International Journal of Environmental Science and Technology最新文献_第9页

Spatiotemporal distributions of microplastics in Buffalo River, South Africa: abundance, characteristics and adsorption of heavy metals 南非布法罗河微塑料的时空分布：丰度、特征及对重金属的吸附

IF 3.4 4区环境科学与生态学

International Journal of Environmental Science and Technology Pub Date : 2025-03-11 DOI: 10.1007/s13762-025-06433-1

I. Mvovo, H. B. Magagula, O. O. Okoh

{"title":"Spatiotemporal distributions of microplastics in Buffalo River, South Africa: abundance, characteristics and adsorption of heavy metals","authors":"I. Mvovo, H. B. Magagula, O. O. Okoh","doi":"10.1007/s13762-025-06433-1","DOIUrl":"10.1007/s13762-025-06433-1","url":null,"abstract":"<div><p>The omnipresence of microplastic (MP) particles in environmental matrices of rivers is on the rise and has become a focal point of aquatic research. The study investigated the spatiotemporal distribution of MPs and adsorption of heavy metals (HMs) in the Buffalo River of South Africa. The findings of the study showed that a sum of 874 MPs was enumerated from the samples collected in the river system. The MP particles ranged between 0.35–0.75 particles·L<sup>−1</sup> during the dry winter and 0.3–0.9 particles·L<sup>−1</sup> in wet summer seasons in surface water. The range in sediments was 3–32 particles·kg<sup>−1</sup> and 2–23 particles·kg<sup>−1</sup> during the dry winter and wet summer seasons, respectively. The results showed that temporal rainfall patterns had a significant (<i>p</i> = 0.009 < 0.05) influence on MP abundances in sediments. Fibers and fragments were the main shapes, while polyethylene and polypropylene were ubiquitous. HMs such as nickel, copper, and iron with concentrations of 36.49 ± 3.96, 14.33 ± 0.87, and 356.47 ± 73.66 µg·g<sup>−1</sup> were adsorbed on surfaces of the microplastics, with iron being strongly correlated with the 3 mm and 1 mm size fractions and copper with the 2 mm fraction. The study has provided insights into the influence of climatic conditions on MP abundances and how plastics adsorb chemical pollutants such as HMs in environmental conditions. Moreover, the study has yielded baseline data on MP pollution in Buffalo River, which is helpful to the relevant authorities of the country’s ongoing River Health Program.</p></div>","PeriodicalId":589,"journal":{"name":"International Journal of Environmental Science and Technology","volume":"22 13","pages":"12691 - 12704"},"PeriodicalIF":3.4,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s13762-025-06433-1.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144814333","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparative assessment of endotoxin levels in drinking water: bioluminescence inhibition and Limulus Amebocyte Lysate (LAL) testing 饮用水中内毒素水平的比较评价：生物发光抑制和鲎试剂（LAL）检测

IF 3 4区环境科学与生态学

International Journal of Environmental Science and Technology Pub Date : 2025-03-11 DOI: 10.1007/s13762-025-06432-2

R. Dehghan, Kh. Piri, A. Abdoli

{"title":"Comparative assessment of endotoxin levels in drinking water: bioluminescence inhibition and Limulus Amebocyte Lysate (LAL) testing","authors":"R. Dehghan, Kh. Piri, A. Abdoli","doi":"10.1007/s13762-025-06432-2","DOIUrl":"10.1007/s13762-025-06432-2","url":null,"abstract":"<div><p>The Jajrood River serves as a crucial drinking water source for Tehran, Iran, necessitating regular monitoring of its pollution levels to safeguard public health. Endotoxin remains a significant pollutant of concern, adversely affecting water quality. This study evaluates two detection methods for endotoxin levels: traditional Limulus Amebocyte Lysate testing and a bioluminescence inhibition assay using <i>Vibrio fischeri</i>. The objective is to compare the efficiency and accuracy of these methods in assessing water quality in both the Jajrood River and a connected water treatment facility. The findings reveal that the <i>Vibrio fischeri</i> assay can detect endotoxin levels as low as < 1 EU/mL within 15 min, significantly faster than the 120 min required for Limulus Amebocyte Lysate testing. However, external environmental factors impacted the accuracy of the <i>Vibrio fischeri</i> results. Notably, strong correlations were observed between the two methods (r = 0.61 for the river; r = 0.46 for the treatment plant), underscoring the urgent need for enhanced monitoring strategies for drinking water in Tehran. This research highlights the potential of innovative detection methods to improve public health safety.</p></div>","PeriodicalId":589,"journal":{"name":"International Journal of Environmental Science and Technology","volume":"22 9","pages":"7739 - 7752"},"PeriodicalIF":3.0,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143904804","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}

