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Journal of Ocean University of China 2024年第2期23卷 447-454页

作者： zhao Xuning ZHANG Zhiming zhao yangguo MUPINDU Progress Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering(MEGE) College of Environmental Science and EngineeringOcean University of ChinaQingdao 266100China Key Laboratory of Marine Environmental Science and Ecology(Ocean University of China) Ministry of EducationQingdao 266100China

The production of toxic sulfides is a common environmental problem in ***,the effective inhibition of sulfidogens is the key to prevent sulfides *** this study,the possibility and mechanism of nitrate(NO_(3)^(−))inhibiting the activity of the sulfate-reducing microbiota(SRM)from mariculture sediments was *** results showed that 1,3,and 5 mmol L^(−1)NO_(3)^(−)continuously inhibited sulfide production for 1-3 *** NO_(3)^(−) dosage increased to 7 mmol L^(−1),the duration of inhibition increased to 6 *** product NO_(2)^(−)heavily inhibited the activity of dissimilar sulfate reductase gene(dsrB)by 3 orders,which was the main reason that the sulfate-reducing activity was *** SRM structure changed significantly with the dosage of NO_(3)^(−),while the abundance of sulfidogens Desulfovibrio species increased due to their capability of detoxifying nitrite through nitrite ***,sulfidogens Desulfovibrio species are more adaptable to a high nitrate/nitrite environment,and the traditional control strategies by dosing nitrate/nitrite should be paid more attention *** findings will serve as helpful guidelines for sulfate-reducing microbiota in the habitat of mariculture to reduce their generation of poisonous sulfide.

关键词： sulfate-reducing microbiota sulfide nitrate Desulfovibrio mariculture

Removal of Sulfamethazine by Corn Biochars from Aqueous Solution:Sorption Mechanisms and Efficiency

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Journal of Ocean University of China 2021年第3期20卷 590-598页

作者： ZHANG Mo zhao yangguo WANG Jinpeng BAI Jie Li Kuiran College of Environmental Science and Engineering Ocean University of ChinaQingdao 266100China Key Laboratory of Marine Environment and Ecology(Ocean University of China) Ministry of EducationQingdao 266100China College of Marine Life Sciences Ocean University of ChinaQingdao 266003China The People’s Government of Laiwu District Jinan 271100China

Sorption mechanisms of sulfamethazine(SMT)in different pH solutions are *** has not been sufficiently investigated to enhance removal of SMT from alkalescent aqueous *** this study,sorption isotherms and kinetics of SMT by corn biochars pyrolyzed at 300℃ and 600℃(300C,600C)under diverse pH conditions were *** order to improve the sorption efficiency of SMT from alkalescent aqueous solution,the biochar 300C was modified by acid or *** mathematic models were used to describe sorption driving force and sorption *** showed that the biochar 300C possessed more amorphous organic carbon and polar functional groups,which led to a higher sorption capacity than biochar *** sorption rate of biochar 300C was greater than 600C under diverse pH as the physisorption of 300C outweighed *** SMT presented stronger hydrophobicity at pH 5 and higher electrostatic repulsion at pH 1 or 8,which resulted in a higher combining capacity of SMT with both biochars at pH 5 than other pH *** addition,the acid modified biochar had better removal effect on SMT than alkali at pH solution around *** research provides a theoretical basis for the removal of SMT from alkalescent aqueous solution.

关键词： sulfamethazine sorption mechanisms process modification

Enhanced Biodegradation of High-Salinity and Low- Temperature Crude-Oil Wastewater by Immobilized Crude-Oil Biodegrading Microbiota

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Journal of Ocean University of China 2022年第1期21卷 141-151页

作者： HUANG Xiao ZHOU Ting CHEN Xi BAI Jie zhao yangguo Collaborative Innovation Center of Atmospheric Environment and Equipment Technology Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution ControlSchool of Environmental Science and EngineeringNanjing University of Information Science and TechnologyNanjing 210044China The Key Laboratory of Marine Environmental Science and Ecology Ministry of EducationOcean University of ChinaQingdao 266100China Harbin Institute of Technology(Shenzhen) Shenzhen Key Laboratory of Water Resource Utilization and Environmental Pollution ControlShenzhen 518055China

