journal
MENU ▼
Read by QxMD icon Read
search

Water Research

journal
https://www.readbyqxmd.com/read/28822815/enrichment-of-highly-settleable-microalgal-consortia-in-mixed-cultures-for-effluent-polishing-and-low-cost-biomass-production
#1
Yuansheng Hu, Xiaodi Hao, Mark van Loosdrecht, Huiqin Chen
Microalgae cultivation is a promising technology for integrated effluent polishing and biofuel production, but poor separability of microalgal cells hinders its industrial application. This study intended to selectively enrich settleable microalgal consortia in mixed culture by applying "wash-out" pressure, which was realized by controlling settling time (ST) and volume exchange ratio (VER) in photo-SBRs. The results demonstrated that highly settleable microalgal consortia (settling efficiency>97%; SVI = 17-50 mL/g) could be enriched from indigenous algal cultures developed in WWTP's effluent...
August 15, 2017: Water Research
https://www.readbyqxmd.com/read/28820989/permanganate-bisulfite-pm-bs-conditioning-horizontal-electro-dewatering-hed-of-activated-sludge-effect-of-reactive-mn-iii-species
#2
Xinxin Guo, Yili Wang, Dongsheng Wang
A novel activated sludge (AS) conditioning method through permanganate/bisulfate (PM/BS) process was proposed. The method involved a new conditioner of reactive Mn(III) intermediate. Moreover, a Mn(III) conditioning-horizontal electro-dewatering (Mn(III) C-HED) process was established to improve AS dewatering performance. Underlying mechanisms were unraveled by investigating changes in physicochemical characteristics, scanning electron microscope (SEM) morphology, and transformation of water and organic matters...
August 11, 2017: Water Research
https://www.readbyqxmd.com/read/28810229/photodegradation-of-sulfathiazole-under-simulated-sunlight-kinetics-photo-induced-structural-rearrangement-and-antimicrobial-activities-of-photoproducts
#3
Xi-Zhi Niu, Julie Glady-Croué, Jean-Philippe Croué
Photolysis is a core natural process impacting the fate of some sulfonamide antibiotics in sunlit waters. In this study, sunlight-induced phototransformation of sulfathiazole was investigated. A photolytic quantum yield of 0.079 was obtained in buffered water (pH = 8.0). Different natural organic matter isolates inhibited the photolysis of sulfathiazole by light screening effect. A kinetic model was developed to predict the photodegradation rate of sulfathiazole using the light screening correction factor of the water matrix in the wavelength range of 300-350 nm...
August 9, 2017: Water Research
https://www.readbyqxmd.com/read/28822814/assessment-of-drinking-water-quality-at-the-tap-using-fluorescence-spectroscopy
#4
Masoumeh Heibati, Colin A Stedmon, Karolina Stenroth, Sebastien Rauch, Jonas Toljander, Melle Säve-Söderbergh, Kathleen R Murphy
Treated drinking water may become contaminated while travelling in the distribution system on the way to consumers. Elevated dissolved organic matter (DOM) at the tap relative to the water leaving the treatment plant is a potential indicator of contamination, and can be measured sensitively, inexpensively and potentially on-line via fluorescence and absorbance spectroscopy. Detecting elevated DOM requires potential contamination events to be distinguished from natural fluctuations in the system, but how much natural variation to expect in a stable distribution system is unknown...
August 8, 2017: Water Research
https://www.readbyqxmd.com/read/28810227/determining-the-zone-of-impact-of-norovirus-contamination-in-shellfish-production-areas-through-microbiological-monitoring-and-hydrographic-analysis
#5
Carlos J A Campos, Gregory Goblick, Ron Lee, Ken Wittamore, David N Lees
Norovirus (NoV) contamination of filter feeding bivalve shellfish is a well-recognised human health threat when shellfish are grown in sewage polluted waters. To date, the identification of high risk zones around sewage discharges in shellfish production areas (SPAs) has not been based on NoV data. This study utilised molecular methods for NoV analysis, combined with hydrographic studies, to determine the relationship between NoV concentrations in shellfish and sewage effluent dilution. Cages with mussels and oysters were placed at different distances downstream of sewage discharges in two coastal sites in England...
