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https://www.readbyqxmd.com/read/28724256/first-study-to-explore-the-feasibility-of-applying-microbial-fuel-cells-into-constructed-wetlands-for-cod-monitoring
#1
Lei Xu, Yaqian Zhao, Chuang Fan, Zhiren Fan, Fangchao Zhao
Chemical oxygen demand (COD) is one of the major targets to remove in constructed wetlands (CWs) system. Traditional method for COD measurement is a complex, time-consuming and highly toxic reagents participated procedure. In this study, microbial fuel cell (MFC) was successfully integrated into CW for indicating COD concentration. Results showed that there are two linear correlations between bioelectrical signals (output voltage from MFC) and COD concentration (acetate), which are COD from 0 to 500mg/L (101...
July 1, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28724223/chromium-vi-adsorption-from-wastewater-using-porous-magnetite-nanoparticles-prepared-from-titanium-residue-by-a-novel-solid-phase-reduction-method
#2
Genkuan Ren, Xinlong Wang, Penghui Huang, Benhe Zhong, Zhiye Zhang, Lin Yang, Xiushan Yang
Porous magnetite nanoparticles were successfully synthesized by reduction of titanium residue with pyrite under nitrogen protection, and characterized by X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, energy dispersive X-ray spectroscopy, vibrating sample magnetometer, X-ray photoelectron spectroscope, zeta potential and Brunauer-Emmett-Teller method. The XRD analysis confirmed the formation of porous magnetite nanoparticles with single spinel structure. The SEM image demonstrated that porous magnetite nanoparticles displayed spherical shape with the average diameter of ~51nm...
July 13, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28724105/nitrifying-kinetics-and-the-persistence-of-nitrite-in-the-seine-river-france
#3
M Raimonet, T Cazier, V Rocher, A M Laverman
Although a higher oxidation rate for nitrite than for ammonia generally prevents nitrite accumulation in oxic waters, nitrite concentrations in the Seine River (1-31 μM) exceed European norms. We investigated the kinetics of in situ ammonia- and nitrite-oxidizing communities in river water and wastewater treatment plant (WWTP) effluents to determine the role of pelagic nitrification in the origin and persistence of nitrite downstream of Paris. The main source of nitrite is the major Parisian WWTP, and its persistence, up to tens of kilometers downstream of the plant, is explained by low ammonia and nitrite oxidation rates and high river flow...
May 2017: Journal of Environmental Quality
https://www.readbyqxmd.com/read/28724095/modeling-the-effects-of-onsite-wastewater-treatment-systems-on-nitrate-loads-using-swat-in-an-urban-watershed-of-metropolitan-atlanta
#4
Nahal Hoghooghi, David E Radcliffe, Mussie Y Habteselassie, Jaehak Jeong
Onsite wastewater treatment systems (OWTSs) can be a source of nitrogen (N) pollution in both surface and ground waters. In metropolitan Atlanta, GA, >26% of homes are on OWTSs. In a previous article, we used the Soil Water Assessment Tool to model the effect of OWTSs on stream flow in the Big Haynes Creek Watershed in metropolitan Atlanta. The objective of this study was to estimate the effect of OWTSs, including failing systems, on nitrate as N (NO-N) load in the same watershed. Big Haynes Creek has a drainage area of 44 km with mainly urban land use (67%), and most of the homes use OWTSs...
May 2017: Journal of Environmental Quality
https://www.readbyqxmd.com/read/28723166/automated-3-d-printed-arrays-to-evaluate-genotoxic-chemistry-e-cigarettes-and-water-samples
#5
Karteek Kadimisetty, Spundana Malla, James F Rusling
A novel, automated, low cost, three-dimensional (3-D) printed microfluidic array was developed to detect DNA damage from metabolites of chemicals in environmental samples. The electrochemiluminescent (ECL) detection platform incorporates layer-by-layer (LbL) assembled films of microsomal enzymes, DNA and an ECL-emitting ruthenium metallopolymer in ∼10 nm deep microwells. Liquid samples are introduced into the array, metabolized by the human enzymes, products react with DNA if possible, and DNA damage is detected by ECL with a camera...
