Water Quality Research Journal of Canada最新文献_第9页

Kinetic studies of phosphate adsorption onto construction solid waste (CSW) 建筑固体废物(CSW)吸附磷酸盐的动力学研究

IF 2

Water Quality Research Journal of Canada Pub Date : 2014-11-01 DOI: 10.2166/WQRJC.2014.013

C. Liu, Y. Yang, N. Wan

{"title":"Kinetic studies of phosphate adsorption onto construction solid waste (CSW)","authors":"C. Liu, Y. Yang, N. Wan","doi":"10.2166/WQRJC.2014.013","DOIUrl":"https://doi.org/10.2166/WQRJC.2014.013","url":null,"abstract":"Adsorption of phosphate onto construction solid waste (CSW) was investigated in a batch system. CSW as an inescapable by-product of the construction and demolition process, was used as a composite adsorbent for the removal of phosphate in this study. The adsorption kinetics was investigated under various parameters such as contact time, pH, CSW dosage, initial phosphate concentration and particle size. Greater percentage of phosphate was removed with decrease in the initial concentration and increase in the amount of CSW used. Adsorption of phosphate was pH dependent, and maximum phosphate immobilisation capacity was obtained in alkaline condition. Lagergren ﬁrst-order, second-order, intra-particle diffusion and external diffusion model were used to test the experimental data. Kinetic analysis showed that the adsorption was best ﬁtted with the pseudo-second-order kinetic model. Adsorption mechanism studies revealed that both external mass transfer and intra-particle diffusion had rate limiting effects on the removal process. These results demonstrated that the CSW could be used as a low-cost adsorbent media for phosphate removal, and the data were relevant for optimal design of wastewater treatment plants.","PeriodicalId":54407,"journal":{"name":"Water Quality Research Journal of Canada","volume":"49 1","pages":"307-318"},"PeriodicalIF":2.0,"publicationDate":"2014-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2166/WQRJC.2014.013","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67981161","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Markov Chain Monte Carlo (MCMC) simulation of geostatistical variogram parameters of spatial soil test phosphorus using a Gibbs sampler 利用吉布斯采样器对空间土壤试磷地统计变异参数进行了马尔可夫链蒙特卡罗模拟

IF 2

Water Quality Research Journal of Canada Pub Date : 2014-09-18 DOI: 10.2166/WQRJC.2014.048

A. Boluwade, C. Madramootoo

引用次数: 0

Comparison of autoregressive moving average and state space methods for monthly time series modelling of Labrador and South-East Quebec river flows 自回归移动平均和状态空间方法在拉布拉多和东南魁北克河流量月时间序列建模中的比较

IF 2

Water Quality Research Journal of Canada Pub Date : 2014-08-04 DOI: 10.2166/WQRJC.2015.021

Carissa Sparkes, L. Lye, S. Richter

{"title":"Comparison of autoregressive moving average and state space methods for monthly time series modelling of Labrador and South-East Quebec river flows","authors":"Carissa Sparkes, L. Lye, S. Richter","doi":"10.2166/WQRJC.2015.021","DOIUrl":"https://doi.org/10.2166/WQRJC.2015.021","url":null,"abstract":"Time series data such as monthly stream flows can be modelled using time series methods and then used to simulate or forecast flows for short term planning. Two methods of time series modelling were reviewed and compared: the well-known auto regressive moving average (ARMA) method and the state-space time-series (SSTS) method. ARMA has been used in hydrology to model and simulate flows with good results and is widely accepted for this purpose. SSTS modelling is a more recently developed method that is relatively unused for hydrologic modelling. This paper focuses on modelling the stream flows from basins of different sizes using these two time series modelling methods and comparing the results. Three rivers in Labrador and South-East Quebec were modelled: the Romaine, Ugjoktok and Alexis Rivers. Both models were compared for accuracy of prediction, ease of software use and simplicity of model to determine the preferred time series methodology approach for modelling these rivers. The SSTS was considered very easy to use but model diagnostics were found to require a high level of statistical understanding. Ultimately, the ARMA method was determined to be the better method for the typical engineer to use, considering the diagnostics were simple and the monthly flows could be easily simulated to verify results.","PeriodicalId":54407,"journal":{"name":"Water Quality Research Journal of Canada","volume":"51 1","pages":"200-218"},"PeriodicalIF":2.0,"publicationDate":"2014-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2166/WQRJC.2015.021","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67982112","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Application of a solid phase extraction-liquid chromatography method to quantify phenolic compounds in woodwaste leachate 固相萃取-液相色谱法定量测定木材废弃物渗滤液中酚类化合物