August 8, 2017: Water Research
https://www.readbyqxmd.com/read/28802135/environmental-drivers-that-influence-microalgal-species-in-fullscale-wastewater-treatment-high-rate-algal-ponds
#6
Donna L Sutherland, Matthew H Turnbull, Rupert J Craggs
In the last decade, studies have focused on identifying the most suitable microalgal species for coupled high rate algal pond (HRAP) wastewater treatment and resource recovery. However, one of the challenges facing outdoor HRAP systems is maintaining microalgal species dominance. By increasing our understanding of the environmental drivers of microalgal community composition within the HRAP environment, it may be possible to manipulate the system in such a way to favour the growth of desirable species. In this paper, we investigate the microalgal community composition in two full-scale HRAPs over a 23-month period...
August 6, 2017: Water Research
https://www.readbyqxmd.com/read/28806704/chiral-pharmaceuticals-a-review-on-their-environmental-occurrence-and-fate-processes
#7
REVIEW
Edmond Sanganyado, Zhijiang Lu, Qiuguo Fu, Daniel Schlenk, Jay Gan
More than 50% of pharmaceuticals in current use are chiral compounds. Enantiomers of the same pharmaceutical have identical physicochemical properties, but may exhibit differences in pharmacokinetics, pharmacodynamics and toxicity. The advancement in separation and detection methods has made it possible to analyze trace amounts of chiral compounds in environmental media. As a result, interest on chiral analysis and evaluation of stereoselectivity in environmental occurrence, phase distribution and degradation of chiral pharmaceuticals has grown substantially in recent years...
August 5, 2017: Water Research
https://www.readbyqxmd.com/read/28802137/development-of-novel-polysulfone-membranes-with-embedded-zirconium-sulfate-surfactant-micelle-mesostructure-for-phosphate-recovery-from-water-through-membrane-filtration
#8
Kenji Furuya, Akira Hafuka, Miho Kuroiwa, Hisashi Satoh, Yoshimasa Watanabe, Hiroshi Yamamura
We prepared novel membranes that could adsorb phosphate from water through membrane filtration for use in a phosphate recovery system. Zirconium sulfate surfactant micelle mesostructure (ZS), which was the phosphate adsorbent, was embedded in a polysulfone matrix and flat sheet ultrafiltration membranes were made by nonsolvent induced phase separation. Scanning electron microscopy showed that the ZS particles existed on both the top surface and in the internal surface of the membrane. Increases in ZS content led to greater pure water flux because of increases in the surface porosity ratio...
August 5, 2017: Water Research
https://www.readbyqxmd.com/read/28802134/investigating-the-features-in-differential-absorbance-spectra-of-nom-associated-with-metal-ion-binding-a-comparison-of-experimental-data-and-td-dft-calculations-for-model-compounds
#9
Mingquan Yan, Xuze Han, Chenyang Zhang
In this study, seven model compounds containing typical functional groups (phenolic and carboxylic groups) present in nature organic matter (NOM) were used to ascertain the nature of the characteristic bands in differential absorbance spectra (DAS) of NOM that are induced by metal ion binding. Some similarities were found between the DAS of the examined model compounds, caffeic acid, ferulic acid, sinapic acid, terephthalic acid, isophthalic acid, esculetin and myricetin and those of NOM. The binding of Cu(II) with carboxylic group might produce two peaks, A1 and A2, while the binding of Cu(II) with phenolic group might produce all four Gaussian peaks, from A1 to A4 displayed in the DAS of NOM...
August 5, 2017: Water Research
https://www.readbyqxmd.com/read/28822343/the-control-of-disinfection-byproducts-and-their-precursors-in-biologically-active-filtration-processes
#10
REVIEW
Chao Liu, Christopher I Olivares, Ameet J Pinto, Chance V Lauderdale, Jess Brown, Meric Selbes, Tanju Karanfil
While disinfection provides hygienically safe drinking water, the disinfectants react with inorganic or organic precursors, leading to the formation of harmful disinfection byproducts (DBPs). Biological filtration is a process in which an otherwise conventional granular filter is designed to remove not only fine particulates but also dissolved organic matters (e.g., DBP precursors) through microbially mediated degradation. Recently, applications of biofiltration in drinking water treatment have increased significantly...