High salt and low temperature are the bottlenecks for the remove of oil contaminants by enriched crude-oil degrading microbiota in Liaohe Estuarine Wetland(LEW),*** improve the performance of crude-oil removal,microbiota was further immobilized by two methods,i.e.,sodium alginate(SA),and polyvinyl alcohol and sodium alginate(PVA+SA).Results showed that the crude oil was effectively removed by the enrichment with an average degrading ratio of 19.42-31.45 mg(L d)^(−1).The optimal inoculum size for the n-alkanes removal was 10%and 99.89%.Some members of genera Acinetobacter,Actinophytocola,Aquabac-terium,Dysgonomonas,Frigidibacter,Sphingobium,Serpens,and Pseudomonas dominated in crude-oil degrading *** the removal efficiency was lower than free bacteria when the temperature was 15℃,SA and PVA+SA immobilization im-proved the resistance to *** composite crude-oil degrading microbiota in this study demonstrated a perspective potential for crude oil removal from surface water under high salinity and low temperature conditions.

关键词： crude-oil degrading microbiota microbial community immobilization high salinity low temperature

Microbial community structure in different wastewater treatment processes characterized by single-strand conformation polymorphism (SSCP) technique

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Frontiers of Environmental Science & Engineering 2008年第1期2卷 116-121页

作者： yangguo zhao Aijie WANG Nanqi REN Yan zhao School of Municipal and Environmental Engineering Harbin Institute of TechnologyHarbin 150090China College of Environmental Science and Engineering Ocean University of ChinaQingdao 266100China

In order to investigate microbial community structures in different wastewater treatment processes and understand the relationship between the structures and the status of processes,the microbial community diversity,variety and distribution in five wastewater treatment pro cesses were studied by a culture-independent genetic fingerprinting technique single-strand conformation poly-morphism(SSCP).The five processes included denitrifying and phosphate-removal system(diminished N),Chinese traditional medicine wastewater treatment system(P),beer wastewater treatment system(W),fermentative biohydrogen-producing system(H),and sulfate-reduction system(S).The results indicated that the microbial community profiles in the wastewater bioreactors with the uniform status were very *** diversity of microbial populations was correlated with the complexity of organic contaminants in *** traditional medicine wastewater contained more complex organic components;hence,the population diversity was higher than that of simple nutrient bioreactors fed with molasses *** with the strain bands in a simulated community,the relative proportion of some functional microbial populations in bioreactors was not *** biohydrogen producer Ethanoligenens harbinense in the better condition bioreactor had only a 5% band density,and the Desulfovibrio *** the sulfate-reducing bioreactor had less than 1.5%band *** SSCP profiles could identify the difference in microbial community structures in wastewater treatment processes,monitor some of the functional microbes in these processes,and consequently provide useful guidance for improving their efficiency.

关键词： wastewater treatment process microbial community structure community diversity single-strand conformation polymorphism(SSCP)

Preparation of Clay/Biochar Composite Adsorption Particle and Performance for Ammonia Nitrogen Removal from Aqueous Solution

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Journal of Ocean University of China 2020年第3期19卷 729-739页

作者： HUANG Xiao BAI Jie LI Kuiran zhao yangguo TIAN Weijun HU Chunhui College of Environmental Science and Engineering Ocean University of ChinaQingdao 266100China College of Marine Life Science Ocean University of ChinaQingdao 266003China Nanjing University of Information Science and Technology Collaborative Innovation Center of Atmospheric Environment and Equipment TechnologyJiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution ControlNanjing 210044China

This study aimed to present a novel clay/biochar composite adsorption particle, which made from abandoned reed straw and clay to remove ammonia nitrogen(NH4^+-N) from micro-contaminated water. The removal performance of NH4^+-N by composite adsorption particle was monitored under different raw material proportions and initial NH4^+-N concentration. Besides, adsorption kinetics and adsorption isotherms were investigated to reveal the adsorption mechanisms. The results showed that NH4^+-N was effectively removed under optimal proportion of biochar, foaming agent and crosslinker with 20%, 3%, and 3%, respectively. The optimal contact time was 150 min and the best removal efficiency was 88.6% at initial NH4^+-N concentration of 20 mg L^-1. The adsorption performance was well described by the second order kinetic model and Freundlich model. The novel clay/biochar composite adsorption particle in this study demonstrated a high potential for NH4^+-N removal from surface water.

