Environmental Nanotechnology, Monitoring and Management最新文献

{"title":"Evaluating the influences of seasonal water hydrochemistry variations and biochar-assisted heavy metal removal in Delhi’s urban wetlands: Implications for management strategies","authors":"Gourav Sharma,&nbsp;Abhishek Kumar Chaubey,&nbsp;Kamal Kishor,&nbsp;Dinesh Mohan","doi":"10.1016/j.enmm.2024.101025","DOIUrl":"10.1016/j.enmm.2024.101025","url":null,"abstract":"<div><div>Wetlands globally, crucial to both society and the environment, are losing their ecological and hydrological functions due to growing human populations and activities. This decline is particularly severe in metropolitan wetlands, where land use changes and development pressures are more intense. This study focuses on evaluating the water quality parameters of Delhi’s five urban wetlands including Hauz Khas Lake (HZL), Sanjay Lake (SL), Bhalswa Lake (BL), Vasant Kunj Lake (VKL), and Sanjay Van Lake (SVL) during winter (14—17^th January 2023) and summer (13—15^th May 2023) seasons. A total of 200 samples (20 samples from each lake) from HZL, SL, BL, VKL, and SVL were collected and analysed for 24 physicochemical parameters in both the seasons. Multivariate analysis was performed using a correlation matrix and principal component analysis (PCA)–biplot. Hydrochemical analysis was performed using Piper trilinear and Gibbs diagrams. Water suitability for irrigation was accessed using the chlorinity index, sodium adsorption ratio (SAR), Wilcox diagram, and Kelly index/ratio. Suitability for industrial purposes was evaluated using the Langelier saturation index (LSI) and Ryznar stability index (RSI). Drinking water suitability was assessed through the water quality index (WQI). The average (n = 3) water quality parameter values were compared to BIS and WHO drinking water standards. The average pH for HZL, SL, BL, VKL and SVL was alkaline (ranging from 7.2 to 9.9) in both the seasons. In winter, 4 parameters exceeded BIS permissible limits in HZL, 9 in SL, 12 in BL, 7 in VKL, and 6 in SVL. A similar trend was observed in summer, indicating that SVL and HZL are less polluted than SL, BL, and VKL. The chlorinity index, SAR, Kelly ratio, and Wilcox diagram indicated BL water’s unsuitability for irrigation in both seasons. RSI values above 8 for HZL, SL, BL, VKL, and SVL suggest corrosive nature of the water samples collected in both seasons. The main factors affecting the WQI were heavy metals (primarily Cd²⁺, Cr_T, Ni²⁺, Pb²⁺) and fluoride contamination. Finally, Himalayan pine needle biochar was prepared and used for <span><math><mrow><msup><mrow><mi>P</mi><mi>b</mi></mrow><mrow><mn>2</mn><mo>+</mo></mrow></msup></mrow></math></span> remediation from wetland water samples collected in both seasons. The findings of this study provide valuable insights into the water quality characteristics of the five wetlands during two seasons, aiding in water management and decision-making processes for sustainable utilization and conservation of water resources.</div></div>","PeriodicalId":11716,"journal":{"name":"Environmental Nanotechnology, Monitoring and Management","volume":"23 ","pages":"Article 101025"},"PeriodicalIF":0.0,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143104516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Metal nanoparticles in flaxseed and orange Waste: Sustainable Applications as Antimicrobial agents in water treatment systems","authors":"Jumara Silva de Sousa ,&nbsp;Alessandra Marjorie de Oliveira ,&nbsp;Nicole Novelli do Nascimento ,&nbsp;Rosângela Bergamasco ,&nbsp;Benício Alves de Abreu Filho ,&nbsp;Angélica Marquetotti Salcedo Vieira","doi":"10.1016/j.enmm.2024.101024","DOIUrl":"10.1016/j.enmm.2024.101024","url":null,"abstract":"<div><div>The generation of agro-industrial waste has become a growing concern due to the high volume generated, which can result in increased environmental pollution. In this respect, the reuse of these materials as adsorbents would contribute to environmental sustainability. Flaxseed and orange waste are co-products that can be given added value when functionalized with metallic nanoparticles that have an antibacterial action, becoming an alternative for water contaminated by pathogenic microorganisms, an