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https://www.readbyqxmd.com/read/27905617/a-novel-ag-i-calix-4-arene-coordination-polymer-for-the-sensitive-detection-and-efficient-photodegradation-of-nitrobenzene-in-aqueous-solution
#1
Lei-Lei Liu, Jing Chen, Cai-Xia Yu, Wen-Xing Lv, Hui-Ying Yu, Xiao-Qing Cui, Lin Liu
Nitrobenzene (NB) is a widespread and highly toxic organic pollutant in water, and consequently its detection and removal have attracted considerable attention. In the present study, we designed and synthesized a novel coordination polymer, [AgL0.5(NO3)]n (1), {L = 25,26,27,28-tetra[(3-pyridylmethyl)oxy]calix[4]arene}, from AgNO3 and a tetra-pyridyl-functionalized calix[4]arene ligand, which possessed a 2D network based on [Ag4L(NO3)4] units. The 1-modified glassy carbon electrode (1/GCE) exhibited good electrocatalytic activity toward the reduction of NB, offering the selective detection of NB in a wide linear range (1-2450 μM) and a low detection limit (0...
December 1, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/27905538/potential-and-optimization-of-two-phase-anaerobic-digestion-of-oil-refinery-waste-activated-sludge-and-microbial-community-study
#2
Qinghong Wang, Ying Liang, Peng Zhao, Qing X Li, Shaohui Guo, Chunmao Chen
Oil refinery waste activated sludge produced from oil wastewater biological treatment is a major industrial sludge. Two-phase anaerobic digestion of oil refinery waste activated sludge was studied for the first time. Thermal pretreatment under 170 °C is effective on sludge solubilization. At the optimum hydrolytic-acidogenic condition which was pH of 6.5, temperature of 55 °C and HRT of 2 days, 2754 mg/L volatile fatty acids (VFAs) were produced and acetic acid and butyric acid were the key components...
December 1, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27905276/salting-the-earth-the-environmental-impact-of-oil-and-gas-wastewater-spills
#3
Lindsey Konkel
No abstract text is available yet for this article.
December 1, 2016: Environmental Health Perspectives
https://www.readbyqxmd.com/read/27903060/satellite-imagery-technology-in-public-health-analysis-of-site-catchment-areas-for-assessment-of-poliovirus-circulation-in-nigeria-and-niger
#4
Marina Takane, Shizu Yabe, Yumiko Tateshita, Yusuke Kobayashi, Akihiko Hino, Kazuo Isono, Hiromasa Okayasu, Ousmane M Diop, Takeo Tadono
Environmental surveillance supplements the surveillance of acute flaccid paralysis by monitoring wastewater for poliovirus circulation. Building on previous work, we analysed wastewater flow to optimise selection and placement of sampling sites with higher digital surface model (DSM) resolution. The newly developed 5-m mesh DSM from the panchromatic, remote-sensing instruments for stereo mapping on-board the Japanese advanced land observing satellite was used to estimate catchment areas and flow of sewage water based on terrain topography...
November 21, 2016: Geospatial Health
https://www.readbyqxmd.com/read/27902427/phenotypic-and-genetic-characterization-of-multi-drug-resistant-staphylococcus-aureus-in-the-tropics-of-southeast-asia
#5
Siti Norayuni Mohd Zulkeflle, Yus Amira Yusaimi, Norio Sugiura, Koji Iwamoto, Masafumi Goto, Motoo Utsumi, Nor'azizi Bin Othman, Zuriati Zakaria, Hirofumi Hara
Antibiotic resistance has become a major public health problem throughout the world. The presence of antibiotic resistant bacteria such as Staphylococcus aureus (S. aureus) and antibiotic resistance genes (ARGs) in hospital wastewater is cause for great concern today. In this study, 276 S. aureus isolates were recovered from hospital wastewater samples in Malaysia. All of the isolates were screened for susceptibility to nine different classes of antibiotics: ampicillin (AMP), ciprofloxacin (CFX), gentamicin (GMN), kanamycin (KMN), erythromycin (ERM), vancomycin (VAN), trimetoprim and sulfamethaxazole (TM-SMZ), chloramphenicol (CMP), tetracycline (TET), and nalidixic acid (NAL)...
