环境•农林最新文献

{"title":"Application of Magnesium and Copper Functionalized Biochar Composites in Treating Cyanobacteria in Oil-Impacted Eutrophic Water","authors":"Zhuo Wei,&nbsp;Yaheng Yang,&nbsp;Yi Wei,&nbsp;Shuai Niu,&nbsp;Ronghua Li,&nbsp;Baoyue Zhou,&nbsp;Yang Liu,&nbsp;Jim J. Wang","doi":"10.1007/s11270-025-07893-4","DOIUrl":"10.1007/s11270-025-07893-4","url":null,"abstract":"<div><p>Remediation of eutrophic water is a challenging task. Modification of biochar has been demonstrated to enhance the removal ability of contamination of biochar. In this work, magnesium (Mg) and copper (Cu) were incorporated in biochar during preparation to increase the removal of phosphate (P) and inhibit algae bloom. The results showed that Mg-modification significantly (<i>p</i> &lt; 0.05) improved the adsorption of phosphate, and the adsorption capacity was 138.7 mg g⁻¹, and the improvement on P removal was attributed by the formation of MgO which enhanced the sorption affinity on PO₄³⁻. In addition, Cu-modification showed significant (<i>p</i> &lt; 0.05) inhibition effect on growth of cyanobacteria as compared to original biochar with biomass decrease of 62% for Cu-biochar and 85% for Cu-Mg-biochar after three week incubation. Among all modified biochar composites, Cu-Mg-biochar showed highest inhibition effect due to the removal of nutrient and directly causing cell lysis. Moreover, in the water co-existing with different ratios of oil and PO₄³⁻, Cu-Mg-biochar showed highest (<i>p</i> &lt; 0.05) efficiency in inhibition on the growth of toxic cyanobacteria, biomass decreased from 2.85 mg L⁻¹ to 0.20 mg L⁻¹. Overall, Cu-Mg-biochar composite was suggested effective remediation material in treating oil-impacted eutrophic water.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":808,"journal":{"name":"Water, Air, & Soil Pollution","volume":"236 5","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143778061","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":"Catalytic Oxidation of Imidacloprid Insecticide by Cu(II)/Peroxymonosulfate System","authors":"Yeison Núñez-de la Rosa,&nbsp;Vladimir A. Ballesteros-Ballesteros,&nbsp;Luis Guillermo Cuadrado Durango,&nbsp;Jorge Luis Nisperuza Toledo,&nbsp;Maria Fátima das Graças Fernandes,&nbsp;José M. Aquino","doi":"10.1007/s11270-025-07921-3","DOIUrl":"10.1007/s11270-025-07921-3","url":null,"abstract":"<div><p>Water contamination by synthetic organic compounds is one of the major environmental issues facing the world today. Among the available methods to treat them, catalytic advanced oxidation processes using Cu(II) ions to activate peroxymonosulfate is a potential candidate at slightly alkaline conditions (pH 8). In this work, we investigated the influence of PMS concentration (0–1000 μmol L^–1), solution pH (7–10), and the effect of water matrix (ultrapure, tap, and simulated municipal wastewater—SMWW) on imidacloprid (IMD) insecticide oxidation. After optimization of the investigated variables (500 μmol L^–1 PMS and pH 8), almost complete IMD oxidation was achieved in 6 h using ultrapure and tap water. The main detected byproducts resulting from IMD oxidation in ultrapure water are due to hydroxylation reactions and rupture of the imidazolidine ring. When SMWW was used, IMD oxidation was only 10% in 6 h, probably due to the scavenging effect of inorganic and organic compounds. The main produced working oxidants were radical (mainly HO^● and SO₄^●–) and non-radical (¹O₂, Cu(I), and Cu(III)) species, based on scavenging experiments and mass spectrometry detection of produced DMPO byproducts. Among these, HO^● species seems to promptly oxidize IMD.