August 4, 2017: Water Research
https://www.readbyqxmd.com/read/28810228/evolution-of-molecular-weight-and-fluorescence-of-effluent-organic-matter-efom-during-oxidation-processes-revealed-by-advanced-spectrographic-and-chromatographic-tools
#11
Zhiqiang Chen, Mo Li, Qinxue Wen, Nanqi Ren
Effluent organic matter (EfOM) is an emerging concern to receiving aquatic environment due to its refractory property. The degradation of EfOM in ozonation and other two advanced oxidation processes (AOPs), UV/H2O2 and UV/persulfate (PS), was investigated in this study. Fluorescence spectra coupled with parallel factor analysis (PARAFAC) and two-dimensional correlation gel permeation chromatography (2D-GPC) were used to track the evolution of EfOM during each oxidation process. Results showed that the degradation of EfOM indicated by dissolved organic carbon (DOC), UV254 and fluorescence components, fitted well with pseudo-first-order kinetic model during the oxidation processes...
August 4, 2017: Water Research
https://www.readbyqxmd.com/read/28802136/the-role-of-sulfate-in-aerobic-granular-sludge-process-for-emerging-sulfate-laden-wastewater-treatment
#12
Weiqi Xue, Tianwei Hao, Hamish R Mackey, Xiling Li, Richard C Chan, Guanghao Chen
Sulfate-rich wastewaters pose a major threat to mainstream wastewater treatment due to the unpreventable production of sulfide and associated shift in functional bacteria. Aerobic granular sludge could mitigate these challenges in view of its high tolerance and resilience against changes in various environmental conditions. This study aims to confirm the feasibility of aerobic granular sludge in the treatment of sulfate containing wastewater, investigate the impact of sulfate on nutrient removal and granulation, and reveal metabolic relationships in the above processes...
August 4, 2017: Water Research
https://www.readbyqxmd.com/read/28787681/hotspots-for-selected-metal-elements-and-microbes-accumulation-and-the-corresponding-water-quality-deterioration-potential-in-an-unchlorinated-drinking-water-distribution-system
#13
Gang Liu, Yu Tao, Ya Zhang, Maarten Lut, Willem-Jan Knibbe, Paul van der Wielen, Wentso Liu, Gertjan Medema, Walter van der Meer
Biofilm formation, loose deposit accumulation and water quality deterioration in drinking water distribution systems have been widely reported. However, the accumulation and distribution of harbored elements and microbes in the different niches (loose deposits, PVC-U biofilm, and HDPE biofilm) and their corresponding potential contribution to water quality deterioration remain unknown. This precludes an in-depth understanding of water quality deterioration and the development of proactive management strategies...
August 4, 2017: Water Research
https://www.readbyqxmd.com/read/28820990/relative-importance-of-humic-and-fulvic-acid-on-ros-generation-dissolution-and-toxicity-of-sulfide-nanoparticles
#14
Enxiang Shang, Yang Li, Junfeng Niu, Yijing Zhou, Tianyu Wang, John Charles Crittenden
In this study, the effect of natural organic matter (NOM) composition (humic acid (HA) or fulvic acid (FA)) on dissolution, reactive oxygen species (ROS) generation, and toxicity of sulfide nanoparticles (NPs) was investigated under UV irradiation. NOM acted as a UV filter or antioxidant, decreasing ROS (O2(-), OH, and (1)O2) generation by WS2 and MoS2 NPs. The higher light-absorbing fractions of HA in NP/HA mixtures and the faster reaction rate of HA with ROS resulted in higher inhibition effect of HA than FA on O2(-) and OH generation by WS2 and MoS2 NPs...
August 3, 2017: Water Research
https://www.readbyqxmd.com/read/28787682/benthic-cyanobacteria-a-source-of-cylindrospermopsin-and-microcystin-in-australian-drinking-water-reservoirs
#15
Virginie Gaget, Andrew R Humpage, Qiong Huang, Paul Monis, Justin D Brookes
Cyanobacteria represent a health hazard worldwide due to their production of a range of highly potent toxins in diverse aquatic environments. While planktonic species have been the subject of many investigations in terms of risk assessment, little is known about benthic forms and their impact on water quality or human and animal health. This study aimed to purify isolates from environmental benthic biofilms sampled from three different drinking water reservoirs and to assess their toxin production by using the following methods: Enzyme-Linked Immunosorbent Assay (ELISA), High-Performance Liquid Chromatography (HPLC), Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS) and quantitative PCR (qPCR)...
