South Korea is pursuing an energy transition policy (ETP) of expanding the use of renewable energy and natural gas and decreasing that of nuclear energy and coal in total generation. An investigation of whether the public is for or against the ETP is needed by the government. This article explores the public preference toward the ETP employing the data collected through a survey of 1000 individuals. They were asked to reveal their preference for the ETP on a five-point scale in the survey. Overall, there are more advocates of the ETP than those who opposed it. For the purpose of analyzing the determinants of advocacy and opposition of the ETP, an ordered probit model is employed. The results suggest that people living in the Seoul Metropolitan area think that the environment is more important than new jobs, or know the renewable energy 100% campaign before the survey is more favorable to the ETP than others. However, people who use electricity for heating tend to be negative about the ETP. As the age increases, people approve of the ETP, but when age goes beyond a certain level, they oppose it.

Nitrate, nitrite, and nitrosamines intake from the diet creates human health risks. In this study, nitrate/nitrite intake from diet and its association with nitric oxide (NO) level in humans have been surveyed. Besides nitrate/nitrite, nitrosamines risks were also determined from the diet. This study was conducted as a pilot study; 33 heathy adults participated in and completed the Food Frequency Questionnaire (FFQ) for 3 days. Then, concentrations of nitrate, nitrite, and nitrosamines were studied by the literature review. Also, the association between the intake of nitrate and nitrite with salivary and urinary NO was evaluated by Bayesian bi-variate analysis. Then, the health risk was assessed for nitrate/nitrite from food groups and drinking water, and nitrosamines from food groups based on hazard index (HI) and cancer risk with the Monte Carlo simulation. The nitrate/nitrite intakes had no association with NO level in the saliva and urine samples. The mean of HI value for the mean of 3 days was 3.57 and 0.32 from food groups and drinking water, respectively. The cancer risk amount of nitrosamines from food groups was (1.74 to 2.22) × 10⁻³ based on 95% confidence interval (CI 95%) values. This study showed the Iranian diet had a high risk, but drinking water consumption was safe based on nitrate/nitrite and nitrosamines for humans. There is a need to determine the concentration of nitrosamines in drinking water in Iran and to recommend for decrease risk of nitrate, nitrite, and nitrosamines exposure by food groups.

This paper investigates the impact of economic growth, energy consumption, tourism, trade openness, and population density on the ecological footprints in Thailand over the period from 1974 to 2016. We applied the augmented Dickey–Fuller and Zivot–Andrews unit root tests to check the stationary properties of the data. The ARDL bounding test approach and VECM Granger causality were used to investigate (i) the long-run and short-run effects and (ii) directions of such effects respectively. The long-run results showed that economic growth, energy consumption, and trade openness have positive relationships with the ecological footprint, while tourism and population density are negatively associated with the ecological footprint in Thailand. The results of VECM Granger causality confirmed that the bidirectional causality (i) between tourism and population density in the long run and (ii) between trade openness and population density in the short run. Furthermore, the unidirectional causality runs from the ecological footprint, economic growth, energy consumption, and trade openness to tourism and population density in the long run. The country policy combined with economic growth, energy consumption, tourism, international trade, and population density perspectives need to be revisited towards sustainable development by mitigating the effects of these variables on environmental depletion especially the ecological footprint. Graphical abstract

