ICPS by approximately 0.406%. (3)The mechanisms promoting ICPS differ regionally. The Beijing-Tianjin-Hebei region and its periphery (BTH) rely primarily on administrative hierarchy and economic development, whereas the YRD and PPRD benefit from geographic proximity. These findings contribute to improving ICPS in the construction of ZWC.

The closure of the Cipeucang final disposal site (TPA) on 8 December 2025 triggered a waste-management crisis in South Tangerang City (Tangsel), a Jakarta satellite city generating about 1,100 tonnes of municipal solid waste per day. Building on a previously validated and optimised collection network, this study evaluates four post-closure relocation scenarios in terms of fleet size, round-trip frequency, fuel use, and operational cost. SC1 is the closed baseline (≈ 5 km haul to Cipeucang, reference only). SC2 routes all waste to TPSA Cilowong, Serang (≈ 65 km), reflecting the operational reality of 120 t/d carried by 30 trucks by February 2026. SC3 routes all waste to TPA Bangkonol, Pandeglang (≈ 82 km). SC4 is a 50:50 hybrid split between Cilowong and Bangkonol. The analysis shows that moving from SC1 to SC3 raises the annual operating cost by about 325% (from USD 0.90 million to USD 3.81 million per year) and reduces the effective round trips per truck per day from 2.3 to 0.6, forcing a 3.8-fold fleet expansion from 62 to 235 trucks to maintain the existing 367.5 t/d collection coverage; the SC4 hybrid requires 173 trucks (a 2.8-fold expansion). Among the long-haul options, SC4 offers the most robust per-tonne cost when both sites must be used, although routing all waste to the nearer Cilowong site (SC2) is the lowest-cost single-destination option. A transfer-station architecture (SC3+/SC4+) cuts the required fleet-expansion capital by 70–80%. These findings show that the four-year Rp 190.8 billion Bangkonol transport budget omits the transport operating cost (about 57% of the budget) and provide a transferable framework for the many Indonesian cities that must relocate their disposal sites under the national open-dumping closure mandate.

This study investigates how anaerobic granular sludge (AnGS) heat pretreatment duration (HPD, 0–1.5 h) at 100 °C and inoculum-to-substrate ratio (ISR, 0–0.5 v/v) interact to regulate Fe, Mg, and Ca availability and enhance hydrogen yield (HY) in the dark fermentation (DF) of food waste hydrolysate (FWH). A glucose solution (10 g/L) is used to assess HPD, while FWH evaluates ISR. ANOVA showed significant treatment effects for HY, and the Tukey test identified 0.5-h HPD and ISR 0.3 as optimal. 0.5-h HPD released Fe (35.50 mg/L), Mg (5.80 mg/L, and Ca (22.65 mg/L) from AnGS, yielding 0.53 mol H₂/mol glucose. Under optimal combined conditions, the initial DF contains Fe (18.77 mg/L), Mg (73.00 mg/L), and Ca (346.62 mg/L), reflecting contributions from the inoculum and FWH. This condition improved HY to 0.60 mol H₂/mol glucose equivalent, with butyric acid (3.43 g/L), acetic acid (0.68 g/L), and ethanol (0.11 g/L). Results highlight inoculum preparation and loading strategies to enhance DF-based waste-to-energy conversion.

In this study, vermistabilization of dairy processing sludge (DPS) was performed by mixing with cattle dung (CD) in 1:1 ratio and subjecting it to varying pre-composting periods of 7 days to 35 days for the three earthworm species, Eisenia fetida (E.F), Eudrilus eugeniae (E.E), and Perionyx excavatus (P.E). Pre-composting times of 3 weeks (DPS_21E.F), 2 weeks (DPS_14E.E), and 3 weeks (DPS_21P.E) gave optimal results for all three earthworms’ growth, reproduction, and composting efficiency in terms of total Kjeldahl nitrogen, total available phosphorus, and total potassium for the three species. E.F was found to have the most effective soil-builder capacity, which contributed to a higher seed germination index, 193% for Vigna radiata (mung bean), 197% for Raphanus sativus (radish), and 193% for Cucurbita pepo (pumpkin). LCA showed that vermicompost treatments resulted in climate change impacts of approximately 265, 272, and 276 kg CO₂-eq for E.F, E.E, and P.E, respectively, compared to approximately 415 kg CO₂-eq for synthetic urea. Terrestrial acidification impacts ranged from approximately 10.86–10.90 kg SO₂-eq for vermicompost treatments, whereas the urea system exhibited the highest impact at approximately 11.03 kg SO₂-eq, with additional contributions from natural gas–based fertilizer production.

