Water Quality Research Journal最新文献_第4页

Effect of hydrodynamic condition on algae control based on montmorillonite modified lime-ceramic sand-lake sediments 水动力条件对蒙脱土改性石灰-陶瓷沙湖沉积物抑藻效果的影响

IF 2.3 4区环境科学与生态学

Water Quality Research Journal Pub Date : 2022-07-21 DOI: 10.2166/wqrj.2022.008

Ting Xia, Shihong Wang, Hang Yan, Zaizhuang Gao, Yao Qiu, Fang Yuan, Guang-yong Huang, Jun Zhou

{"title":"Effect of hydrodynamic condition on algae control based on montmorillonite modified lime-ceramic sand-lake sediments","authors":"Ting Xia, Shihong Wang, Hang Yan, Zaizhuang Gao, Yao Qiu, Fang Yuan, Guang-yong Huang, Jun Zhou","doi":"10.2166/wqrj.2022.008","DOIUrl":"https://doi.org/10.2166/wqrj.2022.008","url":null,"abstract":"\u0000 Montmorillonite modified lime-ceramic sand-lake sediment (LC-sediments) was synthesized and its algae removal efficiency was investigated in this study. Montmorillonite not only improved the morphology and surface area of original LC-sediments, but also promoted the algal removal rate due to its inherent properties such as accumulating an electric charge, acting as a flocculant, and displaying a local bridging effect. Based on parameter optimization including the ratio of raw materials, agent dosage, initial algae density, pH and, a determination of overlying water, the effect of hydrodynamic conditions on the algal removal process was researched. Under the optimal condition, the removal rates of turbidity, algae density and chlorophyll a could reach 86, 88 and 68%, respectively. As verified with a response surface model, it was shown that low disturbance (stirring) of the algae could promote algal removal by montmorillonite modified LC-sediment. Furthermore, a water column was utilized to approximatively simulate the flocculation and algae control in shallow lakes. This study solved the problem of reducing the dosage of lake sediment and improving the removal efficiency of algae without causing secondary pollution to the environment. It was expected to provide a certain theoretical basis for clay flocculation-based algae control in a real environment.","PeriodicalId":23720,"journal":{"name":"Water Quality Research Journal","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2022-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46347172","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: 1

Nitrate removal from groundwater using an activated sludge as a source of bacteria 利用活性污泥作为细菌源从地下水中去除硝酸盐

IF 2.3 4区环境科学与生态学

Water Quality Research Journal Pub Date : 2022-07-08 DOI: 10.2166/wqrj.2022.005

Mohammed Amarine, Sarah Jerroumi, B. Lekhlif, Y. Zouheir, Amine Chafik, El Mostafa Mliji, J. Echaabi

{"title":"Nitrate removal from groundwater using an activated sludge as a source of bacteria","authors":"Mohammed Amarine, Sarah Jerroumi, B. Lekhlif, Y. Zouheir, Amine Chafik, El Mostafa Mliji, J. Echaabi","doi":"10.2166/wqrj.2022.005","DOIUrl":"https://doi.org/10.2166/wqrj.2022.005","url":null,"abstract":"In this study, the denitrification of nitrate-contaminated groundwater by the heterotrophic denitrification (HD) method was studied to produce drinking water. Preliminary tests were carried out in a denitrification reactor, consisting of an opaque PVC column filled with a plastic packing, and fed with a synthetic solution based on glycerol, in which activated sludge bacteria were added. The performance of the reactor was monitored by measuring physicochemical parameters such as pH, turbidity, nitrates, and nitrites. This monitoring was carried out for different tests within the same reactor to evaluate the adaptation possibilities of the denitrifying bacteria. At the end of each test when the substrate was exhausted, a new synthetic solution was added to the reactor under discontinuous aeration (aeration period = 1 h). The results obtained showed that the nitrate removal efficiency reached a value of 99.42% after 8 h of treatment depending on the adaptation of the denitrifying bacteria. This experiment also showed that the concentration of produced nitrite depends on the aeration mode and it reached a value below the detection limit in the sequential aeration mode after 12 h of treatment under discontinuous aeration (aeration period = 1 h).","PeriodicalId":23720,"journal":{"name":"Water Quality Research Journal","volume":"73 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2022-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67976110","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: 1

Numerical investigation of the multiphase flow patterns and removal effect in a large dissolved air flotation 大型溶气浮选多相流型及去除效果的数值研究

