Water Quality Research Journal最新文献_第8页

Numerical investigation on the impact of wind-induced hydraulics on dissolved oxygen characteristics in a shallow stormwater pond 风致水力学对浅层雨水池溶解氧特性影响的数值研究

IF 2.3 4区环境科学与生态学

Water Quality Research Journal Pub Date : 2019-11-01 DOI: 10.2166/WQRJ.2019.002

Liyu Chen, P. D'Aoust, C. Rennie, Alexandre J. Poulain, F. Pick, Ru Wang, R. Delatolla

{"title":"Numerical investigation on the impact of wind-induced hydraulics on dissolved oxygen characteristics in a shallow stormwater pond","authors":"Liyu Chen, P. D'Aoust, C. Rennie, Alexandre J. Poulain, F. Pick, Ru Wang, R. Delatolla","doi":"10.2166/WQRJ.2019.002","DOIUrl":"https://doi.org/10.2166/WQRJ.2019.002","url":null,"abstract":"\u0000 Stormwater ponds (SWPs) are widely utilized for flood and water quality control. Low-flow rates are common in SWPs, sometimes causing wind-driven currents to become the dominant hydrodynamic force during ice-free periods. Hence, it is essential to understand the influence of the wind-induced flow on stratification and dissolved oxygen (DO) concentrations in shallow SWPs to predict the performance and water quality of these systems. The objective of this study is to evaluate the influence of wind-driven circulation on the spatial distribution of DO in an SWP using a numerical model. A bottom-mounted acoustic Doppler current profiler (ADCP) was utilized to measure small wind-induced currents and to validate a hydrodynamic model, which suggested that a wind-dominated circulation was generated even with the moderate wind speed. Countercurrents opposite in the direction to surface wind-generated flow were also present. The DO model demonstrated that complete mixing can be produced by higher wind speed, leading to fully oxic conditions throughout the water column (7.00 mg/L DO or higher), wherein low DO water at depth was carried to the surface by upwelling circulation and was possibly replenished during the surface transportation. This sheds some light on the impact of wind-induced mixing on the water quality in shallow SWPs.","PeriodicalId":23720,"journal":{"name":"Water Quality Research Journal","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2166/WQRJ.2019.002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47022390","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Development of PANI/BN-based absorbents for water remediation 聚苯胺/溴基水处理吸附剂的研制

IF 2.3 4区环境科学与生态学

Water Quality Research Journal Pub Date : 2019-11-01 DOI: 10.2166/WQRJ.2019.048

M. Arsalan, Azka Awais, Tingting Chen, Qinglin Sheng, Jianbin Zheng

{"title":"Development of PANI/BN-based absorbents for water remediation","authors":"M. Arsalan, Azka Awais, Tingting Chen, Qinglin Sheng, Jianbin Zheng","doi":"10.2166/WQRJ.2019.048","DOIUrl":"https://doi.org/10.2166/WQRJ.2019.048","url":null,"abstract":"\u0000 In this research, novel PANI/BN-based absorbent was prepared by bonding polyaniline and bentonite for water remediation and their structures were characterized by scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR). The effect of pH, concentration of metal, and dosage amount on synthesized novel PANI/BN-based absorbent was investigated in detail. The result indicated that the PANI/BN-based absorbent has an excellent adsorption performance towards Cu, Pb, and Ni, and the highest binding capacity of 130 mg g−1 for Ni was obtained under normal conditions. The adsorption of PANI/BN absorbent was found to depend on pH when pH < 7.0, but the adsorption has been found independent from the ionic bond effect. The adsorption at optimum pH for Cu (pH 6) and Pb (pH 5) was observed as 85 mg g−1 and 105 mg g−1, respectively. The best results collected at those conditions of isotherm data and adsorption kinetics are represented by the Langmuir model and pseudo-second order equation, respectively. Thermodynamic results (ΔH > 0, ΔS > 0, ΔG < 0) showed that the adsorption process of Cu, Ni, and Pb is significantly increased by the synthesized novel PANI/BN-based absorbent.","PeriodicalId":23720,"journal":{"name":"Water Quality Research Journal","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2166/WQRJ.2019.048","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45791152","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Manganese removal processes at 10 groundwater fed full-scale drinking water treatment plants 10个地下水供水的全尺寸饮用水处理厂的除锰工艺