IF 2

Water Quality Research Journal of Canada Pub Date : 2014-08-01 DOI: 10.2166/WQRJC.2014.002

N. Kamal, Rosa Galvez, G. Buelna

{"title":"Application of a solid phase extraction-liquid chromatography method to quantify phenolic compounds in woodwaste leachate","authors":"N. Kamal, Rosa Galvez, G. Buelna","doi":"10.2166/WQRJC.2014.002","DOIUrl":"https://doi.org/10.2166/WQRJC.2014.002","url":null,"abstract":"Woodwaste produces large volumes of leachate, which often contains high concentrations of phenolic compounds. These compounds are environmental contaminants whose proper management and treatment are mandated to reduce associated environmental impacts. Quality diagnostic and treatment efficiency assessments necessitate the development of rapid, accurate, and reproducible methods of detection and analysis to accurately quantify phenolic compounds. Liquid chromatography (LC) analysis with ultraviolet (UV) detection and solid-phase extraction (SPE) sample preparation on Oasis HLB cartridges were performed and adapted to quantify eight priority phenolic compounds in woodwaste leachate. The method was validated on a synthetic solution simulating the woodwaste leachate, on spiked real woodwaste leachate to 1 μg mL −1 , and applied to quantify phenolic compounds in the real woodwaste leachate. Calibration curves were linear for all compounds in the range of 1–30 μg mL −1 , and high recoveries varying between 93.5% for 2-chlorophenol and 112.8% for 4-nitrophenol were obtained. Detection limits ranged from 0.06 μg L −1 for 2-chlorophenol to 0.129 μg L −1 for phenol. The proposed method reduced interference, background noise, analysis time, amount of organic solvents and is less costly when compared with other methods.","PeriodicalId":54407,"journal":{"name":"Water Quality Research Journal of Canada","volume":"49 1","pages":"210-222"},"PeriodicalIF":2.0,"publicationDate":"2014-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2166/WQRJC.2014.002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67980272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Modelling of a carbon removal biological aerated filter doing partial nitrification during large-scale secondary treatment 在大规模二级处理过程中进行部分硝化的除碳生物曝气过滤器的建模

IF 2

Water Quality Research Journal of Canada Pub Date : 2014-08-01 DOI: 10.2166/WQRJC.2014.045

Jean Bernier, V. Rocher, S. Guérin, P. Lessard

{"title":"Modelling of a carbon removal biological aerated filter doing partial nitrification during large-scale secondary treatment","authors":"Jean Bernier, V. Rocher, S. Guérin, P. Lessard","doi":"10.2166/WQRJC.2014.045","DOIUrl":"https://doi.org/10.2166/WQRJC.2014.045","url":null,"abstract":"A wastewater biofiltration model is used to assess the potential of modelling plant-sized secondary carbon removal biofilter units. Two distinct datasets collected at the Seine-Centre biofiltration plant (Colombes, France) are used. The model is first calibrated on multiple grab samples taken at different heights inside the filter media. Data from 24 hour composite samples at the unit influent and effluent over a 2 year period are then simulated. Additional data are used to estimate hourly concentration profiles from composite samples in order to correctly use both composite and grab samples during modelling. The calibrated model is in most cases able to correctly predict the general nutrient behaviour for both datasets. The results of statistical scores such as the mean error and the mean absolute error are low for soluble components and remain correct for particles during years 2008–2009. Only one parameter set containing few heavily modified values is used to obtain these results. Modelling plant-sized biofilters appears to be practical and can be useful for easily evaluating plant optimization scenarios.","PeriodicalId":54407,"journal":{"name":"Water Quality Research Journal of Canada","volume":"49 1","pages":"245-257"},"PeriodicalIF":2.0,"publicationDate":"2014-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2166/WQRJC.2014.045","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67981034","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Synergistic degradation of hospital wastewater by solar/TiO2/Fe2+/H2O2 process 太阳能/TiO2/Fe2+/H2O2协同降解医院废水

