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The fate and mobility of chromium, arsenic and zinc in municipal sewage sludge during the co-pyrolysis process with organic and inorganic chlorides.
Sci Rep
January 2025
Institute of Science and High Technology and Environmental Sciences, Graduate University of Advanced Technology, Kerman, Iran.
Co-pyrolysis is an efficient approach for municipal sewage sludge (SS) treatment, facilitating the production of biochar and promoting the stabilization and removal of heavy metals, particularly when combined with chlorinated materials. This study explores the impact of pyrolysis temperatures (400 °C and 600 °C) and chlorinated additives (polyvinyl chloride (PVC) as an organic chloride source and ferric chloride (FeCl) as an inorganic chloride source) at 10% and 20% concentrations, on the yield, chemical speciation, leachability, and ecological risks of arsenic (As), chromium (Cr), and zinc (Zn) in biochar derived from SS. The results revealed that increasing the pyrolysis temperature from 400 to 600 °C significantly reduced biochar yield due to enhanced volatilization of organic components, as well as the removal of heavy metals in interaction with chlorinated materials.
View Article and Find Full Text PDFEstimation of GHGs emission from traditional kilns charcoal production in northwestern Ethiopia: Implications on climate change.
Heliyon
December 2024
Center of Environment and Development, College of Development Studies, Addis Ababa University, Addis Ababa, P.O.Box 1176, Addis Ababa, Ethiopia.
Rural areas in Ethiopia serve as the primary source of charcoal for urban populations, mainly produced using traditional kilns. However, this traditional method significantly contributes to greenhouse gas (GHG) emissions, exacerbating climate change and deforestation. While banning charcoal production is not currently feasible in Ethiopia because of the lack of affordable alternative energy sources (fuel), improving the efficiency of the traditional production system can mitigate the climate impact caused by charcoal production.
View Article and Find Full Text PDFSmart estimation of protective antioxidant enzymes' activity in savory (Satureja rechingeri L.) under drought stress and soil amendments.
BMC Plant Biol
January 2025
Department of Agricultural Science, Biotechnology and Food Science, Cyprus University of Technology, Limassol, 3036, Cyprus.
Savory (Satureja rechingeri L.) is one of Iran's most important medicinal plants, having low irrigation needs, and thus is considered one of the most valuable plants for cultivation in arid and semi-arid regions, especially under drought conditions. The current research was carried out to develop a genetic algorithm-based artificial neural network (ΑΝΝ) model able of simulating the levels of antioxidants in savory when using soil amendments [biochar (BC) and superabsorbent (SA)] under drought.
View Article and Find Full Text PDFAdsorption properties and mechanisms of Cd by co-pyrolysis composite material derived from peanut biochar and tailing waste.
Environ Geochem Health
January 2025
College of Resource and Environmental Engineering, Hubei Key Laboratory for Efficient Utilization and Agglomeration of Metallurgic Mineral Resource, Wuhan University of Science and Technology, Wuhan, 430081, People's Republic of China.
Article Synopsis
- Cadmium contamination in aquatic systems is a major environmental issue, and this study introduces a new hybrid material called Fe-TWBC, made from combining solid waste iron tailings and biochar through co-pyrolysis.
- Characterization analyses indicated that the metal oxides from iron tailings were effectively integrated into the biochar, enhancing its surface functionality.
- The Fe-TWBC demonstrated a significantly higher capacity for cadmium adsorption (95.06 mg·g) compared to both pristine biochar and iron tailings, and adsorption behavior was consistent with established kinetic and isotherm models, showcasing its potential for environmental cleanup and sustainable waste utilization.
Novel insights into released hydrochar particle derived from typical high nitrogen waste biomass: Special properties, microstructure and formation mechanism.
Waste Manag
February 2025
Key Laboratory of Agro-Environment in Downstream of Yangtze Plain/Scientific Observing and Experimental Station of Arable Land Conservation (Jiangsu), Ministry of Agriculture and Rural Affairs, Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China. Electronic address:
Article Synopsis
- Hydrothermal carbonization (HTC) transforms waste biomass, particularly high nitrogen feedstocks like kitchen garbage and blue-green algae, into valuable resources, but the characteristics of small hydrochar particles remain underexplored.
- Hydrochar particles show unique properties such as poor porosity, moderate pH, negative charge, and high hydrophobicity, which differ from the original hydrochar and secondary char derived from simpler biomasses.
- The study identifies complex formation mechanisms through various chemical reactions in the hydrochar microparticles, highlighting their potential as soil fertilizers and decontaminants while emphasizing that effectiveness is influenced by HTC temperature and type of biomass used.
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