keyword
MENU ▼
Read by QxMD icon Read
search

electronic waste

keyword
https://www.readbyqxmd.com/read/28222375/on-site-nutrient-recovery-and-removal-from-source-separated-urine-by-phosphorus-precipitation-and-short-cut-nitrification-denitrification
#1
Song Yao, Liping Chen, Detian Guan, Zhongguo Zhang, Xiujun Tian, Aimin Wang, Guotian Wang, Qian Yao, Dangcong Peng, Jiuyi Li
Source separation and treatment of human urine have been recognized as a resource-efficient alternative to conventional urban drainage, not only reducing nutrient loads on municipal wastewater treatment plants, but recovering valuable resources from waste streams. In this work, on-site phosphorus (P) recovery from real urine was carried out by using the brine from a reverse osmosis process as the flush water for urine-diverting toilets and a P precipitant, while nitrogen (N) was removed via short-cut nitrification-denitrification (SCND) in a membrane bioreactor (MBR)...
February 16, 2017: Chemosphere
https://www.readbyqxmd.com/read/28219298/microwave-assisted-surface-modification-for-the-separation-of-polycarbonate-from-polymethylmethacrylate-and-polyvinyl-chloride-waste-plastics-by-flotation
#2
Luoluo Huang, Hui Wang, Chongqing Wang, Junyao Zhao, Bo Zhang
Microwave-assisted potassium permanganate modification (MPPM) was used for the flotation separation of polycarbonate (PC) from polyvinyl chloride (PVC) and polymethylmethacrylate (PMMA) waste plastics. The separation process was optimized by investigating the potassium permanganate concentration, treatment time, flotation time and frother concentration. MPPM selectively reduced the flotation recovery of PC. The optimum conditions were determined to be: potassium permanganate concentration, 2 mM/L; treatment time, 1 min; frother concentration, 17...
March 2017: Waste Management & Research
https://www.readbyqxmd.com/read/28218544/direct-imide-formation-from-thiophene-dicarboxylic-acids-gives-expanded-side-chain-selection-in-thienopyrrolediones
#3
Rylan M W Wolfe, John R Reynolds
The synthesis of thienopyrroledione (TPD) has been updated to reduce the number of synthetic steps, remove hazardous and toxic reagents, reduce the amount of byproduct waste, and reduce the use of solvents when unnecessary. Diverse functionalization is possible, introducing 16 examples in yields from 34% to 95%. This reaction scheme was shown to be general for thiophene imides, and a more thorough exploration into side chain engineering is presented with TPD acceptors often used in organic electronic applications...
February 20, 2017: Organic Letters
https://www.readbyqxmd.com/read/28216003/enhanced-volatile-fatty-acids-production-during-anaerobic-digestion-of-lignocellulosic-biomass-via-micro-oxygenation
#4
Chayanon Sawatdeenarunat, Shihwu Sung, Samir Kumar Khanal
A series of batch experiments were conducted to investigate the effects of inoculum type, oxygen (O2) dosage, and incubation time on volatile fatty acids (VFAs) production during anaerobic digestion (AD) of Napier grass (Pennisetum purpureum), a high yielding energy crop. The results showed that anaerobically digested cattle manure (ADCM) as an inoculum generated significantly higher VFAs compared to that of anaerobically digested waste activated sludge (ADWAS) as an inoculum. Additionally, the incubation time of 3days and O2 dosage of 15mL/g volatile solidsadded showed the highest VFAs production when ADCM was used as an inoculum...
February 10, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28215971/characterization-and-inventory-of-pbdd-f-emissions-from-deca-bde-polyethylene-pe-and-metal-blends-during-the-pyrolysis-process
#5
Jun Mei, Xiuji Wang, Xiao Xiao, Ying Cai, Yuhui Tang, Pei Chen
The thermal treatment of waste electrical and electronic equipment (WEEE) is regarded as the largest potential contributor to the environmental release of polybrominated dibenzo-p-dioxins/dibenzofurans (PBDD/Fs). Herein, the pyrolysis of decabromodiphenyl ether (deca-BDE), polyethylene (PE) and metal blends was conducted to investigate the emission characteristics of PBDD/Fs at different thermal treatment conditions. The total yield of polybrominated dibenzo-p-dioxins (PBDDs) was less than that of polybrominated dibenzofurans (PBDFs) during the pyrolysis of the PE matrix and metal blends...