May 26, 2017: ACS Sensors
https://www.readbyqxmd.com/read/28722398/fractionation-and-concentration-of-high-salinity-textile-wastewater-using-an-ultra-permeable-sulfonated-thin-film-composite
#6
Meng Li, Yujian Yao, Wen Zhang, Junfeng Zheng, Xuan Zhang, Lianjun Wang
A sulfonated thin-film composite (TFC) nanofiltration membrane was fabricated using 2,2'-benzidinedisulfonic acid (BDSA) and trimesoyl chloride (TMC) on a polyether sulfone substrate by conventional interfacial polymerization. Due to a nascent barrier layer with a loose architecture, the obtained TFC-BDSA-0.2 membrane showed an ultra-high pure water permeability of 48.1 ± 2.1 L-1 m-2 h-1 bar-1, and a considerably low NaCl retention ability of <1.8% over a concentration range of 10-100 g L-1. The membrane, which possesses a negatively charged surface, displayed an excellent rejection of over 99% towards Congo red (CR), and allowed the fast fractionation of high-salinity textile wastewater...
July 19, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28722392/self-assembled-curved-macroporous-photonic-crystal-based-surfactant-detectors
#7
Chien-Fu Chiu, Hui-Ping Tsai, Ying-Chu Chen, Yi-Xuan He, Kun-Yi Andrew Lin, Hongta Yang
Surfactants are extensively used as detergents, dispersants, as well as emulsifiers. Thus, wastewater containing high-concentration surfactants discharged to the environment poses a serious threat to the ecosystem. Unfortunately, conventional detection methods for surfactants suffer from the use of sophisticated instruments, and cannot perform detections for various surfactants by a single analysis. The article reports the development of simple and sensitive surfactant detection using doctor blade coated three-dimensional curved macroporous photonic crystals on a cylindrical rod...
July 19, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28720767/assessment-of-the-occurrence-spatiotemporal-variations-and-geoaccumulation-of-fifty-two-inorganic-elements-in-sewage-sludge-a-sludge-management-revisit
#8
Fidèle Suanon, Qian Sun, Xiaoyong Yang, Qiaoqiao Chi, Sikandar I Mulla, Daouda Mama, Chang-Ping Yu
The limited information about the sludge quality has made its management a top environmental challenge. In the present study, occurrence and the spatiotemporal variations of 52 inorganic elements were investigated in the sludge samples from three wastewater treatment plants (WWTPs) in Xiamen city, China. The results showed, the occurrence of 49 elements with the concentrations in the range of >125-53500 mg kg(-1) dry sludge (DS) for commonly used industrial metals, 1.22-14.0 mg kg(-1) DS for precious metals, and 1...
July 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28720276/arsenic-removal-by-periphytic-biofilm-and-its-application-combined-with-biochar
#9
Ningyuan Zhu, Jianhong Zhang, Jun Tang, Yan Zhu, Yonghong Wu
A biochar and periphyton-based system (BPS) comprising of a biochar column and a periphyton bioreactor was designed to avoid the toxicity issue associated with removing As(III) from wastewater. Results showed that the periphyton can grow when As(III) is less than 5.0mgL(-1). The BPS obtained a high As(III) removal rate (∼90.2-95.4%) at flow rate=1.0mLmin(-1) and initial concentration of As(III)=2.0mgL(-1). About 60% of the As(III) was pre-treated (adsorbed) in the biochar column and the removal of the remaining As(III) was attributed to the periphyton bioreactor...
July 8, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28720275/nitrite-accumulation-in-continuous-flow-partial-autotrophic-denitrification-reactor-using-sulfide-as-electron-donor
#10
Chunshuang Liu, Wenfei Li, Xuechen Li, Dongfeng Zhao, Bin Ma, Yongqiang Wang, Fang Liu, Duu-Jong Lee
The nitrite accumulation in handling nitrate and sulfide-laden wastewater in a continuous-flow upflow anaerobic sludge blanket reactor was studied. At sulfide/nitrate-nitrogen ratio of 1:0.76 and loading rates of 1.2kg-Sm(-3)d(-1) and 0.4kg-Nm(-3)d(-1), the elemental sulfur and nitrite accumulation rates peaked at 90% and 70%, respectively, with Acrobacter, Azoarcus and Thauera presenting the functional strains in the studied reactor. The accumulated nitrite was proposed a promising feedstock for anaerobic ammonia oxidation process...
