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New insights into different surfactants’impacts on sludge fermentation:Focusing on the particular metabolic processes and microbial genetic traits

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Frontiers of Environmental Science & Engineering 2022年第8期16卷 221-234页

作者： Jingyang Luo Shiyu Fang Wenxuan Huang Feng Wang Le Zhang Fang Fang Jiashun Cao Yang Wu Dongbo Wang Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes Ministry of EducationHohai UniversityNanjing 210098China College of Environment Hohai UniversityNanjing 210098China State Key Laboratory of Pollution Control and Resource Reuse School of Environmental Science and EngineeringTongji UniversityShanghai 200092China College of Environmental Science and Engineering Hunan UniversityChangsha 410082China

Surfactants were expected to exhibit positive effects on the waste activated sludge(WAS)***,the systematic comparison of different categories of surfactants on the WAS fermentation and the functional mechanisms,especially microbial metabolic traits,have not yet been precisely *** study revealed the positive effects of different surfactants on the volatile fatty acid(VFA)production,which followed the order of alkyl polysaccharides(APG)>sodium dodecylbenzene sulfonate(SDBS)>hexadecyl trimethyl ammonium bromide(HTAB).Mechanistic exploration found that the presence of different surfactants improved solubilization and hydrolysis steps,and then contributed to the subsequent acidification with different *** functional microorganisms associated with VFA generation were enriched in surfactant-conditioned *** analysis further indicated that the key genes involved in the particular process of VFA generation were *** simultaneous bioavailable substrate improvement,functional bacterial enrichment,and metabolic activity upregulation induced by different surfactants jointly contributed to VFA promotion during WAS *** study could provide a comprehensive realization of surfactants’impacts on theWAS fermentation process,and more importantly,it reminded the public to discern the distinct interplaying effects induced by different chemicals in regulating the WAS disposal and resource recovery.

关键词： Waste activated sludge(WAS) Volatile fatty acids(VFA) Surfactant types Functional microorganisms Metabolic activity upregulation

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Fe/Co-modified Enteromorpha bio-hydrochar enhanced anaerobic digestion of chicken manure with sulfadimethazine:focusing on synergistic mechanism and microbial community succession

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Biochar 2024年第1期6卷 1725-1741页

作者： Yutong Liu Ziyu Peng Zhengguang Hu Hanhan Xue Junpeng Qiao Qigui Niu School of Environmental Science and Engineering China-America CRC for Environment&Health of Shandong ProvinceShandong University72#Jimo BinhaiRoadQingdao 266237ShandongChina. Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse Shandong UniversityQingdao 266237ShandongChina. Shandong Key Laboratory of Environmental Processes and Health School of Environmental Science and EngineeringShandong UniversityQingdao 266237China. Qingdao Key Laboratory of Marine Pollutant Prevention Shandong UniversityQingdao 266237ShandongChina.

Residual antibiotics in chicken manure may interfere with the stability of anaerobic digestion(AD)and inhibit resource utilization *** this study,we aimed to enhance chicken manure bio-methanation in AD with highconcentration of sulfamethazine(SMZ)by adding metal(Fe,Co)-modified Enteromorpha-based hydrochar(Co-HC,Fe-HC).The results showed that Fe-HC and Co-HC increased the degree of acidogenesis by 1.25 times and 1.58 times,*** maximum protein concentration in EPS was increased by 47.64%and 72.5%after adding Fe-HC and ***,only Co-HC demonstrated notable improvements in both methane production and SMZ removal *** analysis showed that Co-HC possessed a richer variety of oxygen and nitrogen functional groups,along with superior electron exchange capabilities compared to ***,microbiological assessments revealed that Co-HC enriched syntrophic bacteria(such as Syntrophomonas and Mesotoga),facilitating direct interspecies electron transfer(DIET)and subsequently enhancing biomethane *** abundance of genes involved in electron transfer increased significantly with Co-HC,with a maximum increase of 75.86%in Co1.5-HC ***,the elimination of antibiotic resistance genes(sul1,sul2)increased by 65.66%in the Co1.5-HC *** study offers a theoretical foundation and empirical support for the synergistic improvement of livestock and poultry manure containing high antibiotic concentrations,thereby helping to overcome challenges posed by recalcitrant substances.

