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Water Science and Technology: a Journal of the International Association on Water Pollution Research

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https://www.readbyqxmd.com/read/28726714/performance-of-a-novel-recycling-magnetic-flocculation-membrane-filtration-process-for-tetracycline-polluted-surface-water-treatment
#1
Yufei Wang, Hui Jia, Hongwei Zhang, Jie Wang, Wenjin Liu
A recycling magnetic flocculation membrane filtration (RMFMF) process integrating circulating coagulation, magnetic enhanced flocculation and membrane filtration was investigated for the treatment of surface water micro-polluted by tetracycline, a typical pharmaceutical and personal care product. A bench-scale experiment was conducted and several water quality parameters including turbidity, ultraviolet absorbance at 254 nm (UV254), total organic carbon and tetracycline concentration were evaluated, taking coagulation membrane filtration and magnetic flocculation membrane filtration processes as reference treatments...
July 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28726713/a-comprehensive-study-on-adsorption-behavior-of-some-azo-dyes-from-aqueous-solution-onto-different-adsorbents
#2
Nihan Kaya
One of the major environmental problems is the existence of dye materials in water sources. This pollutant must be removed from water by appropriate methods. Although most of these methods are efficient for the treatment of waters contaminated with dye pollutants, they are very costly and commercially unattractive. Adsorption is one of the most popular methods for the removal of dye pollutants from water especially if the sorbent is inexpensive. Sorbents are classified as natural sorbents, commercial sorbents, and the sorbents obtained from industrial and agricultural wastes...
July 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28726712/constructed-wetland-integrated-microbial-fuel-cell-system-looking-back-moving-forward
#3
Yae Wang, Yaqian Zhao, Lei Xu, Wenke Wang, Liam Doherty, Cheng Tang, Baiming Ren, Jinhui Zhao
In the last 10 years, the microbial fuel cell (MFC) has been extensively studied worldwide to extract energy from wastewater via electricity generation. More recently, a merged technique of embedding MFC into a constructed wetland (CW) has been developed and appears to be increasingly investigated. The driving force to integrate these two technologies lies in the fact that CWs naturally possess a redox gradient (depending on flow direction and wetland depth), which is required by MFCs as anaerobic anode and aerobic cathode chambers...
July 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28726711/the-use-of-constructed-wetlands-for-the-treatment-and-reuse-of-urban-wastewater-for-the-irrigation-of-two-warm-season-turfgrass-species-under-mediterranean-climatic-conditions
#4
Mario Licata, Teresa Tuttolomondo, Claudio Leto, Salvatore La Bella, Giuseppe Virga
Constructed wetlands (CWs) represent low-cost technology for the treatment and reuse of wastewater in urban areas. This study aimed to evaluate the pollutant removal efficiency of a CW system and to assess the effects of irrigation using treated urban wastewater on soil and on two warm-season turf species. The research was carried out in Sicily (Italy) on a pilot-scale horizontal subsurface flow system which was fed with treated urban wastewater following secondary treatment from an activated-sludge wastewater treatment plant...
July 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28726710/using-amine-functionalized-magnetite-hollow-nanospheres-amhns-as-adsorbents-for-heavy-metal-ions
#5
Sen Lin, Lili Liu, Yong Yang, Wei Zhang, Meng Xu, Kuangfei Lin
In this paper, the amine-functionalized magnetite hollow nanospheres (AMHNs), prepared through a facile one-pot synthesis, were used as heavy metal ion adsorbents, whose morphology and physicochemical features were exploring by transmission electron microscopy, vibrating sample magnetometer, X-ray diffraction and Fourier-transform infrared analyses. Its adsorption performances for Pb(2+), Cu(2+), Zn(2+), Ni(2+) and Cd(2+) were studied in detail. The adsorption increased with the increase of initial pH value of the solution and could be obviously affected by ionic strength...