引用次数: 0

Characterization of rice husk ash glass produced at low temperature as a sustainable alternative for the glass industry 稻壳灰玻璃在低温下作为玻璃工业的可持续替代品的特性

IF 3.4 4区环境科学与生态学

International Journal of Environmental Science and Technology Pub Date : 2025-03-11 DOI: 10.1007/s13762-025-06445-x

J. M. M. Marçal, M. R. Chim, I. M. Teixeira, L. E. G. Armas, S. Buchner, M. Vasconcellos, J. W. Menezes, C. Valsecchi

{"title":"Characterization of rice husk ash glass produced at low temperature as a sustainable alternative for the glass industry","authors":"J. M. M. Marçal, M. R. Chim, I. M. Teixeira, L. E. G. Armas, S. Buchner, M. Vasconcellos, J. W. Menezes, C. Valsecchi","doi":"10.1007/s13762-025-06445-x","DOIUrl":"10.1007/s13762-025-06445-x","url":null,"abstract":"<p>Glass is one of the most produced material worldwide, requiring silica from sand extracted from natural banks for its fabrication. Unfortunately, besides the environmental impacts of extracting this raw material, a future sand shortage was forecast. At the same time, the rice harvest produces, yearly, million tons of residue like the rice husk, or after burnt, the rice husk ashes (RHA). This residue, known to be rich in silica, is mostly abandoned in fields, also causing environmental problems. Thus, this study investigates the production of rice husk ash glass at low temperatures, evaluating its physical, chemical, and mechanical properties, as a viable alternative for the glass industry. Glasses were produced with two different source of RHA (industrial calcination and lab-controlled calcination), as well as commercial mineral (quartz) sand. The glasses were analyzed by FRX, XRD, DTA, EDS and compared by density, number of microbubbles, resistance to thermal shock and to acid attack. Overall, glasses produced with RHA showed morphological and thermos-chemical characteristics comparable or superior to glass produced with mineral sand, presenting promising properties for commercial feasibility. In addition, the low-temperature production reduces energy consumption and environmental impact: considerations about the environmental, economic and social impacts of this application are also discussed Thus, it can be concluded that rice husk ashes present itself as a viable sustainable alternative to mineral sand in glass production, looking at a possible zero-waste scenario.</p>","PeriodicalId":589,"journal":{"name":"International Journal of Environmental Science and Technology","volume":"22 13","pages":"12677 - 12690"},"PeriodicalIF":3.4,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144814332","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}

引用次数: 0

Sustainable removal of hydroxychloroquine from water using low-cost bioadsorbent from Cymbopogon citratus leaves 利用低成本的香茅叶生物吸附剂可持续地去除水中的羟氯喹

IF 3.4 4区环境科学与生态学

International Journal of Environmental Science and Technology Pub Date : 2025-03-08 DOI: 10.1007/s13762-025-06430-4

P. D. Macruz, R. P. Nippes

{"title":"Sustainable removal of hydroxychloroquine from water using low-cost bioadsorbent from Cymbopogon citratus leaves","authors":"P. D. Macruz, R. P. Nippes","doi":"10.1007/s13762-025-06430-4","DOIUrl":"10.1007/s13762-025-06430-4","url":null,"abstract":"<div><p>The removal of hazardous compounds, such as hydroxychloroquine (HCQ), from aqueous environments is essential for protecting aquatic ecosystems due to their potential harmful effects. This study aimed to evaluate the effectiveness of a low-cost bioadsorbent made from residual <i>Cymbopogon citratus</i> leaves for the removal of HCQ from water. The bioadsorbent was prepared under mild conditions and characterized physically and chemically. Batch adsorption experiments indicated that the bioadsorbent exhibited favorable characteristics, such as a specific area of 19.10 m<sup>2</sup> g⁻<sup>1</sup>, and the adsorption process was best described by the pseudo-second-order kinetic model and the Sips isotherm. The process was endothermic and non-spontaneous, favoring adsorption at neutral pH. Notably, the bioadsorbent could be regenerated with water for up to eight consecutive cycles, demonstrating its practical applicability. The maximum adsorption capacity of HCQ on the bioadsorbent ranged from 15.182 to 17.812 mg g⁻<sup>1</sup>, highlighting the potential of <i>Cymbopogon citratus</i> as an economical solution for contaminated water remediation.</p></div>","PeriodicalId":589,"journal":{"name":"International Journal of Environmental Science and Technology","volume":"22 13","pages":"12651 - 12660"},"PeriodicalIF":3.4,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144814265","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}