</p></div>","PeriodicalId":808,"journal":{"name":"Water, Air, & Soil Pollution","volume":"236 5","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143778063","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":"Au-TiO2 Catalysts for Enhanced Visible Light Photocatalysis for Sustainable Treatment of Textile Effluents","authors":"Raiane dos Santos,&nbsp;Evelle Duarte C. Oliveira,&nbsp;Ivana C. F. Araujo,&nbsp;Jhonanta N. Silva,&nbsp;Alan G. Câmara,&nbsp;Emerson F. M. da Silva,&nbsp;Ramón R. P. Garcia,&nbsp;Daniella C. Napoleão,&nbsp;Luciano C. Almeida","doi":"10.1007/s11270-025-07920-4","DOIUrl":"10.1007/s11270-025-07920-4","url":null,"abstract":"<div><p>The present study investigates the need to improve photocatalytic processes for the treatment of textile effluents, which are traditionally reliant on ultraviolet radiation, which is impractical on an industrial scale. Therefore, enhancing efficiency in the visible spectrum is crucial. This study emphasizes the importance of the synthesis methodology in the creation of gold nanoparticles (Au-NPs) to boost their photocatalytic activity via electron transfer and surface plasmon resonance. This study explores the synthesis of modified Au-NPs on TiO₂ using precipitation deposition (PD) and modified wet impregnation (MWI) techniques. Results showed that MWI synthesis yields catalysts with greater surface area and smaller particle sizes than PD, enhancing the photocatalytic efficiency, and achieving 100% dye removal in less than 90 min, and a reduction in total organic carbon (TOC) of more than 70%. Photocatalytic degradation tests under solar and visible light reveal that MWI-derived catalysts outperform PD-derived ones in reducing RB5 dye. The analysis of active species involved in the redox reactions identified h⁺, ^{− •}O₂, e⁻, and ^•OH radicals as contributors to the degradation of the organic pollutant RB5, with photogenerated holes being the primary active species in the photocatalytic process, followed by hydroxyl radicals. Thus, it was possible to confirm the important role of gold nanoparticles in the enhancement of the photocatalytic activity.</p></div>","PeriodicalId":808,"journal":{"name":"Water, Air, & Soil Pollution","volume":"236 5","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143778062","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":"Microplastics in Acetes shrimps from the southeastern coast of Bangladesh","authors":"Faisal Sobhan,&nbsp;Ragib Anjum Rayat,&nbsp;Abu Bokkar Siddique,&nbsp;Md. Azizul Fazal,&nbsp;Showmitra Chowdhury,&nbsp;Subrata Sarker","doi":"10.1007/s11270-025-07946-8","DOIUrl":"10.1007/s11270-025-07946-8","url":null,"abstract":"<div><p>Microplastics (MPs), though often invisible to the naked eye, pose a significant and pervasive environmental threat, subtly integrating into natural systems and disrupting ecological balance. Ingestion of MPs at different trophic levels has been widely documented, but their impacts on zooplankton have been under-studied despite their vital ecological roles in marine food webs. In this study, MPs were determined in popular seafood <i>Acetes</i> shrimps (<i>Acetes chinensis</i> and <i>A. erythraeus</i>) from the southeastern coast of Bangladesh. The entire body of the shrimps (500 individuals of each species) underwent comprehensive MP analysis through aquamation (alkaline hydrolysis), microscopic examination and polymer identification by Attenuated Total Reflectance-Fourier Transformed Infrared Spectroscope (ATR-FTIR). A total of 67 and 110 particles were visually identified, among which 39 and 51 particles were determined as MPs using ATR-FTIR in <i>A. erythraeus</i> and <i>A. chinensis,</i> respectively<i>,</i> averaging 0.078–0.102 particles per species. This study encountered various colours, shapes, and types of MPs, among which white/transparent (49–59%), filamentous (76–82%), and fiber (76–77%) were prevalent. The study observed a size range of MPs from &lt; 500 µm to 5 mm, with a concentration of 1.33–11.15 items/g biomass. ATR-FTIR analysis identified 37, 25, 11, 9, 5, and 3 polymer particles of Polyethylene, Polypropylene, Polyethylene Terephthalate, Nylon-6 (Polyamide), Ethylene Vinyl Acetate and Polybutylene Terephthalate respectively. The findings of this study have elicited a “wake-up call” on the bioaccumulation of MPs in <i>Acetes</i> shrimps with potential contamination of seafood and public health concerns in the Bay of Bengal region.