IF 2.3 4区环境科学与生态学

Water Quality Research Journal Pub Date : 2019-11-01 DOI: 10.2166/WQRJ.2019.006

I. L. Breda, L. Ramsay, D. A. Søborg, R. Dimitrova, P. Roslev

{"title":"Manganese removal processes at 10 groundwater fed full-scale drinking water treatment plants","authors":"I. L. Breda, L. Ramsay, D. A. Søborg, R. Dimitrova, P. Roslev","doi":"10.2166/WQRJ.2019.006","DOIUrl":"https://doi.org/10.2166/WQRJ.2019.006","url":null,"abstract":"\u0000 Manganese (Mn) removal in drinking water filters is facilitated by biological and physico-chemical processes. However, there is limited information about the dominant processes for Mn removal in full-scale matured filters with different filter materials over filter depth. Water and filter material samples were collected from 10 full-scale drinking water treatment plants (DWTPs) to characterise the Mn removal processes, to evaluate the potential use of enhancers and to gain further insight on operational conditions of matured filters for the efficient Mn removal. The first-order Mn removal constant at the DWTPs varied from 10−2 to 10−1 min−1. The amount of Mn coating on the filter material grains showed a strong correlation with the amount of iron, calcium and total coating, but no correlation with the concentration of ATP. Inhibition of biological activity showed that Mn removal in matured filters was dominated by physico-chemical processes (59–97%). Addition of phosphorus and trace metals showed limited effect on Mn removal capacity, indicating that the enhancement of Mn removal in matured filters is possible but challenging. There was limited effect of the filter material type (quartz, calcium carbonate and anthracite) on Mn removal in matured filters, which can be relevant information for the industry when assessing filter designs and determining returns of investments.\u0000 This article has been made Open Access thanks to the kind support of CAWQ/ACQE (https://www.cawq.ca).","PeriodicalId":23720,"journal":{"name":"Water Quality Research Journal","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2166/WQRJ.2019.006","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44571975","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Application of waste Delonix regia pods and leaves for the sorption of Pb(II) ions from aqueous solution: kinetic and equilibrium studies 废龙葵豆荚和废龙葵叶吸附水溶液中Pb(II)离子:动力学和平衡研究

IF 2.3 4区环境科学与生态学

Water Quality Research Journal Pub Date : 2019-11-01 DOI: 10.2166/WQRJ.2019.045

B. Babalola, A. O. Babalola, H. O. Adubiaro, O. Ayanda, S. Nelana, E. B. Naidoo

{"title":"Application of waste Delonix regia pods and leaves for the sorption of Pb(II) ions from aqueous solution: kinetic and equilibrium studies","authors":"B. Babalola, A. O. Babalola, H. O. Adubiaro, O. Ayanda, S. Nelana, E. B. Naidoo","doi":"10.2166/WQRJ.2019.045","DOIUrl":"https://doi.org/10.2166/WQRJ.2019.045","url":null,"abstract":"\u0000 The removal of Pb(II) ions from synthetic wastewater using Delonix regia pods and leaves as low-cost biosorbents was investigated. The elemental, morphological and phase characterization of Delonix regia pods and leaves were examined before and after biosorption. The adsorption process at various pH values, contact times, initial concentration of Pb(II) ions and adsorbent doses was studied with the aim of investigating the consequences of these parameters on the process of biosorption. The Langmuir adsorption isotherm provided the best fit for the experimental data of the pods while the Freundlich isotherm gave a better fit for the leaves of Delonix regia. The optimum adsorption capacity of 30.27 mg/g for the pods and 27.60 mg/g for the leaves was achieved when 0.5 g of the adsorbent was mixed with 20 mL of 1,000 mg/L Pb(II) ions solution for 30 min at 21 ± 2 °C and a stirring speed of 18 rpm. The data obtained from the time-dependent experiment of the biosorbents followed the pseudo-second-order kinetic model. This study showed that Delonix regia pods and leaves could be developed further as a low-cost sorbent that could be harnessed for removing Pb from industrial wastewater and thus limit water pollution from point sources.","PeriodicalId":23720,"journal":{"name":"Water Quality Research Journal","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2166/WQRJ.2019.045","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42146361","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Eutrophication 富营养化

IF 2.3 4区环境科学与生态学

Water Quality Research Journal Pub Date : 2019-09-13 DOI: 10.1007/978-3-030-23335-8_15

Claude E. Boyd

引用次数: 0

An Overview of Hydrology and Water Supply 水文与供水概论

IF 2.3 4区环境科学与生态学

Water Quality Research Journal Pub Date : 2019-09-13 DOI: 10.1007/978-3-319-17446-4_2

C. Boyd

引用次数: 3

Nitrogen 氮

IF 2.3 4区环境科学与生态学

Water Quality Research Journal Pub Date : 2019-09-13 DOI: 10.1007/978-3-030-23335-8_13

Claude E. Boyd

引用次数: 2

Sulfur 硫

IF 2.3 4区环境科学与生态学

Water Quality Research Journal Pub Date : 2019-09-13 DOI: 10.1007/978-3-030-23335-8_16

Claude E. Boyd

引用次数: 0

Phosphorus 磷

IF 2.3 4区环境科学与生态学

Water Quality Research Journal Pub Date : 2019-09-13 DOI: 10.1007/978-3-030-23335-8_14

Claude E. Boyd

引用次数: 0

Redox Potential 氧化还原电位

IF 2.3 4区环境科学与生态学

Water Quality Research Journal Pub Date : 2019-09-13 DOI: 10.1007/978-3-030-23335-8_8

Claude E. Boyd

引用次数: 99