August 2, 2017: Water Research
https://www.readbyqxmd.com/read/28822342/responses-of-trophic-structure-and-zooplankton-community-to-salinity-and-temperature-in-tibetan-lakes-implication-for-the-effect-of-climate-warming
#16
Qiuqi Lin, Lei Xu, Juzhi Hou, Zhengwen Liu, Erik Jeppesen, Bo-Ping Han
Warming has pronounced effects on lake ecosystems, either directly by increased temperatures or indirectly by a change in salinity. We investigated the current status of zooplankton communities and trophic structure in 45 Tibetan lakes along a 2300 m altitude and a 76 g/l salinity gradient. Freshwater to hyposaline lakes mainly had three trophic levels: phytoplankton, small zooplankton and fish/Gammarus, while mesosaline to hypersaline lakes only had two: phytoplankton and large zooplankton. Zooplankton species richness declined significantly with salinity, but did not relate with temperature...
August 1, 2017: Water Research
https://www.readbyqxmd.com/read/28820991/robust-evaluation-of-performance-monitoring-options-for-ozone-disinfection-in-water-recycling-using-bayesian-analysis
#17
Guido Carvajal, Amos Branch, Philipp Michel, Scott A Sisson, David J Roser, Jörg E Drewes, Stuart J Khan
Ozonation of wastewater has gained popularity because of its effectiveness in removing colour, UV absorbance, trace organic chemicals, and pathogens. Due to the rapid reaction of ozone with organic compounds, dissolved ozone is often not measurable and therefore, the common disinfection controlling parameter, concentration integrated over contact time (CT) cannot be obtained. In such cases, alternative parameters have been shown to be useful as surrogate measures for microbial removal including change in UV254 absorbance (ΔUVA), change in total fluorescence (ΔTF), or O3:TOC (or O3:DOC)...
August 1, 2017: Water Research
https://www.readbyqxmd.com/read/28787680/effects-of-decreasing-activated-carbon-particle-diameter-from-30%C3%A2-%C3%AE-m-to-140%C3%A2-nm-on-equilibrium-adsorption-capacity
#18
Long Pan, Yuki Nishimura, Hideki Takaesu, Yoshihiko Matsui, Taku Matsushita, Nobutaka Shirasaki
The capacity of activated carbon particles with median diameters (D50s) of >∼1 μm for adsorption of hydrophobic micropollutants such as 2-methylisolborneol (MIB) increases with decreasing particle size because the pollutants are adsorbed mostly on the exterior (shell) of the particles owing to the limited diffusion penetration depth. However, particles with D50s of <1 μm have not been thoroughly investigated. Here, we prepared particles with D50s of ∼30 μm-∼140 nm and evaluated their adsorption capacities for MIB and several other environmentally relevant adsorbates...
August 1, 2017: Water Research
https://www.readbyqxmd.com/read/28800517/efficient-inactivation-of-ms-2-virus-in-water-by-hydrodynamic-cavitation
#19
Janez Kosel, Ion Gutiérrez-Aguirre, Nejc Rački, Tanja Dreo, Maja Ravnikar, Matevž Dular
The aim of this study was to accurately quantify the impact of hydrodynamic cavitation on the infectivity of bacteriophage MS2, a norovirus surrogate, and to develop a small scale reactor for testing the effect of hydrodynamic cavitation on human enteric viruses, which cannot be easily prepared in large quantities. For this purpose, 3 mL scale and 1 L scale reactors were constructed and tested. Both devices were efficient in generating hydrodynamic cavitation and in reducing the infectivity of MS2 virus. Furthermore, they reached more than 4 logs reductions of viral infectivity, thus confirming the scalability of hydrodynamic cavitation for this particular application...
July 31, 2017: Water Research
https://www.readbyqxmd.com/read/28783496/the-transport-of-polycyclic-aromatic-hydrocarbons-during-rainfall-and-snowmelt-in-contrasting-landscapes
#20
Abha Parajulee, Ying Duan Lei, Ajitha Kananathalingam, David S McLagan, Carl P J Mitchell, Frank Wania
Though it has been established that stream concentrations of polycyclic aromatic hydrocarbons (PAHs) in urban watersheds can be much greater than those in less developed watersheds, knowledge of transport mechanisms is lacking, particularly in temperate, Northern climates with seasonal snow packs. We combine high-resolution stream water sampling with air, suspended solid and stream flow monitoring to investigate the source to stream transport of PAHs during rainfall and snowmelt in paired watersheds with contrasting land use...
July 31, 2017: Water Research
journal
journal
21652
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"