ACS ES&T engineering最新文献

{"title":"Biotic Acid Mine Drainage (AMD) Suppression Using Biogas Slurry: Identification of Key Inhibitory Components and Molecular Inactivation Mechanism of Acidithiobacillus ferrooxidans","authors":"Xin Li,&nbsp;Jing Sun,&nbsp;Shi-jie Yuan,&nbsp;Bin Dong* and Zu-xin Xu,&nbsp;","doi":"10.1021/acsestengg.4c0028710.1021/acsestengg.4c00287","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00287https://doi.org/10.1021/acsestengg.4c00287","url":null,"abstract":"<p >Acid mine drainage (AMD) is a significant environmental challenge, and its treatment can be expensive and complicated. <i>Acidithiobacillus</i> could accelerate the rate of AMD formation by 5–6 orders of magnitude. <i>Acidithiobacillus ferrooxidans</i> (<i>A. ferrooxidans</i>) is the model species of <i>Acidithiobacillus</i>. We initially tried to use the biogas slurry as an organic additive to prevent AMD formation. We determined the essential inhibitory components of the biogas slurry as organic acids (acetic acid (AA), a typical example). The results revealed that AA (≥50 ppm) prevented <i>A. ferrooxidans</i> from forming AMD. The transcriptomic and untargeted metabolomic evaluation found 324 differentially expressed genes and 35 significantly transformed metabolites. Combinatorial omics analysis showed that the presence of AA significantly inhibited the membrane biogenesis, Fe²⁺, and RISC metabolism pathways, reducing energy metabolites such as Fe³⁺ and SO₄^2–. Furthermore, AA treatment induced <i>A. ferrooxidans</i> defense mechanisms and overconsumed its internal carbon sources. These findings proved that biogas slurry had a significant inhibitory effect on key microorganisms in highly acidified mineral soils and provided a scientific foundation for the prevention of acidification and the ecological restoration of newly mined areas.</p>","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"4 12","pages":"2898–2911 2898–2911"},"PeriodicalIF":7.4,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142844082","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 Peroxydisulfate Activation with Crystalline Iron-Based Ternary Chalcogenides (Fe2GeS4) for Organic Micropollutant Degradation","authors":"Seid Mingizem Gashaw,&nbsp;Aseom Son,&nbsp;Wondesen Workneh Ejerssa,&nbsp;Seung Yong Lee,&nbsp;Seongpil Jeong,&nbsp;Dong Ki Lee,&nbsp;Kangwoo Cho and Seok Won Hong*,&nbsp;","doi":"10.1021/acsestengg.4c0049010.1021/acsestengg.4c00490","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00490https://doi.org/10.1021/acsestengg.4c00490","url":null,"abstract":"<p >Peroxydisulfate (PDS)-based processes are an effective approach for eliminating emerging organic micropollutants (MPs) in (waste)water treatment. Iron-based homogeneous systems are known for their availability, technical and economic feasibility, and relatively nontoxic nature; however, these systems suffer from drawbacks that limit their application. Herein, an iron-based ternary chalcogenide material, Fe₂GeS₄ nanocrystals (FGS NCs), was used to activate PDS for the removal of bisphenol A (BPA). The FGS/PDS system achieved complete removal of BPA at circumneutral pH with a high reaction stoichiometric efficiency (7.8%), outperforming common PDS activators, such as Fe(II), pyrite, zerovalent iron, and black iron oxide. The synergistic enhancement in PDS activation could be attributed to the improved Fe(III)/Fe(II) cycle due to the reduced sulfur and divalent germanium species in the olivine FGS NCs. This finding was confirmed by mechanistic investigations and chromatographic, spectroscopic, and density functional theory studies. Both high-valent iron-oxo (Fe^IV) species (dominant) and sulfate radicals (auxiliary) contributed to BPA transformation, where the solution chemistry (pH, temperature, substrate dose, and anions) influenced the removal of BPA from the FGS/PDS system. Evaluation of the performance of the FGS/PDS system in real water matrices (river water, groundwater, and secondary effluents) revealed its long-term stability and efficiency in removing multiple MPs, including acetaminophen, <i>N,N</i>-diethyl-<i>m</i>-toluamide, perfluorooctanoic acid, 4-chlorophenol, benzotriazole, and ethylparaben. Overall, these findings highlight the potential of FGS/PDS for effective MPs removal in (waste)water treatment.