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New insights into autochthonous fungal bioaugmentation mechanisms for recalcitrant petroleum hydrocarbon components using stable isotope probing

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Science of the Total environment 2025年 958卷 178082页

作者： Huang, Qihui Dai, Yeliang Yang, Guiqin Zhuang, Li Luo, Chunling Li, Jibing Zhang, Gan Guangdong Key Laboratory of Environmental Pollution and Health College of Environment and Climate Jinan University Guangzhou511443 China State Key Laboratory of Organic Geochemistry and Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou510640 China University of Chinese Academy of Sciences Beijing100039 China Ningbo Research Institute of Ecological and Environmental Sciences Ningbo315000 China

Autochthonous fungal bioaugmentation (AFB) is a promising strategy for the microbial remediation of petroleum hydrocarbon (PH)-contaminated soils. However, the mechanisms underlying AFB, particularly for degrading recalcitrant PH components, are not fully understood. This study employed stable isotope probing (SIP) and high-throughput sequencing to investigate the AFB mechanisms of two hydrocarbon-degrading fungi, Fusarium solani LJD-11 and Aspergillus fumigatus LJD-29, focusing on three challenging PH components: n-Hexadecane (n-Hex), Benzo[a]pyrene (BaP), and Dibenzothiophene (DBT). Our findings indicate that both fungal strains significantly enhanced pollutant removal rates, with combined application yielding optimal results. AFB treatment reduced the microbial diversity index and altered the soil microbial community, especially affecting fungal populations. A significant correlation between the microbial diversity index and degradation efficiency suggests that greater diversity enhances pollutant removal. SIP analysis showed that LJD-11 and LJD-29 could directly assimilate n-Hex and DBT, but not BaP. Correlation analyses between functional microorganisms and other biological indicators suggest that the removal of pollutants is also attributable to indigenous functional bacteria. Additionally, non-inoculated functional fungi present in the soil play a crucial role in BaP degradation. These findings reveal distinct degradation pathways for the three pollutants. The addition of carrier substrate reduced the complexity of the network, while AFB treatment restored it. In addition, the combined fungal treatment resulted in higher network parameters, leading to a more complex and stable network structure. These results provide insights into the mechanisms of AFB for degrading recalcitrant PH components, underscoring its potential for in situ bioremediation of petroleum-contaminated soils. © 2024 Elsevier B.V.

关键词： Soil pollution

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U-shaped microRNA expression pattern could be a new concept biomarker for environmental estrogen

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Frontiers of environmental Science & Engineering 2016年第6期10卷 93-101页

作者： Rui Duan Yun Lu Lingyan Hou Lina Du Lequn Sun Xingfan Tang State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing 100084 China

Many studies have focused on environmental estrogen-related diseases. However, no consistent gene markers or signatures for estrogenicity have been discovered in mammals. This study investigated the estrogenic effects of 17β-estradiol on the prostate in immature male mice. Consistent U-shaped responses were seen in bodyweight, ventral prostate epithelial morphology, and miRNA expression levels. Specifically, most estmdiol regulated miRNAs were downregulated at low doses of estradiol （0.2 and 2 μg. kg-1）, and whose expression returned to the control level at a larger dose （200 μg-kg-1）. The *** of these regulated miRNAs is related to the prostate cancer and PI3K-Akt signaling pathways, which is consistent with the function of estmdiol. Furthermore, the miRNA-processing machinery, Drosha, in the prostate was also regulated in a similar pattern, which could be a part of the U-shaped miRNA expression mechanism. All of these data indicate that the prostate is a reliable organ for evaluating estrogenic activity and that the typical nonmonotonic dose-response relationship could be used as a novel biomarker for estrogenicity.