February 16, 2017: Waste Management
https://www.readbyqxmd.com/read/28208630/cocoa-and-grape-seed-byproducts-as-a-source-of-antioxidant-and-anti-inflammatory-proanthocyanidins
#6
María De La Luz Cádiz-Gurrea, Isabel Borrás-Linares, Jesús Lozano-Sánchez, Jorge Joven, Salvador Fernández-Arroyo, Antonio Segura-Carretero
Phenolic compounds, which are secondary plant metabolites, are considered an integral part of the human diet. Physiological properties of dietary polyphenols have come to the attention in recent years. Especially, proanthocyanidins (ranging from dimers to decamers) have demonstrated potential interactions with biological systems, such as antiviral, antibacterial, molluscicidal, enzyme-inhibiting, antioxidant, and radical-scavenging properties. Agroindustry produces a considerable amount of phenolic-rich sources, and the ability of polyphenolic structures to interacts with other molecules in living organisms confers their beneficial properties...
February 10, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28195249/building-blocks-of-the-gipu-italian-group-of-ultrastructural-pathology
#7
V Papa, R Costa, G Cenacchi
The Italian Group of Ultrastructural Pathology, GIPU, is a scientific organization committed to promote the art and science of Electron Microscopy (EM) in the pathology field in Italy, sharing its professional work with a public audience. The history of the GIPU goes back to 1990s when a founder group set up the Italian Group of Ultrastructural Diagnostic (GIDU) in Milan. The central focus of annual meetings was on EM, transmission and scanning one, about interesting cases in which it was instrumental in diagnosis...
June 2016: Pathologica
https://www.readbyqxmd.com/read/28193592/heavy-metal-immobilization-and-microbial-community-abundance-by-vegetable-waste-and-pine-cone-biochar-of-agricultural-soils
#8
Avanthi Deshani Igalavithana, Sung-Eun Lee, Young Han Lee, Daniel C W Tsang, Jörg Rinklebe, Eilhann E Kwon, Yong Sik Ok
In order to determine the efficacy of vegetable waste and pine cone biochar for immobilization of metal/metalloid (lead and arsenic) and abundance of microbial community in different agricultural soils, we applied the biochar produced at two different temperatures to two contaminated soils. Biochar was produced by vegetable waste, pine cone, and their mixture (1:1 ww(-1)) at 200 °C (torrefied biomass) and 500 °C (biochar). Contaminated soils were incubated with 5% (ww(-1)) torrefied biomass or biochar. Sequential extraction, thermodynamic modeling, and scanning electron microscopy equipped with energy-dispersive X-ray spectroscopy were used to evaluate the metal immobilization...
February 3, 2017: Chemosphere
https://www.readbyqxmd.com/read/28192353/removal-of-ammonium-and-heavy-metals-by-cost-effective-zeolite-synthesized-from-waste-quartz-sand-and-calcium-fluoride-sludge
#9
Qian Zhang, Bing Lin, Junming Hong, Chang-Tang Chang
This study focuses on the effectiveness of zeolite (10% CF-Z [0.5]) hydrothermally synthesized from waste quartz sand and calcium fluoride (CF) for ammonium ion and heavy metal removal. Zeolite was characterized through powder X-ray diffraction, Fourier-transform infrared spectroscopy, micromeritics N2 adsorption/desorption analysis, and field emission scanning electron microscopy. The effects of CF addition, Si/Al ratio, initial ammonium concentration, solution pH, and temperature on the adsorption of ammonium on 10% CF-Z (0...
February 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28188331/urnula-sp-an-endophyte-of-dicksonia-antarctica-making-a-fragrant-mixture-of-biologically-active-volatile-organic-compounds
#10
Gary Strobel, Amy Ericksen, Joe Sears, Jie Xie, Brad Geary, Bryan Blatt
Urnula sp. was isolated as an endophyte of Dicksonia antarctica and identified primarily on the basis of its ITS sequence and morphological features. The anamorphic state of the fungus appeared as a hyphomyceteous-like fungus as based on its features in culture and scanning electron microscopy examination of its spores. On potato dextrose agar (PDA), the organism makes a characteristic fragrance resembling peach pie with vanilla overtones. A GC/MS analysis done on the volatile organic compounds (VOCs) of this organism, trapped by carbotrap methodology, revealed over 150 compounds with high MS matching quality being noted for 44 of these...