November 3, 2016: Microbiology
https://www.readbyqxmd.com/read/27902305/flavobacterium-cloacae-sp-nov-isolated-from-waste-water
#6
Hongming Liu, Peng Lu, Guoping Zhu
A Gram-stain-negative, non-spore-forming, rod-shaped, non-motile bacterium, named wh15T, was isolated from the waste water of a municipal wastewater treatment plant in Wuhu, China. The taxonomic status of the strain was characterized using a polyphasic taxonomic approach. Growth occurred at 15-45 °C (optimum, 25-40 °C), at pH 5.0-8.0 (optimum, pH 7.0) and with 0-4% NaCl (optimum, 1-2%). Phylogenetic analyses based on 16S rRNA gene sequence revealed that strain wh15T was a member of genus Flavobacterium and shared the highest similarity with F...
November 21, 2016: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/27902260/flavobacterium-luticocti-sp-nov-isolated-from-waste-water
#7
Hongming Liu, Peng Lu, Lei Jin, Guoping Zhu
A Gram-stain-negative, non-spore-forming, rod-shaped and non-motile bacterium, named xz20T, was isolated from the waste water of a municipal wastewater treatment plant in Xuzhou, China. The taxonomic status of strain xz20T was characterized using a polyphasic taxonomic approach. Growth occurred at 15-40°C (optimum, 25-37°C), at pH 6.0-8.5 (optimum, pH 7.0) and with 0-3% NaCl (optimum, 1-2%). 16S rRNA gene sequence analysis revealed that strain xz20T was a member of the genus Flavobacterium and shared the highest similarity with F...
November 3, 2016: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/27902215/beggiatoa-leptomitoformis-sp-nov-the-first-freshwater-member-of-the-genus-capable-of-chemolithoautotrophic-growth
#8
Galina Dubinina, Alexander Savvichev, Maria Orlova, Ekaterina Gavrish, Suzanne Verbarg, Margarita Grabovich
A strain of filamentous sulfur bacteria was isolated from freshwater spring contaminated with residential and agricultural wastewater in Moscow region, Russia. According to the results of phylogenetic analysis, strain D-402T belonged to the genus Beggiatoa within the family Beggiatoaceae of the class Gammaproteobacteria. Within the genus Beggiatoa, strain D-402T was most closely related to Beggiatoa alba strains. Strain D-402T had a DNA G+C content 42.1 mol %. The similarity to strain B15LD was 33 %. Predominant fatty acids were С18 : 1 (46...
October 18, 2016: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/27901630/emerging-pollutant-treatments-in-wastewater-cases-of-antibiotics-and-hormones
#9
Erika Méndez, Miguel A González-Fuentes, Georgette Rebollar-Perez, Alia Méndez-Albores, Eduardo Torres
Because of the intensive use of pharmaceutical substances in human life, studies on the detection of these chemical compounds and their metabolites as pollutants in water bodies are continuously reported. Some pharmaceutical agents are associated with adverse effects to aquatic life, even at very low concentrations (ng L(-1) to μg L(-1)). For instance, the presence of antibiotics and hormones has been associated with increasing proliferation of antibiotic resistant pathogens and feminization and masculinization of some aquatic organisms...
November 30, 2016: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/27900721/effect-of-initial-ph-and-ph-adjusted-acid-on-nutrient-recovery-from-hydrolysis-urine-by-combining-acidification-with-evaporation-crystallization
#10
Shanqing Jiang, Xiaochang Wang, Shengjiong Yang, Honglei Shi
Nutrient recovery from human urine is a promising pretreatment of domestic wastewater and provides a sustainable recyclability of nitrogen (N), phosphorus (P), and potassium (K). In this study, we present a method to recover all nutrients from hydrolysis urine (HU) in the form of solid products by combining acidification with evaporation-crystallization. The effect of initial pH (pHinit.) on N retention was investigated, and the optimal pHinit. was further determined by analysis of N retention efficiency. Additionally, crystallization process and product composition based on different pH-adjusted acids were also compared...
