Hamna Bashir, Nabeel Khan Niazi, Zulfiqar Ahmad Saqib, Khalid Hussain
{"title":"Chromium removal by biochar/nanoparticulate iron oxide mineral composites: mechanistic insights and performance under batch and column systems.","authors":"Hamna Bashir, Nabeel Khan Niazi, Zulfiqar Ahmad Saqib, Khalid Hussain","doi":"10.1080/15226514.2025.2522303","DOIUrl":"https://doi.org/10.1080/15226514.2025.2522303","url":null,"abstract":"<p><p>The overarching aim of the current study was to synthesize nanoparticulate iron oxides (NP-FeOx; nano-magnetite (n-Mg), nano-goethite (n-Gh), nano-ferrihydrite (n-Fh), nano-hematite (n-Ht)) and develop rice husk biochar/NP-FeOx-based composites (BC/NP-FeOx) to remove hexavalent chromium (Cr(VI)) from contaminated water. Batch sorption experiments revealed that Cr removal efficiency was in the order: n-Gh (97.5%) > n-Mg (95.8%) > n-Fh (94.1%) > n-Ht (79.5%) at pH 7.0, sorbent dose of 0.5 g L<sup>-1</sup> and C<sub>o</sub> = 12 mg L<sup>-1</sup>. Desorption studies showed the reusability of n-Gh and n-Mg over three cycles (65%-70%). Hence, both the most promising NP-FeOx were integrated with rice husk biochar to fabricate novel BC/n-Gh and BC/n-Mg composites and examined in column experiments for Cr(VI) removal at low and high Cr concentrations (3 and 10 mg L<sup>-1</sup>). High Cr(VI) removal efficiencies (up to 97%-99%) were obtained by both BC/NP-FeX composites across different time intervals (0-72 h). FTIR spectroscopy showed that Cr(VI) sorption was mainly governed by -OH anion exchange and interactions with -C-H, -C = O, and -Fe-O functional groups. This study highlights the significance of BC/n-Gh and BC/n-Mg composites in removing Cr(VI) from contaminated water, providing a suitable and sustainable solution for Cr treatment in wastewater.</p>","PeriodicalId":14235,"journal":{"name":"International Journal of Phytoremediation","volume":" ","pages":"1-11"},"PeriodicalIF":3.4,"publicationDate":"2025-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144527912","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":"The analysis of changes in antioxidant enzyme activity and gene expression caused by lead contamination in <i>Azolla caroliniana</i>.","authors":"Mozhgan Mehtari, Majid Talebi, Badraldin Ebrahim Sayed Tabatabaei","doi":"10.1080/15226514.2025.2521402","DOIUrl":"https://doi.org/10.1080/15226514.2025.2521402","url":null,"abstract":"<p><p>Heavy metal contamination in aquatic ecosystems poses serious environmental and health risks. <i>Azolla caroliniana</i>, a promising candidate for phytoremediation, has the potential to absorb heavy metals like lead <b>(</b>Pb<b>).</b> However, limited information is available on the enzymatic and genetic responses of <i>A. caroliniana</i> under Pb stress. This study investigates the plant's phytoremediation capacity by analyzing antioxidant enzyme activity and gene expression under lead (II) acetate [Pb(C<sub>2</sub>H<sub>3</sub>O<sub>2</sub>)<sub>2</sub>] concentrations (0, 500, 750, 1,000 µM) over three time points (days 2, 4, and 6). The results showed that with increasing Pb concentration, antioxidant enzyme activity increased. Chlorophyll content increased by 25% at 1,000 µM Pb, whereas carotenoid and anthocyanin levels decreased by 233% and 30%, respectively. Total protein content declined by 90%. Additionally, SOD and CAT activities increased by 28%, while APX activity rose by 25%. Gene expression analysis revealed that genes associated with antioxidant enzymes <i>CAT</i> (94% decrease), <i>APX</i> (64% decrease), <i>SOD</i> (40% decrease), <i>GR</i> (8% increase), and <i>PPO</i> (93% decrease) as well as anthocyanin biosynthesis genes <i>C4H</i> (56% decrease) and <i>CHS</i> (87% decrease) were significantly downregulated at the highest Pb concentration in the later stages, indicating a critical adaptation phase. Observed gene expression fluctuations in the later stages may result from <i>A. caroliniana's</i> dynamic stress response, where initial upregulation of antioxidant defense genes suggests an attempt to mitigate oxidative stress, followed by metabolic adjustments leading to variations in gene expression levels. Lead uptake peaked on day 2 but significantly declined by 42% on day 6, likely due to cellular saturation, activation of detoxification mechanisms, or lead translocation into the growth medium. These findings highlight the potential of <i>A. caroliniana</i> as an effective phytoremediator for Pb-contaminated water bodies.</p>","PeriodicalId":14235,"journal":{"name":"International Journal of Phytoremediation","volume":" ","pages":"1-14"},"PeriodicalIF":3.4,"publicationDate":"2025-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144527914","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}
