scholarly journals Experimental method for the assessment and characterization of hazardous waste for long-term storage

2021 ◽  
Vol 3 (1) ◽  
pp. 19-28
Author(s):  
Gina Alina Catrina ◽  
◽  
Bogdan Stanescu ◽  
Agnes Serbanescu ◽  
Georgiana Cernica ◽  
...  
Keyword(s):  
Redox Potential ◽  
Experimental Method ◽  
Hazardous Waste ◽  
Ph Value ◽  
Ph Values ◽  
Long Term Storage ◽  
Chemical Conditions ◽  
Term Storage

Long-term landfilling of hazardous waste should be a careful choice for any producer or generator of waste, as the behavior of the waste is different due to the physical-chemical conditions or following contact with other hazardous waste. In this study, the research undertaken was aimed at developing an experimental method for the assessment and characterization of hazardous waste for long-term storage. The method consists in the assessment of the behavior of heavy metals from waste, under different leaching conditions. To study various hazardous wastes, fly ash from the incineration of medical waste and slag from aluminum casting were chosen. Contact time, pH and redox potential are important parameters in the leaching process. The solubility of metals increases at pH values between 2 - 5 pH units and decreases at pH values between 6-12 pH units. The highest solubility of metals (As, Cr, Cu, Ni, Pb and Zn) in the tested waste was obtained after 48 hours at pH values between 2 - 5 pH units. Also, the values of the redox potential decrease almost linearly as the pH value increases. The developed method is a useful tool to assess the behavior of hazardous waste for long-term storage in landfills for this category of wastes.

Characterization of aluminum nanopowders after long-term storage

2014 ◽  
Vol 321 ◽  
pp. 475-480 ◽  
Author(s):  
O.B. Nazarenko ◽  
Yu.A. Amelkovich ◽  
A.I. Sechin
Keyword(s):  
Long Term Storage ◽  
Term Storage

scholarly journals Characterization of Representative Materials in Support of Safe, Long Term Storage of Surplus Plutonium in DOE-STD-3013 Containers

2013 ◽  
Author(s):  
Joshua E. Narlesky ◽  
Mary Ann Stroud ◽  
Paul Herrick Smith ◽  
David M. Wayne ◽  
Richard E. Mason ◽  
...  
Keyword(s):  
Long Term Storage ◽  
Term Storage

Characterization of Botrytis spp. from Chilean kiwifruit populations and pre-harvest prediction of risk of grey mould in long-term storage

2018 ◽  
pp. 333-340
Author(s):  
H. García ◽  
M. Lopez ◽  
A. Espinoza ◽  
V. Rojas ◽  
E. Silva-Moreno ◽  
...  
Keyword(s):  
Grey Mould ◽  
Long Term Storage ◽  
Term Storage

scholarly journals Retesting the anti-doping samples: Best tool for deterrence?

2016 ◽  
Vol 64 (3) ◽  
Keyword(s):  
Good Tool ◽  
Long Term Storage ◽  
Technological Advances ◽  
Tour De France ◽  
Accredited Laboratories ◽  
Detection Window ◽  
Androgenic Steroids ◽  
Term Storage

Long term storage of the anti-doping samples and their ­reanalyses becomes today more and more a trend in the anti-doping community. The procedure has been implemented by the anti-doping authorities for the samples of the Tour de France and for the Olympic Games since Athens 2004 and has been always presented as a good tool to deter doping habits in top level sport. Recently, the World Anti-Doping Code introduced the possibility for anti-doping organizations to store the athletes’ samples up to ten years. The anti-doping authorities may ask to reanalyze the samples at any time during that period of time as a function of the implementation of new methods or instruments in the accredited laboratories allowing the detection of prohibited substances or their metabolites at a much lower concentration or for a larger detection window. The most significant technological advances for the detection of doping substances have been done in the characterization of various long-term metabolites of anabolic androgenic steroids. This allowed for increasing the time of detection by even a factor of four.

A technique for long-term storage of clay samples

1986 ◽  
Vol 23 (4) ◽  
pp. 602-605 ◽  
Author(s):  
P. La Rochelle ◽  
S. Leroueil ◽  
F. Tavenas
Keyword(s):  
Key Words ◽  
Aging Effects ◽  
Ph Values ◽  
Long Term Storage ◽  
Sensitive Clay ◽  
Term Storage

This note describes a technique for sealing and storing clay samples so as to prevent aging effects during long periods of storage. It also gives the results of a study carried out on samples stored from 3 to 8 years, which prove the efficiency of that technique; the liquid limits, the liquidity indices, and the pH values remained constant during these long periods of storage. Key words: sensitive clay, storing, sealing, aging.

