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Waste water nitrogen

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https://www.readbyqxmd.com/read/28514712/nitrogen-doped-carbon-dots-derived-from-sargassum-fluitans-as-fluorophore-for-dna-detection
#1
S Godavarthi, K Mohan Kumar, E Vázquez Vélez, A Hernandez-Eligio, M Mahendhiran, N Hernandez-Como, M Aleman, L Martinez Gomez
This work focused on the use of waste seaweed Sargassum fluitans (S. fluitans) as carbon source precursor to prepare nitrogen doped carbon dots (NCDs) by hydrothermal method. High resolution transmission electron microscopic (HR-TEM) studies revealed that the synthesized water soluble NCDs are in the size range of 2-8nm and exhibits excellent fluorescent properties with a quantum yield of 18.2%. Elemental nitrogen in NCDs was evidenced by X-ray photoelectron spectroscopy (XPS) and Fourier transformed infrared spectrum (FT-IR)...
May 10, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28500550/reclamation-of-heavy-metals-from-contaminated-soil-using-organic-acid-liquid-generated-from-food-waste-removal-of-cd-cu-and-zn-and-soil-fertility-improvement
#2
Shijin Dai, Yang Li, Tao Zhou, Youcai Zhao
Food waste fermentation generates complicated organic and acidic liquids with low pH. In this work, it was found that an organic acid liquid with pH 3.28 and volatile low-molecular-weight organic acid (VLMWOA) content of 5.2 g/L could be produced from food wastes after 9-day fermentation. When the liquid-to-solid ratio was 50:1, temperature was 40 °C, and contact time was 0.5-1 day, 92.9, 78.8, and 52.2% of the Cd, Cu, and Zn in the contaminated soil could be washed out using the fermented food waste liquid, respectively...
May 13, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28493156/mini-review-high-rate-algal-ponds-flexible-systems-for-sustainable-wastewater-treatment
#3
REVIEW
P Young, M Taylor, H J Fallowfield
Over the last 20 years, there has been a growing requirement by governments around the world for organisations to adopt more sustainable practices. Wastewater treatment is no exception, with many currently used systems requiring large capital investment, land area and power consumption. High rate algal ponds offer a sustainable, efficient and lower cost option to the systems currently in use. They are shallow, mixed lagoon based systems, which aim to maximise wastewater treatment by creating optimal conditions for algal growth and oxygen production-the key processes which remove nitrogen and organic waste in HRAP systems...
June 2017: World Journal of Microbiology & Biotechnology
https://www.readbyqxmd.com/read/28492328/inhibition-of-radiolytic-molecular-hydrogen-formation-by-quenching-of-excited-state-water
#4
Gregory Peter Horne, Simon M Pimblott, Jay A LaVerne
Comparison of experimental measurements of the yield of molecular hydrogen produced in the gamma radiolysis of water and aqueous nitrate solutions with predictions of a Monte Carlo track chemistry model shows that the nitrate anion scavenging of the hydrated electron, its precursor, and hydrogen atom cannot account for the observed decrease in the yield at high nitrate anion concentrations. Inclusion of the quenching of excited states of water (formed by either direct excitation or reaction of the water radical cation with the precursor to the hydrated electron) by the nitrate anion into the reaction scheme provides excellent agreement between the stochastic calculations and experiment demonstrating the existence of this short-lived species and its importance in water radiolysis...
May 11, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28448168/management-of-textile-wastewater-for-improving-growth-and-yield-of-field-mustard-brassica-campestris-l
#5
Muhammad Yaseen, Muhammad Zahir Aziz, Aqleema Komal, Muhammad Naveed
Disposal of industrial wastewater is a current issue of urbanization. However, this problem can be sorted by using wastewater as alternate source of irrigation after the addition of some amendment. In this way, the problem of disposal of wastewater not only will be resolved but also scarcity of irrigation water can be kept off in future. Current research study was performed to evaluate the influence of different concentration of wastewater along with canal water for enhancing growth and yield of field mustard...