IF 2

Water Quality Research Journal of Canada Pub Date : 2014-08-01 DOI: 10.2166/WQRJC.2014.026

S. A. Kumar, G. Lekshmi, Rajesh Banu Jeyakumar, I. Yeom

引用次数: 18

Analytical and numerical solutions for sediment and heavy metal transport: a 1D simplified case 泥沙和重金属运移的解析解和数值解:一维简化情况

IF 2

Water Quality Research Journal of Canada Pub Date : 2014-08-01 DOI: 10.2166/WQRJC.2014.028

A. Álvarez, A. Trento

{"title":"Analytical and numerical solutions for sediment and heavy metal transport: a 1D simplified case","authors":"A. Álvarez, A. Trento","doi":"10.2166/WQRJC.2014.028","DOIUrl":"https://doi.org/10.2166/WQRJC.2014.028","url":null,"abstract":"The use of mathematical models to study the transport of suspended sediments and heavy metals (HM) in water and riverbeds is of growing interest among the scientific community. A model of three partial differential equations solved by a numerical scheme of a third order was applied. The aim was to verify a numerical one-dimensional (1D) model for sediment and heavy metal concentrations in the water and bed applying analytical solutions, for three sedimentological conditions with a continuous source. The importance of the magnitude and sense of the diffusive process in the active bed sediment layer was studied. Differences between numerical and analytical results were quantified for: sediment concentration in the water column, total HM concentration in the water column and HM concentration in bed sediments. All these differences were less than 0.4% in all cases. Numerical results for two more complex scenarios were included. For the first scenario, water without HM flowing over a contaminated bed was assumed, whereas for the second one, the opposite – contaminated water with HM flowing over a clean bed − was adopted. A brief analysis of the initial conditions of HM concentration showed the importance of determining such initial conditions in actual environmental studies.","PeriodicalId":54407,"journal":{"name":"Water Quality Research Journal of Canada","volume":"49 1","pages":"258-272"},"PeriodicalIF":2.0,"publicationDate":"2014-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2166/WQRJC.2014.028","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67980817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

A laboratory study using maple leaves as a biosorbent for lead removal from aqueous solutions 用枫叶作为生物吸附剂去除水溶液中的铅的实验室研究

IF 2

Water Quality Research Journal of Canada Pub Date : 2014-08-01 DOI: 10.2166/WQRJC.2014.027

A. Hossain, H. Ngo, Wenshan Guo, Jian Zhang, S. Liang

{"title":"A laboratory study using maple leaves as a biosorbent for lead removal from aqueous solutions","authors":"A. Hossain, H. Ngo, Wenshan Guo, Jian Zhang, S. Liang","doi":"10.2166/WQRJC.2014.027","DOIUrl":"https://doi.org/10.2166/WQRJC.2014.027","url":null,"abstract":"This study tested the ability of maple leaf powder (MLP) to reduce the level of Pb(II) ions in aqueous solutions. As a biosorbent, MLP has a larger specific surface area (10.94 m 2 /g) and contains Pb(II) binding functional groups. The highest Pb(II) removals were achieved at pH of 6.2, particle size of less than 75 μm, dose of 0.5 g, initial concentration of 10 mg/l and equilibrium time of >15 minutes. Thermodynamic results indicated that the Pb(II) adsorption process was spontaneous and exothermic. MLP biosorbent could be reused for five cycles after successfully recovery by 0.1N H 2 SO 4 . Both adsorption and desorption data fit well with Langmuir and Sips isotherm models ( R 2 ≈ 0.961–1.00). The Pb(II) adsorption and desorption capacities ( q m ) of MLP were up to 50.27 mg/g and 40.06 mg/g, respectively, for a 1 g dose at room temperature. Kinetics processes were rate controlling step and showed good fitness with the pseudo-second order and intraparticle diffusion models. Results suggest that multiple mechanisms (chelating bond, physisorption and chemisorption) are involved to adsorb the Pb(II) ions on to MLP. Higher Pb(II) removal revealed the practical applicability of MLP in water and wastewater treatment systems.","PeriodicalId":54407,"journal":{"name":"Water Quality Research Journal of Canada","volume":"49 1","pages":"195-209"},"PeriodicalIF":2.0,"publicationDate":"2014-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2166/WQRJC.2014.027","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67980807","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 11