引用次数: 0

Analyzing the relationship between lichen biodiversity indicators and disturbances in investigating the quality of forest ecosystems 森林生态系统质量调查中地衣生物多样性指标与干扰的关系分析

IF 3 4区环境科学与生态学

International Journal of Environmental Science and Technology Pub Date : 2025-03-08 DOI: 10.1007/s13762-025-06421-5

S. Soleimannejad, M. Eshagh Nimvari, S.R. Safavi, F. Kazemnezhad, A. Sheikhulislami

{"title":"Analyzing the relationship between lichen biodiversity indicators and disturbances in investigating the quality of forest ecosystems","authors":"S. Soleimannejad, M. Eshagh Nimvari, S.R. Safavi, F. Kazemnezhad, A. Sheikhulislami","doi":"10.1007/s13762-025-06421-5","DOIUrl":"10.1007/s13762-025-06421-5","url":null,"abstract":"<div><p>Lichen communities were investigated due to the high sensitivity to disturbances and as one of the important indicators of measuring the quality and stability of forest ecosystems. The present study was carried out with the aim of investigating the quality of the Hyrcanian forest ecosystem in Mazandaran province in the north of Iran by analyzing the relationship between biodiversity indicators of lichen communities and disturbances. Two managed and unmanaged forests with relatively homogenous physiographic conditions were selected. In both forests, the types of disturbance, their location and the area of canopy gaps caused by them were recorded and calculated. Lichen samples were collected in these gaps using sampling quadrats. The results showed that the frequency of disturbances, the number of gaps, and the frequency of larger gaps in the managed forest were more than unmanaged. The number of lichen species, genera and families, as well as the diversity and richness of lichens in natural forests were more than managed. 7 indicator species of natural forests were recorded in these forests. Lichens <i>Ramalina sinensis</i> and <i>Melanelixia glabra</i> were recorded with the highest abundance in windfall tree disturbances and tree-harvesting disturbances in unmanaged and managed forests, respectively. Disturbances have affected the richness and diversity of lichens in the managed forest. The type of forest management has significantly affected the abundance, biodiversity and stability of vulnerable lichens.</p></div>","PeriodicalId":589,"journal":{"name":"International Journal of Environmental Science and Technology","volume":"22 9","pages":"7683 - 7700"},"PeriodicalIF":3.0,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143904758","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}

引用次数: 0

Sediment organic carbon influence heavy metal speciation in hirakud reservoir: case of a ramsar site in india 沉积物有机碳对hirakud水库重金属形态的影响：以印度拉姆萨尔遗址为例

IF 3.4 4区环境科学与生态学

International Journal of Environmental Science and Technology Pub Date : 2025-03-07 DOI: 10.1007/s13762-025-06426-0

S. Basti, C. Sahu, S. S. Pati, S. K. Sahu

{"title":"Sediment organic carbon influence heavy metal speciation in hirakud reservoir: case of a ramsar site in india","authors":"S. Basti, C. Sahu, S. S. Pati, S. K. Sahu","doi":"10.1007/s13762-025-06426-0","DOIUrl":"10.1007/s13762-025-06426-0","url":null,"abstract":"<div><p>Sediment organic carbon (OC) plays a pivotal role in manipulating the heavy metal geochemistry in an aquatic ecosystem. This work aimed to study the impact of different OC fractions on sediment heavy metal speciation and evaluate their relationship in Hirakud reservoir, India. The labile carbon fractionation was achieved following acid digestion of variable strengths. Similarly, the heavy metal speciation was carried out by single extraction process. The results revealed a significant impact of the OC fractions on heavy metal distribution (<i>p</i> < 0.05). The very labile (VL, 47.75%) and protein carbon (PC, 36.11%) fractions showed the highest contribution for the total OC and bio-polymeric carbon (BPC) respectively. On the other hand, the labile (9,06%), less labile (15.03%), and recalcitrant (28.16%) constituted the total OC. Similarly, carbohydrate carbon and lipid carbon made up 32.83 and 31.06% of the BPC respectively. The Fe–Mn geochemical pool (92.3%) was the most pronounced pool irrespective of heavy metals followed by the residual and organic matter-sulphide (OM-S, 46.15%) pools. The labile and lipid carbon fractions displayed significant correlations with the heavy metals (<i>p</i> < 0.05). The PCA and cluster analysis confirmed that except Mn, Mo, Ag, and Hg, all the other elements displayed associations with organic carbon. The bootstrap analysis revealed that the Fe–Mn bound geochemical pool was the most effective in controlling the heavy metal concentration while, the OM-S bound pool was responsible for heavy metal mobility. Therefore, it is ascertained that OC governs the distribution and functioning of the heavy metal pools in sediments.</p></div>","PeriodicalId":589,"journal":{"name":"International Journal of Environmental Science and Technology","volume":"22 13","pages":"12637 - 12650"},"PeriodicalIF":3.4,"publicationDate":"2025-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144814416","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}