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In this paper, the performance and feasibility of recycled construction and demolition waste (C&DW) using as aggregates of precast concrete piles in soft soil treatment scenario are evaluated. Firstly, the compressive strength, splitting tensile strength, elastic modulus and slump of recycled aggregate concrete (RAC) with different replacement rates of C&DW aggregates are studied at different water-cement ratios (w/c). Then, the durability of C&DW concrete piles is evaluated by the compressive strength, splitting tensile strength and mass changes with the time of RAC standard specimens respectively immersed in clean water, sulfate and fulvic acid solutions simulating different attack environments of soft soil foundation. Based on the experimental results, a Recurrent Neural Network (RNN) prediction model optimized by Particle Swarm Optimization (PSO) was developed. Its accuracy was subsequently verified by compared with that of Long Short-Term Memory (LSTM) neural networks and Support Vector Machine (SVM) algorithms, and the corresponding testing set. The deterioration mechanism is further investigated using scanning electron microscopy (SEM). The results show that the C&DW piles can meet the basic material performance requirements of precast concrete piles in the soft soil treatment, which extends the application range of C&DW and has significant potential of economic and environmental benefits.

The rapidly increasing expansion of lithium-ion batteries (LIBs) adoption has intensified the need for environmentally friendly end-of-life management of used cells. Although current recycling is dominated by the focus on cathode metals, the anode graphite component remains to be completely tapped despite its great energy and material worth. The review focuses on the emerging topic of functional upcycling of used anode graphite to reduced graphene oxide (rGO) for dual applications in battery system and electrochemical sensing. The structural and chemical transformation upon battery operation such defect creation, surface oxidation, and microcracking promote exfoliation efficiency and create active sites beneficial for subsequent application. We comprehensively summarize physical, chemical, and electrochemical recovery pathways with an emphasis on green acid leaching, thermal treatment, and electrochemical exfoliation that realize high recovery efficiency and programmable surface chemistry. We discuss mechanistic insight bridging structure and function, and evaluate the selectivity, sensitivity, and stability of these materials in real-world applications.

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A biocomposite basal fertilizer was developed from waste sheep wool and poultry litter incineration ash. The fertilizer, designated as WAsh (4.50:8.35:8.75), was characterized using SEM, XRD, PEDXRF, and FTIR techniques. Wheat was first grown with WAsh applied at 100 and 200 mg kg^− 1 P as a basal fertilizer, followed by maize cultivation in the same soil to assess residual effects. The WAsh significantly increased dry matter accumulation and nitrogen and phosphorus concentrations in both wheat and the subsequently grown maize. In wheat, shoot dry weight increased from 81.7 to 89.9 g per pot, N concentration from 6.79 to 11.6 g kg^− 1, and P concentration from 0.24 to 0.84 g kg^− 1. In the grains, P concentration rose from 2.71 to 4.09 g kg^− 1. In the second crop maize, dry weight increased from 15.4 to 45.3 g per pot and P concentration from 1.20 to 2.17 g kg^− 1, indicating that the residual effect of WAsh persisted strongly. Post-harvest soil analyses showed that WAsh increased plant-available P after both crops, slightly reduced soil pH, and elevated EC at higher doses. In conclusion, WAsh proved to be a slow-release, nutrient-rich organomineral fertilizer that enhances crop productivity and nutrient recycling while maintaining soil quality.

Municipal solid waste in Vietnam is still mostly landfilled. We compared two nutrient recovery routes: batch drum composting of organic market waste, and soil-like material (SLM) recovered from a closed landfill. In a single-drum pilot trial, compost inoculated with effective microorganisms (EM) reached a C: N ratio of 10.6:1 and 2.4% total nitrogen after 30 days, against 11:1 and 1.74% without EM. In pot trials with Brassica sp., soil amended with EM compost at 1:10 produced the tallest plants (8.0 cm stem length; control 1.8 cm), while SLM acted as a slow-release conditioner and roughly doubled biomass over the control. At 1:5, dry biomass fell by 11.9 to 16.7% for compost and 13.7% for SLM, mainly because of elevated electrical conductivity; the EC of SLM (5.2 dS/m) already exceeds the 4.0 dS/m phytotoxicity threshold before mixing. EM compost gave a direct net cash benefit of 2.0 to 3.5 million VND/t, rising to 4.5 to 7.0 million VND/t once agronomic value is counted, with an IRR of 18 to 28%. SLM earned less (0.5 to 1.2 million VND/t) but cost only 0.9 to 1.3 million VND/t to produce and scales easily. Compost suits urban agriculture; SLM suits bulk land reclamation.

Graphical Abstract