Journal of Environmental Chemical Engineering最新文献

{"title":"Enhancing biomass productivity and parabens degradation in microalgae using organic carbon sources: Co-metabolism mechanisms and transcriptomic insights","authors":"Jing Yang ,&nbsp;Zhihong Yin ,&nbsp;Yuhong Li ,&nbsp;Lei Tian ,&nbsp;Qi Wang ,&nbsp;Hanglong Ma ,&nbsp;Juan Zhou ,&nbsp;Mingshi Zhu ,&nbsp;Shaoqi Zhou","doi":"10.1016/j.jece.2025.117502","DOIUrl":"10.1016/j.jece.2025.117502","url":null,"abstract":"<div><div>The accumulation of endocrine disruptor compounds in aquatic environments raises environmental pollution concerns. Parabens are widely used as preservatives, and their environmental contamination poses serious threats to ecosystems and human health. Microalgae-based bioremediation techniques can effectively degrade organic contaminants. However, the low activity of microalgae toward parabens hinders the practical application of paraben removal. In this study, we investigated the mechanism of co-metabolism of methylparaben (MetP) by <em>Chlorella sorokiniana</em> by adding the addition of four different organic carbons. The results showed that acetate significantly increased the biomass production of the microalgae. Microalgal biomass increased by 48 %, chlorophyll a, b and carotenoids contents increased to 23.12 mg L⁻¹, 8.1 mg L⁻¹ and 5.7 mg L⁻¹, respectively. Meanwhile, acetate effectively alleviated the oxidative stress in the microalgae, enhanced the activity of antioxidant enzyme, and promoted the secretion of polysaccharides by extracellular polymeric substances (EPS). The ability to co-metabolize MetP was accelerated, and the degradation rate reached 65 %. In addition, nine major metabolites resulting from demethylation, dihydroxylation, dehydroxylation and oxidation reactions were identified. Transcriptomic analysis studies showed that acetate significantly enhanced biosynthetic processes and mediated photosynthesis, oxidative stress, tricarboxylic acid (TCA) cycle and glycolysis-related genes expression. The study demonstrates that adding carbon sources promotes microalgal biomass production and enhances the remediation of aquatic environments.</div></div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":"13 5","pages":"Article 117502"},"PeriodicalIF":7.4,"publicationDate":"2025-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144296977","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dual-sulfur defects decorated 1T-WS2/Cd0.5Zn0.5S heterojunctions for boosted photocatalytic hydrogen evolution","authors":"Mei Dong,&nbsp;Wenjun Li,&nbsp;Liang Geng,&nbsp;Ruixue Huang,&nbsp;Hongli Han,&nbsp;Yuan Liu","doi":"10.1016/j.jece.2025.117500","DOIUrl":"10.1016/j.jece.2025.117500","url":null,"abstract":"<div><div>Defect engineering has emerged as a powerful strategy for enhancing photocatalytic performance. In this paper, a novel dual-defect 1T-WS₂/Cd_0.5Zn_0.5S (WS_v/CZS_v) Schottky heterojunction was successfully fabricated via a combined solvothermal-hydrothermal approach. Electron paramagnetic resonance (EPR) and high-resolution TEM (HRTEM) confirmed the presence of dual sulfur vacancies. The optimized WS_v/CZS_v composite exhibits exceptional hydrogen evolution performance, achieving a remarkable rate of 3060.63 μmol·g⁻¹·h⁻¹, which are 9.83 and 2.54 times higher than that of pure CZS and CZS_v, respectively. Notably, the catalyst maintained over 90 % of its initial activity after four consecutive photocatalytic cycles, demonstrating superior stability. Comprehensive characterization through electrochemical impedance spectroscopy (EIS), steady-state photoluminescence (PL), and transient photocurrent measurements revealed that the dual-defect system significantly enhances carrier separation efficiency. This improvement arises from three synergistic effects: electron-trapping capability of dual defect sites, elevated Schottky barrier, and superior electrical conductivity of the 1T-WS₂. Furthermore, the