关键词： miRNA Prostate Estradiol Nonmonotonic dose-response Estrogenicity Drosha

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A Novel Electrochemical Reactor for Nitrogen and Phosphorus Recovery from Domestic Wastewater

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Frontiers of environmental Science & Engineering 2017年第4期11卷 139-144页

作者： Shiting Ren Mengchen Li Jianyu Sun Yanhong Bian Kuichang Zuo Xiaoyuan Zhang Peng Liang Xia Huang State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing 100084 China

To separate and concentrate NH4＋ and PO43 from the synthetic wastewater to the concentrated solution through a novel electrochemical reactor with circulated anode and cathode using the difference of the concentration between electrode chamber and middle *** recent years, the research on electrochemical processes have been focused on phosphate and ammonium removal and recovery. Among the wide range of possibilities with regards to electrochemical processes, capacitive deionization （CDI） saves the most energy while at the same time does not have continuity and selectivity. In this study, a new electrochemical reactor with electrolyte cyclic flowing in the electrode chambers was constructed to separate and concentrate phosphate and ammonium continuously and selectively from wastewater, based on the principle of CDI. At the concentration ratio of NaCI solution between the electrode chambers and the middle chamber （r） of 25 to 1, phosphate and ammonium in concentration level of domestic wastewater can be removed and recovered continuously and selectively as struvite. Long-term operation also indicated the ability to continuously repeat the reaction and verified sustained stability. Further, the selective recovery at the certain r could also be available to similar technologies for recovering other kinds of substances.

关键词： Nutrients recovery Electrochemical reactor Electrolyte cyclic flowing Concentration ratio Struvite

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An Integrated Analysis on the Synergistic Reduction of Carbon and pollution Emissions from China’s Iron and Steel Industry

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Engineering 2024年第9期40卷 111-121页

作者： Quanyin Tan Fei Liu Jinhui Li State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China

Decarbonization and decontamination of the iron and steel industry(ISI),which contributes up to 15%to anthropogenic CO_(2) emissions(or carbon emissions)and significant proportions of air and water pollutant emissions in China,are challenged by the huge demand for *** and pollutants often share common emission sources,indicating that emission reduction could be achieved ***,we explored the inherent potential of measures to adjust feedstock composition and technological structure and to control the size of the ISI to achieve carbon emission reduction(CER)and pollution emission reduction(PER).We investigated five typical pollutants in this study,namely,petroleum hydrocarbon pollutants and chemical oxygen demand in wastewater,particulate matter,SO_(2),and NO_(x) in off gases,and examined synergies between CER and PER by employing cross elasticity for the period between 2022 and *** results suggest that a reduction of 8.7%-11.7%in carbon emissions and 20%-31%in pollution emissions(except for particulate matter emissions)could be achieved by 2025 under a high steel scrap ratio(SSR)***,the SSR and electric arc furnace(EAF)ratio serve critical roles in enhancing synergies between CER and PER(which vary with the type of pollutant).However,subject to a limited volume of steel scrap,a focused increase in the EAF ratio with neglection of the available supply of steel scrap to EAF facilities would lead to an increase carbon and pollution *** CER can be achieved through SSR and EAF ratio optimization,only when the crude steel production growth rate remains below 2.2%can these optimization measures maintain the emissions in 2030 at a similar level to that in ***,the synergistic effects between PER and CER should be considered when formulating a development route for the ISI in the future.

关键词： Iron and steel industry Carbon and pollution emissions Synergistic reduction Technological structure Steel scrap Cross-elasticity

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Evaluation of bacterial pathogen diversity,abundance and health risks in urban recreational water by amplicon next-generation sequencing and quantitative PCR

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Journal of environmental Sciences 2017年第7期29卷 137-149页

作者： Qijia Cui Tingting Fang Yong Huang Peiyan Dong Hui Wang State Key Joint Laboratory on Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China

The microbial quality of urban recreational water is of great concern to public *** monitoring of indicator organisms and several pathogens alone is not sufficient to accurately and comprehensively identify microbial *** assess the levels of bacterial pathogens and health risks in urban recreational water,we analyzed pathogen diversity and quantified four pathogens in 46 water samples collected from waterbodies in Beijing Olympic Forest Park in one *** pathogen diversity revealed by 16 S r RNA gene targeted next-generation sequencing（NGS） showed that 16 of 40 genera and 13 of 76 reference species were *** most abundant species were Acinetobacter johnsonii,Mycobacterium avium and Aeromonas *** polymerase chain reaction（q PCR） of Escherichia coli（uid A）,Aeromonas（aer A）,***（16S r RNA）,Pseudomonas aeruginosa（oaa） and Salmonella（inv A） showed that the aer A genes were the most abundant,occurring in all samples with concentrations of 10^（4–6） genome copies/100 m L,followed by oaa,inv A and *** total,34.8% of the samples harbored all genes,indicating the prevalence of these pathogens in this recreational *** on the q PCR results,a quantitative microbial risk assessment（QMRA） showed that the annual infection risks of Salmonella,*** and *** in five activities were mostly greater than the *** risk limit for recreational contacts,and children playing with water may be exposed to the greatest infection *** findings provide a comprehensive understanding of bacterial pathogen diversity and pathogen abundance in urban recreational water by applying both NGS and q PCR.