November 30, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27900438/start-up-and-bacterial-community-compositions-of-partial-nitrification-in-moving-bed-biofilm-reactor
#11
Tao Liu, Yan-Jun Mao, Yan-Ping Shi, Xie Quan
Partial nitrification (PN) has been considered as one of the promising processes for pretreatment of ammonium-rich wastewater. In this study, a kind of novel carriers with enhanced hydrophilicity and electrophilicity was implemented in a moving bed biofilm reactor (MBBR) to start up PN process. Results indicated that biofilm formation rate was higher on modified carriers. In comparison with the reactor filled with traditional carriers (start-up period of 21 days), it took only 14 days to start up PN successfully with ammonia removal efficiency and nitrite accumulation rate of 90 and 91%, respectively, in the reactor filled with modified carriers...
November 30, 2016: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/27898796/sorption-of-pharmaceuticals-heavy-metals-and-herbicides-to-biochar-in-the-presence-of-biosolids
#12
Daniel A Bair, Fungai N D Mukome, Inna E Popova, Temitope A Ogunyoku, Allie Jefferson, Daoyuan Wang, Sarah C Hafner, Thomas M Young, Sanjai J Parikh
Agricultural practices are increasingly incorporating recycled waste materials, such as biosolids, to provide plant nutrients and enhance soil functions. Although biosolids provide benefits to soil, municipal wastewater treatment plants receive pharmaceuticals and heavy metals that can accumulate in biosolids, and land application of biosolids can transfer these contaminants to the soil. Environmental exposure of these contaminants may adversely affect wildlife, disrupt microbial communities, detrimentally affect human health through long-term exposure, and cause the proliferation of antibiotic-resistant bacteria...
November 2016: Journal of Environmental Quality
https://www.readbyqxmd.com/read/27898334/relative-contribution-of-ammonia-oxidizing-bacteria-and-other-members-of-nitrifying-activated-sludge-communities-to-micropollutant-biotransformation
#13
Yujie Men, Stefan Achermann, Damian E Helbling, David R Johnson, Kathrin Fenner
Improved micropollutant (MP) biotransformation during biological wastewater treatment has been associated with high ammonia oxidation activities, suggesting co-metabolic biotransformation by ammonia oxidizing bacteria as an underlying mechanism. The goal of this study was to clarify the contribution of ammonia oxidizing bacteria to increased MP degradation in nitrifying activated sludge (NAS) communities using a series of inhibition experiments. To this end, we treated a NAS community with two different ammonia oxidation inhibitors, namely octyne (OCT), a mechanistic inhibitor that covalently binds to ammonia monooxygenases, and allylthiourea (ATU), a copper chelator that depletes copper ions from the active center of ammonia monooxygenases...
November 22, 2016: Water Research
https://www.readbyqxmd.com/read/27898329/simultaneous-removal-of-structurally-different-pesticides-in-a-biomixture-detoxification-and-effect-of-oxytetracycline
#14
Alejandra Huete-Soto, Mario Masís-Mora, Verónica Lizano-Fallas, Juan Salvador Chin-Pampillo, Elizabeth Carazo-Rojas, Carlos E Rodríguez-Rodríguez
The biopurification systems (BPS) used for the treatment of pesticide-containing wastewater must present a versatile degrading ability, in order to remove different active ingredients according to the crop protection programs. This work aimed to assay the simultaneous removal of several pesticides (combinations of herbicides/insecticides/fungicides, or insecticides/fungicides) in a biomixture used in a BPS over a period of 115 d, and in the presence of oxytetracycline (OTC), an antibiotic of agricultural use that could be present in wastewater from agricultural pesticide application practices...
November 26, 2016: Chemosphere
https://www.readbyqxmd.com/read/27898316/effects-of-iron-and-calcium-carbonate-on-the-variation-and-cycling-of-carbon-source-in-integrated-wastewater-treatments
#15
Zhao Zhimiao, Song Xinshan, Zhao Yufeng, Xiao Yanping, Wang Yuhui, Wang Junfeng, Yan Denghua
Iron and calcium carbonate were added in wastewater treatments as the adjusting agents to improve the contaminant removal performance and regulate the variation of carbon source in integrated treatments. At different temperatures, the addition of the adjusting agents obviously improved the nitrogen and phosphorous removals. TN and TP removals were respectively increased by 29.41% and 23.83% in AC-100 treatment under 1-day HRT. Carbon source from dead algae was supplied as green microbial carbon source and Fe(2+) was supplied as carbon source surrogate...