关键词： Chicken manure digestion Enteromorpha-based hydrochar Metal(Fe or Co)modification Synergistic mechanism Sulfonamide antibiotics

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One-step simultaneous biomass synthesis of iron nanoparticles using tea extracts for the removal of metal(loid)s in acid mine drainage

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Chemosphere 2023年第1期337卷 139366页

作者： Pan, Zibin Xie, Rongrong Chen, Zuliang Fujian Key Laboratory of Pollution Control and Resource Reuse School of Environmental and Resource Sciences Fujian Normal University Fujian Province Fuzhou350007 China

Acid Mine Drainage (AMD) contains various metal/metalloid ions such as Fe, Cu, and As, which all impact seriously on mine ecosystems. Currently, the commonly used chemical methods for treating AMD may cause secondary pollution to appear in the environment. In this study, one-step simultaneous biomass synthesis of iron nanoparticles (Fe NPs) using tea extracts for the removal of heavy metals/metalloids in AMD is proposed. Characterizations revealed that the Fe NPs presented severely agglomerated particles with an average particle size of 119.80 ± 4.94 nm, on which various AMD-derived metal(loid)s, including As, Cu, and Ni, were uniformly dispersed. The biomolecules participating in the reaction in the tea extract were identified as polyphenols, organic acids, and sugars, which acted as complexing agents, reducing agents, covering/stabilizing agents, and promoted electron transfer. Meanwhile, the best reaction conditions (reaction time = 3.0 h, volume ratio of AMD and tea extract = 1.0:1.5, concentration of extract = 60 g/L, and T = 303 K) were obtained. Finally, the simultaneous formation of Fe NPs and their removal of heavy metals/metalloids from AMD was proposed, mainly involving the formation of Fe NPs and adsorption, co-precipitation, and reduction processes of heavy metals/metalloids. © 2023 Elsevier Ltd

关键词： Heavy metals

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Transformation and drive mechanism of nitrogen functional genes at estuaries in dry and wet seasons

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Chemosphere 2024年 363卷 142938页

作者： Huang, Jian Jin, Changzhou Zhang, Hua Zhao, Bingbing Man, Yacan Zhang, Jiamei Shuai, Zichen School of Environmental and Energy Engineering Anhui Jianzhu University Hefei230601 China Anhui Provincial Key Laboratory of Environmental Pollution Control and Resource Reuse Hefei230601 China Pollution Control and Resource Utilization in Industrial Parks Joint Laboratory of Anhui Province Hefei230601 China

The nitrogen cycle plays a vital role in maintaining ecological health and biodiversity. In aquatic systems, nitrogen transformation genes significantly contribute to biological nitrogen cycling. Although the function of these genes is known to be influenced by environmental factors, there is limited research exploring the relationship between nitrogen transformation genes and environmental factors. Therefore, the correlations, between nitrogen transformation genes and environmental factors, were investigated at the estuaries of Chaohu lake (China) in different seasons. The results showed that the values of temperature, pH, organic compounds, nitrogen, and dissolved oxygen were higher in dry season, whereas the abundance of the genes was lower in dry season. In addition, the abundance of the anaerobic ammoxidation gene was much lower than the nitrification gene and denitrification gene. The results indicated that biological nitrification and denitrification were the primary mechanisms for nitrogen removal at estuaries in different seasons, and the reduction of nitric oxide may be a limiting step in the denitrification process. The Co-occurrence Network and Mantel test indicated that, during the dry season, the temperature was the primary driver of ammonification and nitrification functions, the NO3− and NO2− were the primary drivers of denitrification, and the total nitrogen (TN) and NH4+ were the main drivers of anaerobic ammonia oxidation. During the wet season, the dissolved oxygen was the primary driver of ammonification and nitrification functions, the chemical oxygen demand was the primary driver of denitrification, and the TN was the main driver of anaerobic ammonia oxidation. This study provides valuable insights into nitrogen cycling in surface water, contributing to a better understanding of this important process. © 2024 Elsevier Ltd