引用次数: 0

Biorefinery practice for valorizing Mediterranean bloomed Pterocladia capillacea into valued and sustainable bioproducts with numerous green solicitations 将地中海开花的毛缕蕨转化为有价值的、可持续的生物产品的生物炼制实践

IF 3.4 4区环境科学与生态学

International Journal of Environmental Science and Technology Pub Date : 2025-03-04 DOI: 10.1007/s13762-024-06319-8

N. Sh. El-Gendy, H. N. Nassar, A. R. Ismail, H. R. Ali, B. A. Ali, K. M. Abdelsalam, M. Mubarak

{"title":"Biorefinery practice for valorizing Mediterranean bloomed Pterocladia capillacea into valued and sustainable bioproducts with numerous green solicitations","authors":"N. Sh. El-Gendy, H. N. Nassar, A. R. Ismail, H. R. Ali, B. A. Ali, K. M. Abdelsalam, M. Mubarak","doi":"10.1007/s13762-024-06319-8","DOIUrl":"10.1007/s13762-024-06319-8","url":null,"abstract":"<div><p>As a solution for ecosystem bioremediation from the gigantic red seaweed proliferation across the Mediterranean shorelines, this work investigates the effective utilization of <i>Pterocladia capillacea </i>to produce different esteemed and viable bioproducts. The nutritional composition of approximately 6.88 ± 0.31%, 20.15 ± 0.2%, 42.16 ± 0.3%, and 2.51 ± 0.05% (w:w) protein, fiber, carbohydrate, and lipid, respectively, promotes its application in the human food and animal fodder industries. Its N + P<sub>2</sub>O<sub>5</sub> + K<sub>2</sub>O, undesirable heavy metals, organic carbon, and organic matter contents of 5.48 ± 0.07%, 2.82 ± 0.15 mg/kg, 16.11 ± 0.15%, and 27.71 ± 0.26% are all within the ranges allowed by the Egyptian standard for organic fertilizer. Its calorific value of 16.16 ± 0.5 MJ/kg and relatively low ash and heavy metals contents are in accordance with the international standards for primary solid biofuel. Its relatively high holocellulose content of 44 ± 0.5% (w/w) recommends its applicability in the liquid biofuels sector. Further, via a pioneering practice, a sequential, eco-friendly, and fully integrated bioprocess<i> Pt. capillacea</i> biomass is valorized into natural pigments of approximately 5.05 ± 0.05 mg/g total chlorophyll, 2.12 ± 0.05 mg/g carotenoids, phycobiliproteins of approximately 1.33 ± 0.05 mg/g phycocyanin, 3.07 ± 0.05 mg/g allophycocyanin, and 0.97 ± 0.05 mg/g phycoerythrin, hydrocolloids of approximately 28.21 ± 2.5% carrageenan and 20.46 ± 1.5% agar, and finally cellulose of approximately 20.15 ± 1.5%. Additionally, the extracted carrageenan proved an efficient antimicrobial action against pathogenic microorganisms that supports its use for water densification, food packing, and wound dressing.</p></div>","PeriodicalId":589,"journal":{"name":"International Journal of Environmental Science and Technology","volume":"22 14","pages":"13483 - 13504"},"PeriodicalIF":3.4,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s13762-024-06319-8.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145028290","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nutrient recovery from UASB effluent: impacts on Capsicum chinense growth, nutrient accumulation, and productivity UASB废水的养分回收：对辣椒生长、养分积累和生产力的影响

IF 3.4 4区环境科学与生态学

International Journal of Environmental Science and Technology Pub Date : 2025-03-04 DOI: 10.1007/s13762-025-06420-6

