Journal of water process engineering最新文献

Macadamia nut shell biochar/Mg-Al LDH composite: A sustainable solution for highly effective phosphate ion removal from water 澳洲坚果壳生物炭/镁铝 LDH 复合材料：高效去除水中磷酸盐离子的可持续解决方案

IF 6.3 2区工程技术

Journal of water process engineering Pub Date : 2024-09-15 DOI: 10.1016/j.jwpe.2024.106164

{"title":"Macadamia nut shell biochar/Mg-Al LDH composite: A sustainable solution for highly effective phosphate ion removal from water","authors":"","doi":"10.1016/j.jwpe.2024.106164","DOIUrl":"10.1016/j.jwpe.2024.106164","url":null,"abstract":"<div>Phosphorus (P) is essential for life, but excessive phosphate (PO43−) causes eutrophication, leading to water quality deterioration. This study aims to investigate the potential of Macadamia nut shells as a sustainable material for removing PO43– ions from water. A composite of biochar derived from Macadamia nut shells (MBC) and Mg-Al layered double hydroxides (Mg-Al LDH) was fabricated and utilized as an adsorbent for PO43– ion removal. The materials were characterized using various techniques and the effect of various parameters on the adsorption performance of prepared adsorbents were evaluated. The highest adsorption capacity was recorded at pH 5.7, while an increment in temperatures 25 °C and 60 °C enhanced the adsorption capacity by 42 %. A variety of kinetic and isotherm models were employed to represent the experimental data accurately. The pseudo-second-order model provided the optimized fit for the PO43– adsorption onto MBC/Mg-Al LDH, indicated by the highest R2 value. The Langmuir isotherm model predicted the highest adsorption capacity of 43.05 mg/g for MBC/Mg-Al LDH, which is comparable to many reported adsorbents. The MBC/Mg-Al LDH composite exhibited excellent regeneration potential, with only a minor loss in adsorption capacity after eight cycles. Moreover, the MBC/Mg-Al LDH showcased remarkable selectivity for PO43– ions, maintaining high adsorption efficiency even when other competing anions and humic acid were present in the solution. The impact of co-existing anions on PO43− removal followed the sequence HCO3− > SO42− > NO3− > Cl−. The findings demonstrate that MBC/Mg-Al LDH is a promising and sustainable solution for pollutant remediation in water.</div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":null,"pages":null},"PeriodicalIF":6.3,"publicationDate":"2024-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142233759","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}

引用次数: 0

Ti-doped fly ash‑aluminum‑iron based composite coagulant for efficient fluoride removal from mine drainage over a wide pH range 掺钛粉煤灰-铝-铁基复合混凝剂在宽 pH 值范围内高效去除矿井排水中的氟化物

IF 6.3 2区工程技术

Journal of water process engineering Pub Date : 2024-09-15 DOI: 10.1016/j.jwpe.2024.106152

{"title":"Ti-doped fly ash‑aluminum‑iron based composite coagulant for efficient fluoride removal from mine drainage over a wide pH range","authors":"","doi":"10.1016/j.jwpe.2024.106152","DOIUrl":"10.1016/j.jwpe.2024.106152","url":null,"abstract":"<div>The concentration of F− (2.67–16.2 mg/L) in mine drainage exceeding the discharge standard is significantly toxic to human health. Traditional coagulants are ineffective in achieving effective fluoride removal over a wide pH range. Therefore, studying novel coagulants suitable for treating fluoridated mine drainage is urgently required. First, we screened the active components of the coagulants, determined their contents, and investigated the effects of the process parameters and coexisting matter. Lastly, we explored the mechanisms of coagulation and fluoride removal using zeta potential, Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), particle size analysis, and microscopy. The results indicated that fly ash could be used as a major component (50 % by mass) when the fluoride removal efficiency exceeded 92 % (residual F− < 1.0 mg/L), synchronizing the reuse of solid waste. Ti-doped coagulants extended the applicable pH range (5.5–8.0). The optimal process parameters were a dosage of 0.8 g/L, pH 6.5, stirring intensity (200 and 40–60 rpm) and time (60 and 120 s) for the mixing and slow flocculation stages, respectively, and a settling time of 5 min. Suspended solids (SS), CO32−, SO42−, and HCO3− all reduced fluoride removal efficiency. F− removal mechanisms during coagulation included coordination exchange and electrostatic adsorption. This study provides practical applications and theoretical references for removing F− from mine drainage.</div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":null,"pages":null},"PeriodicalIF":6.3,"publicationDate":"2024-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142233820","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}