IF 2.3 4区环境科学与生态学

Water Quality Research Journal Pub Date : 2022-06-20 DOI: 10.2166/wqrj.2022.024

J. Tang, Yun Long, Yu Fu, X. Long, Zuti Zhang

{"title":"Numerical investigation of the multiphase flow patterns and removal effect in a large dissolved air flotation","authors":"J. Tang, Yun Long, Yu Fu, X. Long, Zuti Zhang","doi":"10.2166/wqrj.2022.024","DOIUrl":"https://doi.org/10.2166/wqrj.2022.024","url":null,"abstract":"\u0000 The standard k–ε model coupled with the mixture model was used to study two-phase flow in a large dissolved air flotation (DAF) unit. The numerical results can simulate fairly well the velocity vectors and air volume fraction distribution data of a DAF unit from the literature. The typical DAF structure parameters were analyzed in detail to investigate their predicted influences on the internal flow structure and removal effect. The simulations indicated that the short length of the separation zone was not conducive to the formation of a stratified flow pattern, and the turbulent kinetic energy at the bottom of the separation zone increased as the length decreased. With the increase in the height of the DAF tank, the horizontal flow structure in the separation zone would be disrupted and, the distribution range and the intensity of the turbulence kinetic energy increased. Further analysis showed that the formation of horizontal stratified flow facilitated the removal of bubbles, and the formation of stratified flow is related to the size of the DAF unit. Detailed analyses showed that the reduction of DAF height and the increase of separation zone length were beneficial to improve the bubble removal efficiency. Finally, a theoretical analysis was carried out to study the relationship between DAF parameters and the removal effect. The results revealed that when the horizontal flow structure was not destroyed and stratified flow occurred, the bubble removal efficiency was positively linearly related to the length of the separation zone. The removal efficiency increases as DAF height decreases.","PeriodicalId":23720,"journal":{"name":"Water Quality Research Journal","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2022-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46566616","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: 0

Machine learning for water quality classification 水质分类的机器学习

IF 2.3 4区环境科学与生态学

Water Quality Research Journal Pub Date : 2022-05-30 DOI: 10.2166/wqrj.2022.004

Saleh Y. Abuzir, Yousef S. Abuzir

引用次数: 6

Corrigendum: Water Quality Research Journal 57 (1), 1–19: Methylene blue removal using prepared activated carbon from grape wood wastes: adsorption process analysis and modelling, Seyyed Alireza Mousavi, Davood Shahbazi, Arezoo Mahmoudi and Parastoo Darvishi, doi: 10.2166/wqrj.2021.015 张晓明，张晓明，张晓明，等。活性炭去除葡萄木渣中亚甲基蓝的研究进展[j] .环境科学与技术，2016 (1):1 - 9

IF 2.3 4区环境科学与生态学

Water Quality Research Journal Pub Date : 2022-05-19 DOI: 10.2166/wqrj.2022.001

引用次数: 0

Trace elements, anions, and carbohydrates in the recirculating aquaculture system using woodchip denitrification, constructed wetland, and sand infiltration 利用木片脱氮、人工湿地和沙子渗透的循环水产养殖系统中的微量元素、阴离子和碳水化合物

IF 2.3 4区环境科学与生态学

Water Quality Research Journal Pub Date : 2022-05-16 DOI: 10.2166/wqrj.2022.030

P. Lindholm-Lehto, A. Lindroos, J. Pulkkinen, T. Kiuru, J. Vielma

{"title":"Trace elements, anions, and carbohydrates in the recirculating aquaculture system using woodchip denitrification, constructed wetland, and sand infiltration","authors":"P. Lindholm-Lehto, A. Lindroos, J. Pulkkinen, T. Kiuru, J. Vielma","doi":"10.2166/wqrj.2022.030","DOIUrl":"https://doi.org/10.2166/wqrj.2022.030","url":null,"abstract":"\u0000 A recirculating aquaculture system (RAS) aims to achieve fish production with negligible discharge into the environment. RASs have been applied for fish production in several countries, but nitrate removal is often a limiting factor for production increases. In this study, a pilot-scale RAS (10 tons of fish/year) was connected to a water treatment field which consisted of a denitrifying woodchip bioreactor (9 m × 14 m) filled with birch woodchips (Betula pendula), a constructed wetland (7.5 m × 6 m), and sand infiltration (16 m × 31 m) to achieve high water quality with low-maintenance treatment units. In the constructed wetland, a perennial common reed (Phragmites australis) was used in a well-drained soil for nutrient re-use. Concentrations of different elements, diluted anions, and selected hydrocarbons were monitored and quantified. Some Mn leaching occurred during the sand infiltration stage. However, Mn concentrations decreased towards the end of the experiment. Concentrations of total-Fe increased up to 2.75 mg L−1 and Mn up to 5 mg L−1 in.the sand infiltration stage of the water treatment field, probably due to anoxic conditions and leaching of fine particles. This type of process design offers effective but low-maintenance treatment of circulating water.","PeriodicalId":23720,"journal":{"name":"Water Quality Research Journal","volume":"1 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2022-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42553986","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: 1

