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https://www.readbyqxmd.com/read/28436604/solvent-free-mechanochemical-synthesis-of-nitrogen-doped-nanoporous-carbon-for-electrochemical-energy-storage
#1
Christina Schneidermann, Nicolas Jaeckel, Steffen Oswald, Lars Giebeler, Volker Presser, Lars Borchardt
Nitrogen-doped nanoporous carbons have been synthesized by a solvent-free mechanochemically-induced one-pot synthesis. This facile approach involves the mechanochemical treatment and carbonization of three solid materials: potassium carbonate, urea, and lignin, which is a waste product from pulp industry. The resulting nitrogen-doped porous carbons offer a very high specific surface area up to 3000 m2 g-1 and large pore volume up to 2 cm3 g-1. The mechanochemical reaction and the impact of activation and functionalization are investigated by nitrogen- and water physisorption and high-resolution X-ray photoelectron spectroscopy (XPS)...
April 24, 2017: ChemSusChem
https://www.readbyqxmd.com/read/28434529/stochastic-multicomponent-reactive-transport-analysis-of-low-quality-drainage-release-from-waste-rock-piles-controls-of-the-spatial-distribution-of-acid-generating-and-neutralizing-minerals
#2
Daniele Pedretti, K Ulrich Mayer, Roger D Beckie
In mining environmental applications, it is important to assess water quality from waste rock piles (WRPs) and estimate the likelihood of acid rock drainage (ARD) over time. The mineralogical heterogeneity of WRPs is a source of uncertainty in this assessment, undermining the reliability of traditional bulk indicators used in the industry. We focused in this work on the bulk neutralizing potential ratio (NPR), which is defined as the ratio of the content of non-acid-generating minerals (typically reactive carbonates such as calcite) to the content of potentially acid-generating minerals (typically sulfides such as pyrite)...
April 12, 2017: Journal of Contaminant Hydrology
https://www.readbyqxmd.com/read/28433819/environmentally-and-economically-efficient-utilization-of-coal-processing-waste
#3
Margarita A Dmitrienko, Pavel A Strizhak
High concentrations of hazardous anthropogenic emissions (sulfur, nitrogen and carbon oxides) from solid fuel combustion in coal burning plants cause environmental problems that have been especially pressing over the last 20-30 years. A promising solution to these problems is a switch from conventional pulverized coal combustion to coal-water slurry fuel. In this paper, we pay special attention to the environmental indicators characterizing the combustion of different coal ranks (gas, flame, coking, low-caking, and nonbaking coals) and coal-water slurry fuels based on the coal processing waste - filter cakes...
April 20, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28414913/lca-harmonization-and-soil-science-rankings-results-on-food-waste-management-methods
#4
Jeffrey Morris, Sally L Brown, Matthew Cotton, H Scott Matthews
This study reviewed 147 life cycle studies, with 28 found suitable for harmonizing food waste management methods' climate and energy impacts. 80 scientific soil productivity studies were assessed to rank management method soil benefits. Harmonized climate impacts per kilogram (kg) food waste range from -0.20 kg of carbon dioxide equivalents (CO2e) for anaerobic digestion (AD) to 0.38 kg CO2e for landfill gas-to-energy (LFGTE). Aerobic composting (AC) is -0.10 kg CO2e. In-sink grinding (ISG) via a food waste disposer and flushing for management with other sewerage at a wastewater treatment plant emits 0...
April 17, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28401386/a-comprehensive-review-on-removal-of-arsenic-using-activated-carbon-prepared-from-easily-available-waste-materials
#5
Monoj Kumar Mondal, Ravi Garg
Arsenic contamination in water bodies is a serious problem and causes various health problems due to which US Environment Protection Agency (USEPA) set its maximum permissible limit of 10 ppb. The present review article starts with the removal of toxic arsenic using adsorbents prepared from easily available waste materials. Adsorbent either commercial or low-cost adsorbent can be used for arsenic removal but recent research was focused on the low-cost adsorbent. Preparation and activation of various adsorbents were discussed...
