International Journal of Environmental Research最新文献

{"title":"Role of Pyrolysis Temperature on Arsenic and Lead Leaching Potential in a Biochar-Amended Sediment","authors":"Matheus Bortolanza Soares, José Roberto Ferreira, Marina Colzato, Luís Reynaldo Ferracciú Alleoni","doi":"10.1007/s41742-024-00604-7","DOIUrl":"https://doi.org/10.1007/s41742-024-00604-7","url":null,"abstract":"<p>The leaching of contaminants is a complex, pivotal process for understanding how biochar can immobilize them effectively. In this study, we investigated the impact of biochar, produced at different temperatures, on the behavior of arsenic (As) and lead (Pb) in leached sediments. Before leaching, we combined biochar with sediment, allowing it to naturally age for 365 days. The biochar derived from sugarcane straw was pyrolyzed at 350 °C (BC350), 550 °C (BC550), and 750 °C (BC750). Using UV–Vis spectroscopy, we assessed changes in dissolved organic carbon quality and examined geochemical alterations employing high-performance liquid chromatography–inductively coupled plasma mass spectrometry (HPLC–ICP-MS). The addition of biochar decreased Pb mobility while increasing As mobility. The extent of immobilization varied depending on the pyrolysis temperature: BC750 notably reduced Pb leaching by 54%, whereas BC350 enhanced As mobility by 2.5 times. Although no leaching of monomethylarsonic or dimethylarsinic acids occurred, both BC350 and BC750 amplified As³⁺ leaching by 2.5 times. In summary, biochar addition at different temperatures altered the environmental fate of As and Pb. Higher pyrolysis temperatures, as seen with BC750, were more effective in mitigating Pb mobility, reducing sediment leaching by 54%. Interestingly, exogenous dissolved organic carbon and phosphorus promoted As leaching.</p>","PeriodicalId":14121,"journal":{"name":"International Journal of Environmental Research","volume":"9 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2024-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140626998","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

{"title":"Microenvironment of Landfill-Mined Soil-Like Fractions (LMSF): Evaluating the Polymer Composting Potential Using Metagenomics and Geoenvironmental Characterization","authors":"Arnab Banerjee, Charakho N. Chah, Manoj Kumar Dhal, Kshitij Madhu, Kiran Vilas Dhobale, Bharat Rattan, Vimal Katiyar, Sreedeep Sekharan","doi":"10.1007/s41742-024-00598-2","DOIUrl":"https://doi.org/10.1007/s41742-024-00598-2","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The search for potent plastic-degrading bacteria has been a focal point of research over the recent decades to develop sustainable methods for plastic waste management. Despite promising results at the laboratory scale, replicating the same at the field scale has been limited. Natural extremophilic conditions of the landfill host many plastic-degrading bacteria, and recently, culture-independent Next-Generation Sequencing metagenomics approaches are being adopted to screen them and exploit their utilities. However, one of the main challenges is the difficulty in designing the optimum artificial test conditions for understanding the growth and metabolic activities of the concerned microorganisms. In the current study using precision metagenomics, genes coding for PET and PHA degrading enzymes were screened from a landfill-mined soil-like fraction (LMSF) sample, with landfill soil under a freshly deposited waste dump acting as the control. Subsequently, thorough geoenvironmental characterization of the samples was performed to generate an understanding of the growth conditions of the microorganisms. Genes encoding for MHETase outpopulated the genes encoding for PETase in LMSF, while the reverse trend was observed in the control. The abundance and taxonomic distribution of the hosts containing genes of PETase and MHETase enzymes in the samples, when co-related with the FTIR spectra of the samples, indicated that the PET residues might have possibly degraded to MHET under natural conditions. Usually, commercial composts, which are already a market-ready product for the agriculture sector, are used for polymer composting, which is not sustainable in the long run. The structural and functional patterns of the microbes obtained in the metagenomics study and permissible levels of leachable heavy metals generate promise for the landfill-mined soil-like fractions to be potentially used for polymer degradation. Alongside this, the presence of a monotypic oceanic genus Plesiocystis in the landfill environment was confirmed, which is of utmost importance to the field of microbial ecology.</p><h3 data-test=\"abstract-sub-heading\">Graphical Abstract</h3>","PeriodicalId":14121,"journal":{"name":"International Journal of Environmental Research","volume":"12 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2024-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140630575","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