</p>","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"5 1","pages":"191–203 191–203"},"PeriodicalIF":7.4,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143091670","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":"Recovering Volatilized Salts from MSWI Fly Ash into Different Metal Species with High Purifies","authors":"YeJia Lv,&nbsp;Zixiang Cai,&nbsp;Huimin Huo*,&nbsp;Guangren Qian,&nbsp;Yang Yue and Jia Zhang*,&nbsp;","doi":"10.1021/acsestengg.4c0055010.1021/acsestengg.4c00550","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00550https://doi.org/10.1021/acsestengg.4c00550","url":null,"abstract":"<p >Thermal sintering/melting technology is a hot topic for the treatment of municipal solid waste incineration with fly ash (FA) nowadays. Most attention is focused on the safety of the treated FA, but seldom focus is put on the separation of thermally volatile metal salts. In this work, we investigated a thermal-sediment control method for effective separation of Zn, Pb, Cu, Cd, K, and Na from FA. Volatilized solids collected from different sediment zones (according to their distances from the FA source) are compared in detail under controlling gas flow rates and heating temperatures. As a result, 52 wt % of Cd and 54 wt % of Pb are first separated in different zones, and 53 wt % of Zn and 52 wt % of Cu are second separated in different zones. Finally, Na and K are recovered together. Pb and Zn purities are as high as 93–94 wt %. What is more, recovery rates of metals from FA follow the order of 90 wt % (Pb) &gt; 83 wt % (Zn) &gt; 81 wt % (Cd) &gt; 77 wt % (Cu) &gt; 73 wt % (Na) &gt; 66 wt % (K). A volatilization-condensation mechanism is put forward to explain the separation of different metal salts. The main result of this work helps the development of the “zero-waste city” concept, which is also in favor of green development and circular economy.</p>","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"5 2","pages":"424–433 424–433"},"PeriodicalIF":7.4,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143402174","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":"Insight into Redox Sites and Intermolecular Interactions of Soil Dissolved Organic Matter through Diverse-Compost Applications Using VSOMM2 and Schrödinger","authors":"Xinyu Zhao,&nbsp;Beidou Xi*,&nbsp;Yan Wang,&nbsp;Qiuling Dang,&nbsp;Zebin Tian,&nbsp;Danmei Cai and Yun Lu,&nbsp;","doi":"10.1021/acsestengg.4c0047610.1021/acsestengg.4c00476","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00476https://doi.org/10.1021/acsestengg.4c00476","url":null,"abstract":"<p >Substituting chemical fertilizers with compost is anticipated to facilitate the disposal of organic waste and mitigate nonpoint source pollution. However, research investigating the impact of diverse-compost utilization on the chemical reactivity of soil at the molecular-level remains lacking. Herein, the quantification and identification of molecular-scale redox sites and intermolecular interactions of soil dissolved organic matter (DOM) using diverse composts during a crop rotation cycle were investigated using the unified theoretical modeling approach VSOMM2 and Schrödinger. Results showed that compost use considerably altered the molecular weight and composition of soil DOM. In particular, we successfully optimized the validity coefficient of the unit model’s molecular number to construct 38 molecular models of DOM molecules to identify and quantify the distribution of redox sites and intermolecular interactions within soil DOM molecules. Moreover, the distinct roles of different composts in modulating redox molecules within the soil DOM were determined during a crop rotation cycle. The application of cow manure compost considerably increased the quinone, Ar–COOH, and Ar–SH contents in Model(EAC+), while application of food waste compost enhanced the Ar–OH and Ar–NH₂ in Model(EDC+). Finally, rotatable bonds, cation−π interactions, aromatic H-bonds, π-stacking, and salt bridges were identified to facilitate electron transfer within the redox molecules of soil DOM, which can be further enhanced via compost use. The findings of this study provide insights into the environmental biochemical reactions involving microcatalysts, metal reduction fate, pollution fate, and molecular composition of soil, providing a theoretical basis for enhancing soil reactivity using organic fertilizers instead of chemical fertilizers.