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https://www.readbyqxmd.com/read/28736905/bacterial-and-fungal-communities-and-contribution-of-physicochemical-factors-during-cattle-farm-waste-composting
#1
Huhe, Chao Jiang, Yanpei Wu, Yunxiang Cheng
During composting, the composition of microbial communities is subject to constant change owing to interactions with fluctuating physicochemical parameters. This study explored the changes in bacterial and fungal communities during cattle farm waste composting and aimed to identify and prioritize the contributing physicochemical factors. Microbial community compositions were determined by high-throughput sequencing. While the predominant phyla in the bacterial and fungal communities were largely consistent during the composting, differences in relative abundances were observed...
July 24, 2017: MicrobiologyOpen
https://www.readbyqxmd.com/read/28735203/grape-stalk-application-for-caffeine-removal-through-adsorption
#2
Rodrigo Portinho, Odivan Zanella, Liliana Amaral Féris
Concern over emerging pollutants presence in water resources is growing, justifying the search for alternative or additional techniques to those applied in conventional water treatment processes. Use of adsorption with agricultural wastes directly as adsorbents or as precursors for activated carbon synthesis is a viable method, combining removal efficiency, low cost and biodegradability of the material applied. This study investigated the employability of grape stalk, a waste from grape industrialization process without effective use, in caffeine removal from aqueous solution...
July 20, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28735181/effects-of-cellulose-degradation-products-on-the-mobility-of-eu-iii-in-repositories-for-low-and-intermediate-level-radioactive-waste
#3
Veronica Diesen, Kerstin Forsberg, Mats Jonsson
The deep repository for low and intermediate level radioactive waste SFR in Sweden will contain large amounts of cellulosic waste materials contaminated with radionuclides. Over time the repository will be filled with water and alkaline conditions will prevail. In the present study degradation of cellulosic materials and the ability of cellulosic degradation products to solubilize and thereby mobilise Eu(III) under repository conditions has been investigated. Further, the possible immobilization of Eu(III) by sorption onto cement in the presence of degradation products has been investigated...
July 6, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28732965/facile-and-cost-effective-preparation-of-pva-modified-calcium-carbonate-nanocomposites-via-ultrasonic-irradiation-application-in-adsorption-of-heavy-metal-and-oxygen-permeation-property
#4
Shadpour Mallakpour, Elham Khadem
This work is focused on the fabrication and determination of physicochemical behaviors of new poly(vinyl alcohol) (PVA) nanocomposites (NCs) containing various contents of calcium carbonate (CC) nanoparticles modified with γ-aminopropyl triethoxy silane (ATS) (henceforth designated as CC-ATS) which could be a crucial treatment for their application as gas barrier to O2 gas and uptake of metal ions in waste waters. Samples were produced through the solution casting method under ultrasound irradiation. Thermal and mechanical performances were also evaluated for all ultrasonically synthesized nanocomposites and the results indicated that thermal and mechanical stability are dramatically enhanced by addition of a small amount of modified CC-ATS within PVA up to 5wt% and higher amounts has low effect on the composite properties...
November 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28728971/a-multi-objective-optimization-approach-for-the-selection-of-working-fluids-of-geothermal-facilities-economic-environmental-and-social-aspects
#5
Juan Martínez-Gomez, Javier Peña-Lamas, Mariano Martín, José María Ponce-Ortega
The selection of the working fluid for Organic Rankine Cycles has traditionally been addressed from systematic heuristic methods, which perform a characterization and prior selection considering mainly one objective, thus avoiding a selection considering simultaneously the objectives related to sustainability and safety. The objective of this work is to propose a methodology for the optimal selection of the working fluid for Organic Rankine Cycles. The model is presented as a multi-objective approach, which simultaneously considers the economic, environmental and safety aspects...