Luis Alberto Galindo Acuña, Mireya Patricia Córdoba Sánchez
{"title":"Bioindication and phytostabilization of potentially toxic elements by <i>Schoenoplectus californicus</i> in a Ramsar urban wetland, Colombia.","authors":"Luis Alberto Galindo Acuña, Mireya Patricia Córdoba Sánchez","doi":"10.1080/15226514.2025.2521400","DOIUrl":"https://doi.org/10.1080/15226514.2025.2521400","url":null,"abstract":"<p><p>This study evaluates <i>Schoenoplectus californicus</i> as a bioindicator for As, Cd, Cr, Ni, Pb, and Hg in the Capellanía wetland. Triplicate samples were collected from sediment, roots, and stems at three wetland sites. Statistical analyses were conducted to evaluate differences in sediment concentrations across sites using ANOVA with normality assessed using the Shapiro-Wilk test. Pearson correlation analyses assessed linear relationships between sediment and root concentrations. Bioconcentration (BCF) and translocation (TF) factors were calculated to determine PTEs mobility in the plant. <i>S. californicus</i> accumulates PTEs primarily in roots with significant concentrations of Cr, Ni, and Pb in this tissue. BCF values exceeding 1.00 at Site 3. However, the translocation factors for Cr, Ni, and Pb were below 1.00. No presence of As, Cd, and Hg was detected in plant tissues. <i>S. californicus</i> functions as an effective phytostabilizer of Cr, Ni, and Pb in contaminated wetland ecosystems by restricting element translocation to aerial tissues.</p>","PeriodicalId":14235,"journal":{"name":"International Journal of Phytoremediation","volume":" ","pages":"1-9"},"PeriodicalIF":3.4,"publicationDate":"2025-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144496637","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":"Cobalt tolerant bacteria mobilize iron in garden pea (<i>Pisum sativum</i> L.) to mitigate cobalt stress in iron deficit soils.","authors":"Sapna Chandwani, Vaibhavi Ahire, Salim Manoharadas, Natarajan Amaresan","doi":"10.1080/15226514.2025.2522304","DOIUrl":"https://doi.org/10.1080/15226514.2025.2522304","url":null,"abstract":"<p><p>Excess cobalt (Co) in plants induces oxidative stress and competes with iron (Fe), leading to Fe deficiency, leaf loss, and reduced chlorophyll content. Although Co is essential for some lower and leguminous plants, its toxicity hampers growth. In this study, seven previously isolated siderophore and 1-aminocyclopropane-1-carboxylate deaminase (ACCD) bacteria possessing PGP properties such as indole-3-acetic acid like substances production, and phosphate solubilization were screened for Co-tolerance. Pot study (2000 ppm Co stress) revealed enhanced root (108.10%-297.89%) and shoot length (28.99%-118.01%), and increased uptake of nitrogen (35.36-41.36 mg g<sup>-1</sup>), phosphorous (3.54-4.21 mg g<sup>-1</sup>), Co (3.09-5.2 µg g<sup>-1</sup>) and Fe (34.08-41.02 µg g<sup>-1</sup>), and chlorophyll (13.19-42.97 mg g<sup>-1</sup>). Furthermore, inoculation of bacteria also significantly enhanced the soil siderophore units (96.21%-262.01%), ACCD production (1.74-4.99 µmol mL<sup>-1</sup>) and the soil respiration activity such as fluorescein diacetate hydrolysis (11.33-48.57 µg g<sup>-1</sup>), dehydrogenase enzyme (99.26-197.32 µg g<sup>-1</sup>) and alkaline phosphatase (418.20-918.20 µg g<sup>-1</sup>). In conclusion, strains IMN 4 (<i>Delftia</i> sp.) and SBTS 12 (<i>Rhodococcus</i> sp.) can be used to alleviate Co-stress <i>via</i> mobilizing Co and Fe in plants grown in Fe limited soils.