increasingly recurring problem in the world due to the quality of the water consumed and distributed to the population. Therefore, the main objective of this study was to develop adsorbents with brown flaxseed and orange peel waste impregnated with copper and silver nanoparticles using green synthesis to evaluate the antibacterial activity of these adsorbents against two bacterial strains, <em>Escherichia coli</em> and <em>Pseudomonas aeruginosa</em>, in contaminated water. For the synthesis of the nanomaterials, copper and silver nitrates were used as precursors, and <em>Moringa oleifera</em> leaf extract as a reducing agent. For the microbiological tests, MIC and MBC were initially evaluated. Subsequently, adsorption, bacterial growth curve, and time-kill tests were carried out for <em>E. coli</em> and <em>P. aeruginosa</em>. The antibacterial and bactericidal activities of the functionalized materials were demonstrated. The proposed adsorption mechanism reported that increasing the mass favored a higher percentage of bacterial reduction. However, the adsorbents functionalized with copper oxide nanoparticles showed better results against the bacteria under study, using the lowest mass of material (0.05 g), achieving a 99 % reduction of bacterial biomass after 24 h of treatment. In addition, the inhibition of <em>E. coli</em> and <em>P. aeruginosa</em> biomass was effectively observed after 2 h of treatment, demonstrating that these materials have a high potential for controlling these microorganisms in water.</div></div>","PeriodicalId":11716,"journal":{"name":"Environmental Nanotechnology, Monitoring and Management","volume":"22 ","pages":"Article 101024"},"PeriodicalIF":0.0,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142703921","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An integrated approach towards groundwater quality and human health risk assessment in the Indo-Gangetic plains of West Bengal, India","authors":"Pallavi Mukherjee ,&nbsp;Sangeeta Sunar ,&nbsp;Priti Saha,&nbsp;Sarmistha Saha,&nbsp;Suvanka Dutta,&nbsp;Syed Yakub Ali","doi":"10.1016/j.enmm.2024.101022","DOIUrl":"10.1016/j.enmm.2024.101022","url":null,"abstract":"<div><div>The escalating crisis emerging from overuse and pollution of groundwater is hitting India hard as the nation relies substantially on groundwater as a crucial freshwater resource. The lower Ganga Basin in West Bengal, India is a hotspot for arsenic and fluoride pollution in groundwater. This study assesses the lower Ganga basins’ groundwater quality in West Bengal, its characteristics and impact on human health, using a conglomeration of tools and techniques. The entire study area, covering 666 points, has been segregated into 10 sub-basins. As per EWQI analysis, 69% of the total points under study indicated excellent water quality whereas 9% showed very poor water quality with Arsenic concentration being the major factor influencing the groundwater quality followed by iron, nitrate and sulphate. The mean Total Health Index (THI) for infants, females, children and males was calculated to be 4.05, 2.21, 2.04 and 2.02 respectively depicting infants to be most susceptible to health hazards arising out of intake of polluted groundwater. Bhairabh-Jalangi emerged as the most polluted sub-basin as per EWQI as well as Health Risk Assessment (HRA). Uncertainties in HRA was quantified using Monte Carlo simulation wherein body weight (33.4%), ingestion rate (24.4%) and concentration of Arsenic (24.3%) were found to be the most significant health controlling variables in the sensitivity study. This study uniquely depicts sub-basin wise characterization of groundwater in the lower Ganga in WB and explores the effect of groundwater pollution on human health.