{"title":"Effects of Copper Doping on the Electrochemical Performance of Tin Oxide Synthesised by Facile Co-precipitation Root","authors":"George Mathew, Prerana Chamoli, Abin Philip, Arumugam Ruban Kumar","doi":"10.1007/s41742-024-00587-5","DOIUrl":"https://doi.org/10.1007/s41742-024-00587-5","url":null,"abstract":"<p>The development of stable electrodes with significant capacitance is necessary for the commercial viability of supercapacitors, which have generated a lot of interest. Metal oxides are a promising material because they have multiple valence shells for charge transfer, a high theoretical specific capacitance, and variable redox properties. Because of this, we explore, for the first time to the best of our knowledge, the effects of Copper (Cu) doping on the super capacitive performance of tin oxide (SnO₂). The pure, 2%, 7%, and 15% Cu-doped SnO₂ are synthesised by facile coprecipitation. We demonstrate a maximum electrochemical performance for 2% Cu-doped sample with a specific capacitance of 27.099 F/g at a sweep rate of 10 mV s⁻¹, while further increase in doping levels had a negative impact on the capacitive performance of SnO₂. The specific capacitance vale was found to be decreased with an increase in Cu concentration, which could be explained by the increasing trend found in the charge transfer resistance upon doping as observed from electrochemical impedance spectroscopy, the resistance increased from 5.85 to 7.19 Ω. The perfect reversible behaviour of a pseudocapacitor is estimated from the highly symmetric nature of chronopotentiometry (GCD) curves and the pseudo behaviour is further confirmed from the cyclic voltammetry curve with an excellent potential window of 1.3 V.</p>","PeriodicalId":14121,"journal":{"name":"International Journal of Environmental Research","volume":"17 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2024-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140613888","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

{"title":"Adaptation and Resistance of Microbial Communities to Antibiotic Contamination in the Surrounding Environment of a Sustainable Pig Farm","authors":"Miaomiao Yan, Jinghua Xu, Xiaofeng Li, Ying Feng, Jinping Jiang, Yongshan Chen","doi":"10.1007/s41742-024-00601-w","DOIUrl":"https://doi.org/10.1007/s41742-024-00601-w","url":null,"abstract":"<p>An investigation was conducted in the vicinity of a sustainable pig farm to assess the presence of antibiotics through SPE-HPLC/MS/MS, microbial communities via Illumina high-throughput sequencing, and antibiotic resistance genes using SmartChip technology. The study revealed that tetracyclines were the predominant antibiotics detected in the soil and sediment surrounding the pig farm, with residual concentrations ranging from 33.3 to 1244.2 μg∙kg⁻¹. The most prevalent phyla identified at various sampling sites were Firmicutes, Chloroflexi, Proteobacteria, Actinobacteria, and Acidobacteria. A total of 188 antibiotic resistance genes (ARGs) and 9 mobile genetic elements were found in the sediment, with aminoglycoside (particularly aadA2-03), sulfonamide (specifically sul2), and tetracycline (particularly tetX) resistance genes being the most frequently observed. The presence of tetracycline residue was observed to influence the composition of the microbial community, whereas no significant association was found between antibiotics and ARGs. Examination of the correlation between ARGs and bacteria at the phylum level demonstrated that Cyanobacteria, Acidobacteria, Planctomycetota, and Gemmatimonadota were the predominant phyla associated with ARG presence near an intensive pig farm. Notably, Cyanobacteria may function as a continual reservoir and/or shelter for ARGs, thereby potentially contributing to the dissemination of ARGs in the sediment environment in close proximity to a pig farm. This study presents evidence of the ecological risks posed by antibiotics in a pig farm-cropland system, highlighting the connection between microbial community structure and ARGs. Therefore, the issue of antibiotic residues must be factored into the sustainability of animal husbandry practices.</p>","PeriodicalId":14121,"journal":{"name":"International Journal of Environmental Research","volume":"99 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2024-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140613884","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