</p>","PeriodicalId":14235,"journal":{"name":"International Journal of Phytoremediation","volume":" ","pages":"1-13"},"PeriodicalIF":3.4,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144484333","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":"<i>Lantana camara</i> L.: a potential biocontrol agent against phytoplasma infection in chili plants.","authors":"Smriti Mall, Apoorva Srivastava, Gargee Singh","doi":"10.1080/15226514.2025.2522306","DOIUrl":"https://doi.org/10.1080/15226514.2025.2522306","url":null,"abstract":"<p><p>Phytoplasma, a phytopathogenic mollicute, poses a major threat to global agriculture with no effective control strategies currently available. <i>Lantana camara</i> L., an invasive weed, contains bioactive compounds with promising antimicrobial potential. This study investigates its potential, by utilizing the bioactive potential of green unripe berry extract from <i>Lantana camara</i> L., to mitigate phytoplasma infections in chili plants (<i>Capsicum annuum</i>). Phytoplasma infection in symptomatic chili plants was confirmed by nested PCR. Treatment with optimized <i>L. camara</i> extract led to significant recovery from little leaf disease. GC-MS analysis of <i>Lantana camara</i> L. green unripe berries identified six bioactive compounds with potential phytoplasma-inhibitory and antibacterial properties. To further explore their therapeutic potential, molecular docking studies were performed against the target protein SAP05 effector complexed with AtRpn10 (PDB ID: 8JTL) which is a known effector protein associated with phytoplasma pathogenicity. Among the docked compounds, Carsalam showed the strongest binding affinity (-7.2 kcal/mol) by interacting with Lys56 (C) residue. Other compounds like 5-(4-Chlorobenzyl)-1H-tetrazole and Cyclohexylmethylphosphonic acid also exhibited strong binding and targeted critical residues involved in protein function. These findings suggest <i>L. camara</i> has the potential to inhibit phytoplasma, marking a preliminary step toward sustainable phytoplasma management and an alternative to chemical treatments.</p>","PeriodicalId":14235,"journal":{"name":"International Journal of Phytoremediation","volume":" ","pages":"1-12"},"PeriodicalIF":3.4,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144484332","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}
Jaqueline Dos Santos Soares, Mateus Pimentel de Matos, Antonio Teixeira de Matos, Mateus Henrique Barbosa, Stephani Moreira Alves, Fátima Resende Luiz Fia, Rodolfo Appoloni Crippa
{"title":"Comparative evaluation of hydraulic retention time effect in Bio-rack wetlands system operation in tropical climate.","authors":"Jaqueline Dos Santos Soares, Mateus Pimentel de Matos, Antonio Teixeira de Matos, Mateus Henrique Barbosa, Stephani Moreira Alves, Fátima Resende Luiz Fia, Rodolfo Appoloni Crippa","doi":"10.1080/15226514.2025.2511147","DOIUrl":"https://doi.org/10.1080/15226514.2025.2511147","url":null,"abstract":"<p><p>The aim of this study was to evaluate the effect of different hydraulic retention time (HRT) in Bio-rack Wetland Systems (BRWSs) planted with vetiver grass in tropical climate. For this purpose, four BRWSs were built on an experimental scale with HRTs of 6, 12, 24 and 48 h, denoted BRWSs A, B, C, and D, respectively. The removal efficiencies for BRWSs A, B, C, and D reached 27, 50, 58 and 67% for biochemical oxygen demand (BOD); 20, 29, 65, and 74% of chemical oxygen demand (COD); 1.1, 11, 15 and 32% of total Kjeldahl nitrogen (TKN); 1.4, 12, 18 and 29% of total phosphorus (TP); and 0.01, 0.1, 0.3, and 0.8 log units of thermotolerant coliforms (C<sub>Ther</sub>), respectively. Based on results, BRWS D showed statistically greater performance than BRWS A for BOD, COD, TP, and CTher and efficiencies were similar to those typical found in septic tanks (with BRWS D being more effective), being able to be used for decentralized wastewater treatment. The high variability in sewage characteristics may have resulted in limitations in detecting statistical differences between treatments. From regression analysis, there is a suggestion that the HRT of 38 h would provide the best results.