Advanced methods for activated carbon from agriculture wastes; a comprehensive review

The rapid increase in various industries and the subsequent contamination of water bodies by heavy metals caused water stress circumstances globally. The adsorption is among the effective methods which is used for removing heavy metals from the water bodies. Moreover, the adsorption treatment of wastewater by activated carbon (AC) from bio-waste is getting recognition among researchers due to cost-effective. Therefore the current paper aimed to review the adsorption by activated carbon from agro waste, preparation method of AC and adsorption mechanism. The factors affecting the adsorption, adsorption isotherm and kinetics of adsorption were also reviewed. It is appeared from the reviewed papers that the AC from agro waste exhibited high efficiency in removing heavy metals from different wastewater. Moreover, the metal-adsorbed adsorbent desorption through dilute acids are HCl, HNO3, NaOH, KOH, H2SO4, NaNO3, EDTA and Na-citrate. Therefore, the suitable eluting chemicals to the adsorbent and adsorbate must be selected in order to enable maximum recovering percentage

Photoionization of Metastable O^+ Ions: Experiment and Theory

Relevant data is available at: http://www.astronomy.ohio-state.edu/~nahar/nahar_radiativeatomicdata/index.htmlHigh-resolution absolute experimental measurements and two independent theoretical calculations were performed for photoionization of O^+ ions from the ^2 P° and ^2 D° metastable levels and from the ^4 S° ground state in the photon energy range 30–35.5 eV. This is believed to be the first comparison of experiment and theory to be reported for photoionization from metastable states of ions. While there is correspondence between the predicted and measured positions and relative strengths of the resonances, the cross-section magnitudes and fine structure are sensitive to the choice of basis states.The experimental work was supported in part by the DOE Divisions of Chemical Sciences, Geosciences and Biosciences, and Materials Sciences, by the DOE Facilities Initiative, by Nevada DOE/EPSCoR, by CONACyT and DGAPA (Mexico), and by CNPq (Brazil). The theoretical work was supported in part by NSF, by the Ohio Supercomputer Center, by ITAMP/Harvard-Smithsonian, and by EPSRC (UK)

Quality standards for the management of alcohol-related liver disease: consensus recommendations from the British Association for the Study of the Liver and British Society of Gastroenterology ARLD special interest group

Objective Alcohol-related liver disease (ALD) is the most common cause of liver-related ill health and liver-related deaths in the UK, and deaths from ALD have doubled in the last decade. The management of ALD requires treatment of both liver disease and alcohol use; this necessitates effective and constructive multidisciplinary working. To support this, we have developed quality standard recommendations for the management of ALD, based on evidence and consensus expert opinion, with the aim of improving patient care. Design A multidisciplinary group of experts from the British Association for the Study of the Liver and British Society of Gastroenterology ALD Special Interest Group developed the quality standards, with input from the British Liver Trust and patient representatives. Results The standards cover three broad themes: the recognition and diagnosis of people with ALD in primary care and the liver outpatient clinic; the management of acutely decompensated ALD including acute alcoholrelated hepatitis and the posthospital care of people with advanced liver disease due to ALD. Draft quality standards were initially developed by smaller working groups and then an anonymous modified Delphi voting process was conducted by the entire group to assess the level of agreement with each statement. Statements were included when agreement was 85% or greater. Twenty-four quality standards were produced from this process which support best practice. From the final list of statements, a smaller number of auditable key performance indicators were selected to allow services to benchmark their practice and an audit tool provided. Conclusion It is hoped that services will review their practice against these recommendations and key performance indicators and institute service development where needed to improve the care of patients with ALD

Genomic analyses inform on migration events during the peopling of Eurasia.

High-coverage whole-genome sequence studies have so far focused on a limited number of geographically restricted populations, or been targeted at specific diseases, such as cancer. Nevertheless, the availability of high-resolution genomic data has led to the development of new methodologies for inferring population history and refuelled the debate on the mutation rate in humans. Here we present the Estonian Biocentre Human Genome Diversity Panel (EGDP), a dataset of 483 high-coverage human genomes from 148 populations worldwide, including 379 new genomes from 125 populations, which we group into diversity and selection sets. We analyse this dataset to refine estimates of continent-wide patterns of heterozygosity, long- and short-distance gene flow, archaic admixture, and changes in effective population size through time as well as for signals of positive or balancing selection. We find a genetic signature in present-day Papuans that suggests that at least 2% of their genome originates from an early and largely extinct expansion of anatomically modern humans (AMHs) out of Africa. Together with evidence from the western Asian fossil record, and admixture between AMHs and Neanderthals predating the main Eurasian expansion, our results contribute to the mounting evidence for the presence of AMHs out of Africa earlier than 75,000 years ago.Support was provided by: Estonian Research Infrastructure Roadmap grant no 3.2.0304.11-0312; Australian Research Council Discovery grants (DP110102635 and DP140101405) (D.M.L., M.W. and E.W.); Danish National Research Foundation; the Lundbeck Foundation and KU2016 (E.W.); ERC Starting Investigator grant (FP7 - 261213) (T.K.); Estonian Research Council grant PUT766 (G.C. and M.K.); EU European Regional Development Fund through the Centre of Excellence in Genomics to Estonian Biocentre (R.V.; M.Me. and A.Me.), and Centre of Excellence for Genomics and Translational Medicine Project No. 2014-2020.4.01.15-0012 to EGC of UT (A.Me.) and EBC (M.Me.); Estonian Institutional Research grant IUT24-1 (L.S., M.J., A.K., B.Y., K.T., C.B.M., Le.S., H.Sa., S.L., D.M.B., E.M., R.V., G.H., M.K., G.C., T.K. and M.Me.) and IUT20-60 (A.Me.); French Ministry of Foreign and European Affairs and French ANR grant number ANR-14-CE31-0013-01 (F.-X.R.); Gates Cambridge Trust Funding (E.J.); ICG SB RAS (No. VI.58.1.1) (D.V.L.); Leverhulme Programme grant no. RP2011-R-045 (A.B.M., P.G. and M.G.T.); Ministry of Education and Science of Russia; Project 6.656.2014/K (S.A.F.); NEFREX grant funded by the European Union (People Marie Curie Actions; International Research Staff Exchange Scheme; call FP7-PEOPLE-2012-IRSES-number 318979) (M.Me., G.H. and M.K.); NIH grants 5DP1ES022577 05, 1R01DK104339-01, and 1R01GM113657-01 (S.Tis.); Russian Foundation for Basic Research (grant N 14-06-00180a) (M.G.); Russian Foundation for Basic Research; grant 16-04-00890 (O.B. and E.B); Russian Science Foundation grant 14-14-00827 (O.B.); The Russian Foundation for Basic Research (14-04-00725-a), The Russian Humanitarian Scientific Foundation (13-11-02014) and the Program of the Basic Research of the RAS Presidium “Biological diversity” (E.K.K.); Wellcome Trust and Royal Society grant WT104125AIA & the Bristol Advanced Computing Research Centre (http://www.bris.ac.uk/acrc/) (D.J.L.); Wellcome Trust grant 098051 (Q.A.; C.T.-S. and Y.X.); Wellcome Trust Senior Research Fellowship grant 100719/Z/12/Z (M.G.T.); Young Explorers Grant from the National Geographic Society (8900-11) (C.A.E.); ERC Consolidator Grant 647787 ‘LocalAdaptatio’ (A.Ma.); Program of the RAS Presidium “Basic research for the development of the Russian Arctic” (B.M.); Russian Foundation for Basic Research grant 16-06-00303 (E.B.); a Rutherford Fellowship (RDF-10-MAU-001) from the Royal Society of New Zealand (M.P.C.)