{"title":"Impacts of Different Amendments and Water Qualities on Soluble and Exchangeable Phases and Hydraulic Conductivity of a Calcareous Soil","authors":"Fattaneh Moradi, Ali Ashraf Amirinejad, Faranak Ranjbar","doi":"10.1007/s41742-024-00600-x","DOIUrl":"https://doi.org/10.1007/s41742-024-00600-x","url":null,"abstract":"<p>This study aimed to evaluate the effect of nanoclay (NC), zeolite (Z), biochar (B), municipal waste compost (MWC), and farmyard manure (FYM) at two application levels of 1% and 3% (w/w) on the saturated hydraulic conductivity (<i>K</i>_S) and sodification process of a calcareous soil under leaching by waters with different electrical conductivity (EC) and sodium absorption ratio (SAR) values. Columns containing control and amended soils were washed in three separate experiments using 20 pore volumes of three solutions classified in C3S1, C4S3, and C4S4 classes. The incorporation of the amendments led to a significant decrease in soil sodification because of decreasing exchangeable sodium and increasing exchangeable calcium. The exchangeable sodium percentage (ESP) of soils after leaching by solutions C3S1, C4S3, and C4S4 varied in the ranges of 1.80–5.79%, 2.78–7.85%, and 3.66–15.6%, respectively. The highest and lowest ESP values were obtained for control and 3% FYM treatment, respectively. For each leaching solution, the <i>K</i>_S was significantly higher in the control compared to the amended soils (<i>P</i> ≤ 0.05). The lowest value of <i>K</i>_S was obtained for the 3% B treatment. Furthermore, <i>K</i>_S values increased with an increase in SAR of water. This was likely due to the simultaneous increase in EC and concentration of divalent cations (calcium and magnesium). The most effective amendments in controlling soil sodification were FYM, B, and MWC at the application level of 3%. </p>","PeriodicalId":14121,"journal":{"name":"International Journal of Environmental Research","volume":"2 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2024-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140568352","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

{"title":"Comprehensively Assessing PM2.5 Exposure Across Mainland China with Estimated Concentrations Considering Spatial Aggregation","authors":"Xuelin Li, Jingfei Huang, Yi Zhang, Siwei Zhai, Xinyue Tian, Sheng Li, Wei Wang, Tao Zhang, Fei Yin, Yue Ma","doi":"10.1007/s41742-024-00603-8","DOIUrl":"https://doi.org/10.1007/s41742-024-00603-8","url":null,"abstract":"<p>PM_2.5 is a main air pollutant in China. Considering the unevenly distributed PM_2.5 and population in China, an accurate assessment of PM_2.5 exposure is needed. In this study, the population-weighted exposure (PWE) is used to measure the overall PM_2.5 exposure based on 2766 counties across mainland China. The population exposure risk (PER) is used to better assess the partial PM_2.5 exposure risk level for residents at the county level. The PM_2.5 PWE and PER are calculated with the latest 2020 census data and the predicted concentrations estimated by spatial models considering both the geographic similarities and aggregation. The PWE differed from the concentrations across China, especially in four heavily polluted regions and three detected high-concentration clusters. In China, the average PM_2.5 PWE in 2019 was 39.46 μg/m³, 2.41 μg/m³ higher than the mean concentration (37.05 μg/m³). The exposure in three detected clusters was much higher than in the Sichuan Basin (SCB), the Pearl River Delta (PRD), and the Yangtze River Delta (YRD), suggesting the focus of environmental governance should not only be the traditional heavily polluted areas according to administrative divisions. Regions with high concentrations also differed from regions with high PM_2.5 exposure risk. The counties with higher PM_2.5 PER were located in east-central and eastern coastal China, different from the distribution of concentrations. This study clarified the necessity of considering spatial aggregation of PM_2.5 in LUR models and also emphasized the importance of calculating PM_2.5 PWE as exposures in further health effect assessments.</p>","PeriodicalId":14121,"journal":{"name":"International Journal of Environmental Research","volume":"1 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2024-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140568172","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