</p>","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"5 1","pages":"137–148 137–148"},"PeriodicalIF":7.4,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143091819","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":"3D g-C3N4/WS2/Agarose Aerogel Photocatalyst for Near-Complete Degradation of Broad-Spectrum Antibiotics in Batch and Continuous Flow Modes","authors":"Mario Vino Lincy Gnanaguru,&nbsp;Debanjali Dey,&nbsp;Makarand M. Ghangrekar,&nbsp;Ramkrishna Sen and Shamik Chowdhury*,&nbsp;","doi":"10.1021/acsestengg.4c0057910.1021/acsestengg.4c00579","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00579https://doi.org/10.1021/acsestengg.4c00579","url":null,"abstract":"<p >Heterojunction-based photocatalysts are receiving tremendous scientific attention for eliminating consumer-derived micropollutants from aqueous environments. However, the inherent difficulty in recovering photocatalysts following treatment, due to their application in powder form, precludes their widespread use. Herein, a self-supporting and lightweight three-dimensional (3D) graphitic carbon nitride (g-C₃N₄)/tungsten disulfide (WS₂)/agarose aerogel (GCWAA) was constructed via a facile and scalable radial freeze-casting approach. The as-synthesized 3D GCWAA proved extremely promising for the photocatalytic removal of three broad-spectrum antibiotic pollutants (ABPs), viz., tetracycline (94%), sulfamethoxazole (97%), and ofloxacin (96%), within 90 min of visible light irradiation in the batch regime. The enhanced photocatalytic performance of 3D GCWAA can be attributed to a Z-scheme electron flow from g-C₃N₄ to WS₂ in the aerogel, as inferred from electronic band structure characterization. To further demonstrate the practical utility of the composite aerogel in water and wastewater treatment systems, the continuous flow photocatalysis of ABPs over 3D GCWAA was systematically studied. Specifically, the influence of several noteworthy operational parameters, such as flow rate, solution pH, and the presence of interfering ions was comprehensively investigated. Interestingly, under optimized conditions, GCWAA achieved a remarkable average removal efficiency of 95% for ABPs in continuous mode, with minimal loss of activity over time. More attractively, GCWAA exhibited decent photocatalytic performance for treating a ternary mixture of ABPs in both freshwaters and wastewaters in the continuous flow reactor. The results of this study showcase the ultimate lab-scale demonstration of the photocatalytic potential of 3D GCWAA for the degradation of emerging contaminants, paving the way for future scale-up.</p>","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"5 2","pages":"515–530 515–530"},"PeriodicalIF":7.4,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143402173","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":"Hydrogen Production Promotion from Nonrecyclable Plastic Waste via a Single-Step Catalytic Thermal Cracking/Steam Reforming Scheme","authors":"Mario J. Muñoz-Batista*,&nbsp;Gabriel Blázquez,&nbsp;Rafael R. Solís,&nbsp;Antonio Pérez,&nbsp;M.Ángeles Martín-Lara and Mónica Calero*,&nbsp;","doi":"10.1021/acsestengg.4c0043110.1021/acsestengg.4c00431","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00431https://doi.org/10.1021/acsestengg.4c00431","url":null,"abstract":"<p >A complete analysis of a catalytic pyrolysis scheme, evolved to a combined in situ thermal cracking/steam reforming scheme, to valorize nonrecyclable plastic waste is presented. The study aims to analyze the three fractions obtained, focusing on the production of a hydrogen-rich gaseous fraction with industrial interest. The optimization in terms of hydrogen generation is carried out using various ruthenium-containing catalytic systems prepared by a facile preparation method. Several catalytic systems were tested, all ruthenium-containing materials interacting with g-C₃N₄, ZSM5, high-surface-area carbon, and TiO₂ as active supports. In the combined reaction scheme defined by catalytic cracking/steam reforming reactions at 550 °C of the pyrolysis gases using a RuO₂/TiO₂ composite system in a one-step reaction system, 270.7 mmol of hydrogen (13.5 mmol g^–1 of plastic waste) were obtained, representing an increase of 227.6 mmol in comparison with the traditional thermochemical process. The contribution is completed with a characterization scheme of the obtained product fractions and composite catalysts, including a postreaction analysis, which allowed the identification of the main properties (catalysts) and operating conditions (setup) to optimize the process.