July 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28726709/impact-of-surface-condition-and-roughness-on-sediment-formation-an-experimental-sewer-system-operated-with-real-wastewater
#6
S Berzio, R-L Lange, M Schlüter, S Ulutaş, B Bosseler, M Wichern
Regular sewer cleaning in North Rhine-Westphalia (Germany) generates annual costs of around 50 million Euros. This leads to the question of whether and to what extent sewer cleaning is necessary. To determine the effect of roughness, sewer surface condition and discharge, experiments with real wastewater were performed, using a sewer test track with acrylic glass tubes (DN 300) prepared with abrasive paper and nature stone tiles at the wastewater treatment plant (WWTP) Bochum-Ölbachtal (Ruhrverband, Germany)...
July 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28726708/potential-of-integrated-vertical-and-horizontal-flow-constructed-wetland-with-native-plants-for-sewage-treatment-under-different-hydraulic-loading-rates
#7
Xuan Cuong Nguyen, Dinh Duc Nguyen, Nguyen Thi Loan, Soon Woong Chang
In this study, a pilot-scale integrated constructed wetland with vertical flow (VF) and horizontal flow (HF) in series was designed and investigated to evaluate sewage wastewater treatment capacity. The VF unit was planted with Canna indica and was 1.2 m long, 1.2 m wide, and 1.2 m high; whereas the HF unit contained Colocasia esculenta and was 3.0 m long, 1.0 m wide, and 1.0 m high. The system was operated under different hydraulic loading rates (HLRs) of 0.1, 0.2, and 0.15 m/d. The effluent concentrations differed as HLR changed, and the means were total suspended solids (TSS): 87 mg/L; biological oxygen demand (BOD5): 31 mg/L; chemical oxygen demand (CODCr): 59 mg/L; ammonium nitrogen (NH4-N): 5...
July 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28726707/three-dimensional-eulerian-eulerian-simulation-on-hydrodynamics-in-dissolved-air-flotation-tank-with-different-turbulence-models
#8
Baoqing Deng, Qiong Ding, Daqiang Ge
The Eulerian-Eulerian approach is used to simulate the two phase flow of air and water in a dissolved air flotation (DAF) tank. Unsteady simulation is adopted to obtain the quasi-steady result. The two dimensional model cannot capture the three dimensional feature of flow pattern in the tank. The three dimensional model reproduces the stratification structure observed in the experiment and obtains the satisfactory volume fraction of air bubbles in the separation zone. To account for the turbulence effect, four two-equation turbulence models are evaluated...
July 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28726706/cost-assessment-of-different-routes-for-phosphorus-recovery-from-wastewater-using-data-from-pilot-and-production-plants
#9
A Nättorp, K Remmen, C Remy
Phosphorus (P) recovery from wastewater has considerable potential to supplement limited fossil P reserves. Reliable cost data are essential for investor and policymaker decisions. In this study, investment and operational costs for nine P recovery processes were calculated from the investor's perspective, taking into account all relevant side effects on the sludge treatment or the wastewater treatment plant. The assessment was based on pilot and full-scale data which were thoroughly consolidated and standardized with technical and cost data from the German wastewater-sludge treatment train to enable direct comparison...
July 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28726705/spatiotemporal-distribution-of-nitrogen-and-phosphorus-in-alpine-lakes-in-the-sanjiangyuan-region-of-the-tibetan-plateau
#10
Su-Jin Lu, Jian-Huan Si, Chuan-Ying Hou, Yu-Si Li, Meng-Meng Wang, Xiao-Xia Yan, Meng Xie, Jin-Xu Sun, Bai-Jie Chen, Shu-Sen Li
To provide a theoretical basis for alpine source lake protection, ten samples were taken from each lake annually from 2012 to 2015. Each year, the various species of nitrogen and phosphorus nutrients were measured. The average contents of nitrate nitrogen, ammonia nitrogen, nitrite nitrogen, total phosphorus, and total nitrogen in the four lakes are 0.195-0.0 mg/L, 0.038-0.143 mg/L, 0.004-0.168 mg/L, 0.006-0.740 mg/L, and 0.050-0.547 mg/L, respectively. The total phosphorus contents in Eling Lake, Longbao Lake and Sea Star were higher than Class I water quality standards, and the total nitrogen contents in Eling Lake, Sea Star and Zhaling Lake were higher than Class I water quality standards as well...
July 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28726704/simultaneous-heterotrophic-nitrification-and-aerobic-denitrification-at-high-concentrations-of-nacl-and-ammonia-nitrogen-by-halomonas-bacteria
#11
Te Wang, Jian Li, Ling Hua Zhang, Ying Yu, Yi Min Zhu
To improve the efficiency of simultaneous heterotrophic nitrification and aerobic denitrification (SND) at high concentrations of NaCl and ammonia nitrogen (NH4(+)-N), we investigated the SND characteristics of Halomonas bacteria with the ability to synthesize the compatible solute ectoine. Halomonas sp. strain B01, which was isolated, screened and identified in this study, could simultaneously remove nitrogen (N) by SND and synthesize ectoine under high NaCl conditions. Gene cloning and sequencing analysis indicated that this bacterial genome contains ammonia monooxygenase (amoA) and nitrate reductase (narH) genes...
July 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28726703/high-performance-magnetic-chicken-bone-based-biochar-for-efficient-removal-of-rhodamine-b-dye-and-tetracycline-competitive-sorption-analysis
#12
Akeem Adeyemi Oladipo, Ayodeji Olugbenga Ifebajo, Numrah Nisar, Olusegun Ayoola Ajayi
Magnetic chicken bone-based biochar (MCBB) was successfully prepared and efficiently adsorbed rhodamine-B (RB) dye and tetracycline (TC) in multi-component systems. The magnetisation value, surface area, and pHpzc of the MCBB were found to be 66.5 emu/g, 328 m(2)/g, and 8.3, respectively. RB has higher saturation capacity (96.5 mg/g) and occupies more active sites on MCBB, thus limiting the sorption of TC with lower saturation capacity (63.3 mg/g). Langmuir isotherm suitably describes the sorption process in a single-component system; however, the multi-component system was well fitted to the Sheindorf-Rebhun-Sheintuch model...
July 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28726702/photodegradation-of-the-benzothiostrobin-in-solution-and-on-soil-and-glass-surface
#13
Zihao Zhou, Yu Yang, Zhangyu Zheng, Minghua Wang
The photolytic characteristics of benzothiostrobin were investigated in solution and on soil and glass surface. The main influence factors such as initial concentration, organic solvent and the aqueous environmental substances, including NO2(-), NO3(-), Fe(2+), Fe(3+), H2O2 and turbidity were investigated. Three photodegradation products of benzothiostrobin were identified by ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS). The photodegradation rates of benzothiostrobin increased with decreasing initial concentration of benzothiostrobin...
July 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28726701/sewage-sludge-and-waterworks-sludge-stabilization-in-sludge-treatment-reed-bed-systems
#14
Grazia Masciandaro, Eleonora Peruzzi, Steen Nielsen
In this study, results about sludge stabilization in sludge treatment reed bed (STRB) systems in two different systems, Hanningfield STRB 1 (England), treating waterworks sludge, and Stenlille STRB 2 (Denmark), treating surplus activated sludge, are presented. The study mainly focused on the effectiveness of the STRBs systems in stabilizing sludge organic matter; in fact, parameters correlated to biochemical and chemico-structural properties of organic sludge matter were determined. Dewatering and sludge stabilization were effective in both STRBs, as highlighted by total and volatile dry solids trend...
July 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28726700/adsorption-studies-of-orange-ii-onto-polyaniline-bentonite-nanocomposite
#15
Wenyun Li, Qingwen Lin, Mengfan Gao, Hongzhu Ma
Modification of bentonite is essential for the adsorption of anionic dyes, as its negative surface charge. In this study, polyaniline/bentonite (PAni-Bent) nanocomposite was synthesized by in-situ intercalative polymerization technique and used to remove anionic dye Orange II (ORII) from synthetic wastewater. Its structure was confirmed by X-ray diffraction (XRD), scanning electron microscopy, Fourier-transform infrared spectra and Brunauer-Emmett-Teller specific surface area measurements. The adsorption behaviours of PAni-Bent towards ORII in the single anionic dye wastewater, the cationic/anionic mixture dye wastewater, with or without salt or surfactant, were investigated principally...
July 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28726699/detoxification-of-photo-catalytically-treated-2-chlorophenol-optimization-through-response-surface-methodology
#16
Muhammad Z Ahamd, S Ehtisham-Ul-Haque, Numrah Nisar, Khizar Qureshi, Abdul Ghaffar, Mazhar Abbas, Jan Nisar, Munawar Iqbal
The present study was conducted to degrade and detoxify 2-chlorophenol (2-CP) under UV irradiation in the presence of titanium dioxide (TiO2) and hydrogen peroxide (H2O2). The treatment efficiency was evaluated on the basis of degradation and cytotoxicity reduction as well as biochemical oxygen demand (BOD), chemical oxygen demand (COD) and total organic carbon (TOC) removal. The process variables such as TiO2, pH, UV irradiation time and H2O2 were optimized. Central composite design in combination with response surface methodology was employed to optimize the process variables...
July 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28726698/experimental-study-and-artificial-neural-network-modeling-of-tartrazine-removal-by-photocatalytic-process-under-solar-light
#17
Aicha Sebti, Fatiha Souahi, Faroudja Mohellebi, Sadek Igoud
This research focuses on the application of an artificial neural network (ANN) to predict the removal efficiency of tartrazine from simulated wastewater using a photocatalytic process under solar illumination. A program is developed in Matlab software to optimize the neural network architecture and select the suitable combination of training algorithm, activation function and hidden neurons number. The experimental results of a batch reactor operated under different conditions of pH, TiO2 concentration, initial organic pollutant concentration and solar radiation intensity are used to train, validate and test the networks...
July 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28726697/removing-lead-ions-from-aqueous-solutions-by-the-thiosemicarbazide-grafted-multi-walled-carbon-nanotubes
#18
Ying Zhou, Jingang Yu, Xinyu Jiang
A novel multi-walled carbon nanotubes (MWCNTs) material functionalized with thiosemicarbazide was synthesized successfully and used to remove lead ions from aqueous solutions. The technologies of Fourier Transform Infrared Spectroscopy, scanning electron microscopy and thermal gravimetric analysis were used to characterize the structure and properties of thiosemicarbazide grafted MWCNTs. The adsorption conditions, such as pH, contact time and temperature, were investigated. The results showed pH affected the adsorption process greatly, and the adsorption process reached equilibrium within 60 min...
July 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28726696/a-novel-freeze-protection-strategy-for-shallow-buried-sewer-pipes-temperature-modelling-and-field-investigation
#19
Youen Pericault, Mikael Risberg, Mattias Vesterlund, Maria Viklander, Annelie Hedström
The burial of sewer and water pipes below the maximum ground frost depth can be very costly and laborious in regions with cold winters. If a freeze protection measure is applied, the utility lines can be installed in a shallower trench to reduce the excavation needs. One freeze protection measure, so called heat tracing, consists of supplying heat along the pipes. In this work, the use of 4th generation district heating as a heat tracing solution was investigated at a pilot site in Kiruna, Sweden. The influence of the system on sewer and water pipe temperatures was studied at a snow-free and snow-covered cross section...
July 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28726695/a-combined-reed-bed-freezing-bed-technology-for-septage-treatment-and-reuse-in-cold-climate-regions
#20
C Kinsley, K Kennedy, A Crolla
A combined reed bed-freezing bed (RB-FB) technology was effective at treating septage under Canadian climatic conditions over a 5-year period with average loading rates of 82-104 kg TS/m(2)/y. Varying hydraulic and solid loading rates as well as the increasing sludge cake with time had little to no effect on treatment efficiency, with almost complete removal of organic matter, solids, heavy metals and nutrients. Filtrate concentrations varied significantly between the freeze-thaw and growing seasons for many parameters, although the differences were not important from a treatment or reuse perspective with filtrate quality similar to a low to medium strength domestic wastewater...
July 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
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