Modelling and simulation of performance and combustion characteristics of diesel engine

Gudimetla, PV ORCiD: 0000-0002-9402-1763; Nabi, M ORCiD: 0000-0002-4087-930X; Rasul, M ORCiD: 0000-0001-8159-1321The main objective of this study was to develop a thermodynamic model to analyse engine performance and combustion behavior of a single cylinder, four-stroke, naturally aspirated, direct injection (DI) diesel engine. The model was developed with a commercial GT-Power software. Various sub-models for different systems including intake, exhaust, fuel injection, combustion, and heat transfer rate were combined for thermodynamic analysis of engine performance and combustion behaviour. The engine rotational speed, start of injection timing and compression ratio were considered as variables. The engine rotational speeds were varied from 800 rpm to 2500 rpm, the start of injection timings was ranged from 15o crank angle (CA) before top dead centre (bTDC) to 15o CA after top dead centre (aTDC), and the compression ratios were changed from 13 to 25. Performance parameters such as indicated and brake power, brake thermal efficiency, friction, etc. and combustion parameters such as heat transfer rate and in-cylinder pressure are analysed at different engine rotational speed, injection timing, and compression ratio, and discussed accordingly. The optimum performance such as BTE, BT and BMEP were found at the engine speed of 1700 rpm, a start of injection timing of 10o bTDC, and a compression ratio of 20. © 2019 The Authors. Published by Elsevier Ltd

Notable reductions in blow-by and particle emissions during cold and hot start operations from a turbocharged diesel engine using oxygenated fuels

The present study explores a comprehensive investigation of diesel blow-by, particulate matter (PM), particulate number (PN) and nitrogen oxides (NOx) emissions for cold and hot start operations in a six-cylinder, turbocharged diesel engine. A wide range of oxygenated blends of fuel-bound oxygen ranging from ~4% to ~8% (wt%) was used in the study. A reference diesel was also used for the comparison of the emissions results with those of oxygenated blends. Waste cooking biodiesel and an oxygenate, diethylene glycol dimethyl ether (diglyme) having three times higher cetane number than diesel and high fuel-bound oxygen, was used to make the oxygenated blends for examining the effect of fuel oxygen on diesel blow-by, PM, PN and NOx emissions. Carbon monoxide (CO), total unburned hydrocarbon (THC) and carbon dioxide (CO2) emissions were not targeted in this investigation. Fuel energy rate, exergy rate and exergetic cost were also investigated in this study. The experimental results show, blow-by, both PM and PN emissions were reduced significantly with a penalty of NOx emissions with oxygenated blends compared to diesel fuel during both cold and hot start operations. The energy rate, exergy rate and exergetic cost with oxygenated blends reveal insignificant variations relative to diesel.</p

The potential of utilising papaya seed oil and stone fruit kernel oil as non-edible feedstock for biodiesel production in Australia—A review

Ashwath, N ORCiD: 0000-0002-4032-4507; Nabi, M ORCiD: 0000-0002-4087-930X; Rasul, M ORCiD: 0000-0001-8159-1321This paper reviews and discusses the potential of papaya seed and stone fruit kernel biodiesels — the two sources of 2nd generation transport biodiesels in Australia. The challenges associated with biodiesel production and their possible solutions, particularly on feedstock selection, oil extraction, conversion of oil into biodiesel, biodiesel storage and transport, costs of production and the information needs for commercialising these sources of biodiesels are discussed, along with the eco-friendly attributes of these biodiesels to Australian transport sector. Some researchers report that the use of papaya seed and stone fruit kernel biodiesels reduce engine power only 2 to 5%), however significantly reduce harmful engine emission such as HC reductions of 9 to 19%, PM reductions of 19.5 to 35% and CO reductions of 11 to 29%. © 2019 The Author