关键词： Genes

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N-doping offering higher photodegradation performance of dissolved black carbon for organic pollutants: experimental and theoretical studies

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2024年第4期25卷 340-356页

作者： Yong GUO Mengxia CHEN Ting CHEN Ying GUO Zixuan XU Guowei XU Soukthakhane SINSONESACK Keophoungeun KANMANY Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes Ministry of EducationCollege of EnvironmentHohai UniversityNanjing 210093China Key Laboratory of Environmental Engineering of Jiangsu Province Jiangsu Provincial Academy of Environmental ScienceNanjing 210036China State Key Laboratory of Pollution Control and Resource Reuse Nanjing UniversityNanjing 210023China Central Environmental Laboratory Natural Resources and Environment Research InstituteMinistry of Natural Resources and EnvironmentVientiane 999012Laos

We investigated the influence mechanism of N-doping for dissolved black carbon(DBC)photodegradation of organic *** degradation performance of N-doped dissolved black carbon(NDBC)for tetracycline(TC)(71%)is better than that for methylene blue(MB)(28%)under *** levels are both better than DBC degradation performances for TC(68%)and MB(18%)under *** species quenching experiments suggest that h and-O,are the main reactive species for NDBC photodegraded TC,while-OH and h*are the main reactive species for NDBC photodegraded MB.-OH is not observed during DBC photodegradation of *** is likely because N-doping increases valence-band(VB)energy from 1.55 eV in DBC to 2.04 eV in NDBC;the latter is strong enough to oxidize water to ***,N-doping increases the DBC band gap of 2.29 to 2.62 eV in NDBC,resulting in a higher separation efficiency of photo-generated electrons-holes in NDBC than in *** these factors give NDBC stronger photodegradation performance for TC and MB than ***-performance liquid chromatography-mass spectrometry(HPLC-MS)characterization and toxicity evaluation with the quantitative structure-activity relationship(QSAR)method suggest that TC photodegradation intermediates produced by NDBC have less aromatic structure and are less toxic than those produced by *** adopted a theoretical approach to clarify the relationship between the surface groups of NDBC and the photoactive species *** results add to the understanding of the photochemical behavior of NDBC.

关键词： Dissolved black carbon(DBC) N-doping Organic pollutants Band gap Photodegradation

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A Novel Self-Assembled Zif-67 Hollow Prisms For High-Efficient Simultaneous Removal Of Ciprofloxacin And Lead

SSRN

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SSRN 2023年

作者： Lin, Mei Wu, Jianwang Chen, Zuliang Fujian Province Key Laboratory of Pollution Control and Resource Reuse School of Environmental and Resource Sciences Fujian Normal University Fujian Province Fuzhou350007 China

Due to the wide variety of pollutants in wastewater, therefore, how to efficiently and effectively remove mixed pollutants is of great importance for environmental remediation. In this study, ZIF-67 hollow prisms self-assembled by nanoparticles were prepared. The nanoparticles possess a regular distributed pore structure, which mixed with the self-assembled hierarchical structure can provide more binding sites. This special self-assembly structure endows ZIF-67 hollow prisms to have a large specific surface area (1221 m2 g−1), and to exhibit excellent efficiency in removing a variety of pharmaceuticals. For simultaneous removal of ciprofloxacin and Pb(II) mixed pollutants, the adsorption process of Pb(II) is ultra-fast ( © 2023, The Authors. All rights reserved.