Biofilm thickness restraint carriers enhance free nitrous acid inhibition for partial nitritation 生物膜厚度限制载体对部分亚硝化的抑制作用增强

IF 2.3 4区环境科学与生态学

Water Quality Research Journal Pub Date : 2022-05-13 DOI: 10.2166/wqrj.2022.025

Alexander Schopf, M. Christensson, M. Piculell, Xin Tian, R. Delatolla

{"title":"Biofilm thickness restraint carriers enhance free nitrous acid inhibition for partial nitritation","authors":"Alexander Schopf, M. Christensson, M. Piculell, Xin Tian, R. Delatolla","doi":"10.2166/wqrj.2022.025","DOIUrl":"https://doi.org/10.2166/wqrj.2022.025","url":null,"abstract":"\u0000 Ammonia is a deleterious pollutant present in municipal wastewater that can be hazardous if released into the environment. There is a need for the development of novel processes to advance ammonium removal technologies. Partial nitritation (PN) and anaerobic ammonia oxidation (anammox) are modern treatment processes that can be combined to provide energy-efficient ammonia removal; however, these processes have been shown to be challenging to implement as a two-stage system. New methods to achieve steady PN need to be discovered. Free nitrous acid (FNA) exposure has been explored as a possible strategy for achieving PN; however, exposure time and dosage has been varied depending on the treatment system. For biofilm technologies, such as the moving bed biofilm reactor and biofilm characteristics, including biofilm thickness, can cause inconsistent results. Therefore, this study compares defined maximal biofilm thickness with undefined biofilm thickness and their capacity to achieve PN using FNA. This study found that a defined maximal biofilm thickness designed carrier maintained a thin biofilm capable of achieving PN after FNA exposure while the undefined biofilm thickness designed carrier was not suitable for stable PN.","PeriodicalId":23720,"journal":{"name":"Water Quality Research Journal","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2022-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42900881","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: 1

Thin-film nanocomposite forward osmosis membrane for water desalination: synthesis, characterization and performance improvement 用于海水淡化的薄膜纳米复合正向渗透膜:合成、表征及性能改进

IF 2.3 4区环境科学与生态学

Water Quality Research Journal Pub Date : 2022-05-13 DOI: 10.2166/wqrj.2022.034

A. H. Konsowa, H. Z. AbdAllah, S. Nosier, M. G. Eloffy

{"title":"Thin-film nanocomposite forward osmosis membrane for water desalination: synthesis, characterization and performance improvement","authors":"A. H. Konsowa, H. Z. AbdAllah, S. Nosier, M. G. Eloffy","doi":"10.2166/wqrj.2022.034","DOIUrl":"https://doi.org/10.2166/wqrj.2022.034","url":null,"abstract":"\u0000 The major scope of this study is the fabrication and development of a substrate and polyamide rejection layer for an efficient thin-film hydrophilic composite forward osmosis (TFC-FO) membrane. Fabrication of a thin-film nanocomposite forward osmosis membrane employing interfacial polymerization and modification of substrate characteristics using titanium dioxide (TiO2) nanoparticles as additives (TFNC-FO) are studied. Characterizations of the prepared TFC-FO and TFNC-FO membranes were determined. The morphologies of cross-section, upper and bottom surfaces for the TFC-FO and TFNC-FO membranes were studied using scanning electron microscopy (SEM). Energy-dispersive X-ray (EDX) spectroscopy was used to examine the compositions of different elements for both membranes. The hydrophilicity of the prepared TFC-FO and TFNC-FO membranes was investigated using the measurement of the contact angle test. Fourier Transform Infrared (FT-IR) spectrophotometer was used to observe the existing functional groups of the TFC-FO and TFNC-FO membranes. The thermal stability of the membrane was evaluated via thermogravimetric analysis (TGA). The overall performance of TFC-FO membranes was evaluated with and without adding TiO2 nanoparticles through different parameters, such as membrane flux, initial feed concentration, draw solution concentrations, reverse solute fluxes, membranes permeabilities, and finally, the effect of FO membrane orientations. FO membrane performance was successfully enhanced by adding different concentrations of TiO2 nanoparticles from 0.5 to 1.5 wt%. The findings indicated that an increase in the concentration from 0.5 to 1 wt% leads to a clear increase in both the porosity and hydrophilicity of the nanocomposite substrate and consequently, an increase in the water flux. However, further increasing the concentration of TiO2 nanoparticles to more than 1 wt% affects the membrane performance.","PeriodicalId":23720,"journal":{"name":"Water Quality Research Journal","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2022-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46707754","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: 3