Perchlorate removal using two component biodegradable carriers in particle-fixed biofilm reactor 双组分生物降解载体在颗粒固定生物膜反应器中去除高氯酸盐

IF 2

Water Quality Research Journal of Canada Pub Date : 2014-08-01 DOI: 10.2166/WQRJC.2014.047

Fang He, Fusheng Li, Hai-hong Zhou, Lingling Niu, Liguo Wang

{"title":"Perchlorate removal using two component biodegradable carriers in particle-fixed biofilm reactor","authors":"Fang He, Fusheng Li, Hai-hong Zhou, Lingling Niu, Liguo Wang","doi":"10.2166/WQRJC.2014.047","DOIUrl":"https://doi.org/10.2166/WQRJC.2014.047","url":null,"abstract":"In this research, biocompounds designed out of two polymers having different degradability was investigated for use as the sole carbon source and biofilm carrier to remove perchlorate in particle-fixed biofilm reactors. Both laboratory batch and column experiments were conducted with perchlorate contaminated groundwater. Batch experiments demonstrated clearly that ClO4– was removed from the aqueous phase readily and the degradation rate constants ( k ) changed in the range of 0.23–0.37 mg/L h as ClO4– concentration increased from 2 to 8 mg/L. Simultaneous perchlorate and nitrate degradation occurred in the polymer bioreactor. Effluent concentrations of perchlorate varied positively with temperature and fitted the Arrhenius equation expression as k = k 20•100.0316( t –20) over the range of 13–30 °C. No perchlorate was detected in the effluent of polymer columns after 20 days’ startup. Complete perchlorate removal was observed at a hydraulic loading rate doubled to 1.8 mL/min. Images prove the concept of the pore and filament structure within the biocompounds, which provide both a heterotrophic biofilm and carbon source. Denaturing gradient gel electrophoresis analysis and partial sequencing of 16S rRNA genes indicated that formerly reported perchlorate-reducing bacteria were present in the polymer particle-fixed biofilm reactors.","PeriodicalId":54407,"journal":{"name":"Water Quality Research Journal of Canada","volume":"49 1","pages":"234-244"},"PeriodicalIF":2.0,"publicationDate":"2014-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2166/WQRJC.2014.047","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67981045","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Treatment characteristics and effects of nanoparticle zero-valent iron (nZVI) powder on nitrogen removal efficiency for sewage treatment 纳米颗粒零价铁(nZVI)粉在污水处理中的处理特性及对脱氮效率的影响

IF 2

Water Quality Research Journal of Canada Pub Date : 2014-08-01 DOI: 10.2166/WQRJC.2014.102

Mi-Sug Kim, D. Kwak

{"title":"Treatment characteristics and effects of nanoparticle zero-valent iron (nZVI) powder on nitrogen removal efficiency for sewage treatment","authors":"Mi-Sug Kim, D. Kwak","doi":"10.2166/WQRJC.2014.102","DOIUrl":"https://doi.org/10.2166/WQRJC.2014.102","url":null,"abstract":"This study aims at estimating nanoparticle typed zero-valent iron (nZVI) process as an advanced nitrogen removal technique. To focus on investigating characteristics and effects of nZVI on nitrogen removal for sewage treatment, batch reactor experiments were conducted to reduce excessive nitrate nitrogen (NO3-N). To improve NO3-N removal efficiency and to find a supporter or alternative of nZVI, silica sand, synthetic zeolite, and a mixture of silica sand, synthetic zeolite, and nZVI were used in the experiments. As a result of this study, the chemical denitrification by nZVI attracted on the magnet surface may be useful for total nitrogen removal in conventional sewage and wastewater treatment plants under the optimal conditions, and application of silica sand also is an excellent adsorbent or media for N-component removal and a supporter as well. This study concludes the end product in this study may be nitrogen gas (N2) through Fe reaction with O2 and NO3− in aerobic nZVI (Fe)–H2O system. Future study is required to examine the competition of nZVI between nitrate and many other compounds depending upon various experimental conditions for improving the nitrate removal efficiency and impeding the ammonium generation.","PeriodicalId":54407,"journal":{"name":"Water Quality Research Journal of Canada","volume":"49 1","pages":"273-284"},"PeriodicalIF":2.0,"publicationDate":"2014-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2166/WQRJC.2014.102","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67980824","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1