引用次数: 0

Enhancing effect of conductive materials and rumen microorganisms on the anaerobic digestion performance of a real traditional Chinese medicine wastewater 导电材料和瘤胃微生物对真实中药废水厌氧消化性能的促进作用

IF 6.3 2区工程技术

Journal of water process engineering Pub Date : 2024-09-14 DOI: 10.1016/j.jwpe.2024.106157

{"title":"Enhancing effect of conductive materials and rumen microorganisms on the anaerobic digestion performance of a real traditional Chinese medicine wastewater","authors":"","doi":"10.1016/j.jwpe.2024.106157","DOIUrl":"10.1016/j.jwpe.2024.106157","url":null,"abstract":"<div>This work evaluated the effect of different concentrations of conductive materials and rumen microorganisms on the anaerobic digestion (AD) performance of real traditional Chinese medicine (TCM) wastewater. The experiments first determined the optimal organic concentration of 0.25 L/L for the AD system and removed suspended solids from real TCM wastewater to reduce the inhibition effect on methanogenesis. Analysis of the modified Gompertz model showed that the addition of activated carbon, biochar, cow manure, and rumen fluid at doses of 12 g/L, 12 g/L, 12 mL/L, and 125 mL/L, respectively, had the greatest effect on CH4 production, increasing the cumulative CH4 yield by 13.5 %, 10.4 %, 26.8 %, and 32.9 %. Through microbial community and metabolism pathway analyses, the conductive materials promoted direct interspecies electron transfer (DIET) between Clostridium and Methanothrix, and the acetoclastic methanogenic pathway dominated by acetyl-CoA synthase. Rumen microorganisms enhanced AD performance by promoting the growth of hydrogenotrophic methanogens and the abundance of genes dominated by formylmethanofuran dehydrogenase in the hydrogenotrophic methanogenic pathway, illustrating the relationship between microbial community and metabolism pathway. Rumen microorganisms increased CH4 production more than conductive materials in real TCM wastewater. This study helps to better understand the internal mechanisms by which different materials enhance AD performance.</div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":null,"pages":null},"PeriodicalIF":6.3,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142232425","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}

引用次数: 0

Treatment of produced water from the Permian Basin: Chemical and toxicological characterization of the effluent from a pilot-scale low-temperature distillation system 处理二叠纪盆地的采出水：试点规模低温蒸馏系统流出物的化学和毒理学特征描述

IF 6.3 2区工程技术

Journal of water process engineering Pub Date : 2024-09-14 DOI: 10.1016/j.jwpe.2024.106146

{"title":"Treatment of produced water from the Permian Basin: Chemical and toxicological characterization of the effluent from a pilot-scale low-temperature distillation system","authors":"","doi":"10.1016/j.jwpe.2024.106146","DOIUrl":"10.1016/j.jwpe.2024.106146","url":null,"abstract":"<div>Thermal distillation presents a promising solution to achieve the beneficial reuse of hypersaline-produced water (PW). This study evaluated the performance of a novel pilot-scale low-temperature thermal distillation system treating PW from the Permian Basin and studied the suitability of the effluent for surface discharge applications. The robustness of the system was evaluated by monitoring over 16 key parameters during continuous operation. Water quality was assessed using a targeted chemical scheme and whole effluent toxicity (WET) tests with model organisms from four trophic levels. The system showed a robust performance during the operation and effectively reduced salinity (>99%), major ions (95–99%), heavy metals (60–100%), ammonia (93%), and organics (43–60%) in feed PW. The WET assessment showed adverse effects on the organisms across multiple trophic levels, involving algae, invertebrates, fish, and bacteria. Comprehensive chemical characterization identified 14 constituents listed as priority pollutants in the distillate, including volatile and semi-volatile organic compounds, metals, and nitrogenous compounds. This study identified 5 constituents at potentially toxic levels for the organisms tested, providing insight into additional polishing steps that may be coupled with distillation to achieve non-toxic effluents suitable for discharge. This study serves as a critical resource for future risk-based research, informs risk assessment efforts, and guides the development of treatment strategies for the beneficial reuse of hypersaline PW.</div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":null,"pages":null},"PeriodicalIF":6.3,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142232323","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}