关键词： Human pathogens Urban water Recreational activities 16S rRNA gene targeted NGS qPCR Quantitative microbial risk assessment

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Characterization of a phenanthrene-degrading methanogenic community

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Frontiers of environmental Science & Engineering 2018年第5期12卷 146-154页

作者： Quanhui Ye Chengyue Liang Chongyang Wang Yun Wang Hui Wang State Key Joint Laboratory on Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China

Polycyclic aromatic hydrocarbons(PAHs)often occur in oil-contaminated soil,coke wastewater and domestic sludge;however,associated PAH degraders in these environments are not *** we evaluated phenanthrene degradation potential in the mixed samples of above environments,and obtained a methanogenic community with different microbial profile compared to those from *** was efficiently degraded(1.26 mg/L/d)and nonstoichiometric amount of methane was produced simultaneously.16S rRNA gene sequencing demonstrated that bacterial populations were mainly associated with Comamonadaceae Nocardiaceae and Thermodesulfobiaceae,and that methanogenic archaea groups were dominated by Methanobacterium and *** such as hexane,hexadecane,benzene and glucose showed the most positive effects on phenanthrene *** utilization tests indicated that this culture could not utilize other *** analyses could offer us some suggestions on the putative phenanthrene-degrading microbes in such environments,and might help us develop strategies for the removal of PAHs from contaminated soil and sludge.

关键词： Phenanthrene degradation potential Methanogenic Bacterial population Archaeal group

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Catalytic ozonation in advanced treatment of kitchen wastewater:multi-scale simulation and pilot-scale study

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Frontiers of environmental Science & Engineering 2023年第12期17卷 47-58页

作者： Zuoyong Zhou Ni Yan Mengxi Yin Tengfei Ren Shuning Chen Kechao Lu Xiaoxin Cao Xia Huang Xiaoyuan Zhang State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China

Catalytic ozonation is regarded as a promising technology in the advanced treatment of refractory organic ***-bed reactors are widely used in practical applications due to simple structures,installation and ***,mass transfer of packed-bed reactors is relatively restrained and amplified deviations usually occurred in scale-up ***,a multi-scale packed-bed model of catalytic ozonation was established to guide pilot ***,a laboratory-scale test was conducted to obtain kinetic parameters needed for ***,a multi-scale packed-bed model was developed to research the effects of water distribution structure,catalyst particle size,and hydraulic retention time(HRT)on catalytic *** was found that the performance of packed bed reactor was increased with evenly distributed water inlet,HRT of 60 min,and catalyst diameter of about 3-7 ***,an optimized reactor was manufactured and a pilot-scale test was conducted to treat kitchen wastewater using catalytic ozonation *** the pilot-scale test with an ozone dosage of 50 mg/L and HRT of 60 min,the packed-bed reactor filled with catalysts I was able to reduce chemical oxygen demand(COD)from 117 to 59 mg/*** performance of the catalytic ozonation process in the packed-bed reactor for the advanced treatment of actual kitchen wastewater was investigated via both multi-scale simulation and pilot-scale tests in this study,which provided a practical method for optimizing the reactors of treating refractory organic wastewater.

关键词： Catalytic ozonation Multi-scale simulation Pilot-scale study Kitchen wastewater

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Aerobic granular sludge formation based on substrate availability:Effects of flow pattern and fermentation pretreatment

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Frontiers of environmental Science & Engineering 2020年第3期14卷 155-164页

作者： Quan Yuan Hui Gong Hao Xi Kaijun Wang State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China

