decontamination Articles
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Foaming properties of amine oxide-based surfactants
The present study deals with amine oxide-based foam formulation especially developed for decontamination application in the nuclear industries. The effect of various foam boosters such as Lauryl Amido Propyl Betaine (LAPB), Coco Diethanol Amide (CDEA) and Lauryl Alcohol Ethoxylate (LAE) on the foaming power of surfactants in the presence of several decontaminating chemicals has been evaluated. ...
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Plutonium decontamination using CBI DeconGel 1101 in highly contaminated and unique areas at LLNL
A highly contaminated glove-box at LLNL containing plutonium was decontaminated using a strippable decontamination gel. 6 x 12 inch quadrants were mapped out on each of the surfaces. The gel was applied to various surfaces inside the glove-box and was allowed to cure. The radioactivity in each quadrant was measured using a LLNL Blue Alpha meter with a 1.5 inch standoff distance. The results ...
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Empirical Theory of Vacuum-Assisted Steam Stripping of Organic Pollutants from Contaminated Soils
A theoretical model was developed for the removal of organic chemicals from soil via vacuum-assisted steam stripping. The model considers a homogeneous, isotropic soil described by a single steam permeability coefficient. (The author realizes that this is an idealization of most field situations.) It is assumed that the entire soil mass has been steam heated to 100°C (or slightly above), so the ...
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Cycle Parameters for Decontaminating a Biological Safety Cabinet Using H2O2 Vapor
Abstract Several studies have shown that hydrogen peroxide vapor (H2O2) can be useful in decontaminating HEPA filters, isolation chambers and centrifuge enclosures.13 However, before hydrogen peroxide can be used reliably in a biological safety cabinet (BSC), it is essential to establish the cycle parameters which allow full decontamination, and which minimize overall cycle time. This paper ...
By Baker
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Analysis of an Aseptic Process and Defining a Cleaning and Sanitization Plan
Abstract Cleaning and disinfection plans are a complex strategy to manage contamination risk in classified areas. Production residues (powder, oil, salts, etc.) and personnel-related contamination risk (production line in isolator, RABs, open line) should be e1aluated first before preparing and implementing cleaning and disinfection plans. The key aspects of decontamination should be defined ...
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Decontamination of medical radioisotopes from hard surfaces using peelable polymer-based decontamination agents joint research project with CBI and Colorado State University
Introduction Need for study: Contamination of treatment rooms Patient excretion Spills The efficacy of: 3 peelable decon agents removal of 3 medical isotopes from 2 surfaces Methods of Decontamination Absorbent pads and powders Soap and water Liquid decontamination agents Peelable decontamination agents Why Focus on Peelable Decontamination Agents? ...
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Decontamination of a HEPA Filter Using Hydrogen Peroxide Vapor
Abstract In the past, the life science and research community has decontaminated laboratories and lab equipment with highly toxic and carcinogenic chemicals such as formaldehyde and ethylene oxide. Since the EPA approved the use of hydrogen peroxide vapor (H2O2)for use in decontamination, the compound has become increasingly popular because it decomposes to oxygen and water, which are benign ...
By Baker
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Evaluating the surface protection and decontamination efficiency of DeconGel 1101 toward Cs-137 spilled on biological, salt-covered, rusty, wet and solid painted surfaces
This thesis presents an approach to develop innovative methods for decontamination and surface protection applicable to naval nuclear ships and potentially, personnel, replacing antiquated techniques. To accomplish this goal, two products manufactured by CBI Polymers, LLC., DeconGel™ 1101 (1101) and a shampoo, DeconGel™ 'prototype' (prototype), were tested. The prototype was specially ...
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Hot Gas Decontamination
Introduction: The process involves raising the temperature of the contaminated equipment or material to 260 °C (500 °F) for a specified period of time. The gas effluent from the material is treated in an afterburner system to destroy all volatilized contaminants. The method eliminates a waste that currently is stockpiled and requires disposal as a hazardous material. This method will permit ...
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Decontaminating Groundwater Sampling Devices
These studies are the second part of a two year project that examines decontaminating groundwater sampling devices. In the first year, the efficiency of various decontamination protocols was tested using small test pieces of materials that are commonly used in groundwater sampling devices. Those tests showed that a hot detergent wash and rinse followed by hot air drying (105°C) was the most ...