</p></div>","PeriodicalId":808,"journal":{"name":"Water, Air, & Soil Pollution","volume":"236 5","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143778064","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":"Correction to: Sustainable Atrazine Removal from Real Water Matrices Using Solar‑Powered Electrooxidation","authors":"Bishwatma Biswas,&nbsp;Sudha Goel","doi":"10.1007/s11270-025-07890-7","DOIUrl":"10.1007/s11270-025-07890-7","url":null,"abstract":"","PeriodicalId":808,"journal":{"name":"Water, Air, & Soil Pollution","volume":"236 5","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143769795","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":"Mercerized Microcrystalline Cellulose: A Game-Changer for Sustainable Chromium Removal from Tannery Effluents","authors":"Alex Rodrigues Gomes,&nbsp;Letícia Paiva de Matos,&nbsp;Abner Marcelino Silva,&nbsp;Abraão Tiago Batista Guimarães,&nbsp;Thiarlen Marinho da Luz,&nbsp;Rafaela Ribeiro de Brito,&nbsp;Aline Sueli de Lima Rodrigues,&nbsp;Juraci Alves de Oliveira,&nbsp;Mônica Cristina Teixeira,&nbsp;Ivandilson Pessoa Pinto de Menezes,&nbsp;Chinnasamy Ragavendran,&nbsp;Marimuthu Govindarajan,&nbsp;Guilherme Malafaia","doi":"10.1007/s11270-025-07929-9","DOIUrl":"10.1007/s11270-025-07929-9","url":null,"abstract":"<div><p>The leather tanning industry generates significant environmental impacts due to the release of effluents containing high concentrations of heavy metals, particularly chromium (Cr). This study investigates the efficacy of mercerized microcrystalline cellulose particles (MCPs) as a sustainable adsorbent for Cr removal from tannery effluents. MCPs were synthesized and characterized using Raman spectroscopy and scanning electron microscopy (SEM) to assess their structural modifications post-mercerization. Adsorption assays were conducted under various experimental conditions, including agitation rate, pH, temperature, effluent concentration, and MCP concentration. The adsorption capacity was modeled using Langmuir, Freundlich, Dubinin-Radushkevich, and Temkin isotherms, with Langmuir providing a better fit (R² = 0.9884), indicating indicating a monolayer adsorption of Cr ions onto the MCPs surface. Results showed a maximum adsorption capacity of 28.17 mg/g for Cr, with optimal conditions identified as 400 rpm agitation, pH 5.0, 35 °C temperature, and 25 mg/L MCP concentration. Multiple regression analysis highlighted pH and effluent dilution as significant factors affecting adsorption efficiency. Additionally, cluster analysis and Detrended Correspondence Analysis (DCA) confirmed the complex interactions among the variables. Our findings suggest that mercerized MCPs are a promising and sustainable solution for Cr removal from tannery effluents, offering a high adsorption capacity and potential for environmental application. Future research should focus on the regeneration and reuse of MCPs, assessing other pollutants, and the economic feasibility of large-scale implementation.</p></div>","PeriodicalId":808,"journal":{"name":"Water, Air, & Soil Pollution","volume":"236 5","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143769794","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":"Hydrochar-Enriched Myrtus communis Emulsion Gel: Antimicrobial Efficacy Against Bacterial Contaminants on Inoculated Carcass Skin","authors":"Elmas Can,&nbsp;Elif Erdogan Eliuz,&nbsp;Erdal Yabalak","doi":"10.1007/s11270-025-07935-x","DOIUrl":"10.1007/s11270-025-07935-x","url":null,"abstract":"<div><p>This study used chicken nail hydrochar (CH) to make a matrix environment in <i>Mrytus</i> <i>communis</i> (<i>M. communis</i>) emulsion gel (MEg). The inhibition potential of MEg containing CH against <i>Acinetobacter baumannii (A. baumannii)</i> and <i>Enterococcus faecalis (E. faecalis)</i> pathogens and the characterization were investigated. Characteristics and surface analysis of hydrochar-based <i>M. communis</i> emulsion gel (H-MEg) were analysed using FT-IR and SEM. <i>M. communis</i> essential oil (EO) was emulsified using tween 80, gelified using collagen and then immobilized into the hydrochar using a lyophilizer. In the antibacterial activity test, inhibition zones of MEg and H-MEg against <i>A. baumannii</i> were 7.26, and 9.1, respectively. <i>E. faecalis</i> was inhibited with 47.81 and 5.82 mm by MEg, and H-MEg, respectively. The highest reduction at the final of 30 min for <i>A. baumannii</i> inoculated carcass skin was 1.3 CFU/cm², 95.9% for H-MEg (<i>p</i> &lt; 0.05). The zeta potential, conductivity and viscosity of H-MEg were -14.5 ± 0.4 mV, 0.0012, and 0.8872, respectively. As a result, the addition of CH to MEg-containing microdroplets enabled the composite to become fully stable. The hydrochar itself did not have antimicrobial effects, while the bioactive <i>M. communis</i> emulsion gel enhanced the functionality of chicken nail waste-based hydrochar. H-MEg obtained from chicken nail waste can be used for treatment purposes in infections where <i>A. baumannii ve E. faecalis</i> bacteria are active.