metallic characteristics and sulfur vacancies in 1T-WS₂ synergistically provide abundant active sites for photocatalytic hydrogen evolution on both basal planes and edges. Density functional theory (DFT) calculations indicate that the dual defects optimize charge distribution and achieve an ideal hydrogen adsorption free energy. The energy band alignment and charge transfer mechanism were systematically investigated using Mott-Schottky (M-S) analysis and ultraviolet photoelectron spectroscopy (UPS). This work explores the synergistic interactions between different types of sulfur defects and provides new insights into the coupling of defect engineering.</div></div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":"13 5","pages":"Article 117500"},"PeriodicalIF":7.4,"publicationDate":"2025-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144241063","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Use of hydrothermal pretreatment for enhanced anaerobic digestion of PBAT and PBS: Biogas production and energy balance","authors":"Gyung-Geun Oh ,&nbsp;Inju Hwang ,&nbsp;Sang-Leen Yun ,&nbsp;Jeong-Hee Kang ,&nbsp;Dong-Hoon Kim ,&nbsp;Seongwon Im ,&nbsp;Sungwon Kang","doi":"10.1016/j.jece.2025.117498","DOIUrl":"10.1016/j.jece.2025.117498","url":null,"abstract":"<div><div>Biodegradable plastics (BPs) have been identified as a viable feedstock for anaerobic digestion (AD), offering a promising solution to meet the current renewable energy demand. However, certain types of BPs still require pretreatment technologies to enhance their biogas production potential. This study aimed to evaluate the feasibility of hydrothermal pretreatment (HTP) at 150, 175, and 200 °C for either 1 or 3 h in improving the AD performance for treating polybutylene adipate terephthalate (PBAT) and polybutylene succinate (PBS). The pretreatment enhanced solubilization efficiency of both BPs, and in particular, PBS was completely solubilized after HTP at 200 °C for 3 h. The CH₄ yields of PBAT and PBS increased to 550 L CH₄/kg VS and 580 L CH₄/kg VS, respectively. However, HTP of BPs at 200 °C for 3 h resulted in a significant decline in CH₄ yield, likely due to the generation of recalcitrant materials. A strong correlation was observed between solubilization efficiency and CH₄ yield for PBS, whereas PBAT exhibited a lower correlation. In the energy balance analysis (EBA) of the AD process combined with HTP, HTP was a major contributor to energy consumption, and a positive net energy balance (<em>E</em>_<em>net</em>) was obtained under all conditions, except for PBAT treated with HTP at 150 °C for 1 h. The peak energy output (<em>E</em>_{<em>output</em>})/energy input (<em>E</em>_{<em>input</em>}) ratio was 5.9 for PBAT and 6.8 for PBS, indicating that the <em>E</em>_{<em>output</em>} could sufficiently offset the <em>E</em>_{<em>input</em>}. Thus, HTP is considered a feasible method for treating PBAT and PBS when integrated with the mesophilic AD process.</div></div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":"13 5","pages":"Article 117498"},"PeriodicalIF":7.4,"publicationDate":"2025-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144296927","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of geomembrane defects on the degradable contaminant transport through composite geomembrane cutoff walls: A novel transient model","authors":"Chun-Hui Peng ,&nbsp;Xiang-Hong Ding ,&nbsp;Hong-Xin Chen ,&nbsp;Yong He ,&nbsp;Biao Luo","doi":"10.1016/j.jece.2025.117506","DOIUrl":"10.1016/j.jece.2025.117506","url":null,"abstract":"<div><div>Composite geomembrane cutoff walls (CGCW) are among the most effective techniques for managing contaminated sites. Accurately predicting contaminant transport through CGCW is essential to the efficient remediation and management of contaminated sites. Previous prediction models have predominantly focused on contaminant diffusion in intact CGCW, with insufficient attention