</div></div>","PeriodicalId":11716,"journal":{"name":"Environmental Nanotechnology, Monitoring and Management","volume":"22 ","pages":"Article 101022"},"PeriodicalIF":0.0,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142703809","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Recent advances in the development of effective TiO2-based photocatalysts immobilized on floating substrates: A mini review","authors":"Jia-Zheng Yeoh ,&nbsp;Swee-Yong Pung ,&nbsp;Vel Murugan Vadivelu ,&nbsp;Sivakumar Ramakrishnan","doi":"10.1016/j.enmm.2024.101021","DOIUrl":"10.1016/j.enmm.2024.101021","url":null,"abstract":"<div><div>Among semiconductor-based photocatalysts, titanium dioxide (TiO₂) is one of the promising materials due to its excellent photocatalytic activity, natural abundance, non-toxicity, cost-effectiveness, biocompatibility, and high stability across a wide range of pH levels. However, current TiO₂-based photocatalysts are primarily available in powder form, which presents bottlenecks such as agglomeration of particles leading to inefficient photodegradation and issues in filtration and separation after wastewater treatment that can potentially cause secondary pollution. To address these challenges, the development of immobilizing TiO₂ on floating substrates offers a viable solution. This review article assesses the advantages of immobilizing TiO₂-based photocatalysts on floating substrates, such as bentonite, polyurethane, hydrogels, and cork, to improve photocatalytic efficiency and reusability compared to conventional TiO₂ powder. The utilization of different lightweight materials and various immobilizing techniques used for immobilizing TiO₂ particles have been discussed, highlighting their impact on addressing the limitations of powder based TiO₂ photocatalysts and enhancing photocatalytic performance. However, limitations associated with different substrate materials and immobilization techniques, such as substrate degradation, the need for additional chemicals, and photocatalyst leaching due to improper immobilization techniques, are also discussed in this review article. Furthermore, this review article also outlines future directions for developing effective TiO₂-based photocatalysts for wastewater treatment applications.</div></div>","PeriodicalId":11716,"journal":{"name":"Environmental Nanotechnology, Monitoring and Management","volume":"22 ","pages":"Article 101021"},"PeriodicalIF":0.0,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142703920","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A comprehensive overview of polymeric nanocomposites for environmental pollution mitigation: Assessing health risks and applications","authors":"Alan Shaji,&nbsp;V.C. Deivayanai,&nbsp;A. Saravanan,&nbsp;P.R. Yaashikaa","doi":"10.1016/j.enmm.2024.101020","DOIUrl":"10.1016/j.enmm.2024.101020","url":null,"abstract":"<div><div>Advances in refined wastewater treatment are critical for removing dangerous chemicals and supporting environmentally friendly activities. Polymer nanocomposites (PNCs) have emerged as potential materials for this use, particularly in prosthetics. This analysis emphasizes on the development and promise of PNCs, particularly polymer membrane technology, for wastewater treatment. It categorizes PNCs according to matrix phase, shape, size, and temperature responsiveness, as well as discusses various synthesis methods. The novelty of the review focuses on the application of PNCs as (i) adsorptive materials for pollutant removal, (ii) photocatalysts that employ visible light to treat water, and (iii) filtering units for effective contaminant separation. The current state of nanocomposites for environmental applications is examined, as well as future thoughts on their role in sustainable pollution reduction. This analysis intends to provide insights into PNCs’ potential to alleviate present wastewater treatment difficulties while also improving environmental sustainability.</div></div>","PeriodicalId":11716,"journal":{"name":"Environmental Nanotechnology, Monitoring and Management","volume":"22 ","pages":"Article 101020"},"PeriodicalIF":0.0,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654776","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced cationic/anionic dyes removal in wastewater by green nanocomposites synthesized from acid-modified biomass and CuFe2O4 nanoparticles: Mechanism, Taguchi optimization and toxicity evaluation","authors":"Abdelkader Dabagh,&nbsp;Abdallah Assouani,&nbsp;Fatima Zahra Erraji,&nbsp;Mahmoudy Guellaa,&nbsp;Abdeljalil Ait Ichou,&nbsp;Mohamed EL-Habacha,&nbsp;Fouad Sinan,&nbsp;Mohamed Zerbet","doi":"10.1016/j.enmm.2024.101019","DOIUrl":"10.1016/j.enmm.2024.101019","url":null,"abstract":"<div><div>This