July 17, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28728004/effects-of-aspect-ratio-of-multi-walled-carbon-nanotubes-on-coal-washery-waste-water-treatment
#6
Ahmed Aliyu, Ishaq Kariim, Saka Ambali Abdulkareem
The dependency of adsorption behaviour on the aspect ratio of multi-walled carbon nanotubes (MWCNTs) has been explored. In this study, effect of growth temperature on yield and aspect ratio of MWCNTs by catalytic chemical vapour deposition (CCVD) method is reported. The result revealed that yield and aspect ratio of synthesised MWCNTs strongly depend on the growth temperature during CCVD operation. The resulting MWCNTs were characterized by High Resolution Transmission Electron Microscope (HRTEM), Dynamic Light Scattering (DLS) and X-ray diffraction (XRD) techniques to determine it diameter, hydrodynamic diameter and crystallinity respectively...
July 17, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28726713/a-comprehensive-study-on-adsorption-behavior-of-some-azo-dyes-from-aqueous-solution-onto-different-adsorbents
#7
Nihan Kaya
One of the major environmental problems is the existence of dye materials in water sources. This pollutant must be removed from water by appropriate methods. Although most of these methods are efficient for the treatment of waters contaminated with dye pollutants, they are very costly and commercially unattractive. Adsorption is one of the most popular methods for the removal of dye pollutants from water especially if the sorbent is inexpensive. Sorbents are classified as natural sorbents, commercial sorbents, and the sorbents obtained from industrial and agricultural wastes...
July 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28720419/isolation-of-two-ochrobactrum-sp-strains-capable-of-degrading-the-nootropic-drug-piracetam
#8
Marta Woźniak-Karczewska, Monika Čvančarová, Łukasz Chrzanowski, Boris Kolvenbach, Philippe F-X Corvini, Danuta Cichocka
Piracetam (2-oxo-1-pyrrolidine acetamide) is a popular cognitive enhancer, which has recently been detected in waste and drinking water. Nootropic drugs are designed to affect human metabolism and act on the nervous system, but their environmental effects have yet to be the subject of detailed studies. In this report, we present the efficient biodegradation of the cognitive enhancer, piracetam. Two bacterial strains capable of using this compound as the sole carbon source were isolated and later identified as Ochrobactrum anthropi strain MW6 and Ochrobactrum intermedium strain MW7...
July 15, 2017: New Biotechnology
https://www.readbyqxmd.com/read/28715742/development-of-high-performance-supercapacitor-electrode-derived-from-sugar-industry-spent-wash-waste
#9
Ashesh Mahto, Rajeev Gupta, Krishna Kanta Ghara, Divesh N Srivastava, Pratyush Maiti, Kalpana D, Paul Zavala-Revira, R Meena, S K Nataraj
This study aims at developing supercapacitor materials from sugar and distillery industry wastes, thereby mediating waste disposal problem through reuse. In a two-step process, biomethanated spent wash (BMSW) was acid treated to produce solid waste sludge and waste water with significantly reduced total organic carbon (TOC) and biological oxygen demand (BOD) content. Further, waste sludge was directly calcined in presence of activating agent ZnCl2 in inert atmosphere resulting in high surface area (730-900m(2)g(-1)) carbon of unique hexagonal morphology...
June 23, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28708835/green-and-facile-approach-for-enhancing-the-inherent-magnetic-properties-of-carbon-nanotubes-for-water-treatment-applications
#10
Mohamed Ateia, Christian Koch, Stanislav Jelavić, Ann Hirt, Jonathan Quinson, Chihiro Yoshimura, Matthew Johnson
Current methods for preparing magnetic composites with carbon nanotubes (MCNT) commonly include extensive use of treatment with strong acids and result in massive losses of carbon nanotubes (CNTs). In this study we explore the potential of taking advantage of the inherent magnetic properties associated with the metal (alloy or oxide) incorporated in CNTs during their production. The as-received CNTs are refined by applying a permanent magnet to a suspension of CNTs to separate the high-magnetic fraction; the low-magnetic fraction is discarded with the solvent...