关键词： clay biochar composite adsorption particle ammonia nitrogen removal adsorption mechanism

Response of Heterotrophic Bacteria Abundance and Community Structure to Asian Dust Addition in the Oligotrophic Northwest Pacific Ocean

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Journal of Ocean University of China 2020年第3期19卷 722-728页

作者： CHEN Xi ZHANG Xiaohao zhao yangguo LIU Guangxing ZHANG Chao GAO Huiwang College of Environmental Science and Engineering Ocean University of ChinaQingdao 266100China Beijing Sound Environmental Engineering Co.Ltd. Beijing 101102China Key Lab of Marine Environmental Science and Ecology Ministry of EducationOcean University of ChinaQingdao 266100China

The dust storms from the continent usually affect the abundance and diversity of planktons by supplying trace elements. As such, the response of heterotrophic planktonic bacteria to dusts, nutrients(i.e., nitrogen and phosphorus) or ferrous dosages was investigated in the Kuroshio Extension region of the Northwest Pacific Ocean(NWPO) through on-board incubation experiments during an oceanographic survey in spring 2014. The flow cytometry and 16S rRNA high-throughput sequencing methods were applied to explore the abundance and community structure of bacteria, and the percentage of high nucleic acid bacteria(HNA%). The results showed that the heterotrophic bacteria abundance was low(average 2.55×10^5 cells mL^-1) and subjected to both nitrogen(N) and ferrous(Fe) limitation. Sand-dust deposition observably promoted the activity of heterotrophic planktonic bacteria. The maximum abundance of heterotrophic bacteria was 6.98×10^5 cells mL^-1 in the dust-dosage group, which was 44% higher than the control(P < 0.05). The HNA% in the dust-dosage group was 1.37 times higher than the control(P < 0.05). The activation mechanism was mainly related to the dissolution of N and Fe in the dusts. The relative abundance of genus Winogradskyella was significantly increased by dust deposition while the relative abundance of the genera Tenacibaculum and Hyphomonas was decreased. These variations of bacterial community structure were ascribed to the dissolution of nutrients N and P. Comparing the results of different experimental groups, this study concluded that dust storm improved the abundance of heterotrophic bacteria by dissolution of N and Fe.

关键词： Northwest Pacific Asian dust heterotrophic bacteria 16S rRNA high-throughput sequencing bacteria abundance and community structure

Effect of C/N Ratio on Nitrogen Removal of A/O-MBBR Process for Treating Mariculture Wastewater

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Journal of Ocean University of China 2021年第4期20卷 879-885页

作者： CHEN Xi XIANG Zhuangzhuang HUANG Xiao RONG Huimin BAI Jie zhao yangguo College of Marine Life Science Ocean University of ChinaQingdao 266003China College of Environmental Science and Engineering Ocean University of ChinaQingdao 266100China Nanjing University of Information Science and Technology Collaborative Innovation Center of Atmospheric Environment and Equipment TechnologyJiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution ControlNanjing 210044China Key Laboratory of Marine Environment and Ecology(Ocean University of China)Ministry of Education Qingdao 266100China

In order to explore the effect of carbon and nitrogen(C/N)ratio on the performance of anoxic/aerobic-moving bed bio-film reactor(A/O-MBBR)process for treating mariculture wastewater,a laboratory-scale A/O-MBBR was *** results showed that the reduction of C/N ratio was conducive to improving the removal efficiency of chemical oxygen demand(COD)and ammonia nitrogen(NH_(4)^(+)-N),while inhibiting that of nitrite nitrogen(NO_(2)^(−)-N)and nitrate nitrogen(NO_(3)^(−)-N).The extracellular polymeric substances(EPS)in anoxic zone were significantly higher in concentration than that in aerobic zone although they both declined with decrease of C/N *** result provides solid support for better controlling the pollution of mariculture wastewater.