关键词： Adsorption

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Microbial Synthesized Iron Nanoparticles after Recovering Rare Earth Elements Used for Removing Arsenic in Mine Groundwater

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SSRN 2023年

作者： Yan, Qiuting Zhang, Zhenjun Chen, Zuliang Fujian Key Laboratory of Pollution Control and Resource Reuse School of Environmental and Resource Sciences Fujian Normal University Fujian Province Fuzhou350007 China

Recycling rare earth elements (REEs) from secondary sources such as mine wastewater has emerged as a sustainable economic strategy. In this study, microbial synthesized iron nanoparticles after the recovery of rare earth elements (FeNPs/REEs) have been used as an environmentally friendly material to remove arsenic from mine groundwater. The removal efficiencies of As(III) and As(V) were 94.5% and 96.0%, respectively, compared to that of As(III) (44.5%) and As(V) (66.5%) by only FeNPs, indicating the removal efficiency of FeNPs/REEs was better than those of FeNPs. IC-AFS and XPS analysis showed that As(III) was partially oxidized to As(V) during the adsorption process via electron transfer. Electrochemical and BET indicated that FeNPs/REEs not only helped to expose more active sites but also the catalytic activity was enhanced. Meanwhile SEM and FTIR demonstrated that arsenic was adsorbed on the surface of FeNPs/REEs through complexation and ion exchange. Furthermore, zeta potential analysis showed electrostatic interactions between arsenic and FeNPs/REEs at pH=6. Thus, the key physicochemical properties for the removal of As(III) and As(V) by FeNPs/REEs were statistically analyzed via Pearson correlation analysis to understand the removal mechanism of arsenic involving surface complexation, oxidation, electrostatic and ion exchange. Finally, there was a consistently high efficiency in removing arsenic from mine groundwater using FeNPs/REEs with As (73.0%), Pb (76.0%) and Fe (36.0%). This study generates a new insight into FeNPs/REEs used in groundwater remediation. © 2023, The Authors. All rights reserved.

关键词： Groundwater

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Adsorption Performance and Mechanism of Nano Hfo/Pumice Composites for Phosphate in Water

SSRN

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SSRN 2024年

作者： Huang, Jian Qiu, Xianjin Zhang, Hua Zhang, Chenxi Lu, Zhuoyi Luo, Tao He, Chunhua Zhang, Jiamei Shuai, Zichen Pollution Control and Resource Utilization in Industrial Parks Joint Laboratory of Anhui Province Hefei230601 China School of Environmental and Energy Engineering Anhui Jianzhu University Hefei230601 China Anhui Provincial Key Laboratory of Environmental Pollution Control and Resource Reuse Hefei230601 China

Excessive phosphorus is a principal cause of water eutrophication. Adsorption is an effective method for phosphorus removal. Yet there is little research on the adsorption performance and mechanism of phosphorus with nano HFO/pumice composites. In this study, the nano HFO/pumice composites were prepared, and the adsorption performance and mechanism of nano HFO/pumice composites for phosphorus were researched. The results indicated that the phosphorus adsorption performance reached a maximum value of 5.69 mg·g-1 when the pH was 7. The adsorption performance increased with temperature. Moreover, when Cl- and SO42- coexisted, SO42- had a greater effect on the adsorption performance of the nano HFO/pumice composites for phosphorus, and the adsorption performance decreased gradually with the increase of SO42- concentration. According to the adsorption isotherm, the adsorption performance increased to 6.81 mg·g-1. The adsorption isotherms indicated that the Langmuir isotherm model was more suitable to describe the adsorption behavior of the nano HFO/pumice composites for phosphorus, and the correlation coefficient was 0.9785. In addition, the pseudo-second kinetic was more consistent with the adsorption mechanism of nano HFO/pumice composites for phosphorus. The internal diffusion model showed that the combination of external mass transfer and internal diffusion controlled the adsorption rate of the nano HFO/pumice composites for phosphorus. The experimental results showed that the adsorption mechanisms of nano HFO/pumice composites for phosphorus mainly involved pore filling, electrostatic interaction, and surface complexation. © 2024, The Authors. All rights reserved.