April 27, 2017: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/28436604/solvent-free-mechanochemical-synthesis-of-nitrogen-doped-nanoporous-carbon-for-electrochemical-energy-storage
#6
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/28433819/environmentally-and-economically-efficient-utilization-of-coal-processing-waste
#7
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/28432993/chemical-biological-and-dna-markers-for-tracing-slaughterhouse-effluent
#8
P J Harvey, M P Taylor, H K Handley, S Foster, M R Gillings, A J Asher
Agricultural practices, if not managed correctly, can have a negative impact on receiving environments via waste disposal and discharge. In this study, a chicken slaughter facility on the rural outskirts of Sydney, Australia, has been identified as a possible source of persistent effluent discharge into a peri-urban catchment. Questions surrounding the facility's environmental management practices go back more than four decades. Despite there having never been a definitive determination of the facility's impact on local stream water quality, the New South Wales Environment Protection Authority (NSW EPA) has implemented numerous pollution reduction requirements to manage noise and water pollution at the slaughter facility...
April 19, 2017: Environmental Research
https://www.readbyqxmd.com/read/28412853/nitrogen-behaviour-during-thermal-drying-of-mechanically-dewatered-biosludge-from-pulp-and-paper-industry
#9
Kati Mustonen, Ivan Deviatkin, Jouni Havukainen, Mika Horttanainen
An ongoing call to implement a circular economy is underway in the European Union, and a specific attention has been placed on the forest industry, which seeks additional recycling routes for its side streams, including biosludge. Biosludge is often dried and incinerated, thus wasting the nitrogen contained therein. This paper describes a study in which the release of nitrogen during thermal drying; the impact of the drying temperatures of 130, 180, and 210°C on the mass of ammonia released; and the potential for recovery of nitrogen from biosludge were examined...
April 17, 2017: Environmental Technology
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/28373560/contrasting-nitrogen-and-phosphorus-budgets-in-urban-watersheds-and-implications-for-managing-urban-water-pollution
#11
Sarah E Hobbie, Jacques C Finlay, Benjamin D Janke, Daniel A Nidzgorski, Dylan B Millet, Lawrence A Baker
Managing excess nutrients remains a major obstacle to improving ecosystem service benefits of urban waters. To inform more ecologically based landscape nutrient management, we compared watershed inputs, outputs, and retention for nitrogen (N) and phosphorus (P) in seven subwatersheds of the Mississippi River in St. Paul, Minnesota. Lawn fertilizer and pet waste dominated N and P inputs, respectively, underscoring the importance of household actions in influencing urban watershed nutrient budgets. Watersheds retained only 22% of net P inputs versus 80% of net N inputs (watershed area-weighted averages, where net inputs equal inputs minus biomass removal) despite relatively low P inputs...
April 18, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28364206/the-problem-of-dephosphorization-using-waste-recycling
#12
Elena Smirnova, Mikhail Alexeev
The article considers optimizing methods for wastewater treatment systems. Nutrients (nitrogen and phosphorus) are discharged from the river basin of the northwest Russia. Disruption of ecological safety and healthy state of water basins takes place when excess amount of nitrogen and phosphorus is discharged from wastewater. This results in eutrophication that is increased growth of seaweeds and, therefore, in ecological system disruption. The cities of the northwest region are short of funds for renovation of water treatment systems...
May 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28347912/on-site-removal-of-antibiotics-and-antibiotic-resistance-genes-from-leachate-by-aged-refuse-bioreactor-effects-of-microbial-community-and-operational-parameters
#13
Yinglong Su, Jiaxin Wang, Zhiting Huang, Bing Xie
The abuse of antibiotics has raised the prevalence of antibiotic resistance, which will pose potential risk to human health. Leachate, generated during the landfill treatment of municipal solid waste, is the important hotspot of the antibiotics and antibiotic resistance genes (ARGs), and no effective on-site treatment has been put forward for preventing ARGs dissemination. Herein, the aged refuse bioreactor was employed to remove antibiotics and ARGs from leachate, and the great removal performance was observed...
March 21, 2017: Chemosphere
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
#14
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/28332819/path-to-impact-for-autonomous-field-deployable-chemical-sensors-a-case-study-of-in-situ-nitrite-sensors
#15
Tim M Schierenbeck, Matthew C Smith
Natural freshwater systems have been severely affected by excess loading of macronutrients (e.g., nitrogen and phosphorus) from fertilizers, fossil fuels, and human and livestock waste. In the USA, impacts to drinking water quality, biogeochemical cycles, and aquatic ecosystems are estimated to cost US$210 billion annually. Field-deployable nutrient sensors (FDS) offer potential to support research and resource management efforts by acquiring higher resolution data than are currently supported by expensive conventional sampling methods...