article addresses the nanoadsorption mechanisms of rhodamine B (RB), crystal violet (CV), and Congo red (CR) using acid-treated <em>C.edulis</em> (ATCE)/CuFe₂O₄ (ATCE@CuFe₂O₄) from an aqueous solution. The physical and chemical characterizations of nanobiomass were studied using different techniques. The specific surface areas of the ATCE and ATCE@CuFe₂O₄ composites were 15.88 and 337.81 m²/g, respectively, indicating a significant specific surface area of ​​the ATCE@CuFe₂O₄ nanocomposite. A number of functional groups were determined, which promote the binding of the dye to the adsorbent. The SEM also shows that the adsorbent has a homogeneous texture with deep voids and significant porosity, which likely explains the retention and binding of dye ions on the surface of the adsorbent. In fact, the Langmuir isotherm with a correlation coefficient of 99 % for CV, RB and CR, respectively, represents the most suitable model to explain the adsorption mechanism. The maximum adsorption amount is 666.6 mg/g for CV, 645.16 mg/g for RB and 434.71 mg/g for CR at 308 °K. The adsorption kinetic processes were predicted by the pseudo-second order kinetic model. The thermodynamic properties showed that the adsorption on ATCE@CuFe₂O₄ was possible and spontaneous. The ATCE@CuFe₂O₄ recycling and elimination CV, RB, and CR were 74.23 %, 72.75 %, and 67.84 %, respectively, after seven cycles. The design, modeling and optimization of the adsorption parameters were carried out using the Taguchi experimental design. The maximum removal efficiency of CV, RB and CR dyes in optimal operating conditions were 99.96, 98.29 and 97.76 %, respectively. Which at the optimal conditions of 1 g/L, 90 min, 20 mg/L, 298 ^°K, pH 10 for CV and RB dyes and 1 g/L, 90 min, 20 mg/L, 308 ^°K, pH 4 for CR. This research demonstrated the performance of ATCE@CuFe₂O₄ in bean seed germination test and its effectiveness in removing dyes from wastewater.</div></div>","PeriodicalId":11716,"journal":{"name":"Environmental Nanotechnology, Monitoring and Management","volume":"22 ","pages":"Article 101019"},"PeriodicalIF":0.0,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142578531","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Adsorption of tetracycline from an aqueous solution on a CaMgAl-layer double hydroxide/red mud composite: Kinetic, isotherm, and thermodynamic studies","authors":"Zahraa Ali Hammood ,&nbsp;Ahmed A. Mohammed","doi":"10.1016/j.enmm.2024.101018","DOIUrl":"10.1016/j.enmm.2024.101018","url":null,"abstract":"<div><div>This study focused on CaMgAl layered double hydroxide (LDH) based nanocomposite synthesized by a co-precipitation method combined with red mud (RM). The prepared red mud-supported CaMgAl-LDH was characterized by powder X-ray diffraction patterns (XRD), Fourier transform infrared spectra (FTIR), Field-emission scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), and Brunauer-Emmett-Teller analysis (BET), then subsequently used to remove tetracycline (TEC) from an aqueous solution. The TEC maximum adsorption capacity of nanocomposite was 108.753 mg/g. The maximum removal efficiency of 96.91 % was reached under the optimum conditions: pH 6, agitation speed 150 rpm, dosage 0.4 g/100 ml, and initial concentration 70 mg/l with a contact time of 90 min. The experimental adsorption data were fitted well by the Langmuir isotherm model and pseudo second-order model well describe the kinetics of TEC adsorption onto CaMgAl-LDH/RM sites. The adsorption mechanisms were controlled by external mass transfer as well as intra-particle diffusion. The thermodynamic parameters (ΔG°, ΔS°, and ΔH°) indicated that the adsorption of TEC onto red mud-CaMgAl was spontaneous and exothermic in nature. Only a 27 % reduction in the prepared adsorbent′s removal efficiency was noted after six sequential regeneration cycles. This work demonstrates that red mud-supported CaMgAl-LDH offers a potentially efficient adsorbent for the removal of antibiotics from aqueous solution.