February 10, 2017: Microbial Ecology
https://www.readbyqxmd.com/read/28181605/synthesis-of-silicon-carbide-nanocrystals-from-waste-polytetrafluoroethylene
#11
Liangbiao Wang, Qinglin Cheng, Hengfei Qin, Zhongchun Li, Zhengsong Lou, Juanjuan Lu, Junhao Zhang, Quanfa Zhou
Resource utilization of waste plastic could solve the problem of environmental pollution and simultaneously relieve energy shortages, achieving sustainable development. In this study, the conversion of waste polytetrafluoroethylene (PTFE) to cubic silicon carbide (SiC) nanoparticles has been described. The structures and morphologies of the obtained SiC were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Furthermore, the FTIR spectrum of the obtained SiC sample suggests that the waste PTFE was completely converted into SiC in our approach...
February 9, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28161335/neodymium-as-the-main-feature-of-permanent-magnets-from-hard-disk-drives-hdds
#12
REVIEW
Daniel Dotto München, Hugo Marcelo Veit
As a way to manage neodymium-iron-boron (NdFeB) magnets wasted in end-of-life hard disk drives (HDDs), a waste characterization is needed prior to a recycling process. Due to their magnetic properties, NdFeB magnets are essential in technological applications nowadays, thus causing an increase in the industrial demand for rare earth metals. However, these metals have a short supply, since they are difficult to obtain from ores, creating a critical market. In this work, a study of the characterization of sintered neodymium-iron-boron magnets was undertaken by qualitatively and quantitatively uncovering the neodymium recovery potential from this type of electronic waste...
February 1, 2017: Waste Management
https://www.readbyqxmd.com/read/28159507/impact-of-the-consort-statement-endorsement-in-the-completeness-of-reporting-of-randomized-clinical-trials-in-restorative-dentistry
#13
Rafael Sarkis-Onofre, Victório Poletto Neto, Maximiliano Sérgio Cenci, Tatiana Pereira-Cenci, David Moher
OBJECTIVES: The aim of this study was to assess if journal endorsement of the CONSORT Statement is associated with improved completeness of reporting of randomized controlled trials (RCTs) in restorative dentistry. MATERIALS AND METHODS: RCTs in restorative dentistry published in two journals that have (Journal of Dentistry and Clinical Oral Investigations) and have not (Operative Dentistry and Journal of Prosthetic Dentistry) endorsed the CONSORT Statement were selected...
January 31, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28159366/application-of-modified-hollow-fiber-liquid-phase-microextraction-in-conjunction-with-chromatography-electron-capture-detection-for-quantification-of-acrylamide-in-waste-water-samples-at-ultra-trace-levels
#14
Hamid Reza Sobhi, Mahnaz Ghambarian, Mohammad Behbahani, Ali Esrafili
Herein, a simple and sensitive method was successfully developed for the extraction and quantification of acrylamide in water samples. Initially, acrylamide was derivatized through a bromination process. Subsequently, a modified hollow-fiber liquid-phase microextraction was applied for the extraction of the brominated acrylamide from a 10-ml portion of an aqueous sample. Briefly, in this method, the derivatized acrylamide (2,3-dibromopropionamide) was extracted from the aqueous sample into a thin layer of an organic solvent sustained in pores of a porous hollow fiber...
March 3, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28152937/elective-chemotherapy-admissions-an-opportunity-to-improve-wait-times
#15
Mary E Dowling
: 240 Background: Chemotherapy wait times are a well-recognized challenge facing cancer hospitals. Recent publications have stated that not only do wait times affect patients but they increase costs and consume hospital resources. Wait times lead to longer lengths of stay and require additional staff attention. Reducing chemotherapy treatment wait times has long been a priority of Sloan Kettering, with this study focusing on inpatient chemo processes. During October and November of 2014, 6 current state observations were performed in chemo nursing verification, chemo pharmacy and an inpatient chemo unit...