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":808,"journal":{"name":"Water, Air, & Soil Pollution","volume":"236 5","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11270-025-07935-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143769834","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}

{"title":"Combined impacts of tetracycline and multi-walled carbon nanotubes on the growth of Chrysanthemum coronarium L. and its root environment","authors":"Minling Gao, Hongchang Peng, Zhengzhen Xiao, Ling Xiao, Youming Dong, Iranzi Emile RUSHIMISHA Emile RUSHIMISHA, Wenhao Yu, Zhengguo Song","doi":"10.1039/d4en00790e","DOIUrl":"https://doi.org/10.1039/d4en00790e","url":null,"abstract":"Multi-walled carbon nanotubes (MW) and tetracycline (TC) usually co-occur in the environment and can threaten plant growth. However, little is known about their combined effect on plant growth. We conducted hydroponic experiments to investigate the uptake, transport, and compartmentalization of TC in Chrysanthemum coronarium L. in the presence of MW, and the combined effects of TC and MW on the root environment were also studied. The results revealed that the presence of MW reduced the concentration of TC in the four subcellular fractions, both in the leaves and roots, compared with TC alone. Co-pollution with TC and MW stimulated the production and accumulation of superoxide anions (O2.-), and hydrogen peroxide (H2O2) in the leaves and roots compared to TC alone, leading to an increase in the malondialdehyde content; this inhibited photosynthesis by reducing the activity of ribulose-1,5-bisphosphate carboxylase and dehydrogenase activity, resulting in a decrease in the dry weight of leaves and roots. The increased O2.- and H2O2 contents induced superoxide dismutase and catalase activities to alleviate oxidative damage. In addition, compared with single TC contamination, the co-application of TC and MW significantly increased the concentrations of oxalic acid and formic acid in root secretions, stimulated the activity of microorganisms, and improved autochthonous input and humification of dissolved organic matter in the growth medium. High-throughput sequencing revealed that Proteobacteria were the dominant bacteria in the medium solution across all groups, followed by Bacteroidetes and Firmicutes. Spearman and redundancy analyses demonstrated that an increase in the relative abundance of beneficial bacteria may stimulate the antioxidant system to defend against exogenous pollution. Our study provides valuable information about the combined toxicological effects of TC and MW on the growth of medicinal plants.","PeriodicalId":73,"journal":{"name":"Environmental Science: Nano","volume":"3 1","pages":""},"PeriodicalIF":8.131,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143776111","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Optimizing Water Purification: Adsorbent Performance of Phumdi Biomass Activated Carbon for Fe(II) Removal Using Artificial Neural Network","authors":"Lairenlakpam Helena,&nbsp;Sudhakar Ningthoujam,&nbsp;Potsangbam Albino Kumar","doi":"10.1007/s11270-025-07934-y","DOIUrl":"10.1007/s11270-025-07934-y","url":null,"abstract":"<div><p>This study evaluates the performance of artificial neural networks (ANNs) in predicting Fe (II) adsorption using activated carbon derived from Phumdi biomass (PAC) in batch and continuous fixed-bed setups. Phumdi, a unique biomass from the Loktak Lake ecosystem, serves as a sustainable and cost-effective precursor for activated carbon production due to its rich organic composition and functional groups. Large accumulations of Phumdi are commonly found along the periphery of Loktak Lake, where