November 22, 2016: Bioresource Technology
https://www.readbyqxmd.com/read/27894805/leaching-behavior-of-veterinary-antibiotics-in-animal-manure-applied-soils
#16
Min Pan, L M Chu
Agricultural fields worldwide are being contaminated by the escalating application of veterinary antibiotics (VAs) via animal manure and biosolids applied as fertilizers or of wastewater for irrigation, resulting in soil degradation and damage to the health of terrestrial environments. This paper describes a series of column studies investigating the leaching behavior of five VAs, tetracycline (TC), sulfamethazine (SMZ), norfloxacin (NOR), erythromycin (ERY) and chloramphenicol (CAP), under different simulated rainfall conditions that could occur in agricultural environments...
November 25, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27894757/removal-of-dissolved-sulfides-in-aqueous-solution-by-activated-sludge-mechanism-and-characteristics
#17
Bo-Wen Pang, Cheng-Hong Jiang, Marvin Yeung, Yun Ouyang, Jinying Xi
Activated sludge recycling has been developed as a novel technique to directly prevent volatile sulfides emission from wastewater influents. In this study, mechanisms and characteristics of dissolved sulfides removal in aqueous solution by activated sludge were investigated. When DO content in water was 0.49mg/L, 70% of removed dissolved sulfides were released back from the activated sludge by lowering pH to 1. The SEM/EDS result revealed that removed sulfur was fixed in activated sludge and the XPS result showed that fixed sulfur had an oxidation state of -2...
November 18, 2016: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/27894397/isolation-and-identification-of-culturable-halophilic-bacteria-with-producing-hydrolytic-enzyme-from-incheh-broun-hypersaline-wetland-in-iran
#18
P Zarparvar, M A Amoozegar, H Babavalian, M Reza Fallahian, H Tebyanian, F Shakeri
Incheh Broun hypersaline wetland is located near the border of Turkmenistan in thenorth of Iran. This wetland is notable because of salinity (280g/l) and alteration in pH range (2.8 to 6.8). Eastern part of wetland is affected by wastewater of iodine extraction factory.  Samples were taken from soil, water and salt. Totally, 400 bacterial strains were isolated of which 194 strains were Gram-positive bacilli, 184 strains were Gram-negative rod and 22 strains were Gram-positive cocci. According to phylogenetic analysis of 16S rRNA, selected strains were placed in three taxonomic phyla including Firmicutes, Actinobacteria and Gammaproteobacteria...
October 31, 2016: Cellular and Molecular Biology
https://www.readbyqxmd.com/read/27894054/immunolocalization-of-metallothionein-in-hepatocytes-of-guppy-fish-poecilia-reticulata-exposed-to-tannery-effluent-a-biomarker-study
#19
Anulipi Aich, Buddhadeb Chattopadhyay, Subhra Kumar Mukhopadhyay
Composite tannery effluent (TE) contaminated with a load of metals, especially chromium, is used in East Calcutta Wetland Ecosystem (ECW; a Ramsar site of West Bengal; No 1208) after natural stabilization for pisciculture and agriculture. Quantity and synergistic and antagonistic activities of both essential and nonessential metals in the effluents can induce a variety of complex changes in animal physiology. High fish yield and no apparent adverse influence on the fish biosystems thriving under pollutant stress at ECW allowed the practice to thrive sustainably over the last nearly 100 years...
November 25, 2016: Chemosphere
https://www.readbyqxmd.com/read/27894053/ear-like-poly-acrylic-acid-activated-carbon-nanocomposite-a-highly-efficient-adsorbent-for-removal-of-cd-ii-from-aqueous-solutions
#20
Huacai Ge, Jincui Wang
Poly (acrylic acid) modified activated carbon nanocomposite (PAA-AC) was synthesized. The structure and morphology of this nanocomposite were characterized by FTIR, SEM, TEM, XRD and Zeta potential. The adsorption of some heavy metal ions on PAA-AC was studied. The characterization results indicated that PAA-AC was a novel and ear-like nanosheet material with the thickness of about 40 nm and the diameter of about 300 nm. The adsorption results exhibited that the introduction of carboxyl groups into activated carbon evidently increased the uptake for heavy metal ions and the nanocomposite had maximum uptake for Cd(II)...
November 25, 2016: Chemosphere
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