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A Comparative Study of Pollutant Removal Stability in Hybrid Wetland Columns

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湿地科学 2012年第2期10卷 142-148页

作者： Tanveer Ferdous Saeed guangzhi sun Department of Civil Engineering Ahsanullah University of Science and Technology Dhaka 1208 Bangladesh Department of Civil Engineering Building 60 Monash University Clayton Victoria 3800 Australia Department of Chemical Engineering James Cook University Townsville Queensland 4811 Australia

This study investigated the effects of two alternative substrates(wood mulch and zeolite) on the performance of three laboratory-scale hybrid wetland systems that had identical system components and *** system consisted of a vertical flow(VF) wetland column,followed by a horizontal flow(HF) column and a vertical flow *** substrates employed were wood mulch,gravel and zeolite,and Phragmites australis were planted in each *** systems received synthetic wastewater,with pollutant loadings in the range of 8.5-38.0 g/(m2·d) total nitrogen(TN) and 4.0-46.4 g/(m2·d) biological oxygen demand(BOD5).Wood mulch and zeolite substrates showed higher efficiencies in terms of removing nitrogenous compounds and biodegradable *** supply of organic carbon from the organic mulch substrates enhanced denitrification,while adsorption of influent ammoniacal nitrogen(NH4-N) in zeolite played a major role in the removal of nitrogenous species in the wetland ***,the average percentage removals of TN and BOD5 reached >66% and >96% respectively,indicating stable performances by the hybrid wetland systems under the experimental loading *** models were developed,based on the combination of Monod kinetics and continuously-stirred tank reactor(CSTR) flow patterns to describe the degradation of nitrogenous *** by the models closely matched the experimental data,indicating the validity and potential application of Monod kinetics in the modelling and design of treatment wetlands.

关键词：摘要编辑部编辑工作读者

The Design of Treatment Wetlands in the United Kingdom:Successes,Failures,and Alternative Approaches

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湿地科学 2008年第2期6卷 343-350页

作者： sun guangzhi ZHANG Guangxin Department of Civil Engineering Monash University Building 60 VIC 3800 Anstralia Northeast Institute of Geography and Agroecology Chinese Academy of Sciences Changchun 130012 Jilin P. R. China

Constructed wetland was first introduced into the United Kingdom in the middle of 1980s,following a visit by a group of scientist to Western *** the past 2 decades,the applications of constructed wetlands in this country have expanded substantially,due to the demand for green technologies and rising cost of fossil fuel *** paper reported a statistical investigation of the performances of 78 horizontal flow wetlands,representatives of such system in the United *** design equations,based on organic matter removal efficiency,have been developed from Monod kinetics,and the accuracy and reliability of current and alternative design approaches have been examined.

关键词：湿地保护环境保护治理措施水土流失

Pollutant removal from municipal wastewater employing baffled subsurface flow and integrated surface flow-floating treatment wetlands

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Journal of Environmental Sciences 2014年第4期26卷 726-736页

作者： Tanveer Saeed Abdullah Al-Muyeed Rumana Afrin Habibur Rahman guangzhi sun Department of Civil Engineering Ahsanullah University of Science and Technology Department of Civil Engineering Bangladesh University of Engineering and Technology School of Engineering and Physical Sciences James Cook University

This article reports pollutant removal performances of baffled subsurface flow, and integrated surface flow-floating treatment wetland units, when arranged in series for the treatment of municipal wastewater in Bangladesh. The wetland units （of the hybrid system） included organic, inorganic media, and were planted with nineteen types of macrophytes. The wetland train was operated under hydraulic loading fluctuation and seasonal variation. The performance analyses （across the wetland units） illustrated simultaneous denitrification and organics removal rates in the first stage vertical flow wetland, due to organic carbon leaching from the employed organic media. Higher mean organics removal rates （656.0 g COD]（***）） did not completely inhibit nitrification in the first stage vertical flow system; such pattern could be linked to effective utilization of the trapped oxygen, as the flow was directed throughout the media by the baffle walls. Second stage horizontal flow wetland showed enhanced biodegradable organics removal, which depleted organic carbon availability for denitrification. The final stage integrated wetland system allowed further nitrogen removal from wastewater, via nutrient uptake by plant roots （along with nitrification）, and generation of organic carbon （by the dead macrophytes） to support denitrification. The system achieved higher E. coli mortality through protozoa predation, E. coli oxidation, and destruction by UV radiation. In general, enhanced pollutant removal efflciencies as demonstrated by the structurally modified hybrid wetland system signify the necessity of such modification, when operated under adverse conditions such as： substantial input organics loading, hydraulic loading fluctuation, and seasonal variation.