scholarly journals Evaluation of Technological Properties and Oxidative Stability of Organic Dry Fermented Probiotic Sausages During Long-Term Storage

2012 ◽  
Vol 56 (3) ◽  
pp. 305-314 ◽  
Author(s):  
Karolina M. Wójciak ◽  
Monika Trząskowska ◽  
Danuta Kołożyn-Krajewska ◽  
Zbigniew J. Dolatowski
Keyword(s):  
Oxidative Stability ◽  
Ph Value ◽  
Oxidation Stability ◽  
Storage Period ◽  
Probiotic Strain ◽  
Peroxide Number ◽  
Sodium Ascorbate ◽  
Long Term Storage ◽  
Term Storage

Abstract The objective of this work was to study the oxidative stability of organic dry fermented probiotic sausages during long-term storage (6 months). Four test samples were prepared: sample A - control sausage, sample B - with 0.05% addition of sodium ascorbate, sample C - with addition of Lb. casei LOCK 0900 (2x106 CFU/g) probiotic strain, 0.6% of glucose, and 0.05% of sodium ascorbate, and sample D - with 0.05% of sodium ascorbate, probiotics, and 0.6% of lactose. The study covered evaluation of the ripening process (21 d) by evaluating loss in the sausage weight. The pH value, oxidation-reduction potential, TBARS values, acid number, peroxide number, browning index after ripening (0) and after 2nd, 4th, and 6th month of chilling storage were identified. The total colour difference of sausages subjected to 3 h exposure to fluorescent light, texture parameters, and count of lactic acid bacteria (LAB) were identified after ripening (0) and after 6 months of storage. It was observed that an addition of probiotic bacteria and glucose (sample C) contributed to a significant decrease in the pH value and water activity in the sausage directly after ripening and during the entire chilling storage period. In samples with probiotics the option with glucose had a lower (P≤0.05) pH value by ca. 0.5 unit as compared to the sample with lactose. Significantly higher (P≤0.05) values of TBARS were observed in samples with probiotics as compared to control samples. The greatest oxidation stability during the entire chilling storage period was found in the sample with sodium ascorbate. Among samples with probiotic strain, the sample with glucose had the lowest peroxide number value (0.58-3.56 meqO2/kg) and TBARS (1.10-2.08 mg MDA/kg) but also the greatest colour stability during exposure to light. The order of decline in oxidative stability was: sample B > sample C > sample D > sample A.

Effect of Freezing, Long-Term Storage, and Microwave Thawing on the Stability of Ketorolac Tromethamine

2005 ◽  
Vol 39 (10) ◽  
pp. 1654-1658 ◽  
Author(s):  
Jean-Daniel Hecq ◽  
Laurence P Boitquin ◽  
Danielle F Vanbeckbergen ◽  
Jacques Jamart ◽  
Laurence M Galanti
Keyword(s):  
Time Management ◽  
Color Change ◽  
Ph Value ◽  
Regression Line ◽  
Time Profile ◽  
Ketorolac Tromethamine ◽  
Long Term Storage ◽  
The Stability ◽  
Term Storage

BACKGROUND: Ketorolac tromethamine is a nonsteroidal agent with potent analgesic and moderate antiinflammatory activity. Advance preparation of intravenous solution could be useful to improve quality assurance, time management, and cost-savings of drug delivery. Objective: To investigate the effect of freezing, long-term storage, and microwave thawing on the stability of ketorolac tromethamine in dextrose 5% infusion. METHODS: Five polyolefin bags of solution containing ketorolac tromethamine 20 mg per 100 mL of dextrose 5% were frozen for 3 months at −20 °C, thawed in a microwave oven with a validated cycle, and stored at 4 °C. The concentration of ketorolac was measured by HPLC. Visual inspection and pH measurement were also carried out. RESULTS: No color change or precipitation was observed. Ketorolac was stable for at least 60 days under refrigeration after freeze–thaw. Throughout this period, the lower confidence limit of the estimated regression line of the concentration–time profile remained >90% of the initial concentration, and the pH value decreased slightly without affecting chromatographic parameters. CONCLUSIONS: Within these limits, ketorolac tromethamine in dextrose 5% infusion may be prepared and frozen in advance by a centralized intravenous admixture service, then thawed before use in clinical units.

scholarly journals Characterization of Compaction and Dryout Properties of KE Basin Sludge During Long-Term Storage

2005 ◽  
Author(s):  
Calvin H Delegard ◽  
Adam P Poloski ◽  
Andrew J Schmidt ◽  
Jeffrey W Chenault
Keyword(s):  
Long Term Storage ◽  
Term Storage
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