given to CGCW with geomembrane (GMB) defects. This study introduces fully transient models for contaminant transport in a CGCW-aquifer system, comprising an upstream slurry wall, a GMB with defects, a downstream slurry wall, and the adjacent aquifers. The model allows for three types of GMB defects, i.e., joint defects, bottom gaps, and GMB holes, and incorporates the contaminant advection-diffusion-adsorption-degradation process in the CGCW-aquifer system. Results indicate that existing CGCW models overlook the critical impact of GMB positioning on the containment performance of CGCW with GMB defects. The semi-infinite boundary assumption and the non-degradation assumption commonly adopted in previous models lead to, respectively, an underestimation and overestimation of contaminant plume concentrations in the downstream aquifer. Additionally, increasing the widths of joint defects, bottom gaps, and GMB holes significantly reduces the containment efficiency of CGCW, especially under conditions of high hydraulic head and low slurry wall permeability. To address this, an equivalent design curve for CGCW with GMB defects is proposed, offering engineers a practical reference for determining the required wall thickness.</div></div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":"13 5","pages":"Article 117506"},"PeriodicalIF":7.4,"publicationDate":"2025-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144297140","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synergistic adsorption and photocatalytic removal of hexavalent chromium and direct red 23 dye using porous magnetic hydroxyapatite-metakaolin geopolymer granules doped with TiO₂","authors":"Aghilas Brahmi ,&nbsp;Salima Ziani ,&nbsp;Salima AitAli ,&nbsp;Karima Ben Tayeb ,&nbsp;Hania Ahouari ,&nbsp;Tero Luukkonen ,&nbsp;Hervé Vezin","doi":"10.1016/j.jece.2025.117497","DOIUrl":"10.1016/j.jece.2025.117497","url":null,"abstract":"<div><div>This study presents a novel approach to addressing challenges of photocatalysy by TiO₂ powder and the adsorption of anionic pollutants by geopolymers (GP) through the development of granules based on hydroxyapatite-geopolymer (HAP-MK-GP) materials. The synthesized HAP-MK-GP/Fe₃O₄-TiO₂ granules exhibit promising physicochemical properties, including a high porosity of 0.25 cm³ /g, a specific surface area of 106.59 m²/g, notable magnetic behavior (saturation magnetization of 18.89 emu/g), and strong mechanical integrity (compressive strength of 1.63 MPa). The adsorption kinetics and equilibrium data for Direct Red 23 (DR23) dye and hexavalent chromium (Cr(VI)) conformed to the Langmuir isotherm and pseudo-second-order kinetic models, indicating monolayer adsorption on a homogeneous surface. The maximum adsorption capacities were determined as 15.23 mg/g for DR23 and 36.06 mg/g for Cr(VI) under the following conditions: pH of 3, temperature of 21°C, adsorbent dosages of 4 g/L for DR23 and 2 g/L for Cr(VI), and initial pollutant concentrations of 100 mg/L. Under UV irradiation, the granules demonstrated high photocatalytic efficiency for DR23 degradation, achieving removal rates exceeding 95 % under optimized conditions: pH of 3, temperature of 21°C, 4 g/L of dose, and <span><math><mrow><msub><mrow><mspace></mspace><mo>[</mo><mi>DR</mi><mn>23</mn><mo>]</mo><mspace></mspace></mrow><mrow><mn>0</mn></mrow></msub><mi>of</mi><mspace></mspace><mn>50</mn><mi>mg</mi><mo>/</mo><mi>L</mi></mrow></math></span>. Electron paramagnetic resonance (EPR) confirmed the generation of reactive radicals (•OH and O₂•⁻), crucial for photocatalytic activity. Chemical oxygen demand (COD) and total organic carbon (TOC) analyses corroborated the significant mineralization of DR23 dye. These findings underscore the potential of HAP-MK-GP/Fe₃O₄-TiO₂ granules as a highly efficient dual-function photocatalyst-adsorbent material for wastewater treatment applications.