关键词： mariculture wastewater C/N ratio A/O-MBBR process EPS

Impact of Phenanthrene on Denitrification Activity and Transcription of Related Functional Genes in Estuarine and Marine Sediments

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Journal of Ocean University of China 2020年第1期19卷 124-134页

作者： SUN Pengfei BAI Jie LI Kuiran zhao yangguo TIAN Weijun BAI Xiaoyan TIAN Yanzhao College of Environmental Science and Engineering Ocean University of ChinaQingdao 266100China The Key Laboratory of Marine Environmental Science and Ecology Ministry of EducationOcean University of ChinaQingdao 266100China College of Marine Life Science Ocean University of ChinaQingdao 266003China

The effects of phenanthrene(Phe)on the denitrification activity and denitrifying genes(narG,nirS and nosZ)were evaluated by dose-response experiments in sediments of Dagu River Estuary(DRE)and Jiaozhou Bay(JZB).The results showed that potential denitrification activity(PDA),N2O,NO3−and NO2−reduction rates of both areas were inhibited with an increase of Phe *** PDA,N2O,NO3−and NO2−reduction rates of both areas was highest and lowest in the control(DRE:0.453,0.427,7.439 and 3.222mgNkg−1 h−1,JZB:0.592,0.555,8.470 and 3.793mgNkg−1 h−1)and highest Phe amended treatments(DRE:0.069,0.001,4.486,and 1.563 mgNkg−1 h−1;JZB:0.114,0.024,5.527 and 2.200 mgNkg−1 h−1).The inhibition rate of PDA was highest,follow by NO2−reduction and then NO3−***,with the increasing of Phe concentrations,total bacteria count and the abundance of denitrifying genes were *** N2O accumulation was promoted with the addition of Phe for both *** on the comparison of EC50 values,denitrifiers harboring three genes were more sensitive to Phe than PDA,and denitrifiers harboring nirS gene were more sensitive,followed by nosZ gene,and then narG ***,according to correlation analysis,the relative abundance of denitrifying genes was much more positively correlated with PDA,NO3−and NO2−reduction than total bacteria *** addition,the denitrification activity and total bacteria count in JZB were more inhibited than that of *** study is useful for understanding the impact of Phe pollution on denitrification in estuary and marine sediments,with profound implications for the management of aquatic ecosystems regarding eutrophication(N-removal)and greenhouse effect.

关键词： phenanthrene effect denitrification denitrifying genes estuarine sediment marine sediment

Salt-tolerant Microbiota Enhancing Contaminants Removal from Mariculture Wastewater Containing Sulfamethoxazole in an A/O-MBBR

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Journal of Ocean University of China 2020年第4期19卷 865-873页

作者： ZHENG Bingbing PANG Wenhui zhao yangguo GUO Liang GAO Mengchun JIN Chunji SHE Zonglian Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering(MEGE) College of Environmental Science and EngineeringOcean University of ChinaQingdao 266100China Key Laboratory of Marine Environment and Ecology(Ocean University of China) Ministry of EducationQingdao 266100China

The wide application of antibiotics in aquaculture requires an efficient treatment of the wastewater before discharging it into the *** the wastewater treatment,the influence of antibiotics on the performance of bioreactor should be well revealed due to their toxicity to the functional microbial *** this study,the effect of feeding 10-30 mg L−1 sulfamethoxazole(SMX)in influent on the performance of an anoxic/oxic-moving bed biofilm reactor(A/O-MBBR)treating mariculture wastewater and the responding change of biofilm microbial communities was *** COD average removal rate remained at 94.61%-97.34%with the dosage of *** with that,the nitrifying removals of NH4+-N and NO2−-N were violently inhibited by 30 mg L−1 SMX and denitrifying removal of the NO3−-N decreased obviously with 20 mg L−1 or more *** microbial community in the successful startup bioreactor was relatively abundant,while the diversity of microbial community decreased with the increase of feeding *** salt-tolerant and SMX-resistant genera Arcobacter,Thiothrix,Desulfuromusa and Nitrosomonas were gradually enriched and finally played a vital role in converting COD and recycling nitrogen and ***,the present A/O-MBBR reactor with the salt-tolerant functional microbiota achieved efficient removal of pollutants in the presence of low concentration(e.g.,10 mg L−1)SMX.

关键词： sulfamethoxazole mariculture wastewater inorganic nitrogen microbial community A/O-MBBR

Insight into the Inhibition of the Poisonous Sulfide Production from Sulfate-Reducing Microbiota in Mariculture Habitat

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