</div></div>","PeriodicalId":11716,"journal":{"name":"Environmental Nanotechnology, Monitoring and Management","volume":"22 ","pages":"Article 101018"},"PeriodicalIF":0.0,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142578532","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Competent CuS QDs@Fe MIL101 heterojunction for Sunlight-driven degradation of pharmaceutical contaminants from wastewater","authors":"M. Ahmed Mubarak ,&nbsp;Reem Mohamed ,&nbsp;Sameh Ahmed Rizk ,&nbsp;Atef Samir Darwish ,&nbsp;Osama Abuzalat ,&nbsp;Mohamed Eid M. Ali","doi":"10.1016/j.enmm.2024.101013","DOIUrl":"10.1016/j.enmm.2024.101013","url":null,"abstract":"<div><div>In this study, we introduce an advanced photocatalyst developed by integrating copper sulfide quantum dots (CuS QDs) with an iron-based metal–organic framework (MOF), specifically Fe MIL101. The resulting CuS QDs@Fe MIL101 photocatalyst is engineered to efficiently degrade meloxicam (MLX) under simulated sunlight. The heterojunctions were generated by incorporating different concentrations of CuS QDs (5 %, 10 %, 15 %, 20 %, and 50 %) into the Fe MIL101 MOF matrix using the microwave-assisted hydrothermal method. The results of the XRD and the TEM studies confirmed the formation of the heterojunctions, which maintain the structural integrity of both CuS QDs and Fe MIL101. The BET measurements indicated a decrease in surface area upon CuS QDs incorporation, attributed to porés blockage and structural modifications. UV–Vis diffuse reflectance spectroscopy (DRS) revealed a redshift in absorption edges as CuS QDs content increased, enhancing visible light absorption. Photoluminescence (PL) investigations revealed that the 15 % CuS QDs@Fe MIL101 heterojunction had an effective charge separation and low recombination rates. The zeta potential analysis revealed a negative surface charge, indicating an overall electronegative characteristic. The photocatalytic performance, assessed through the degradation of MLX, demonstrated that the 15 % CuS QDs@Fe MIL101 heterojunction achieved the maximum degradation efficiency, reaching 96 % after 45 min of irradiation at a dosage of 0.1 g/L. This exceptional performance is attributed to potent charge separation, improving visible light absorption, high surface area and adsorption capacity. Various scavengers were used to investigate the roles of different reactive species, revealing holes as the predominant active species in the photocatalytic degradation process. These results highlight the potential of 15 % CuS QDs@Fe MIL101 heterojunctions as efficient photocatalyst for environmental remediation from pharmaceutical pollutants under simulated sunlight. These findings highlight the potential for application of CuS QDs@Fe MIL101 in real-world wastewater treatment systems, particularly in addressing pharmaceutical contaminants like meloxicam in industrial effluents.</div></div>","PeriodicalId":11716,"journal":{"name":"Environmental Nanotechnology, Monitoring and Management","volume":"22 ","pages":"Article 101013"},"PeriodicalIF":0.0,"publicationDate":"2024-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142571255","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis, characterization, and ameliorative effect of iron oxide nanoparticles on saline-stressed Zea mays","authors":"Callistus I. Iheme ,&nbsp;Peace M. John ,&nbsp;Gift I. Charleswalter ,&nbsp;Evangelina O. Ohaeri ,&nbsp;Chioma Y. Ezirim ,&nbsp;Winifred N. Nsofor ,&nbsp;Elias E. Emeka ,&nbsp;Chidi U. Igwe ,&nbsp;Chinwe S. Alisi","doi":"10.1016/j.enmm.2024.101016","DOIUrl":"10.1016/j.enmm.2024.101016","url":null,"abstract":"<div><div>High soil salinity induces osmotic and ionic stress that threaten crop production worldwide and affect food security. This study evaluated the ameliorative effects of iron oxide nanoparticles on salinized <em>Zea mays</em>. Iron oxide nanoparticles were synthesized using an aqueous leaf extract of <em>Diodella sarmentosa</em>, and the results of the characterization using Fourier transform infrared (FTIR) spectroscopy, x-ray diffraction (XRD), energy-dispersive x-ray spectroscopy (EDX), transmission electron microscope (TEM), UV–visible spectrophotometer, and scanning electron microscope (SEM) revealed the presence of polydisperse spherical iron oxide nanoparticles (FeONPs) with a light absorption peak at 290 nm, and a size ranging from 3.03 nm to 87.04 nm. Daily foliar application of FeONPs on the salinized <em>Zea mays</em> for 10 days, significantly (p &lt; 