</div></div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":"13 5","pages":"Article 117497"},"PeriodicalIF":7.4,"publicationDate":"2025-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144297250","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pilot study on hardness removal from groundwater using a combined crystallization pellet-fluidized bed, ultrafiltration, and reverse osmosis process","authors":"Yaoxu Yue ,&nbsp;Ruizhu Hu ,&nbsp;Xiaowen Wang ,&nbsp;Na Zhong ,&nbsp;Tinglin Huang ,&nbsp;Gang Wen ,&nbsp;Kai Li","doi":"10.1016/j.jece.2025.117511","DOIUrl":"10.1016/j.jece.2025.117511","url":null,"abstract":"<div><div>The application of ultrafiltration (UF) reverse osmosis (RO) (a dual-membrane process) faces the key challenges of fouling of the RO membrane and scaling on the concentrate pipeline. However, this challenge could potentially be addressed by combining the dual-membrane process with the chemical crystallization circulating pellet-fluidized bed (CrystPFB) process and using it as a pretreatment step to soften the feed water into the dual-membrane process. To demonstrate and validate the proposed approach, a pilot study of the combined crystallization pellet-fluidized bed, ultrafiltration, and reverse osmosis process (CrystPFB-UF-RO) was performed at a water treatment plant in Shaanxi Province, China, using the dual-membrane process to treat high-hardness groundwater. At a sodium hydrate dosage of 100–350 mg/L, the CrystPFB reduced the calcium ion concentration and total hardness of the raw water by 55–98 % and 40–65 %, respectively. The calcium ion crystallization efficiency reached up to 80 %. With hydrochloric acid dosed in the softened water, the pH of the softened water was maintained between 6.5 and 8.5, and the turbidity remained &lt; 5 NTU (nephelometric turbidity unit). The operating time of the UF-RO process fed with softened water with a calcium removal ratio of 70 % before reaching the thresholds for chemical cleaning, as defined by the normalized water yield, normalized membrane pressure decrease, and normalized salt passage ratio was extended by 3.4, 3.4, and 5.0 times, respectively, compared to when the UF-RO process was fed with raw water. Moreover, the calculated scaling indices of the concentrate from the UF-RO process indicated that the concentrate pipeline would not be scaled. RO membranes that reached the thresholds for cleaning were characterized and analyzed. Scaling increased along the water flow direction of the membranes, and the scaling on the membrane surface was dominated by CaCO₃. We proposed a modeling method for the deposition of CaCO₃ on the surface of RO membranes in a combined system, offering a practical mathematical model for applying combined process systems in engineering practice. Our results provide theoretical criteria and data support for the application of CrystPFB-dual-membrane combined process in real-world engineering.</div></div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":"13 5","pages":"Article 117511"},"PeriodicalIF":7.4,"publicationDate":"2025-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144297043","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bimetallic-organic frameworks derived Bi-doped CeO2 nanorods with oxygen vacancies for boosted photo-Fenton activity","authors":"Xiaorui Zhang ,&nbsp;Laiqing Zhang ,&nbsp;Hanlin Ye ,&nbsp;Zikang Zeng ,&nbsp;Jian Yang ,&nbsp;Chuang Han ,&nbsp;Yujun Liang","doi":"10.1016/j.jece.2025.117489","DOIUrl":"10.1016/j.jece.2025.117489","url":null,"abstract":"<div><div>Metal ions doping has attracted noteworthy attention for tuning the electronic structure of semiconductors. However, high doping content usually leads to the formation of heterophase or impurity. Herein, ultra-high Bi-doped CeO₂ nanorods (doping amount up to 20 mol%) without dopant segregation were fabricated by pyrolyzing Bi/Ce bimetallic-organic frameworks (Bi/Ce-BMOFs), and adaptive oxygen vacancies (OVs) were introduced. The Bi-doped CeO₂ not