April 11, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28398534/filth-fly-activity-associated-with-composted-and-noncomposted-beef-cadavers-and-laboratory-studies-on-volatile-organic-compounds
#6
T R Dubie, J L Talley, J B Payne, A W Wayadande, J Dillwith, C Richards
Commercial livestock facilities are faced with the challenge of managing large amounts of waste including manure and animal mortalities. One method of disposing of dead animals is composting. The cadavers are enveloped in carbon material that creates a barrier between the dead tissue and the surrounding environment. Dead tissue can release materials that not only contaminate the soil but also the groundwater and nearby surface water. Animal cadaver composting is designed to facilitate decomposition without the aid of carrion-feeding insects and reduce the presence of common pathogens associated with animal waste and dead tissue...
April 8, 2017: Journal of Medical Entomology
https://www.readbyqxmd.com/read/28395163/electrochemical-preparation-of-activated-graphene-oxide-for-the-simultaneous-determination-of-hydroquinone-and-catechol
#7
Murugan Velmurugan, Natarajan Karikalan, Shen-Ming Chen, Yi-Hui Cheng, Chelladurai Karuppiah
This paper describes the electrochemical preparation of highly electrochemically active and conductive activated graphene oxide (aGO). Afterwards, the electrochemical properties of aGO was studied towards the simultaneous determination of hydroquinone (HQ) and catechol (CC). This aGO is prepared by the electrochemical activation of GO by various potential treatments. The resultant aGOs are examined by various physical and electrochemical characterizations. The high potential activation (1.4 to -1.5) process results a highly active GO (aGO1), which manifest a good electrochemical behavior towards the determination of HQ and CC...
March 31, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28391459/preparation-characterization-and-dye-removal-study-of-activated-carbon-prepared-from-palm-kernel-shell
#8
Juan Rafael García, Ulises Sedran, Muhammad Abbas Ahmad Zaini, Zainul Akmar Zakaria
Palm oil mill wastes (palm kernel shell (PKS)) were used to prepare activated carbons, which were tested in the removal of colorants from water. The adsorbents were prepared by 1-h impregnation of PKS with ZnCl2 as the activating agent (PKS:ZnCl2 mass ratios of 1:1 and 2:1), followed by carbonization in autogenous atmosphere at 500 and 550 °C during 1 h. The characterization of the activated carbons included textural properties (porosity), surface chemistry (functional groups), and surface morphology. The dye removal performance of the different activated carbons was investigated by means of the uptake of methylene blue (MB) in solutions with various initial concentrations (25-400 mg/L of MB) at 30 °C, using a 0...
April 8, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28384612/a-review-on-thermal-and-catalytic-pyrolysis-of-plastic-solid-waste-psw
#9
REVIEW
S M Al-Salem, A Antelava, A Constantinou, G Manos, A Dutta
Plastic plays an important role in our daily lives due to its versatility, light weight and low production cost. Plastics became essential in many sectors such as construction, medical, engineering applications, automotive, aerospace, etc. In addition, economic growth and development also increased our demand and dependency on plastics which leads to its accumulation in landfills imposing risk on human health, animals and cause environmental pollution problems such as ground water contamination, sanitary related issues, etc...
April 3, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28384348/de-novo-transcriptome-analysis-of-the-excretory-tubules-of-carausius-morosus-phasmatodea-and-possible-functions-of-the-midgut-appendices
#10
Matan Shelomi
The Malpighian tubules are the insect excretory organs, responsible for ion and water homeostasis and elimination of nitrogenous wastes. Post-genomic assays suggest they also metabolize and detoxify xenobiotic compounds and have antimicrobial properties. The Phasmatodea have an additional, unique set of excretory organs referred to predominantly as midgut appendices. Their function and how it compares to phasmid and other insect Malpighian tubules is unknown. Hypotheses include carbonic anhydrase activity, calcium and metal cation sequestration, and xenobiotic transport...