The influences of flow patterns(mixed-flow and plug-flow)and fermentation pretreatment on aerobic granular sludge(AGS)formation with various substrate availability levels were investigated by running four identical laboratory-scale sequencing batch reactors(R1-R4),comparing two anaerobic feeding strategies and three kinds of substrates.R1 achieved faster granulation with a fast influent fill step followed by a modified anaerobic mixed-flow phase,but the AGS showed poorer stability with a cracked structure and a high suspended solids concentration in the *** anaerobic plug-flow feeding mode(with influent fed slowly from the bottom)in R2 provided deeper penetration depth for the substance to reach the core of A G S and accordingly strengthen A G S *** acidogenic upflow sludge bed reactor was introduced as a pretreatment to improve the AGS performance by enhancing glucose pre-fermentation(R4).AGS fed with mixed volatile fatty acids(VFA)after glucose fermentation showed similar performance compared with the reactor fed with acetate in the aspects of stability,structure,size distribution and nitrogen removal efficiency,and 74%similarity in the microbial *** actual wastewater with low VFA concentrations,fermentation treatment was suggested as a promising pretreatment for stable AGS granulation and operation.

关键词： Anaerobic plug-flow feeding mode Anaerobic mixed-flow mode Fermentation pretreatment Substrate gradient Penetration depth

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One-step ball milling-prepared nano Fe2O3 and nitrogendoped graphene with high oxygen reduction activity and its application in microbial fuel cells

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Frontiers of environmental Science & Engineering 2020年第2期14卷 185-195页

作者： Xingguo Guo Qiuying Wang Ting Xu Kajia Wei Mengxi Yin Peng Liang Xia Huang Xiaoyuan Zhang State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China

Developing high activity,low-cost and long durability catalysts for oxygen reduction reaction is of great significance for the practical application of microbial fuel *** ftill exposure of active sites in catalysts can enhance catalytic activity ***,novel Fe-N-doped graphene is successftilly synthesized via a one-step in situ ball milling *** graphite,ball milling graphene,N-doped graphene and Fe-N-doped graphene are applied in air cathodes,and enhanced performance is observed in microbial fuel cells with graphene-based ***,Fe-Ndoped graphene achieves the highest oxygen reduction reaction activity,with a maximum power density of 1380±20 mW/m^2 in microbial fUel cells and a current density of 23.8 A/m^2 at-0.16 V in electrochemical tests,which are comparable to commercial Pt and 390%and 640%of those of pristine *** investigation of the material characteristics reveals that the superior performance of Fe-Ndoped graphene results from the full exposure of Fe2O3 nanoparticles,pyrrolic N,pyridinic N and excellent Fe-N-G active sites on the graphene *** work not only suggests the strategy of maximally exposing active sites to optimize the potential of catalysts but also provides promising catalysts for the use of microbial fuel cells in sustainable energy generation.

关键词： Microbial fuel cells Air cathodes Nano Fe2O3 and nitrogen-doped graphene Oxygen reduction reaction

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Investigation of polyhydroxyalkanoates （PHAs） biosynthesis from mixed culture enriched by valerate-dominant hydrolysate

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Frontiers of environmental Science & Engineering 2017年第1期11卷 67-77页

作者： Jiuxiao Hao Xiujin Wang Hui Wang State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing 100084 China

The production of polyhydroxyalkanoates （PHAs） with a high fraction of 3-hydroxyvalerate （3HV） and 3-hydroxy-2-methylvalerate （3H2/MV） from mixed culture enriched by valerate-dominant hydrolysate was evaluated in this study. After long-term enrichment, the culture showed strong ability to synthesize 3HV and 3H2MV, even with acetate-dominant substrate. The ultilization of single or mixed iso-/n-valerate by the enriched culture showed that the mixture of iso-valerate and n-valerate was more efficient substrate than any single in tenaas of balancing microbial growth and PHAs synthesis. Besides, through comparing the kinetics and stoichiometry of the tests supplying valerate and propionate, the enriched culture with equivalent valerate and propionate （1 ： 1 molar ratio） exhibited superior PHAs production performances to pure valerate or propionate, attaining more than 70 tool% of 3HVand 3H2MV. The above findings reveal that valerate-dominant hydrolysate is a kind of suitable substrate to enrich PHAs producing culture with great capability to synthesize 3HV and 3H2MV monomers, thus improving product properties than pure poly（3-hydroxybutyrate）（P3HB）; also 3HV and 3H2MV production behaviors can be regulated by the type of odd-carbon VFAs in the substrate.

关键词： Polyhydroxyalkanoates (PHAs) Valerate Mixed culture 3-hydroxyvalerate (3HV) Propionate

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