0.05) improved the plant’s photosynthetic pigments (total chlorophyl (175.71 %), chlorophyll <em>a</em> (256.34 %), chlorophyll <em>b</em> (77.01 %), carotenoid (39.36 %), root length (9.87 %), and antioxidant enzyme activities, compared to the untreated and bulk FeCl₃·6H₂O-treated controls. Since iron is known to promote photosynthetic pigment synthesis, the enhanced photosynthetic indices observed in the FeONPs-treated pot compared to the bulk FeCl₃·6H₂O-treated pot, may have resulted from the size-aided absorption of the FeONPs more than FeCl₃·6H₂O From the findings, it can be deduced that FeONPs can improve the growth and development of saline-stressed <em>Zea mays</em> by enhancing the activities of the antioxidant enzymes, while improving the photosynthetic pigments of the plant.</div></div>","PeriodicalId":11716,"journal":{"name":"Environmental Nanotechnology, Monitoring and Management","volume":"22 ","pages":"Article 101016"},"PeriodicalIF":0.0,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142529716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fabrication of CNC-AC bionanosorbents from the residual mass of Magnolia champaca l. Bark after methanol extraction for wastewater treatment: Continuous column adsorption study","authors":"Md. Mahmudur Rahman ,&nbsp;Md. Ismail Hossain ,&nbsp;Bijoy Chandra Ghos ,&nbsp;Md. Abdul Gafur ,&nbsp;Md.Ashraful Alam ,&nbsp;Md. Jasim Uddin ,&nbsp;Mst. Sarmina Yeasmin ,&nbsp;Mehedi Hasan ,&nbsp;Tahmina Akter Chowdhury ,&nbsp;G.M. Masud Rana ,&nbsp;Adity Karmakar ,&nbsp;Jaytirmoy Barmon","doi":"10.1016/j.enmm.2024.101015","DOIUrl":"10.1016/j.enmm.2024.101015","url":null,"abstract":"<div><div>In this current study, a new class of multifunctional biobased ecofriendly nanosorbents namely crystalline nanocellulose-activated char (CNC-AC) nanosorbents were fabricated by employing a much more innovative and beneficial solvent evaporation induced phase separation (EIPS) technique. While the crystalline nanocellulose (CNC) were extracted from a very much new, innovative, and beneficial agrowaste source namely banana tree (<em>M. oranta</em>) rachis fibers by conducting a series of chemical treatments like scouring, alkali treatment, bleaching, and acid hydrolysis reactions. Additionally, the biochar were synthesized from the residual mass of <em>Magnolia champaca</em> L. barks after methanol extraction and functionalized by 30 % H₃PO₄ to improve their overall properties. Besides these the fixed-bed continuous column adsorption study were carried out by optimizing the various influential factors such as preliminary concentration and flow rates of the inlet wastewater solution, along with the nanosorbent bed heights into the applied column. For better understanding the overall physicochemical, thermomechanical, and morphostructural behavior of the newly fabricated polyfunctional CNC-AC bionanosorbents the samples were characterized by conducting FTIR-ATR, FESEM, BET, XRD, TGA analysis. Meanwhile the treated and nontreated water specimens were examined by conducting AAS and UV–vis-NIR techniques. The obtained results recommended that the newly produced CNC-AC nanosorbents have contained a quite number of active edges/binding sites along with substantial sp. surface area (around 316.95 m²/g). Additionally, they possessed a crystallinity index about 59.98 ± 0.027 %, greater thermal steadiness up to 600 °C, and outstanding 2D honeycomb-like mesoporous peripheral surface microstructure with a promising spherical shapes and smaller size nearly 5–10 nm. The highest removal capacity were found at <strong>538.91</strong> mg/g and <strong>455.70</strong> mg/g for Pb²⁺ and CR respectively. Additionally, for better understanding the experimental breakthrough curves (BTC) were evaluated by several well established column models while the maximum R² value was found around <strong>0.999</strong> for the Thomas model and reduced chi squire (χ²) value was around <strong>0.0001</strong>.</div></div>","PeriodicalId":11716,"journal":{"name":"Environmental Nanotechnology, Monitoring and Management","volume":"22 ","pages":"Article 101015"},"PeriodicalIF":0.0,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142529715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}