2017: PloS One
https://www.readbyqxmd.com/read/28383818/preparation-of-a-magnetic-porous-carbon-with-hierarchical-structures-from-waste-biomass-for-the-extraction-of-some-carbamates
#11
Yao Wang, Ruiyang Ma, Ruobai Xiao, Qiuhua Wu, Chun Wang, Zhi Wang
In this study, corn stalk was used to synthesize a magnetic adsorbent by pyrolysis together with KHCO3 as the chemical activator and iron(III) salt as the magnetic reagent. The characterization by scanning electron microscopy, transmission electron microscopy and N2 adsorption-desorption analysis showed that the magnetic carbon adsorbent had a structure of hierarchical pores with a high specific surface area. To evaluate its adsorption performance, the adsorbent was used for the extraction of carbamates pesticides (propoxur, isoprocarb and fenobucarb) from water and zucchini samples before high-performance liquid chromatography analysis...
April 6, 2017: Journal of Separation Science
https://www.readbyqxmd.com/read/28372833/chemical-toxicity-and-ecotoxicity-evaluation-of-tannery-sludge-stabilized-with-ladle-furnace-slag
#12
E Pantazopoulou, A Zouboulis
In this study, the stabilization of tannery sludge, which produced during the physico-chemical treatment of tannery wastewaters, was examined by the addition of ladle furnace slag. Moreover, the simultaneous addition of organoclay and ladle furnace slag for the stabilization of tannery sludge was also examined. Chromium and dissolved organic carbon in the leachate of raw tannery sludge, using the EN 12457-2 standard leaching test, were found to exceed the limit values for disposal in non-hazardous and even in hazardous waste landfills, according to the EU Decision 2003/33/EC...
March 31, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28365346/efficient-removal-of-lead-from-solution-by-celery-derived-biochars-rich-in-alkaline-minerals
#13
Tao Zhang, Xiaoxiao Zhu, Lingna Shi, Jianfa Li, Saijun Li, Jinhong Lü, Yimin Li
Biochars were produced from celery biomass by slow pyrolysis at 350 and 500°C, and featured by high content of alkaline minerals namely salts of alkali and alkaline earth metals. The biochars' efficiency on removing Pb(2+) from solution was investigated, and two biochars derived from celery stalk (StC350 and StC500) showed higher Pb(2+) sorption capacity (288 and 304mg/g) than most biochars reported previously. The sorption mechanisms involving precipitation, cation exchange and surface complexation are related to three biochar fractions namely water-soluble matter, acid-soluble substances and insoluble organic carbon...
March 22, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28353103/the-geochemical-release-feature-of-tl-in-tl-rich-pyrite-mine-wastes-a-long-term-leaching-test
#14
Jinwen Li, Nan Chen, Ivy Rajan, Zhehua Sun, Huiming Wu, Diyun Chen, Lingjun Kong
Identifying and revealing the geochemical behaviour of Tl during mine waste weathering are very important to assess the potential environmental impact of Thallium (Tl) from open mine-waste piles. Herein, two methods including the modified BCR sequential extraction and the long-term humidity cell tests (HCT) were employed to understand the Tl chemical fractions and to stimulate intense chemical weathering process, respectively. The results from BCR sequential extraction showed that the Tl concentration in the studied sample was 18...
March 28, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28351642/inter-laboratory-validation-of-a-thin-film-microextraction-technique-for-determination-of-pesticides-in-surface-water-samples
#15
Hamed Piri-Moghadam, Emanuela Gionfriddo, Angel Rodriguez-Lafuente, Jonathan J Grandy, Heather L Lord, Terry Obal, Janusz Pawliszyn
The primary goal of the present study is the inter-laboratory evaluation of a thin film microextraction (TFME) technique to be used as an alternative approach to liquid-liquid extraction (LLE). Polydimethylsiloxane/divinylbenzene (PDMS/DVB) and PDMS/DVB-carbon mesh supported membranes were used for the extraction of 23 targeted pesticides, while a thermal desorption unit (TDU) was employed to transfer these analytes to a GC/MS instrument for separation and detection. After optimization of the most critical parameters, both membranes were capable of achieving limits of detection (LOD) in the low ng L(-1) range while demonstrating excellent robustness, withstanding up to 100 extractions/desorption cycles...