</p>","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"5 1","pages":"22–35 22–35"},"PeriodicalIF":7.4,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsestengg.4c00431","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143091621","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"From Literature to Action: Analyzing How Nitrogen and Phosphorus Removal Responds to Different Design Factors in Free Water Surface Constructed Wetlands","authors":"Mohamed S. Gaballah*,&nbsp;Hooshyar Yousefyani and Roderick W. Lammers,&nbsp;","doi":"10.1021/acsestengg.4c0039210.1021/acsestengg.4c00392","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00392https://doi.org/10.1021/acsestengg.4c00392","url":null,"abstract":"<p >Despite the increasing number of studies on nitrogen (N) and phosphorus (P) removal in free water surface (FWS) wetland systems, there is still a gap in understanding the influence of design variables on the system performance. To address this, we conducted a global meta-analysis of 73 studies employing advanced statistical techniques, kinetic models, and machine learning along with variable importance analysis. The results indicated that random forest (<i>R</i>² = 0.55–0.77) and artificial neural network (<i>R</i>² = 0.5–0.85) were the best fitting models for TN and TP removal in pilot-scale and large-scale systems. Moreover, permutation importance results using different wetland design variables indicated that the inflow concentration, plant coverage, hydraulic loading rate, and system area are considered the most important variables for N and P removal under large-scale conditions, while the hydraulic retention time, inflow concentration, and water depth are deemed the most important variables under pilot-scale conditions. Furthermore, the removal of N and P was higher in pilot-scale (54.6% and 56.7%) systems compared to that in large-scale (29.0% and 41.9%) systems. Also, the interactions between design variables and the removal process of N and P were investigated to better understand the specific roles of these variables in improving the removal performance.</p>","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"4 12","pages":"2974–2986 2974–2986"},"PeriodicalIF":7.4,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsestengg.4c00392","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142851215","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nickel Enhances InPd-Catalyzed Nitrate Reduction Activity and N2 Selectivity","authors":"Kiheon Hong,&nbsp;Daniel J. Rivera,&nbsp;Juan Donoso,&nbsp;Bongki Shin,&nbsp;Hunter P. Jacobs,&nbsp;Byeong Jun Cha,&nbsp;Kimberly N. Heck,&nbsp;Welman C. Elias,&nbsp;Paul Westerhoff,&nbsp;Yimo Han,&nbsp;Christopher Muhich and Michael S. Wong*,&nbsp;","doi":"10.1021/acsestengg.4c0055210.1021/acsestengg.4c00552","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00552https://doi.org/10.1021/acsestengg.4c00552","url":null,"abstract":"<p >Palladium–indium (PdIn) is a well-established bimetallic composition for reductively degrading nitrate anions, one of the most ubiquitous contaminants in the groundwater. However, the scarcity and the variable price of these rare-earth and platinum group critical metals may hinder their use for water treatment. Nickel (Ni), a nonprecious metal in the same element group as Pd, could partially replace and lower Pd usage if the resulting trimetallic composition is sufficiently catalytically active. Herein, we report the synthesis and nitrate reduction catalysis of activated carbon-supported “In-on-Pd-on-Ni” catalysts (InPdNi/AC). While bimetallic InPd/AC (0.05 wt % In, 1.3 wt % Pd) was expectedly active, trimetallic InPdNi/AC containing the same In amount, much less Pd (0.1 wt %), and 1 wt % Ni was &gt;17 more active (<i>k</i>_cat ≈ 20 vs 349 L min^–1 g_{surface metal}^–1). X-ray photoelectron spectroscopy (XPS) and density functional theory (DFT) calculations showed that Pd gained electron density from Ni, correlating to the increased nitrate reduction activity. Ammonium byproduct selectivity for InPdNi/AC (18% at 50% nitrate conversion) was lower compared to that of InPd/AC (48%), suggestive of the higher surface coverage of NO or its greater reactivity with NO₂^–, which led to more N₂. Accounting for the catalyst precursor, manufacturing costs, and spent metal recovery, we calculated that Ni incorporation lowered the net catalyst cost significantly (from $1028/kg to $170/kg). The trimetallic composition lowered, by ∼26 times, the catalyst cost of a stirred tank reactor sized to the same treatment capacity as that for the bimetallic case. The results demonstrate that the partial replacement of the precious metal with an earth-abundant one leads to a higher efficiency and lower cost denitrification catalyst, via a material strategy that should be beneficial for other clean-water catalytic systems.