April 11, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28281059/migration-of-nitrate-nitrite-and-ammonia-through-the-municipal-solid-waste-incinerator-bottom-ash-layer-in-the-simulated-landfill
#16
Jun Yao, Luxi Chen, Huayue Zhu, Dongsheng Shen, Zhanhong Qiu
Simulated landfill was operated for 508 days to investigate the effect of municipal solid waste incinerator (MSWI) bottom ash layer on the migration of nitrate, nitrite, and ammonia when it was used as the intermediate layer in the landfill. The result suggested that the MSWI bottom ash layer could capture the nitrate, nitrite, and ammonia from the leachate. The adsorption of the nitrate, nitrite, and ammonia on the MSWI bottom ash layer was saturated at the days 396, 34, and 97, respectively. Afterwards, the nitrogen species were desorbed from the MSWI bottom ash layer...
March 9, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28279583/a-quantitative-microbial-risk-assessment-model-for-total-coliforms-and-e-%C3%A2-coli-in-surface-runoff-following-application-of-biosolids-to-grassland
#17
Rachel Clarke, Dara Peyton, Mark G Healy, Owen Fenton, Enda Cummins
In Ireland, the land application of biosolids is the preferred option of disposing of municipal sewage waste. Biosolids provide nutrients in the form of nitrogen, phosphorus, potassium and increases organic matter. It is also an economic way for a country to dispose of its municipal waste. However, biosolids may potentially contain a wide range of pathogens, and following rainfall events, may be transported in surface runoff and pose a potential risk to human health. Thus, a quantitative risk assessment model was developed to estimate potential pathogens in surface water and the environmental fate of the pathogens following dilution, residence time in a stream, die-off rate, drinking water treatment and human exposure...
May 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28260661/facile-and-scalable-synthesis-of-magnetite-carbon-adsorbents-by-recycling-discarded-fruit-peels-and-their-potential-usage-in-water-treatment
#18
Ji Ma, Shuangshuang Sun, Kezheng Chen
In this study, apple, banana and orange peels were used as precursor compounds for the mass production of magnetite/carbon adsorbents. A so-called "soak-calcination" procedure was employed by firstly soaking these waste fruit peels in FeCl3 aqueous solutions and secondly calcining these precursors in the nitrogen atmosphere to yield final magnetite/carbon composites. This approach is quite simple and effective to synthesize carbon-based adsorbents on an industrial scale. The as-produced adsorbents feature the merits of appropriate ferromagnetism (>4emug(-1)), high adsorption capacity (several hundreds of milligrams per gram for adsorption of methyl blue, Congo red, rhodamine B and Cr(6+) ions), and good regenerability (>85%)...
February 20, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28257126/the-empirical-relationship-between-mining-industry-development-and-environmental-pollution-in-china
#19
Gerui Li, Yalin Lei, Jianping Ge, Sanmang Wu
This study uses a vector autoregression (VAR) model to analyze changes in pollutants among different mining industries and related policy in China from 2001 to 2014. The results show that: (1) because the pertinence of standards for mining waste water and waste gas emissions are not strong and because the maximum permissible discharge pollutant concentrations in these standards are too high, ammonia nitrogen and industrial sulfur dioxide discharges increased in most mining industries; (2) chemical oxygen demand was taken as an indicator of sewage treatment in environmental protection plans; hence, the chemical oxygen demand discharge decreased in all mining industries; (3) tax reduction policies, which are only implemented in coal mining and washing and extraction of petroleum and natural gas, decreased the industrial solid waste discharge in these two mining industries...
March 2, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28238487/human-waste-an-underestimated-source-of-nutrient-pollution-in-coastal-seas-of-bangladesh-india-and-pakistan
#20
Md Nurul Amin, Carolien Kroeze, Maryna Strokal
Many people practice open defecation in south Asia. As a result, lot of human waste containing nutrients such as nitrogen (N) and phosphorus (P) enter rivers. Rivers transport these nutrients to coastal waters, resulting in marine pollution. This source of nutrient pollution is, however, ignored in many nutrient models. We quantify nutrient export by large rivers to coastal seas of Bangladesh, India and Pakistan, and the associated eutrophication potential in 2000 and 2050. Our new estimates for N and P inputs from human waste are one to two orders of magnitude higher than earlier model calculations...
May 15, 2017: Marine Pollution Bulletin
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