April 29, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28342340/cellulose-decomposition-and-larval-biomass-production-from-the-co-digestion-of-dairy-manure-and-chicken-manure-by-mini-livestock-hermetia-illucens-l
#16
Kashif Ur Rehman, Minmin Cai, Xiaopeng Xiao, Longyu Zheng, Hui Wang, Abdul Aziz Soomro, Yusha Zhou, Wu Li, Ziniu Yu, Jibin Zhang
World trends toward the modern dairies intensification on large production units cause massive animal manure production and accumulation. Improper handling of manure produced by industrial farm operation greatly deteriorates the major environmental media including air, water and soil. The black soldier fly utilizes organic waste and converts it into larvae biomass to be used as livestock feed and into residues to be used as bio-fertilizer. However, due to the high ratio of cellulose, hemicellulose and lignin in dairy manure, this conversion is difficult...
March 22, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28337624/geochemical-behavior-of-ultramafic-waste-rocks-with-carbon-sequestration-potential-a-case-study-of-the-dumont-nickel-project-amos-qu%C3%A3-bec
#17
El Hadji Babacar Kandji, Benoit Plante, Bruno Bussière, Georges Beaudoin, Pierre-Philippe Dupont
The geochemical behavior of ultramafic waste rocks and the effect of carbon sequestration by these waste rocks on the water drainage quality were investigated using laboratory-scale kinetic column tests on samples from the Dumont Nickel Project (RNC Minerals, QC, Canada). The test results demonstrated that atmospheric CO2 dissolution induced the weathering of serpentine and brucite within the ultramafic rocks, generating high concentrations of Mg and HCO3(-) with pH values ranging between 9 and 10 in the leachates that promote the precipitation of secondary Mg carbonates...
March 23, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28334620/supercritical-water-oxidation-of-oil-based-drill-cuttings
#18
Zhong Chen, Zeliang Chen, Fengjun Yin, Guangwei Wang, Hongzhen Chen, Chunlan He, Yuanjian Xu
Oil-based drill cuttings (OBDC) are a typical hazardous solid waste that arises from drilling operations in oil and gas fields. The supercritical water oxidation (SCWO) of OBDC was comprehensively investigated in a batch reactor under the conditions of various oxygen coefficients (OC, 1.5-3.5), temperatures (T, 400-500°C) and reaction times (t, 0.5-10min). Preheating experiments indicated that most of the organic compounds in the initial OBDC sample were distributed within gaseous, oil, aqueous and solid phases, with no more than 9...
March 9, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28330194/exploited-application-of-sulfate-reducing-bacteria-for-concomitant-treatment-of-metallic-and-non-metallic-wastes-a-mini-review
#19
REVIEW
Ali Hussain, Ali Hasan, Arshad Javid, Javed Iqbal Qazi
A variety of multidimensional anthropogenic activities, especially of industrial level, are contaminating our aquatic and terrestrial environments with a variety of metallic and non-metallic pollutants. The metallic and non-metallic pollutants addressed specifically in this review are heavy metals and various compound forms of sulfates, respectively. Direct and indirect deleterious effects of the both types of pollutants to all forms of life are well-known. The treatment of such pollutants is therefore much necessary before their final discharge into the environment...
December 2016: 3 Biotech
https://www.readbyqxmd.com/read/28301612/anoxia-stimulates-microbially-catalyzed-metal-release-from-animas-river-sediments
#20
Casey M Saup, Kenneth H Williams, Lucía Rodríguez-Freire, José M Cerrato, Michael D Johnston, Michael J Wilkins
The Gold King Mine spill in August 2015 released 11 million liters of metal-rich mine waste to the Animas River watershed, an area that has been previously exposed to historical mining activity spanning more than a century. Although adsorption onto fluvial sediments was responsible for rapid immobilization of a significant fraction of the spill-associated metals, patterns of longer-term mobility are poorly constrained. Metals associated with river sediments collected downstream of the Gold King Mine in August 2015 exhibited distinct presence and abundance patterns linked to location and mineralogy...
April 19, 2017: Environmental Science. Processes & Impacts
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