2017: PloS One
https://www.readbyqxmd.com/read/28707885/continuous-and-inexpensive-monitoring-of-non-purgeable-organic-carbon-by-coupling-high-efficiency-photo-oxidation-vapor-generation-to-miniaturized-point-discharge-optical-emission-spectrometry
#11
Shu Zhang, Yunfei Tian, Hongling Yin, Yubin Su, Li Wu, Xiandeng Hou, Chengbin Zheng
Currently, no applicable analyzers are available to accomplish online and continuous monitoring of organic pollution, which is one of the most important factors contributing to water shortages around the world, particularly in developing countries. In this work, a sensitive, miniaturized, inexpensive, on-line and continuous non-purgeable organic carbon (NPOC) analysis system was developed for the continuous monitoring of such organic pollution. This system consists of a specially designed and high efficiency UV photo-oxidation vapor generation (HE-POVG) reactor and a miniaturized, low power (7 W) point discharge microplasma optical emission spectrometer (PD-OES)...
July 14, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28697456/hydrothermal-carbonization-of-typical-components-of-municipal-solid-waste-for-deriving-hydrochars-and-their-combustion-behavior
#12
Yousheng Lin, Xiaoqian Ma, Xiaowei Peng, Zhaosheng Yu
In this work, five typical components were employed as representative pseudo-components to indirectly complete previous established simulation system during hydrothermal carbonization (HTC) of municipal solid waste. The fuel characteristics and combustion behavior of HTC-derived hydrochars were evaluated. Results clearly illustrated that the energy ranks of hydrochars were upgraded after HTC. For paper and wood, superior combustion performances of their hydrochars could achieve under suitable conditions. While for food, none positive enrichments on combustion loss rate were observed for hydrochars due to its high solubilization and decomposition under hot compressed water...
June 23, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28693674/the-imperative-for-regenerative-agriculture
#13
Christopher J Rhodes
A review is made of the current state of agriculture, emphasising issues of soil erosion and dependence on fossil fuels, in regard to achieving food security for a relentlessly enlarging global population. Soil has been described as "the fragile, living skin of the Earth", and yet both its aliveness and fragility have all too often been ignored in the expansion of agriculture across the face of the globe. Since it is a pivotal component in a global nexus of soil-water-air-energy, how we treat the soil can impact massively on climate change - with either beneficial or detrimental consequences, depending on whether the soil is preserved or degraded...
March 1, 2017: Science Progress
https://www.readbyqxmd.com/read/28683388/influence-of-biochar-on-heavy-metals-and-microbial-community-during-composting-of-river-sediment-with-agricultural-wastes
#14
Yaoning Chen, Yao Liu, Yuanping Li, Yanxin Wu, Yanrong Chen, Guangming Zeng, Jiachao Zhang, Hui Li
Studies were performed to evaluate influence of biochar addition on physico-chemical process, heavy metals transformation and bacterial community diversity during composting of sediment with agricultural wastes. Simultaneously, the relationships between those parameters including heavy metals and bacterial community compositions were evaluated by redundancy analysis (RDA). The results show that the extraction efficiency of DTPA extractable heavy metals decreased in both piles, and reduced more in pile with biochar addition about 0...
June 20, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28683374/green-technological-approach-to-synthesis-hydrophobic-stable-crystalline-calcite-particles-with-one-pot-synthesis-for-oil-water-separation-during-oil-spill-cleanup
#15
Min-Nan Wu, Jyoti Prakash Maity, Jochen Bundschuh, Che-Feng Li, Chin-Rong Lee, Chun-Mei Hsu, Wen-Chien Lee, Chung-Ho Huang, Chien-Yen Chen
The process of separating oil and water from oil/water mixtures is an attractive strategy to answer the menace caused by industrial oil spills and oily wastewater. In addition, water coproduced during hydrocarbon exploitation, which can be an economic burden and risk for freshwater resources, can become an important freshwater source after suitable water-oil separation. For oil-water separation purposes, considerable attention has been paid to the preparation of hydrophobic-oleophilic materials with modified surface roughness...