March 2016: Journal of Clinical Oncology: Official Journal of the American Society of Clinical Oncology
https://www.readbyqxmd.com/read/28145795/supernumerary-human-hair-cells-signs-of-regeneration-or-impaired-development-a-field-emission-scanning-electron-microscopy-study
#16
Helge Rask-Andersen, Hao Li, Hubert Löwenheim, Marcus Müller, Kristian Pfaller, Annelies Schrott-Fischer, Rudolf Glueckert
BACKGROUND: Current attempts to regenerate cochlear sensorineural structures motivate further inspection of the human organ of hearing. Here, we analyzed the supernumerary inner hair cell (sIHC), a possible sign of regeneration and cell replacement. METHODS: Human cochleae were studied using field emission scanning electron microscopy (FESEM; maximum resolution 2 nm) obtained from individuals aged 44, 48, and 58 years with normal sensorineural pure-tone average (PTA) thresholds (PTA <20 dB)...
February 1, 2017: Upsala Journal of Medical Sciences
https://www.readbyqxmd.com/read/28131042/speciation-and-leaching-of-trace-metal-contaminants-from-e-waste-contaminated-soils
#17
Jin-Li Cui, Chun-Ling Luo, Chloe Wing-Yee Tang, Ting-Shan Chan, Xiang-Dong Li
Primitive electrical and electronic waste (e-waste) recycling activities have caused serious environmental problems. However, little is known about the speciation and leaching behaviors of metal contaminants at e-waste contaminated sites. This study investigated trace metal speciation/mobilization from e-waste polluted soil through column leaching experiments involving irrigation with rainwater for almost 2.5 years. Over the experimental period, Cu and Zn levels in the porewater were 0.14±0.08mg/L, and 0.16±0...
January 7, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28131039/bioleaching-of-electronic-waste-using-bacteria-isolated-from-the-marine-sponge-hymeniacidon-heliophila-porifera
#18
Enrique E Rozas, Maria A Mendes, Claudio A O Nascimento, Denise C R Espinosa, Renato Oliveira, Guilherme Oliveira, Marcio R Custodio
The bacteria isolated from Hymeniacidon heliophila sponge cells showed bioleaching activity. The most active strain, Hyhel-1, identified as Bacillus sp., was selected for bioleaching tests under two different temperatures, 30°C and 40°C, showing rod-shaped cells and filamentous growth, respectively. At 30°C, the bacteria secreted substances which linked to the leached copper, and at 40°C metallic nanoparticles were produced inside the cells. In addition, infrared analysis detected COOH groups and linear peptides in the tested bacteria at both temperatures...
January 22, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28130136/an-experimental-and-quantum-chemical-study-of-removal-of-utmostly-quantified-heavy-metals-in-wastewater-using-coconut-husk-a-novel-approach-to-mechanism
#19
Reena Malik, Shefali Dahiya, Suman Lata
The present study explores the uptake capacity of low cost agricultural waste i.e.Unmodified Coconut (Cocos nucifera L.) Husk for the removal of heavy metal (Pb(2+), Cu(2+), Ni(2+) and Zn(2+)) ions from industrial wastewater. The effect of various operational parameters such as adsorbent dose, high initial metal concentration (100mg/L-500mg/L), pH, temperature and agitation time on the removal of these ions has been investigated using batch experiments. The results showed that maximum uptake through adsorption occurred at 443...
January 24, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28128932/high-thermoelectric-power-factor-organic-thin-films-through-combination-of-nanotube-multilayer-assembly-and-electrochemical-polymerization
#20
Mario Culebras, Chungyeon Cho, Michelle Krecker, Ryan Smith, Yixuan Song, Clara Gomez, Andres Cantarero, Jaime C Grunlan
In an effort to produce effective thermoelectric nanocomposites with multiwalled carbon nanotubes (MWCNT), layer-by-layer assembly was combined with electrochemical polymerization to create synergy that would produce a high power factor. Nanolayers of MWCNT stabilized with poly(diallyldimethylammonium chloride) or sodium deoxycholate were alternately deposited from water. Poly(3,4-ethylene dioxythiophene) [PEDOT] was then synthesized electrochemically by using this MWCNT-based multilayer thin film as the working electrode...
January 27, 2017: ACS Applied Materials & Interfaces
keyword
keyword
75603
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"