{"title":"Applying Natural and K-Enriched Zeolite Before Struvite Precipitation Improved the Recovery of NH4+ from Liquid Digestate and the Reagent Use Efficiency","authors":"Giulio Galamini, Giacomo Ferretti, Valeria Medoro, Negar Eftekhari, Marco Favero, Barbara Faccini, Massimo Coltorti","doi":"10.1007/s41742-024-00595-5","DOIUrl":"https://doi.org/10.1007/s41742-024-00595-5","url":null,"abstract":"<p>Implementing nutrient recycling in wastewater treatment plants is essential for sustainable agriculture. In this study, we investigated a biphasic treatment system for anaerobic liquid digestate, which involved natural and K-enriched zeolite for NH₄⁺ recovery (phase 1), followed by struvite crystallization under two conditions: NH₄⁺ excess and Mg²⁺ excess (phase 2). The adsorption of NH₄⁺ by natural zeolite enabled saving Mg and P reagents, used to achieve target Mg:NH₄:PO₄ ratios. The reagent use efficiency of struvite precipitation was highest with natural zeolite under NH₄⁺ excess conditions (96%), whereas the other treatments exhibited lower yields. In this condition, the digestate enriched in Ca²⁺ released by zeolite; however, no P interferences occurred (Ca²⁺/Mg²⁺ &lt; 0.5). Fractions of Ca²⁺ precipitated as CaCO₃. Both the isomorphic NH₄- and K-struvite occurred, distinguished by calibrating XRPD data (total struvite) with N contents (indicative of NH₄⁺-struvite). The precipitates comprised NH₄- and K-struvite at 60% and 30% (calcite at 9%) in the treatment that involved natural zeolite, 65% and 35% with the K-exchanged zeolite, due to higher presence of K⁺. Concerning the chemical evolution of the treated digestate, fewer alterations occurred for inorganic ions in the treatment that involved natural zeolite (phase 1) with NH₄⁺ excess condition (phase 2), besides for unreacted SO₄^2– derived from the Mg reagent. The recovered zeolite was enriched in N at 0.5%. Struvite precipitates met the EU regulations regarding permissible levels of organic C, P content, and heavy metal impurities, thereby potentially enabling its use as a fertilizer.</p>","PeriodicalId":14121,"journal":{"name":"International Journal of Environmental Research","volume":"52 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2024-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140568250","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

{"title":"Woody Biomass-Derived Biochar Decorated with Vanadium Oxide as a Potential Adsorbent for CO2 Capture","authors":"Nuradibah Mohd Amer, Pooya Lahijani, Maedeh Mohammadi, Abdul Rahman Mohamed, Shahreen Izwan Anthonysamy","doi":"10.1007/s41742-024-00605-6","DOIUrl":"https://doi.org/10.1007/s41742-024-00605-6","url":null,"abstract":"<p>This study examines the production of metallized biochar as a cost-effective and sustainable adsorbent with a high carbon dioxide (CO₂) uptake at ambient temperature. Leucaena wood (LW)-derived biochar was prepared at various pyrolysis temperatures (500, 700, and 900 °C) for 90 min. Among all, highly microporous LW biochar, pyrolyzed at 900 °C, showed the highest CO₂ adsorption capacity of 52.18 mg/g at 30 °C, 1 bar This biochar was further impregnated with ammonium metavanadate solution at different concentrations (1, 3, 4, 5 and 8 wt%) and then heated at 500 °C to obtain vanadium oxide-deposited biochar. The metal deposition of 3 wt% increased the CO₂ adsorption capacity of the biochar to 71.85 mg/g under the same adsorption conditions, which can be attributed to the significant contribution of vanadium oxide to CO₂ chemisorption. Here, vanadium oxide could create oxygen vacancy on the LW surface which further react with CO₂ in the atmosphere. Kinetic studies revealed that the Avrami model could accurately predict the CO₂ adsorption behaviour, indicating both physisorption and chemisorption contributed to the adsorption. The activation energy for CO₂ uptake was calculated at around − 8.04 kJ/mol. The sustainable performance of metallized biochar was demonstrated in several cycles of CO₂ adsorption–desorption. In addition, this adsorbent showed high affinity towards CO₂ over air, CH₄ and N₂. The results of this study present the prospective potential of this sustainable adsorbent for large-scale post-combustion CO₂ capture.</p>","PeriodicalId":14121,"journal":{"name":"International Journal of Environmental Research","volume":"5 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2024-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140568248","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