they are often regarded as waste. To account for variations in biomass properties, samples were collected from three different sites: a national park, an agricultural area, and a residential area. BET surface area analysis confirmed the porous nature of the activated carbons, with values ranging from 2.722 to 5.940 m²/g across different biomass sources. FTIR characterization identified key functional groups, including hydroxyl, alkyl, and carbon–carbon bonds, which play a crucial role in Fe (II) adsorption. Amongst the batch analysis parameters, the agitation speed was found to be optimum at 250 rpm, and the temperature at 298 K, with an equilibrium time of 120 min. Kinetic studies followed a pseudo-second-order model, indicating chemisorption, while isotherm analysis confirmed Langmuir model conformity, with a maximum adsorption capacity ranging from 1.12 to 6.50 mg/g. Thermodynamic studies confirmed that the adsorption process is exothermic and spontaneous, driven by energy release and a decrease in free energy. Fixed-bed experiments using activated carbon from phumdi biomass from an agricultural area were conducted at varying flow rates (2 mL/min and 4 mL/min), bed depths (20 cm, 40 cm, and 60 cm), and influent concentrations. The maximum throughput of 12 L was achieved before significant breakthrough at 5 mg/L, 4 mL/min, and 60 cm, indicating optimal adsorption performance under these conditions. ANNs demonstrated high predictive accuracy, with R² values of 1.00 for training, 0.99 for testing, and 0.95 for validation in the batch system, and 0.99 for training, 0.98 for testing, and 0.95 for validation in the fixed-bed system. The optimal ANN architectures were 6–6-1 for batch adsorption and 4–12-1 for fixed-bed adsorption, with mean squared errors (MSE) of 0.004645 and 0.000856, respectively<i>.</i> This study highlights the potential of Phumdi-derived PAC as a sustainable adsorbent and showcases the effectiveness of ANN modeling in optimizing adsorption efficiency and predictive accuracy, offering an environmentally friendly solution for water treatment.</p></div>","PeriodicalId":808,"journal":{"name":"Water, Air, & Soil Pollution","volume":"236 5","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143769733","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":"Performance and Mechanism of Tailings Biochar Composites for Synergistic Phytoremediation of Soil Heavy Metal Cd","authors":"Han Zhang,&nbsp;Xiaodong Wu,&nbsp;Qiao Zhang,&nbsp;Gang Xue,&nbsp;Xinhui Duan,&nbsp;Jinsheng Liang,&nbsp;Cairong Gong","doi":"10.1007/s11270-025-07895-2","DOIUrl":"10.1007/s11270-025-07895-2","url":null,"abstract":"<div><p>In recent years, soil heavy metal pollution and the accumulation of tailings and food waste cannot be ignored. Currently, soil remediation agents are expensive or have poor remediation effects. In this experiment, alkali-modified tailings biochar composite (MTB) was prepared by low-temperature pyrolysis using tailings and food waste as raw materials for the remediation of soil heavy metal Cd. MTB has a large number of oxygen-containing functional groups on its surface (Si–O, Fe–O, -OH, C-O, -COOH), which is favorable for the adsorption of the heavy metal Cd. The adsorption behavior is consistent with the Langmuir model and the proposed second-order kinetic equation, and the adsorption mechanism is mainly complexation and precipitation. 650 °C pyrolysis preparation of MTB3 reduced bioavailable cadmium by 83% in 35 days, and the active Cd was transformed into inactive Cd. Potting experiments showed that ryegrass biomass significantly increased.Adding 8% MTB3 to ryegrass significantly reduced Cd accumulation, lowering available cadmium by 86.4% in 35 days compared to the control (CK). Tailings biochar improved soil properties, boosting plant germination and height by 26.94% to 106%. The study showed that tailings biochar composites have good prospects for remediation of soil heavy metal Cd pollution.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":808,"journal":{"name":"Water, Air, & Soil Pollution","volume":"236 5","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143769731","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}