July 3, 2017: Water Research
https://www.readbyqxmd.com/read/28678300/flower-stamen-like-porous-boron-carbon-nitride-nanoscrolls-for-water-cleaning
#16
Jiemin Wang, Jian Hao, Dan Liu, Si Qin, Cheng Chen, Chen Yang, Yuchen Liu, Tianyu Yang, Ye Fan, Ying Chen, Weiwei Lei
With the development of the textile industry, commercial organic dyes in waste water are posing as serious issues. Recently, nanomaterials such as porous nanosheets have proven to be efficient in adsorbing the dyes from waste water. However, it still remains a challenge to develop novel nanomaterials as effective absorbents for water cleaning. Herein, we report novel flower stamen-like porous boron carbon nitride (BCN) nanoscrolls for water cleaning. The porous BCN nanoscrolls with a high surface area of 890 m(2) g(-1) display excellent dye adsorption performances up to the adsorption capacity of 620 mg g(-1) of Congo red and 250 mg g(-1) of methylene blue, which have a great potential value for water cleaning applications...
July 20, 2017: Nanoscale
https://www.readbyqxmd.com/read/28674758/dimethyl-sulfide-emission-behavior-from-landfill-site-with-air-and-water-control
#17
Yuyang Long, Siyuan Zhang, Yuan Fang, Yao Du, Weijia Liu, Chengran Fang, Dongsheng Shen
Municipal solid waste landfills are responsible for odors affecting the environment and human health. Dimethyl sulfide (DMS) is one of the major odorous compounds known for its low odor threshold and wide distribution. This study examined the generation, migration and emission of DMS in four artificial landfill-simulating reactors: Reactor 1 and Reactor 2, running under anaerobic and semi-aerobic conditions, respectively, without leachate recirculation; and Reactor 3 and Reactor 4, running under anaerobic and semi-aerobic conditions, respectively, with leachate recirculation...
July 3, 2017: Biodegradation
https://www.readbyqxmd.com/read/28672695/tea-waste-biomass-activated-carbon-electrode-for-simultaneous-removal-of-cr-vi-and-fluoride-by-capacitive-deionization
#18
Mahendra S Gaikwad, Chandrajit Balomajumder
Capacitive deionization is promising less energy based desalination technique to achieve pure water. In the present study microporous activated carbon was prepared from tea waste biomass by chemical and thermal modification. Further TWBAC was used for preparation of the electrode. The TWBAC electrode was applied in the self-made CDI set up for simultaneous removal of hexavalent chromium [Cr(VI)] and fluoride (F) form mixed feed solution of Cr(VI) and F. The performance of TWBAC electrode was found effective for simultaneous removal of Cr(VI) and F from mixed feed solution...
October 2017: Chemosphere
https://www.readbyqxmd.com/read/28668632/urban-sewage-lipids-in-the-suspended-particulate-matter-of-a-coral-reef-under-river-influence-in-the-south-west-gulf-of-mexico
#19
Laura Carreón-Palau, Christopher C Parrish, Horacio Pérez-España
Nutritional quality of suspended particulate matter (SPM) and the degree of human fecal pollution in the largest coral reef system in the southwest Gulf of Mexico were evaluated using lipid classes, fatty acids (FA) and sterols in the dry and rainy seasons. High proportions of triacylglycerols and saturated and monounsaturated FA were detected in the SPM however it was considered poor quality because it had low proportions of highly unsaturated FA which can be used to determine production of marine biogenic material of dietary value to pelagic and benthic organisms...
June 22, 2017: Water Research
https://www.readbyqxmd.com/read/28663049/challenges-and-perspectives-of-metaproteomic-data-analysis
#20
Robert Heyer, Kay Schallert, Roman Zoun, Beatrice Becher, Gunter Saake, Dirk Benndorf
In nature microorganisms live in complex microbial communities. Comprehensive taxonomic and functional knowledge about microbial communities supports medical and technical application such as fecal diagnostics as well as operation of biogas plants or waste water treatment plants. Furthermore, microbial communities are crucial for the global carbon and nitrogen cycle in soil and in the ocean. Among the methods available for investigation of microbial communities, metaproteomics can approximate the activity of microorganisms by investigating the protein content of a sample...
June 26, 2017: Journal of Biotechnology
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