</p>","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"5 2","pages":"434–446 434–446"},"PeriodicalIF":7.4,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143402172","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":"Electron Donor-Driven Microalgae Upgrading into High-Value Fatty Acids via a Microbial Platform","authors":"Chen Wang,&nbsp;Wei Wei*,&nbsp;Lan Wu,&nbsp;Xiaoqing Liu,&nbsp;Haoran Duan,&nbsp;Zhijie Chen,&nbsp;Ya-Nan Hou,&nbsp;Xueming Chen and Bing-Jie Ni*,&nbsp;","doi":"10.1021/acsestengg.4c0041410.1021/acsestengg.4c00414","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00414https://doi.org/10.1021/acsestengg.4c00414","url":null,"abstract":"<p >The efficient treatment and energy recovery from salvaged microalgae have been imperative considering both environmental and economic concerns. Herein, this study proposed a biotechnological platform for converting microalgae into medium-chain fatty acids (MCFAs) through anaerobic fermentation as well as exploring the roles of different electron donors (EDs). After exploring various ED combinations, the results suggested that a single ED, especially sole ethanol stimulation, exhibited more pronounced stimulation effects on MCFA production compared to those of the hybrid ED stimulations. Furthermore, ethanol and lactic acid served as the basis for the formation of longer-chain alcohols and odd-chain fatty acids in the liquid fermentation products, respectively. The dynamics and thermodynamics analyses confirmed the distinctions in the accumulation trends and saturated compositions of main products under different ED compositions. Moreover, mechanistic investigations revealed that differences in chain elongation efficiency of ethanol and lactic acid and in the genome-based metabolic potential for the microbial systems contributed to the intricate feedback regulations of biochemical reactions in different microalgae fermentation scenarios. Overall, this study provided valuable insights for sustainable energy conversion of microalgae by orienting toward the recovery of high-value biochemicals, serving as a theoretical basis for the selection and optimization of ED before industrial application.</p>","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"4 12","pages":"3080–3091 3080–3091"},"PeriodicalIF":7.4,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142851225","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":"Mitigation of Pharmaceutical Wastewater Toxicity in Anaerobic Reactors Using Metal-Modified Biochar","authors":"Ahmed Tawfik*,&nbsp;Nawaf S. Alhajeri,&nbsp;Mohamed Elsamadony* and Fangang Meng,&nbsp;","doi":"10.1021/acsestengg.4c0039310.1021/acsestengg.4c00393","DOIUrl":"https://doi.org/10.1021/acsestengg.4c00393https://doi.org/10.1021/acsestengg.4c00393","url":null,"abstract":"<p >Anaerobic sequencing batch reactors (ASBRs) treating wastewater rich in ciprofloxacin (CIP) were supplemented with an Fe/Zn@biochar catalyst to improve their performance. ASBR4, with 100 mg Fe/Zn@biochar/g_VS, showed substantial increased efficiencies in removing COD and CIP, reaching 86.9 ± 5.8 and 80.9 ± 8.6%, respectively, compared to no biochar addition (25.2% and 51.1% higher, respectively). Likewise, biogas yield augmented from 0.17 ± 0.06 to 0.34 ± 0.02 L/g COD_removed owing to the boosted abundance of acetolactic methanogens, i.e., <i>Methanosaeta</i> and <i>Methanosarcina</i>, which increased from 0.4 and 1.6% in the control ASBR1 to 1.6 and 2.2% in ASBR4, respectively. Microbial enzymatic activities, including dehydrogenase and extracellular polymeric substances (EPSs), highly increased by 38% and &gt;100%, respectively, aiding in biochar adsorption and microbial biodegradation synergy. Fe/Zn@biochar contributed to both CIP adsorption and biodegradation with percentages of 59.5 ± 4.9 and 34.7 ± 2.6%, respectively. The synergistic effect between the biotic and abiotic impacts of Fe/Zn@biochar reached 94.2 ± 7.2%, suggesting that the addition of Fe/Zn@biochar is a promising approach to enhance the CIP-remediation process.</p>","PeriodicalId":7008,"journal":{"name":"ACS ES&T engineering","volume":"4 12","pages":"2987–3000 2987–3000"},"PeriodicalIF":7.4,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142851224","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}