关键词： constructed wetlands loading fluctuation media nitrogen organics seasonal variation

Ammoniacal Nitrogen and Organics Removal Modelling in Vertical Flow Wetlands Treating Strong Wastewaters

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湿地科学 2013年第4期11卷 421-432页

作者： Tanveer Ferdous Saeed Abdullah A1 Muyeed guangzhi sun Department of Civil Engineering Ahsanullah University of Science and Technology Dhaka Bangladesh School of Engineering and Physical Sciences James Cook University Townsville QLD 4811 Australia)

This paper reports a comparative evaluation between 2 kinetic models for predicting nitrification and biodegradable organics(BOD5)removal rates in 5 vertical flow(VF)wetland systems,that received strong wastewaters(***,textile and municipal effluents).The models were formulated by combining first order and Monod kinetics,with continuous-stirred tank reactor(CSTR)flow *** performance of the 2 models had been evaluated with3 statistical parameters:coefficient of determination(R2),relative root mean square error(RRMSE),and model efficiency(ME).The statistical parameters indicated better performance of the Monod CSTR model(over first order CSTR approach),for correlating ammoniacal nitrogen(NH4+—N)and BOD5removal profiles across VF *** Monod coefficient values(from Monod CSTR model)coincided with greater input NH4+—N and BOD5loading,and experimentally measured removal rate(g/(m2·d))*** trends indicate that NH4+—N and BOD5removals in the VF systems were mainly achieved via biological *** the other hand,the rate constants(from the first order CSTR model)did not exhibit such correlations(of Monod coefficients),elucidating their inefficiencies in capturing overall removal *** interference of organics removal on nitrification process(in VF wetlands)was identified through Monod *** deviation between NH4+—N and BOD5Monod coefficients imply incorporation of both coefficients,for calculating the area of a single VF ***,closer performance of the Monod CSTR model for predicting NH4+—N and BOD5removals indicate its potential application,as a design tool for VF systems.

关键词： CSTR 废物处理技术方法 BOD

Is There Any Correlation Between Landscape Characteristics and Total Nitrogen in Wetlands Receiving Agricultural Drainages?

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Chinese Geographical Science 2019年第4期29卷 712-724页

作者： YU Han WANG Xiaodong CHU Lijuan WANG Guodong sun guangzhi sun Mingyang WANG Jingyu JIANG Ming College of Agriculture Jilin Agricultural University Changchun 130118 China Key Laboratory of Wetland Ecology and Environment Northeast Institute of Geography and Agroecology Chinese Academy of Science Changchun 130102 China College of Urban and Environmental Sciences Changchun Normal University Changchun 130032 China School of Engineerings Edith Cowan University Joondalup 6027 Australia College of Art and Design Jilin Jianzhu University Changchun 130118 China Jilin Academy of Agriculture Sciences Changchun 130033 China

In the case of increasing fragmentation of wetlands, the study of the relationship between wetland landscape characteristics and total nitrogen(TN) in water is of great significance to reveal the mechanism of wetland water purification. Taking the Naoli River(NR) wetlands in Northeast China as the research object, 10 uniformly distributed sampling sites in the study area were sampled in August 2015 to test the TN concentration and interpret the images of NR wetlands in the same period. Taking the sampling site as the control point, the whole wetlands were divided into 10 regions, and the landscape index of each region was extracted. In order to reveal whether the landscape characteristics are related to the TN concentration in the wetlands water body, the landscape index and the TN concentration in the control point water body were analyzed by correlation analysis, step-by-step elimination analysis and path analysis to reveal whether the landscape characteristics are related to the TN concentration under wetlands receiving agricultural drainages. The results showed that the correlation coefficients between four area indexes or eight shape indexes and TN concentration did not reach a significant correlation level(P > 0.05), indicating that TN removal was not only determined by a single landscape index. The path coefficient of edge density(ED) index is –0.41, indicating that wetland patch connectivity is the primary factor of TN removal, and there is no relationship between the larger patch area and the higher TN removal. The removal of TN in wetlands is restricted by the synergistic effect of landscape area and shape characteristics.

关键词： Naoli River wetlands total nitrogen removal spatial pattern step-by-step elimination analysis agricultural drainages

Simulation and evaluation of the water purification function of Zhalong Wetland based on a combined water quantity-quality model

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Science China(Technological Sciences) 2012年第10期55卷 1973-1981页

作者： LI HongYan ZHANG GuangXin sun guangzhi Key Laboratory of Wetland Ecology and Environment Northeast Institute of Geography and AgroeeologyChinese Academy of SciencesChangchun 130012China Jilin Geological Environment Monitoring Station Changchun 130021China School of Engineering and Physical Sciences James Cook UniversityTownsvilleQLD 4811Australia

The water purification function of natural wetland systems is widely recognized,but rarely studied or scientifically *** studies have been carried out by various international wetland research communities to quantify the water quality improvement ability of the natural wetlands,in order to maintain such ability and wetland ecological *** study aims to evaluate the purification function of Zhalong Wetland in China for removing total nitrogen(TN) and phosphorus(TP),based on ex-situ experiments and the development of a combined water quantity-quality *** and model predictions were carried out with different input TP and TN *** analyses demonstrated that the relative errors between model simulations and experimental observations for TN and TP were 8.6% and 12.4%,*** water retention time being maintained at 90 d,the removal rate of these pollutants could not reach the required Grade V standards,if the inflow TN concentration was over 42 mg L-1,or the input TP concentration was over 14 mg *** simulation results also demonstrated that,even with Grade V quality standard compliance,when the water inflow from surrounding industries and agriculture lands into Zhalong Wetland reaches 0.3×10 8 m 3 a-1,the maximum TN and TP loads that the reserve can cope with are 1.26×10 3 t a-1 and 0.42×10 3 t a-1,***,this study has produced a significant amount of information that can be used for the protection of water quality and ecological health of Zhalong Wetland.