</p>","PeriodicalId":14235,"journal":{"name":"International Journal of Phytoremediation","volume":" ","pages":"1-10"},"PeriodicalIF":3.4,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144475149","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":"Pig manure-derived DOM enhances soil Cd adsorption to reduce Cd accumulation in rice organs.","authors":"Xudi Huang, Wenjian Liu, Juanli Yun, Ting Wei, Chao Zhang, Minwang Laipan, Lei Zhang, Shan Li, Jing Yang, Jiangbo Hai, Junkang Guo, Yinping Bai","doi":"10.1080/15226514.2025.2522301","DOIUrl":"https://doi.org/10.1080/15226514.2025.2522301","url":null,"abstract":"<p><p>ABSTRACTSDissolved organic matter (DOM) has different functions that affect the absorption and resolution behavior of soil Cd. We investigated two exogenous DOM (pig manure and rice straw) in soils, analyzed their structural features, and explored their effect on Cd behavior in soil. Our results showed that the two exogenous DOM contain similar functional groups, including carboxylic acids, alcohols, alkanes, phenols, and polysaccharides. The molecular weight of DOM in F2 to F4 (3 kD-30 kD) have the effect of activating and migration of Cd. Pot and field experiments demonstrate that DOM from pig manure is more effective in enhancing soil Cd adsorption and reduces the exchangeable Cd in soil during the seedling stage of rice. Under the treatment of pig manure and straw, the Cd in the roots, stems and leaves of rice decreased by 14%, 11%, 10%, and 8%, 14%, 10%, respectively. It indicates that pig manure application reduces Cd accumulation in rice roots, and straw application reduces it in rice stems. Overall, after applying pig manure and rice straw, Cd concentration in rice grains decreased by 36% and 17%, respectively. This study is conducive to a further understanding the behavior and morphological changes of Cd in paddy soil.</p>","PeriodicalId":14235,"journal":{"name":"International Journal of Phytoremediation","volume":" ","pages":"1-9"},"PeriodicalIF":3.4,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144475151","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":"Phytoremediation potential of pot marigold (<i>Calendula officinalis</i> L.) under plant growth-promoting rhizobacteria (PGPR) treatments for sustainable urban green infrastructure development.","authors":"Fatemeh Kazemi, Mansoure Jozay","doi":"10.1080/15226514.2025.2520357","DOIUrl":"https://doi.org/10.1080/15226514.2025.2520357","url":null,"abstract":"<p><p>This study evaluated the phytoremediation potential of pot marigolds on green wall systems for removing soil cadmium. The experiment was a factorial arrangement in a randomized complete block design. The first factor was cadmium (0, 1, 2, and 3 mg/kg soil), and the second was seven single or mixed plant growth-promoting rhizobacteria (PGPR) and the control treatments. All root and flower-related traits significantly increased after bacterial treatments (<i>p</i> ≤ 0.05). Substrates inoculated with <i>Thiobacillus thioparus</i> strain 300, Mix2 (<i>Aztobactor chorococcum</i> strain D0941 + <i>Azosporillum liposferum</i> strain So131), and Mix3 (<i>Thiobacillus thioparus</i> strain 300+ <i>Pseudomonas putida</i> strain G0951+ <i>Aztobactor chorococcum</i> strain D0941+ <i>Azosporillum liposferum</i> strain So131) increased phytoremediation of pot marigold in roots and shoots up to 3 mg/kg soil cadmium. The transfer factor (TF) was under one in flowers, showing the low potential of the flowers for phytoremediation. TF was above one in aerial vegetative plant sections, indicating the species as a cadmium accumulator and extractor for managing cadmium contaminant sites. Based on purification ratios and transfer factors, <i>Thiobacillus thiolates</i> (alone or combined) is recommended for enhancing pot marigold esthetics in landscapes, while Pseudomonas strains (single or mixed) improve its phytoremediation potential in urban green infrastructure.</p>","PeriodicalId":14235,"journal":{"name":"International Journal of Phytoremediation","volume":" ","pages":"1-11"},"PeriodicalIF":3.4,"publicationDate":"2025-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144475150","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}
Amina Farrukh Alavi, Sara Malik, Safia Ahmed, Bilal Ahmed, Muhammad Salman, Ayesha Farooq, Iffat Naz