{"title":"Chinese Rural Landscapes at Multiple Scales: Typologies and Diversity","authors":"Yehan Li, Yuan Zhou, Ruihong Cai, Chongyu Wang, Xuefei Wu","doi":"10.1007/s41742-024-00591-9","DOIUrl":"https://doi.org/10.1007/s41742-024-00591-9","url":null,"abstract":"<p>Due to the increased demand for agricultural products, the agricultural industry has become intensified, resulting in a homogenization of the rural landscape. Our study defines rural landscape types at three scales (national, regional, and local) using a multi-scale method. We generated three landscape element datasets using literature and gray statistical analysis. Subsequently, we used the overlay approach and two-step cluster analysis to identify landscape regions, types, and subtypes. The findings indicate the presence of 47 landscape regions at the national scale, 448 landscape types at the regional scale, and 44 landscape subtypes at the local scale with Dahongshan Mountain Region serving as the empirical study site. Furthermore, we have developed a novel method to evaluate landscape diversity index (LDI) which utilizes the proportion of land area occupied by landscape elements in various landscape types. This method incorporates diverse elements, such as topography, landform, land cover/use, vegetation, and agroforestry industries. To examine the role of LDI in landscape planning, we analyzed the relationship between LDI and recreation services using the geographically weighted regression model. The result facilitates landscape planning and management at different administrative levels.</p>","PeriodicalId":14121,"journal":{"name":"International Journal of Environmental Research","volume":"55 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2024-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140568162","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

{"title":"Insight Into the Effects of Environmental and Structural Factors on the Re-Oxidation of Cr(III) Hydroxides","authors":"Min Qu, Huixia Chen, Hongling Zhang, Shuai Jiao, Hongbin Xu","doi":"10.1007/s41742-024-00581-x","DOIUrl":"https://doi.org/10.1007/s41742-024-00581-x","url":null,"abstract":"<p>Chromium hydroxide is an important form present in chromium chemicals and a major product in the reduction of hexavalent chromium pollutants, and the study of chromium hydroxide re-oxidation process is crucial in controlling chromium pollution. The aim of this research was to investigate the re-oxidation performance of different forms of chromium hydroxide in air: crystalline chromium hydroxide (C-Cr(OH)₃), amorphous chromium hydroxide (A-Cr(OH)₃), chromium hydroxide obtained by reduction (R-Cr(OH)₃), and aged R-Cr(OH)₃ (Aged-R-Cr(OH)₃). The results showed that A-Cr(OH)₃ had the highest re-oxidation efficiency and the largest re-oxidation rate constant (<i>k</i>), followed by R-Cr(OH)₃, Aged-R-Cr(OH)₃, and C-Cr(OH)₃. The study found that the re-oxidation rate of chromium hydroxide was mainly affected by the surface Cr–O bond energy and physical water. The advantageous re-oxidation of chromium hydroxide could be attributed to its diminutive bond energy of Cr–O and the presence of physical water on its surface. It was observed that increasing the temperature and adding salt (Na₂SO₄ and Na₂CO₄) promoted the re-oxidation of Cr(III) for different chromium hydroxides. This effect was particularly noticeable under alkaline conditions induced by Na₂CO₃ or at a reaction temperature of 200 °C. The re-oxidation rate constant of chromium hydroxides was up to 39.4 times higher at a reaction temperature of 200 °C than at 80 °C. This would be of great significance for chromium contamination removal by controlling the hexavalent chromium reduction products and environmental conditions.</p>","PeriodicalId":14121,"journal":{"name":"International Journal of Environmental Research","volume":"1520 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2024-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140568244","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}