only retains the unique porous structure of Bi/Ce-BMOFs, thus possessing a large specific surface area, but also significantly enhances the visible-light response and promotes the redox cycling of Ce³⁺ /Ce⁴⁺ ion pairs, thereby accelerating the efficient activation of H₂O₂. Moreover, the adaptive OVs serve as electron-trapping sites, further facilitating the separation of charge carriers. Consequently, the Bi-doped CeO₂ exhibits an excellent photo-Fenton degradation efficiency of tetracycline (TC) over a broad pH range (pH = 2–9). Mechanistic studies revealed that ·O₂^– and ⋅OH are the dominant reactive species. Additionally, the possible degradation pathways of TC were explored using joint characterizations. The ecotoxicity of intermediate products formed during the degradation process was also assessed. This work demonstrates the great potential of the Bi-CeO₂ heterojunction in antibiotic degradation and risk control, providing a feasible strategy for designing efficient and stable catalyst with heteroatom doping derived from BMOFs.</div></div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":"13 5","pages":"Article 117489"},"PeriodicalIF":7.4,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144297218","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Application of Cu5.5Fe1 catalyst from fluidized-bed crystallization reactor for treatment of RB5 azo dye using a Fenton-like system","authors":"Rui-Hong Jiang ,&nbsp;Thi-Hanh Ha ,&nbsp;Chart Chiemchaisri ,&nbsp;Wen-Yu Chen ,&nbsp;Ming-Chun Lu","doi":"10.1016/j.jece.2025.117483","DOIUrl":"10.1016/j.jece.2025.117483","url":null,"abstract":"<div><div>This work investigates the potential of repurposing a by-product from wastewater treatment as a catalyst in a heterogeneous photo-Fenton-like system for removing a model organic dye. A bimetallic Fe-Cu catalyst was employed to facilitate a heterogeneous Fenton-like reaction under visible light irradiation. Key variables—such as solution pH, catalyst loading, hydrogen peroxide dosage, initial dye concentration, and light exposure—were systematically optimized. The best performance was observed at pH 6.5 with 2 g/L catalyst and 80 % of the theoretical H₂O₂ requirement, resulting in almost complete decolorization of Reactive Black 5 (RB5) within 60 min and a mineralization rate of 96.9 %. Electron spin resonance (ESR) analysis, employing DMPO and TEMP as spin-trapping agents, confirmed the generation of hydroxyl radicals (•OH), superoxide anions (•O₂⁻), and singlet oxygen (¹O₂) during the process. This study highlights the efficiency of a catalyst derived from industrial wastewater containing Fe and Cu, demonstrating superior performance compared to catalysts produced from commercial precursors. The findings support the circular economy concept by turning hazardous waste into a valuable resource for environmental remediation.</div></div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":"13 5","pages":"Article 117483"},"PeriodicalIF":7.4,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144297064","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Graphite fiber felt modification at room temperature for enhanced and selective H₂O₂ electro-production","authors":"Abed-Alhakeem Azaiza,&nbsp;Raphael Semiat,&nbsp;Hilla Shemer","doi":"10.1016/j.jece.2025.117487","DOIUrl":"10.1016/j.jece.2025.117487","url":null,"abstract":"<div><div>Hydrogen peroxide (H₂O₂) is widely used in water treatment, disinfection, and chemical synthesis. A sustainable and on-site method for H₂O₂ production is electrochemical synthesis via the two-electron oxygen reduction reaction. This study investigated the enhancement of H₂O₂ electro-production via acidic oxidation of graphite fiber felt (GF) at room temperature using sulfuric acid (H₂SO₄), nitric acid (HNO₃), and hydrochloric acid (HCl). Characterization using scanning electron microscopy, Raman spectroscopy, Fourier-transform infrared spectroscopy, conductivity