引用次数: 0

Fabricated pH-responsive sponge with switchable wettability for multitasking and controllable oil-water separation 制备出具有可切换润湿性的 pH 值响应海绵，可用于多种任务和可控的油水分离

IF 6.3 2区工程技术

Journal of water process engineering Pub Date : 2024-09-14 DOI: 10.1016/j.jwpe.2024.106160

{"title":"Fabricated pH-responsive sponge with switchable wettability for multitasking and controllable oil-water separation","authors":"","doi":"10.1016/j.jwpe.2024.106160","DOIUrl":"10.1016/j.jwpe.2024.106160","url":null,"abstract":"<div>pH-responsive smart materials with switchable wettability have a great potential application in bidirectional oil-water separation. In this work, a simple, low-cost and environmentally friendly strategy is developed to construct a pH-responsive melamine sponge (MS) with reversible wettability via polydopamine (PDA) modification followed by grafting long-chain alkanes with carboxyl (–COOH) and methyl (–CH3) groups. The as-modified sponge exhibits unique pH-responsiveness, that is, the water contact angle (WCA) is measured to be 144.9° under acidic and neutral environments, while the wettability is radically changed from hydrophobic to hydrophilic under alkaline conditions. Moreover, in alkaline environment, the pH-responsive sponge can rapidly release the absorbed oil, demonstrating a controllable desorption performance. Also, the prepared sponge is utilized to accomplish controllable separation of various oil/water mixtures, as well as to effectively separate oil-in-water emulsions. Furthermore, after 50 cycles, the oil-water separation efficiency was still higher than 92 %. This smart wettability sponge has an extensive application prospect in controlled oil-water separation and on-demand oil-spill remediation.</div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":null,"pages":null},"PeriodicalIF":6.3,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142228498","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}

引用次数: 0

MoS2 sponge co-catalytic Fenton reaction for efficient degradation of antibiotics: Performance, mechanism and reactor operation 用于高效降解抗生素的 MoS2 海绵协同催化芬顿反应：性能、机理和反应器操作

IF 6.3 2区工程技术

Journal of water process engineering Pub Date : 2024-09-14 DOI: 10.1016/j.jwpe.2024.106161

{"title":"MoS2 sponge co-catalytic Fenton reaction for efficient degradation of antibiotics: Performance, mechanism and reactor operation","authors":"","doi":"10.1016/j.jwpe.2024.106161","DOIUrl":"10.1016/j.jwpe.2024.106161","url":null,"abstract":"<div>Levofloxacin (LEV) residue is one of the key issues with livestock wastewater, posing a threat to aquatic ecosystems and human health. Herein, MoS2 sponge (MS) co-catalyst was synthesized using a simple impregnation method to construct a MS/Fenton system. Under suitable conditions, MS/Fenton could achieve 95.8 % LEV degradation in 30 min, with a reaction rate constant 9.75 times higher than that of Fenton. The results of the reactive oxygen species identification and material characterization indicated that the massive decomposition of H2O2 generated ROS (•OH and 1O2) and accelerated Fe2+ regeneration were the main factors for pollutant removal. MS/Fenton performed well in various aqueous matrices, reflecting excellent adaptability and anti-interference performance. MS was structurally stable with minimal Mo leaching after the reaction. Furthermore, an external circulation packed-bed reactor was designed for application feasibility verification of the system. The system demonstrated excellent removal efficiency during 20 days of continued operation (without MS regeneration). In addition, MS/Fenton demonstrated a remarkable purification effect on real livestock wastewater. This study offered new insights for the large-scale preparation of recyclable co-catalysts, and the constructed long-acting and stable MS/Fenton system and reactor provide a reference for the green and efficient treatment of practical wastewater.</div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":null,"pages":null},"PeriodicalIF":6.3,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142232424","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}