M. H. G. Ribeiro, K. K. Barros, L. Florencio, W. R. M. Leite, M. T. Kato

{"title":"Nutrient recovery from UASB effluent: impacts on Capsicum chinense growth, nutrient accumulation, and productivity","authors":"M. H. G. Ribeiro, K. K. Barros, L. Florencio, W. R. M. Leite, M. T. Kato","doi":"10.1007/s13762-025-06420-6","DOIUrl":"10.1007/s13762-025-06420-6","url":null,"abstract":"<div><p>The use of treated domestic wastewater produced in an upflow anaerobic sludge blanket (UASB) reactor is very attractive since it offers a water source with high concentration of nutrients that can meet the nutritional requirements of plants and positively impact the viability of agricultural production. Chili pepper (<i>Capsicum chinense</i>) is an important crop for family farming in the Brazilian semiarid region. This work aimed to evaluate its cultivation when irrigated with treated UASB effluent, with and without mineral fertilization. No significant differences were observed in the experimental treatments concerning plant height, stem diameter, and P, K, Na, and total chlorophyll contents in leaf tissue. However, the experiment of fertigation with treated sewage using 75% of the recommended dose for pepper cultivation showed the highest dry biomass production (88.40 ± 6.57 g). The highest N and S contents (32.82 and 5.07 g kg<sup>−1</sup>, respectively) were found in plants irrigated with treated sewage and using mineral fertilizer; their results were significantly different from those found for plants irrigated with water only. The highest fruit yields were obtained in two treatments of plants irrigated with treated sewage (54 to 60 fruits in T3 and T4, respectively); as well as the highest crop yields (1.38 to 1.45 tons ha<sup>−1</sup>, respectively). The study on <i>Capsicum chinense</i> highlights how using treated wastewater alone or combined with mineral fertilization can support its field cultivation, improve water sustainability and reduce reliance on chemical fertilizers. These findings offer a pathway to enhance large-scale production while maintaining resource efficiency and agricultural resilience.</p></div>","PeriodicalId":589,"journal":{"name":"International Journal of Environmental Science and Technology","volume":"22 13","pages":"12613 - 12624"},"PeriodicalIF":3.4,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144814327","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}

引用次数: 0

Enhanced hexavalent chromium (VI) removal from water using nano zero valent iron modified orange peel powder biochar 纳米零价铁改性橙皮粉生物炭对水中六价铬的去除效果研究

IF 3.4 4区环境科学与生态学

International Journal of Environmental Science and Technology Pub Date : 2025-03-04 DOI: 10.1007/s13762-025-06381-w

S. U. Gill, M. A. Inam, R. Iftikhar, F. Nadeem, H. Amjad, Z. Khalid

{"title":"Enhanced hexavalent chromium (VI) removal from water using nano zero valent iron modified orange peel powder biochar","authors":"S. U. Gill, M. A. Inam, R. Iftikhar, F. Nadeem, H. Amjad, Z. Khalid","doi":"10.1007/s13762-025-06381-w","DOIUrl":"10.1007/s13762-025-06381-w","url":null,"abstract":"<div><p>In current research, we examined hexavalent chromium removal performance under various solution chemistries using raw biochar (BC) and nano zero valent iron modified orange peel powder biochar (nZVI@BC) composites derived via thermal pyrolysis. The results indicated comparable Cr(VI) removal performance (> 90%) of nZVI@BC (1:3) than other composites ratios, which presented similar sorption behavior. However, the much greater effective surface area, small particle size and uneven particle distribution of nZVI@BC (1:3) composite ensued significantly higher Cr(VI) removal (94.1%) than that of raw BC (71.7%), hence selected for further evaluation. The adsorbent dosage (4 g/L), pH (2) and reaction time (120 min) for suspensions with 20 mg/L Cr(VI) concentration were observed to be optimum Cr(VI) removal conditions. For both adsorbents, Freundlich and Pseudo-second order model fitted better with experimental sorption data. nZVI@BC (1:3) showed better adsorption affinity towards Cr(VI) even after three successive regeneration cycles while in the co-existence of interfering ions it showed high selectivity toward Cr(VI) species. The dominant Cr(VI) removal mechanism was identified to be physio-chemisorption and complexation reactions with additional reduction pathway using nZVI@BC than raw BC, as revealed by FT-IR and XRD analysis of spent adsorbents. In general, current research may provide efficient solutions to the drinking water industry for remediation of Cr(VI) from polluted water using best suitable nZVI@BC composite, thereby reducing its associated environmental health and ecological risks.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":589,"journal":{"name":"International Journal of Environmental Science and Technology","volume":"22 13","pages":"12599 - 12612"},"PeriodicalIF":3.4,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144814339","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}

引用次数: 0

Predicting plant distribution on the River Nile islands in Egypt using machine learning algorithms 利用机器学习算法预测埃及尼罗河岛屿上的植物分布

IF 3.4 4区环境科学与生态学

International Journal of Environmental Science and Technology Pub Date : 2025-03-02 DOI: 10.1007/s13762-025-06412-6

T. A. Nahool, F. A. A. Ayed, D. A. Ahmed, M. G. Sheded

引用次数: 0