Behavior characteristics of phosphorus and capping effect of microbubble flotation to control phosphorus release in the benthic sediment 磷的行为特征及微泡浮选控制海底沉积物磷释放的封盖作用

IF 2.3 4区环境科学与生态学

Water Quality Research Journal Pub Date : 2022-05-13 DOI: 10.2166/wqrj.2022.027

Yong-Ho Choi, Yong-Hoon Jeong, M. Jang, D. Kwak

{"title":"Behavior characteristics of phosphorus and capping effect of microbubble flotation to control phosphorus release in the benthic sediment","authors":"Yong-Ho Choi, Yong-Hoon Jeong, M. Jang, D. Kwak","doi":"10.2166/wqrj.2022.027","DOIUrl":"https://doi.org/10.2166/wqrj.2022.027","url":null,"abstract":"\u0000 Microbubbles were applied to remove phosphorus (P) and improve environmental water conditions on the surface of the benthic sediment in a eutrophic lake. Microbubble flotation (MF) was used to remove P in a laboratory-scale experiment device from the benthic sediment and overlying water field samples. The results of P tracing observation for MF treatment, which were identified based on the mass balance, showed P accumulated at a higher concentration in the floated scum than in the deposited sludge. Furthermore, while the amount of soluble P separated was insignificant, the removal efficiency of soluble P in the floated scum was higher than total P. As an additional effect, P release was suppressed by the injection of microbubbles, which reduced anaerobicization and improved environmental conditions in the overlying water of the lake. We also confirmed that the sludge that settled after flotation separation caused capping, which restrained P release by forming a layer on the surface of the sediment. The direct P flotation separation, provision of oxygen by injected microbubbles, and capping effect of re-deposited sludge are advantages associated with MF, and our results show that field application studies are warranted.","PeriodicalId":23720,"journal":{"name":"Water Quality Research Journal","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2022-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49399234","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: 0

Statistical tools for water quality assessment and monitoring in river ecosystems – a scoping review and recommendations for data analysis 用于河流生态系统水质评估和监测的统计工具——范围审查和数据分析建议

IF 2.3 4区环境科学与生态学

Water Quality Research Journal Pub Date : 2022-02-14 DOI: 10.2166/wqrj.2022.028

Stefan G. Schreiber, Sanja Schreiber, R. Tanna, D. Roberts, T. Arciszewski

{"title":"Statistical tools for water quality assessment and monitoring in river ecosystems – a scoping review and recommendations for data analysis","authors":"Stefan G. Schreiber, Sanja Schreiber, R. Tanna, D. Roberts, T. Arciszewski","doi":"10.2166/wqrj.2022.028","DOIUrl":"https://doi.org/10.2166/wqrj.2022.028","url":null,"abstract":"\u0000 Robust scientific inference is crucial to ensure evidence-based decision making. Accordingly, the selection of appropriate statistical tools and experimental designs is integral to achieve accuracy from data analytical processes. Environmental monitoring of water quality has become increasingly common and widespread as a result of technological advances, leading to an abundance of datasets. We conducted a scoping review of the water quality literature and found that correlation and linear regression are by far the most used statistical tools. However, the accuracy of inferences drawn from ordinary least squares (OLS) techniques depends on a set of assumptions, most prominently: (a) independence among observations, (b) normally distributed errors, (c) equal variances of errors, and (d) balanced designs. Environmental data, however, are often faced with temporal and spatial dependencies, and unbalanced designs, thus making OLS techniques not suitable to provide valid statistical inferences. Generalized least squares (GLS), linear mixed-effect models (LMMs), and generalized linear mixed-effect models (GLMMs), as well as Bayesian data analyses, have been developed to better tackle these problems. Recent progress in the development of statistical software has made these approaches more accessible and user-friendly. We provide a high-level summary and practical guidance for those statistical techniques.","PeriodicalId":23720,"journal":{"name":"Water Quality Research Journal","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2022-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47752747","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: 9