A combined coagulation and γ-Al₂O₃ catalytic ozonation process was used to treat semi-aerobic aged refuse biofilter (SAARB) effluent from treating mature landfill leachate. First, the coagulant providing the best pretreatment performance was selected. Then, the coagulated SAARB leachate was further treated in an optimized γ-Al₂O₃-catalyzed ozonation process. Characteristics of the γ-Al₂O₃-catalyzed ozonation process were determined, and a reaction mechanism was proposed. FeCl₃ provided the best treatment efficiency (chemical oxygen demand (COD) removal of 65.8%, absorbance at 254 nm (UV₂₅₄) removal of 68.55%, and color number (CN) removal of 79.4%). Under optimized O₃ dosage (18.92 mg/min) and γ-Al₂O₃ dosage (10 g/L), efficiencies of removing COD, UV₂₅₄, and CN were 54.3%, 82.9%, and 95.9%, respectively, at 30 min. In addition, spectral analysis indicated that fulvic-like substances in ultraviolet and visible regions were effectively degraded in the γ-Al₂O₃-O₃ process and some smaller organic products were produced. Characterization of γ-Al₂O₃ showed that γ-Al₂O₃ was relative stable; its morphology and constituent elements did not change much after reaction. In addition, ozonation capacity was enhanced by heterogeneous catalytic effects of γ-Al₂O₃. The combined coagulation and γ-Al₂O₃ catalytic ozonation process was proven to be an efficient treatment method for removing bio-refractory organic matter contained in SAARB leachate.

Thermal treatment offers an alternative method for the separation of Al foil and cathode materials during spent lithium-ion batteries (LIBs) recycling. In this work, the pyrolysis behavior of cathode from spent LIBs was investigated using advanced thermogravimetric Fourier transformed infrared spectroscopy coupled with gas chromatography-mass spectrometer (TG-FTIR-GC/MS) method. The fate of fluorine present in spent batteries was probed as well. TG analysis showed that the cathode decomposition displayed a three-stage process. The temperatures of maximum mass loss rate were located at 470 °C and 599 °C, respectively. FTIR analysis revealed that the release of CO₂ increased as the temperature rose from 195 to 928 °C. However, the evolution of H₂O showed a decreasing trend when the temperature increased to above 599 °C. The release of fluoride derivatives also exhibited a decreasing trend, and they were not detected after temperatures increasing to above 470 °C. GC-MS analysis indicated that the release of H₂O and CO displayed a similar trend, with larger releasing intensity at the first two stages. The evolution of 1,4-difluorobenzene and 1,3,5-trifluorobenzene also displayed a similar trend—larger releasing intensity at the first two stages. However, the release of CO₂ showed a different trend, with the largest release intensity at the third stage, as did the release of 1,2,4-trifluorobenzene, with the release mainly focused at the temperature of 300–400 °C. The release intensities of 1,2,4-trifluorobenzene and 1,3,5-trifluorobenzene were comparable, although smaller than that of 1,4-difluorobenzene. This study will offer practical support for the large-scale recycling of spent LIBs.

This work is the first study about the joint effect (influence) of carbon dioxide emissions (CO₂) from transport and anemia influence on under-five mortality in the Republic of Benin. We focused on that interaction effect and provide scientific pieces of evidence through multiple linear and multinomial regression models. Therefore, the World Bank yearly data about Benin has been used. Time series analysis and co-integration checking were done to deepen the study. The interaction of anemia and CO₂ emissions from transport influences positively under-five mortality (U5M) rate (p = 0.00). Findings reveal that when CO₂ emissions from transport and anemia increase of 1 unit in a given year, Benin is likely to have 10 deaths over 1000 live births higher on the under-five mortality rate the following year.

The Ce-doped different MoO₃ [conventional molybdenum oxide (con-MoO₃) or nano molybdenum oxide (nano-MoO₃) and synthetic molybdenum oxide (syn-MoO₃)] modification of ZSM-5 catalyst synthesized by different preparation methods (the combination of grinding and ion-exchange method and the combination of impregnation and ion-exchange method) was studied on selective catalytic reduction (SCR) of NOₓ with NH₃. The results demonstrated that the SCR performance of the prepared Ce-doped syn-MoO₃ modification of ZSM-5 catalyst [Ce(0.9%)-syn-MoO₃(6%)/ZSM-5] by the combination of impregnation and ion-exchange method was better than Ce-doped con-MoO₃ modification of ZSM-5 [Ce(0.9%)-con-MoO₃(6%)/ZSM-5] and Ce-doped nano-MoO₃ modification of ZSM-5 [Ce(0.9%)-nano-MoO₃(6%)/ZSM-5] via the combination of grinding and ion-exchange method, especially when the temperature window is 200–350 °C. That is because it is easy to form Mo-O-Al by the smaller sized MoO₃ more easily interacting well with Brønsted acid under calcining temperature, which results in the decrease of Brønsted acid sites in the catalyst. Combing with the binding energy of Mo for all the catalysts, the combination of Mo and Al (Mo-O-Al) altered the chemical environment around the Mo species. Furthermore, Ce(0.9%)-syn-MoO₃(6%)/ZSM-5 exhibited excellent sulfur resistance.