关键词： combined water quantity-quality model water purification function WASP model Zhalong Wetland

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Measurement of bone alkaline phosphatase and relative study with osteosarcoma

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Frontiers of Medicine 2007年第1期1卷 54-57页

作者： YANG Zhiping HUO Yanqing sun guangzhi LI Jianmin LI Xin Orthopaedic Department Qilu Hospital of Shandong UniversityJinan 250012China Orthopaedic Department Second Hospital of Shandong UniversityJinan 250033China Orthopaedic Department The Fourth People Hospital of JinanJinan 250031China

The objective of this paper is to explore the value of bone alkaline phosphatase(BALP)for diagnosing osteosarcoma,evaluating the effect of the chemotherapy,judging the prognosis and supervising the relapse and *** immunoassay was used to check the BALP of the blood serum that was from 42 primary osteosarcoma *** phosphatase(ALP)in blood serum was checked with auto biochemistry *** biopsy tissue and the lesion resected in operation were treated with pathology and histological response was *** patients were followed up from five months to 49 months with an average of 24.3 *** cases relapsed and transferred,among which,16 of them were dead,and others were survival to the end of the *** was more sensitive than ALP in diagnosing osteosarcoma(P=0.015).Fifteen cases decreased to normal value in ALP after preoperative chemotherapy,and 34 cases decreased in *** ALP and BALP in all cases decreased to normal value in *** was significant difference in positive correlation between the decrease of BALP and the increase of histological response(P=0.001,r=0.642).In the followup,there was significant difference in BALP between the group of relapse and transfer and the group of free disease survival(P=0.000).As a check marker in blood serum,BALP,reflecting the process of ossification,has a higher sensitivity than *** has applied value in the diagnosis of osteosarcoma,reflection of the effect of chemotherapy and forecast the prognosis.

关键词： osteosarcoma alkaline phosphatase

Investigation of transfer ionization processes in the collision of partially stripped carbon ions on Argon

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Science China(Physics,Mechanics & Astronomy) 2008年第7期51卷 750-754页

作者： WANG Jun CHEN XiMeng DING BaoWei FU HongBin CUI Ying SHAO JianXiong LU YanXia GAO ZhiMin LIU YuWen Du Juan sun guangzhi CHEN Lin Department of Nuclear Science and Technology Lanzhou UniversityLanzhou 73000China

The ratios of the cross section of the transfer-ionization to the single-electron-capture of Argon induced by Cq+ (q=1,2,3) ions are measured by means of position sensitive and time-of-flight techniques. Our experimental results are compared with the data of Heq+ (q=1,2)-Ar of DuBois. A qualitative interpretation is presented based on the Classical-Over-Barrier Model of Bohr.

关键词： ion-atom collision transfer-ionization single-electron-capture over barrier model

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堆外核测量系统裂变电离室线性响应研究

核电子学与探测技术 2024年第3期44卷 454-463页

作者：邱顺利董进诚葛孟团肖伟孙光智周宇琳曾乐刘海峰翟春荣汤仲鸣石先武刘文臻武汉第二船舶设计研究所武汉430205 国核自仪系统工程有限公司上海200233

为满足先进反应堆堆外核测量系统中间量程测量通道灵敏度高、探测器灵敏区长、反应堆线性响应好的需求,采用多支灵敏区长度具有一定比例关系、同时机械结构完全相同的裂变电离室,进行热中子灵敏度标定和反应堆线性响应研究,以为核电厂... 详细信息

为满足先进反应堆堆外核测量系统中间量程测量通道灵敏度高、探测器灵敏区长、反应堆线性响应好的需求,采用多支灵敏区长度具有一定比例关系、同时机械结构完全相同的裂变电离室,进行热中子灵敏度标定和反应堆线性响应研究,以为核电厂实际所需长灵敏区裂变电离室提供一种在现有试验堆条件下进行其核性能试验的方法。通过测量不同灵敏区长度的裂变电离室热中子灵敏度和反应堆高中字注量率下的线性响应,对其热中子灵敏度随灵敏区长度的线性变化和反应堆线性响应进行试验验证。测量结果表明,裂变电离室热中子灵敏度随灵敏区长度呈线性关系,且在反应堆热中子注量率1.23×10^(2)~3.10×10^(10)nv(1nv=1n·cm^(-2)·s^(-1))范围内进行计数率模式和MSV模式线性拟合,裂变电离室最大线性度为-1.23%。

关键词：堆外核测量系统裂变电离室反应堆线性响应热中子灵敏度线性度