引用次数: 0

Mesh coated with microbially induced nanoscale vaterite for oil-in-water emulsion separation 涂有微生物诱导的纳米级沃特石的网（用于分离水包油型乳液

IF 6.3 2区工程技术

Journal of water process engineering Pub Date : 2024-09-14 DOI: 10.1016/j.jwpe.2024.106132

{"title":"Mesh coated with microbially induced nanoscale vaterite for oil-in-water emulsion separation","authors":"","doi":"10.1016/j.jwpe.2024.106132","DOIUrl":"10.1016/j.jwpe.2024.106132","url":null,"abstract":"<div>Microbial-induced calcium carbonate precipitation (MICP), with its hydrophilic rough microstructures and as an environmentally friendly material modification method, has shown great potential for oil-water separation. However, its efficiency in separating oil-in-water emulsions remains challenging. This study advances the MICP method by producing microbially induced nanoscale calcium carbonate on a mesh using calcium acetate instead of traditional calcium chloride, successfully achieving efficient separation of oil-in-water emulsions. The stainless-steel mesh (SSM) after calcium acetate-MICP treatment obtained nano-elliptical flake-like vaterite (vaterite-SSM) and demonstrated superior superhydrophilicity and underwater superoleophobicity compared to the mesh coated with micro-cubic structured calcite (calcite-SSM) treated by calcium chloride-MICP. Notably, vaterite-SSM achieved a flux of up to 309 L·m−2·h−1 and an oil rejection rate of over 98.7 % in gravity-driven separation of oil-in-water emulsions, demonstrating significant reusability after 6 cycles. Conversely, calcite-SSM was ineffective in emulsion separation due to coating instability and large particle spacing. Additionally, vaterite-SSM effectively separated various oil-water mixtures, maintaining high performance across 30 separation cycles. This study underscores the important use of calcium acetate in MICP to obtain nano-elliptical flake-like vaterite for efficient oil-water emulsion separation, advancing the promise of MICP as an effective and sustainable method for environmental applications.</div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":null,"pages":null},"PeriodicalIF":6.3,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142232324","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}

引用次数: 0

Water resource rejuvenation via AOP based degradation of pharmaceuticals extensively used during COVID-19 通过基于 AOP 的降解 COVID-19 期间广泛使用的药物来恢复水资源的活力

IF 6.3 2区工程技术

Journal of water process engineering Pub Date : 2024-09-14 DOI: 10.1016/j.jwpe.2024.106137

{"title":"Water resource rejuvenation via AOP based degradation of pharmaceuticals extensively used during COVID-19","authors":"","doi":"10.1016/j.jwpe.2024.106137","DOIUrl":"10.1016/j.jwpe.2024.106137","url":null,"abstract":"<div>During COVID-19 (Corona Virus Disease - 2019), pharmaceuticals such as hydroxychloroquine, remdesivir, azithromycin, dexamethasone, heparin, molnupiravir etc., have been rampantly used in the treatment drive. The pharmacokinetics data of these pharmaceuticals revealed that they are not entirely absorbed by the body and can be released in primary form into wastewater. These compounds have a very high tendency to persist, bio-accumulate, and transmit into living beings in nondegradable toxic forms. Consequently, the concentrations of these pharmaceuticals are rising swiftly in wastewater. Due to pandemic, the detected concentrations of these pharmaceuticals in aqueous medium are beyond the acceptable limits. Hence, they are emerging as the “newest concern” for water contamination. Accordingly, it demands urgent attention worldwide to develop newer and better processes for fast and efficient degradation of growing pharmaceutical contaminants (PC). Advanced oxidation processes (AOP) appear to be the supremely effective wastewater treatment technology with almost 100 % removal efficiency and greater mineralization of micropollutant compared to that with other processes. Therefore, this review attempts to elucidate the most significant information on the recent progresses associated with AOP-based degradation technologies applicable precisely for the elimination and mineralization of pharmaceuticals used during COVID-19.</div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":null,"pages":null},"PeriodicalIF":6.3,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142232861","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}