Salmonella is a common zoonotic pathogen. Few studies have explored the effects of biochar on the survival of Salmonella in soil. Biochar made by pig manure at different temperatures were applied to four typical vegetable soils to investigate the survival dynamics of Salmonella. The results showed that the survival of Salmonella in latosol, red soil, and black soil was significantly promoted after biochar addition, but not in brown soil. The pyrolysis temperature of biochar had great effects on the survival of Salmonella. The survival time of Salmonella in the soil with biochar at 300°C was longer than that at 500 °C and 700 °C. The longest survival time of Salmonella was observed in Latosol with 300 °C biochar (111.36 days). Correlation analysis showed that soil pH, organic matter, and total nitrogen content were significantly positively correlated with the survival time of Salmonella in vegetable soils without biochar. However, the content of total potassium was the main controlling factor affecting the survival dynamics of Salmonella in soils with biochar.

Competition in today’s market is the most important concern of companies and producers in free markets. Buyers are also looking for higher quality and lower prices. Manufacturers should, therefore, reduce production costs and increase budgets for research and product development. On the other hand, the limitation of mineral resources in each country and in the world in general is a very important factor for increasing the price of raw materials which increases the cost of production of a product. In this study, a green aspect of decision-making, concurrent modeling for inventory-routing, and application of maximum entropy (ME) method for overcoming uncertainties of demands are applied to optimize the usage of raw materials and returning of defective products to the production cycle in a closed-looped supply chain under multi-period planning horizon. Also, dynamic modeling is used to balance the inventory level in all stages of the network that leads to optimum usage of the raw materials. For this purpose, the first objective function reduces production, transportation-routing, and inventory costs, and the second objective reduces greenhouse gas emissions through all levels of the network. Finally, this model is solved by using the exact solution method with the help of Gams software as well as the non-dominated sorting genetic algorithm II (NSGAII) and multi-objective particle swarm optimization (MOPSO) algorithm. Sensitivity analysis has been performed on failure rates, greenhouse gas emissions during recycling and production, and the optimistic-pessimistic coefficient of the ME solution method. Solution methods have been compared using several criteria, and the NSGAII method has finally obtained the best result. The results show that the manager should pay more costs in order to prevent backorder demands. Also, collecting the more defective products leads to increasing production amount since the collective products can return to the production line. Finally, it is required for the managers to control products’ failure rate to optimize capacity usage in the model.

The adaption of the open-up reform policies in China some three decades ago has resulted in a rapid economic transformation of which the tourism sector has equally witnessed fast development. Therefore, the essence of this article is to review the evolution and expansion of the tourism industry in China and its obligation to observing international sustainable development policies and practices. Indications of the current policy regime, establishment, and institutions, sustainable development strategies to ensure continuity and availability of resources for future use, environmental sustainability laws and regulations, and promotional events for the development of the tourism industry are made available in this article. In effect, this article reviews how the activities of the tourism sector impacts on the environment. The findings show that China in its quest to be a world leader of tourists’ destination has impacted negatively on the environment which by extension affect the economy and society at large. On the other hand, as a leading nation in the United Nations, China has in contemporary times adapted sustainable development strategies to help safeguard the environment. However, more needs to be done in the area of advanced technology and renewable energy.