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Using Hydrogen Peroxide Vapor to Decontaminate Biological Safety Cabinets
Abstract Recent research has shown that hydrogen peroxide vapor (H2O2) can be used to decontaminate biological safety cabinets (BSC's) as an alternative to using formaldehyde or ethylene oxide.1,2,3 H2O2 is non-carcinogenic, highly effective as a decontaminant and is environmentally benign. However, H2O2 vapor decomposes quickly, so the gas must be rapidly circulated throughout the BSC. Also, ...
By Baker
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Accumulation and release of Pb(II) in aqueous solution by aquatic mosses (Fontinalis antipyretica)
The uptake and release of Pb(II) by Fontinalis antipyretica was studied in laboratory, by exposing the plants to different lead concentrations for 144 h and 335 h contamination and decontamination periods, respectively. A first order kinetic model was fitted to the experimental data to determine the uptake and release constants, k1 and k2, and other relevant parameters. The metal accumulation ...
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Bien Hoa, Vietnam - Case Study
In a project commissioned by the Global Environmental Facility and the United Nations Development Programme, EDL carried out a full-scale soil decontamination demonstration at a former US airbase in Vietnam. The trial successfully treated 150 tonnes of soil contaminated with Poly-Chlorinated Dibenzo-p-Dioxins and Dioxin-like Poly-Chlorinated Biphenyls; which are known to be amongst the most ...
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Refinery provides workers with total safety from decontamination - Case Study
Background: A top international oil and gas refinery on France’s western coast recently initiated a €400 million facility upgrade at their refinery to capture profitable new markets in low-sulfur fuels that meet evolving European Union specifications. This substantial investment will significantly improve the refinery’s profitability and secure its long-term future. Producing ...
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Suppression of particle deposition onto downstream wall in an AC Electrostatic Precipitator with neutralisation
Electrostatic Precipitators (ESPs) are used to decontaminate polluted environment around the tunnels. A conventional ESP has high collection efficiency but still has a problem in that its downstream walls are polluted due to particle deposition. The experiments carried out in this study have focused on how the particle deposition can be prevented by neutralising the gases. The collection ...
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PCB Decontamination Methods for Achieving TSCA Compliance During Facility Decommissioning Projects
ABSTRACT Facility decommissioning projects often include an environmental component that involves the identification of chemicals and hazardous building materials used at the site, decontamination or abatement of those materials, and proper disposal. PCBs are one chemical hazard that may need to be addressed during the dismantling of older industrial facilities. The continued use and ...
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Surface Decontamination of Zinc Compounds (Elemental Zinc Powder (Zn), Zinc Oxide (ZnO), and Zinc Acetate (Zn(O2CCH3)2) by DeconGel 1101
Abstract Surface decontamination efficacy determination of DeconGel™ 1101 on stainless steel, carbon steel, and concrete surfaces contaminated with zinc compounds (elemental zinc powder (Zn), zinc oxide (ZnO), and zinc acetate (Zn(02CCH3)2)) was performed with ICP-OES (Inductively Coupled Plasma-Optical Emission Spectroscopy) according to Environmental Protection Agency (EPA) SW-846 ...
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Property improvements of nano TiO2 in photodegradation of organic pollutions: a review
Nano TiO2 as a potential photocatalyst has been widely studied for application of environmental decontamination. In this paper, we examine and review the efforts in property improvements by modification, synthesis technique and operation parameter combined with some theory analysis. The effects of the modification by coupling with precious metal and narrow semiconductor, and doping with N, S, ...
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Surface Decontamination of Selenium Compounds (Selenium powder) by DeconGel 1101
Abstract Surface decontamination efficacy determination of DeconGel™ 1101 on stainless steel, carbon steel, and concrete surfaces contaminated with Selenium powder was performed with ICP-OES (Inductively Coupled Plasma-Optical Emission Spectroscopy) according to Environmental Protection Agency (EPA) SW-846 Methods: 3005A (sampling) and 6010C (analysis). Hazardous Materials Relevance ...
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Comparative analysis of existing disinfection models
For a long time Marais's model has been the main tool for disinfection prediction in waste stabilization ponds (WSPs), although various authors have developed other disinfection models. Some ten other empirical models have been listed over the past fifteen years. Unfortunately, their predictions of disinfection in a given pond are very different. The existing models are too empirical to give ...
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