{"title":"Mitigation of antibiotic resistance: the efficiency of a hybrid subsurface flow constructed wetland in the removal of resistant bacteria in wastewater.","authors":"Amina Farrukh Alavi, Sara Malik, Safia Ahmed, Bilal Ahmed, Muhammad Salman, Ayesha Farooq, Iffat Naz","doi":"10.1080/15226514.2025.2516250","DOIUrl":"https://doi.org/10.1080/15226514.2025.2516250","url":null,"abstract":"<p><p>This research investigates the effectiveness of a lab-scale hybrid subsurface flow constructed wetland (HSSFCW) for removing wastewater contaminants, including antibiotic-resistant bacteria (ARB), genes (ARGs) and antibiotics. The results suggested that HSSFCW demonstrated a high removal efficiency for COD (89%) and BOD (88.9%), while lower efficiencies were observed for salts, TDS, EC, and TKN. Further, various bacteria such as <i>Enterobacter cloacae, Serratia liquefaciens</i> and <i>Serratia odorifera</i> were detected in the plant rhizosphere, while <i>Acinetobacter baumanii</i> and <i>Staphylococcus spp.</i> were identified as biofilm formers on the wetland media. The mean removal efficiency of 70.44, 65.99, 70.66 and 51.49% was observed for total heterotrophic bacteria; Cefixime (Cef)-, Ciprofloxacin (Cip)-, and Linezolid (Lzd)-resistant bacteria. Upon chlorination of effluent samples, Cef-, Cip- and Lzd-resistant bacteria were effectively inactivated at 30, 15 and 7.5 mg Cl<sub>2</sub> min/L, respectively. The wetland achieved a removal efficiency of 83.85% for Cip and 100% for Lzd at week 12 with <i>p</i> = 0.040 and <i>p</i> < 0.001, respectively. Further, a log reduction of 0.66 for <i>16S</i>, 0.82 for <i>blaTEM</i>, 0.61 for <i>blaCTX,</i> and 0.48 for <i>blaOXA</i> was observed. Thus, HSSFCW was observed to be efficient in removing organic contaminants, ARBs, ARGs and antibiotics from domestic wastewater and can be upgraded under natural environments.</p>","PeriodicalId":14235,"journal":{"name":"International Journal of Phytoremediation","volume":" ","pages":"1-12"},"PeriodicalIF":3.4,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144325678","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}
Michael Tope Agbadaola, Damilola Adeola Akinyemi, Damilola Idowu Famadewa, Oluwamumiyo Dorcas Adeojo, Olaitan Michael-Agbadaola, Jonathan Oyebamiji Babalola
{"title":"NiO-biomass microcomposite for the phytoremediation of methylene blue from wastewater.","authors":"Michael Tope Agbadaola, Damilola Adeola Akinyemi, Damilola Idowu Famadewa, Oluwamumiyo Dorcas Adeojo, Olaitan Michael-Agbadaola, Jonathan Oyebamiji Babalola","doi":"10.1080/15226514.2025.2521408","DOIUrl":"https://doi.org/10.1080/15226514.2025.2521408","url":null,"abstract":"<p><p>Modification of adsorbent with nanomaterials has become a widely adopted method to improve their surface morphology and adsorption capacity. In the present study, <i>Bauhinia tomentosa</i> seedpod (BTSP) was modified with unary NiO nanoparticle to form NiO-BTSP adsorbent for the removal of methylene blue (MB) from water. The functional, optical, and morphological properties of the synthesized adsorbent was characterized by Fourier transform infrared spectroscopy, UV-Vis Spectroscopy, Energy Dispersive X-Ray, and Scanning electron microscopy. Results showed formation of agglomerated particles with pore spaces that were loaded with dye molecules after adsorption. Adsorption studies revealed formation of multiple layers of dye molecules on the adsorbent at an optimum pH of 12 and maximum monolayer capacity of 357.14 mg/g. Kinetics modeling of the adsorption data showed that adsorption occurred through chemical interaction between the adsorbent and dye molecules to reach equilibrium in 60 min. Desorption experiments using different organic and inorganic acids and bases further revealed the reusability potential of the adsorbent with optimal regeneration obtained using as low as 0.01 M acetic acid.</p>","PeriodicalId":14235,"journal":{"name":"International Journal of Phytoremediation","volume":" ","pages":"1-11"},"PeriodicalIF":3.4,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144325680","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}