July 8, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28720176/determination-of-polycyclic-aromatic-hydrocarbons-in-commercial-parenteral-formulations-and-medications-using-high-performance-liquid-chromatography-with-diode-array-detection
#11
Marcia M Barichello, Denise Bohrer, Carine Viana, Leandro M Carvalho, Paulo C Nascimento
HPLC coupled to UV diode array detection (DAD) is proposed for the determination of polycyclic aromatic hydrocarbons (PAHs) in pharmaceutical products for parenteral administration. Because rubber is a possible source of PAHs for these products, samples stored in containers with rubber parts were selected for the analysis. The basis for method optimization was EPA Method 8310, which determines 16 priority PAHs in ground water and wastewater by HPLC using both UV and fluorescence detection. Using DAD, two channels were selected for detection, with one operating at 254 nm for the detection of nine PAHs and the other at 225 nm for the detection of seven PAHs...
July 1, 2017: Journal of AOAC International
https://www.readbyqxmd.com/read/28719853/determination-of-chemical-forms-of-14-c-in-liquid-discharges-from-nuclear-power-plants
#12
I Svetlik, M Fejgl, P P Povinec, T Kořínková, L Tomášková, J Pospíchal, M Kurfiřt, R Striegler, M Kaufmanová
Developments of radioanalytical methods for determination of radiocarbon in wastewaters from nuclear power plants (NPP) with pressurized light water reactors, which would distinguish between the dissolved organic and inorganic forms have been carried out. After preliminary tests, the method was used to process pilot samples from wastewater outlets from the Temelín and Dukovany NPPs (Czech Republic). The results of analysis of pilot water samples collected in 2015 indicate that the instantaneous (14)C releases into the water streams would be about 7...
July 15, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28719770/household-exposure-to-livestock-and-health-in-the-chililab-hdss-cohort-vietnam
#13
Sinh Dang-Xuan, Lauren E MacDonald, Janna M Schurer, Hung Nguyen-Viet, Phuc Pham-Duc
In Vietnam, pigs and poultry are predominantly produced by small-scale farmers, creating challenges for zoonotic disease management. The objective of this study was to characterize practices related to livestock and manure management and to measure association with 3 self-reported health symptoms (coughing, fever, and diarrhea/nausea/vomiting) in a region currently undergoing health transitions. We analyzed cross-sectional survey data collected from a subset (N = 5520) of the Chi Linh Health and Demographic Surveillance System cohort in Chi Linh district, Vietnam...
July 2017: Asia-Pacific Journal of Public Health
https://www.readbyqxmd.com/read/28718056/aeration-control-strategies-to-stimulate-simultaneous-nitrification-denitrification-via-nitrite-during-the-formation-of-aerobic-granular-sludge
#14
Thomas Dobbeleers, Jolien D'aes, Solange Miele, Michel Caluwé, Veerle Akkermans, Dominique Daens, Luc Geuens, Jan Dries
In this study, a sequencing batch reactor (SBR), treating synthetic wastewater (COD/N = 5), was operated in two stages. During stage I, an aeration control strategy based on oxygen uptake rate (OUR) was applied, to accomplish nitrogen removal via nitrite >80%. In stage II, the development of aerobic granular sludge (AGS) was examined while two aeration control strategies (OUR and pH slope) maintained the nitrite pathway and optimized the simultaneous nitrification-denitrification (SND) performance. Stimulation of slow-growing organisms, (denitrifying) polyphosphate-accumulating organisms (D)PAO and (denitrifying) glycogen-accumulating organisms (D)GAO leads to full granulation (at day 200, SVI10 = 47...
July 17, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28718023/two-year-survey-of-specific-hospital-wastewater-treatment-and-its-impact-on-pharmaceutical-discharges
#15
Laure Wiest, Teofana Chonova, Alexandre Bergé, Robert Baudot, Frédérique Bessueille-Barbier, Linda Ayouni-Derouiche, Emmanuelle Vulliet
It is well known that pharmaceuticals are not completely removed by conventional activated sludge wastewater treatment plants. Hospital effluents are of major concern, as they present high concentrations of pharmaceutically active compounds. Despite this, these specific effluents are usually co-treated with domestic wastewaters. Separate treatment has been recommended. However, there is a lack of information concerning the efficiency of separate hospital wastewater treatment by activated sludge, especially on the removal of pharmaceuticals...