measurements, and contact angle analysis revealed significant structural and surface changes post-treatments, introducing structural defects, enriched functional groups, enhanced hydrophilicity, and reduced conductivity. Electrochemical analyses, including cyclic voltammetry and rotating ring disk electrode techniques, confirmed improved H₂O₂ selectivity and yield, with optimal electro-production observed for 4 M H₂SO₄, 7 M HCl, and 10 M HNO₃ treatments. H₂SO₄-treated GF exhibited the highest activity, achieving equilibrium H₂O₂ concentrations of 163.9 mg/L, exceeding raw (8.5 mg/L), HCl-treated (41.0 mg/L) and HNO₃-treated (46.4 mg/L) GFs. Pearson correlation analysis revealed strong linear relationships between the GF properties (i.e., defects, conductivity, functional groups, and hydrophilicity) and H₂O₂ electro-production. Electrochemical activity and selectivity correlated strongly with these modified properties, validating their collective role in enhancing electro-production efficiency.</div></div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":"13 5","pages":"Article 117487"},"PeriodicalIF":7.4,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144297069","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Simplified synthetic community reveals the enrichment of phthalate-degrading bacteria in maize rhizosphere enhancing phthalate degradation","authors":"Jia-Lu Wei ,&nbsp;Yu-Hong Huang ,&nbsp;Jun-Hua Li ,&nbsp;Huixiong Lü ,&nbsp;Hai-Ming Zhao ,&nbsp;Lei Xiang ,&nbsp;Hui Li ,&nbsp;Yan-Wen Li ,&nbsp;Ce-Hui Mo ,&nbsp;Quan-Ying Cai ,&nbsp;Qing X. Li","doi":"10.1016/j.jece.2025.117495","DOIUrl":"10.1016/j.jece.2025.117495","url":null,"abstract":"<div><div>Agricultural soil contamination by toxic pollutants like phthalates (PAEs) threatens soil health and food safety, and urgently requires efficient remediation. Rhizoremediation has emerged as a promising approach, leveraging the biodegradation capabilities of microbes in rhizosphere to enhance PAE removal. However, how these PAE-degraders function and cooperate in rhizosphere contributing to PAE degradation remain poorly understood. This study employed the strategy of synthetic community to explore how maize rhizosphere enrich PAE-degrading bacteria and regulate microbial cooperation for enhancing PAE degradation. Four PAE-degrading bacterial strains (i.e., <em>Paenarthrobacter</em> sp. R6, <em>Mycobacterium</em> sp. R14, <em>Rhizobium</em> sp. R15, and <em>Arthrobacter</em> sp. R25) which were isolated from maize rhizosphere showed varied degradation efficiencies (14 % - 97 %) for recalcitrant di-(2-ethylhexyl) phthalate (DEHP). These strains were constructed into a simplified synthetic community SynCom-4 which exhibited superior DEHP degradation capacity compared to individual strains, and could completely degrade DEHP through extra-/intra-cellular enzyme reaction and metabolic exchange. Recolonization experiments indicated that SynCom-4 more significantly enhanced DEHP dissipation in rhizosphere than those in bulk soil (68.7 % <em>vs.</em> 65.2 % in bulk soil; 78 % <em>vs.</em> 71.7 % in rhizosphere by 50 d). SynCom-4 showed higher colonization efficiency in rhizosphere than bulk soil. Enrichment of SynCom-4 and their cooperative partners (e.g., genera <em>Chitinophaga</em> and <em>Sphingobium</em>) in rhizosphere facilitated DEHP degradation with 17 % - 39 % higher DEHP dissipation percentages than those in bulk soil without inoculation. In conclusion, enrichment of PAE-degrading bacteria and the microbial cooperations in maize rhizosphere remarkably contributed to enhance PAE degradation, which were significant for rhizoremediation of large-scale PAE-polluted agricultural soil.</div></div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":"13 5","pages":"Article 117495"},"PeriodicalIF":7.4,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144297225","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}