引用次数: 0

Efficient chromium remediation using eco-innovative biochar in a novel two-stage upflow fixed bed system 在新型两级上流式固定床系统中使用生态创新生物炭进行高效铬修复

IF 6.3 2区工程技术

Journal of water process engineering Pub Date : 2024-09-12 DOI: 10.1016/j.jwpe.2024.106147

{"title":"Efficient chromium remediation using eco-innovative biochar in a novel two-stage upflow fixed bed system","authors":"","doi":"10.1016/j.jwpe.2024.106147","DOIUrl":"10.1016/j.jwpe.2024.106147","url":null,"abstract":"<div>Chromium (Cr) pollution poses a significant environmental threat. This study addresses the highly toxic hexavalent form of chromium [Cr(VI)] by developing an innovative two-stage upflow fixed-bed system. The system uses nano iron sulfide-modified biochar (nFeS-BC), derived from spent substrates of Lentinus edodes, as the primary adsorbent. The study determines the removal mechanisms by nFeS-BC, including ion exchange, functional group interaction, complexation and co-precipitation. Fixed bed experimental results demonstrated a maximum adsorption capacity (qe) of 2.751 mg·g−1 for Cr(VI) with an initial concentration (C0) of 20 mg·g−1, bed height (Z) of 10 cm, flow rate (Q) of 2 mL·min−1, and at pH 2. The adsorption process closely followed the Thomas and Yoon-Nelson models, confirming a high fitting accuracy (R2 = 0.997), which underscores the predictability and stability of nFeS-BC in dynamic flow conditions. Subsequent treatment in a second fixed bed, filled with cetyltrimethyl ammonium bromide-modified biochar (CTAB-BC), reduced the total Cr concentration to 0 mg·L−1. Furthermore, nFeS-BC retained 50 % of its initial adsorption capacity after five regeneration cycles. This study highlights the potential of nFeS-BC within a novel fixed-bed design for efficient and sustainable treatment of actual wastewater.</div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":null,"pages":null},"PeriodicalIF":6.3,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142173384","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}

引用次数: 0

The effects and mechanism of organic matter degradation in river sediment driven by humic-reducing bacteria 腐殖质还原菌驱动河流沉积物有机物降解的效应和机制

IF 6.3 2区工程技术

Journal of water process engineering Pub Date : 2024-09-12 DOI: 10.1016/j.jwpe.2024.106150

{"title":"The effects and mechanism of organic matter degradation in river sediment driven by humic-reducing bacteria","authors":"","doi":"10.1016/j.jwpe.2024.106150","DOIUrl":"10.1016/j.jwpe.2024.106150","url":null,"abstract":"<div>The reduction of organic pollutants in sediments is essential for controlling the rebound of black-odor waterbodies. Humic-reducing bacteria are promising in the anaerobic remediation of river sediments. However, the material conditions and environmental factors influencing organic matter (OM) degraded by humic-reducing bacteria in river sediment remain unclear. In this study, humic-reducing bacteria agents (HRBs) were used to remediate sediments with different contamination levels. The result indicated that HRBs remove light fraction organic matter (LFOM) in sediment with a high active organic matter (ATOM) content and can remove heavy fraction organic matter (HFOM) in sediment with a high degree of humification. Correlation analysis showed that OM removal was significantly correlated with fluorescein diacetate (FDA) hydrolase activity (R = 0.89, P ≤ 0.01) and acidified volatile sulfides (AVS) content (R = 0.81, P ≤ 0.05), respectively. Combined analyses of changes in iron morphology and FDA hydrolase activity revealed that HRBs mediated the reduction process of iron minerals, leading to an increase in Fe(II) content in sediment. HFOM complexed with iron minerals was released and could be further decomposed and utilized by FDA hydrolases. In addition, the process of OM degraded by HRBs can induce the accumulation of Fe(II) and AVS. The work helps to understand the mechanism of OM degraded by HRBs in sediment and the applicable conditions for the effective removal of OM by HRBs to control the rebound of black-odor waterbodies caused by endogenous pollution.</div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":null,"pages":null},"PeriodicalIF":6.3,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142173385","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}

引用次数: 0