July 17, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28718017/occurrence-and-transformations-of-carbon-nitrogen-and-phosphorus-related-to-particle-size-fraction-of-sweet-potato-starch-wastewater-during-hydrolytic-acidification-processes
#16
Haixiao Zhu, Long Qin, Yue Hu, Dongyang Wei, Zibin Hai, Aimin Li, Xianchuan Xie, Chao Han
Sweet potato starch wastewater (SPSW) is an industrial food-processing waste product, which is a significant pollution source due to its high chemical oxygen demand (COD), nitrogen, and phosphorus loads. The influence of hydrolytic acidification (HA) process on C, N, and P as well as other main parameters were evaluated. It is essential to treat these wastewaters with effective methods such as HA, a general pretreatment application. In this study, we investigate the scientific link between the changes of different fractions of C, N, and P with particle size distribution in response to the newly introduced HA process...
July 17, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28716030/modeling-de-novo-granulation-of-anaerobic-sludge
#17
Anna Doloman, Honey Varghese, Charles D Miller, Nicholas S Flann
BACKGROUND: A unique combination of mechanical, physiochemical and biological forces influences granulation during processes of anaerobic digestion. Understanding this process requires a systems biology approach due to the need to consider not just single-cell metabolic processes, but also the multicellular organization and development of the granule. RESULTS: In this computational experiment, we address the role that physiochemical and biological processes play in granulation and provide a literature-validated working model of anaerobic granule de novo formation...
July 17, 2017: BMC Systems Biology
https://www.readbyqxmd.com/read/28715758/defence-strategies-and-antibiotic-resistance-gene-abundance-in-enterococci-under-stress-by-exposure-to-low-doses-of-peracetic-acid
#18
Andrea Turolla, Raffaella Sabatino, Diego Fontaneto, Ester M Eckert, Noemi Colinas, Gianluca Corno, Barbara Citterio, Francesca Biavasco, Manuela Antonelli, Alessandro Mauro, Gianmarco Mangiaterra, Andrea Di Cesare
Peracetic acid (PAA) is an organic compound used efficiently as disinfectant in wastewater treatments. Yet, at low doses it may cause selection; thus, the effect of low doses of PAA on Enterococcus faecium as a proxy of human-related microbial waste was evaluated. Bacteria were treated with increasing doses of PAA (from 0 to 25 mg L(-1) min) and incubated in regrowth experiments under non-growing, limiting conditions and under growing, favorable conditions. The changes in bacterial abundance, in bacterial phenotype (number and composition of small cell clusters), and in the abundance of an antibiotic resistance gene (ARG) was evaluated...
July 8, 2017: Chemosphere
https://www.readbyqxmd.com/read/28715755/adsorption-of-mercury-ii-from-aqueous-solutions-using-fes-and-pyrite-a-comparative-study
#19
Yue Sun, Dan Lv, Jiasheng Zhou, Xiaoxin Zhou, Zimo Lou, Shams Ali Baig, Xinhua Xu
In this study, a comparative evaluation of synthetic FeS and natural pyrite was performed to investigate their adsorptive potentials toward Hg(II) in aqueous system. Characterization analyses such as BET, SEM and TEM suggested that FeS had porous structures with abundant active sites, while pyrite with a hard and smooth surface relied mainly on surface adsorption to immobilize Hg(II). Results of batch tests revealed that FeS offered much greater Hg(II) maximum adsorption capacity (769.2 mg/g) as compared to pyrite (9...
July 11, 2017: Chemosphere
https://www.readbyqxmd.com/read/28715748/fabrication-uniform-hollow-bi2s3-nanospheres-via-kirkendall-effect-for-photocatalytic-reduction-of-cr-vi-in-electroplating-industry-wastewater
#20
Sheng Luo, Fan Qin, Yin'an Ming, Huiping Zhao, Yunling Liu, Rong Chen
Hazardous hexavalent chromium removal from wastewater is an urgent issue in industry environmental pollution. In this work, hollow Bi2S3 nanospheres have been successfully synthesized from unique Bi2O3 porous nanospheres via Kirkendall effect through hydrothermal process. It was found that the sulfur source and the initial Bi2O3 templates played key roles in the formation of the uniform morphologies and structures through an anion exchange process. Compared with other Bi2S3 samples, the synthesized hollow Bi2S3 nanospheres exhibited much enhanced photocatalytic ability for Cr(VI) photoreduction...
July 1, 2017: Journal of Hazardous Materials
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