关键词： Eutrophication

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The Impact of Hydraulic Hubs on the Spatial Variation of Water Quality in the Middle Reaches of the Hanjiang River and an Analysis of the Driving Factors 8th

The Impact of Hydraulic Hubs on the Spatial Variation of Wat...

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8th International Conference on Water resource and Environment, WRE 2022

作者： Jia, Di Lin, Li Pan, Xiong Dong, Lei Zhang, Sheng Basin Water Environmental Research Department Changjiang River Scientific Research Institute Wuhan430010 China Key Lab of Basin Water Resource and Eco-Environmental Science in Hubei Province Wuhan430010 China State Key Laboratory of Pollution Control and Resources Reuse School of Environment Nanjing University Nanjing210023 China

ISBN: (纸本)9789819919185

The Hanjiang River occupies a very important position in China's water resource allocation and is a typical dam-influenced river in China. To monitor the water quality and heavy metal content of the river, and to investigate the influence of water hubs on the changes of both, sampling sites were set up in October 2020 upstream, before, and below the dams of three typical water hubs in the middle reaches of the Hanjiang River for analysis and investigation. The results showed that the concentrations of TP, TN, NH4-N, and Fe exceeded the standard;the concentrations of conventional water quality indicators changed significantly (P 0.05). © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Water quality

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Localized heating coupling with radical oxidation eliminating antibiotic resistance genes (ARGs) in interfacial photothermal Fenton-like disinfection process

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Science of the Total Environment 2024年 955卷 176779页

作者： Hou, Haozheng Zou, Dingli Shi, Weiye Wang, Yingying Ma, Defang Wang, Yan Li, Qian Gao, Yue Gao, Baoyu Shandong Key Laboratory of Water Pollution Control and Resource Reuse School of Environmental Science and Engineering Shandong University Qingdao266237 China No.1 Institute of Geology and Mineral Resources of Shandong Province Jinan250014 China

Conventional oxidative disinfection processes are inefficient in eliminating intracellular antibiotic resistance genes (iARGs) due to the barrier of the cell membrane and the competitive reaction of cellular constituents within antibiotic-resistant bacteria (ARB), resulting in the widespread prevalence of ARGs in recycled water. This study presented the first application of localized heating coupling with advanced oxidation to destroy the resistant Escherichia coli cells and improved subsequent iARGs (blaTEM-1) degradation in a novel photothermal Fenton-like disinfection process. The Fe-Mn@CNT microfiltration membrane, comprising carbon nanotubes wrapped with Fe and Mn nanoparticles (Fe-Mn@CNT), was employed as a nanomaterial for photothermal conversion and H2O2 activation. The highly efficient absorption of full-spectrum photons by CNTs enabled the Fe-Mn@CNT membrane to concentrate light to generate localized intense heat, resulting in the destruction of ARB nearby, and the subsequent release of iARGs. Interfacial heat favored Fe-Mn-induced H2O2 activation, leading to the production of more ·OH, which in turn promoted the oxidation for ARG degradation and ARB cell damage. The results of the acetylcysteine quenching experiments indicated that interfacial heating and radical oxidation-induced accumulation of intracellular reactive oxygen species contributed to the elimination of about 1-log iARGs through direct attack. The integrity of the cell membrane, the morphology of ARB and the variation of i/e ARG copy numbers were observed to reveal that the introduction of interfacial heating aggravated the cell lysis and accelerated the iARGs release, resulting in the inactivation of 7.27-log ARB and the elimination of 4.64-log iARGs and 2.23-log eARGs. Localized heating coupling with ·OH oxidation achieved a 143 % increase in iARGs removal compared to the conventional Fenton-like oxidation. The interfacial photothermal Fenton-like disinfection process exhibited remarkable

关键词： Escherichia coli

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