![]() ![]() ![]() Protective gloves must be worn to prevent skin contact. Engineering and/or administrative controls should be implemented to reduce exposure. Always use respirators and components tested and approved under appropriate government standards such as NIOSH (US) or CEN (EU). Use a full-face respirator with multi-purpose combination (US) or type ABEK (EN14387) respirator cartridges in absence of proper environmental control. Respiratory Protection: If workplace exposure limit(s) of product or any component is exceeded (see TLV/PEL), or a risk assessment shows air-purifying respirators are appropriate, use of a NIOSH/MSHA approved air supplied respirator is advised. Eye wash and safety equipment should be readily available. This product should only by used by persons trained in the safe handling of hazardous chemicals. (P404)ĭo not get in eyes, on skin or clothing. Never give anything by mouth to an unconscious person. Call a physician or poison control center immediately. Skin contact: Immediately wash skin with soap and plenty of water. Assure adequate flushing by separating the eyelids with fingers. After initial flushing, remove any contact lenses and continue flushing for at least 15 minutes. Wear Metals (Organometallics) and Lubricating OilsĮye contact: Immediately flush with plenty of water.Detailed Hydrocarbon Analysis and SIM DIS.PFAS (Per- and Polyfluoroalkyl Substances).Limited data is available on the SCWO degradation pathways for the different PFAS. Note that some qualitative interpretation is provided regarding Non-Targeted Analysis (NTA), and not all NTA work is comparable. This document is intended to provide an overview of the GA SCWO technology tests, a summary of the results, and discuss various opportunities for use. ![]() ![]() Trace amounts of fluorinated hydrocarbon (FH) were also found in the liquid effluent, however, it is unclear if this comes from the contaminated quench water (softened tap water) that was shown to have higher PFAS levels than the liquid effluent. Fluorine appears mainly as a fluoride ion in the liquid effluent. After 50 hours of operation, limited corrosion was observed, since there was a slight increase in chromium concentrations in the effluent stream. After appropriate caustic neutralization of the reaction products, there was no HF detected in effluent streams. The sorbent tubes detected many trace organic compounds but no fluorinated compounds. PFAS target compounds were not detected above the background level in the gas analyses. In all tests, PFAS and total organic carbon (TOC) destruction efficiencies were > 99.99%. Sorbent tubes and canisters were used to sample gas for volatile organic compounds, PFAS, and other reaction by-products. Liquid influent feed stream and both liquid and gas effluent stream samples were collected and tested using various methods including, but not limited to EPA Method 537.1 for quantitative analysis of targeted PFAS in liquids, total organic carbon, chemical oxygen demand, total organic fluoride, non-targeted PFAS analysis, elemental analysis, and real-time measurement of stack emission flow to confirm the absence of various gases. This document aims to examine the destruction of PFAS in diluted AFFF using this specific technology this document does not represent an exhaustive review of all SCWO technologies or apply to all PFAS sources. The intent was to conduct treatability studies of low-to-medium dilutions of AFFF and identify the destruction efficiency of PFAS per the agreed-upon quality assurance project plan (QAPP).Īvailable information regarding the project is briefly summarized within this document. EPA – Office of Research and Development (EPA-ORD) entered into an agreement in November 2020 to allow for testing of the removal efficacy and destruction of per- and polyfluoroalkyl substances (PFAS) within aqueous film-forming foam (AFFF) using supercritical water oxidation (SCWO) technology currently available on the market. General Atomics (GA) (San Diego, CA) and U.S. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |