Difference between revisions of "Main Page"
Line 29: | Line 29: | ||
<div id="mp-itn" style="padding:0.0em 0.5em;"> | <div id="mp-itn" style="padding:0.0em 0.5em;"> | ||
− | <slideshow sequence="random" transition="fade" refresh=" | + | <slideshow sequence="random" transition="fade" refresh="5000"> |
[[File:WH Picture1.JPG|thumb|center|x350px|link=Dispersion and Diffusion|Molecular diffusion slowly transports solutes into clay-rich, lower permeability zones]] | [[File:WH Picture1.JPG|thumb|center|x350px|link=Dispersion and Diffusion|Molecular diffusion slowly transports solutes into clay-rich, lower permeability zones]] | ||
Line 75: | Line 75: | ||
*[[Dispersion and Diffusion]] | *[[Dispersion and Diffusion]] | ||
*[[Metals and Metalloids - Mobility in Groundwater | Mobility of Metals and Metalloids]] | *[[Metals and Metalloids - Mobility in Groundwater | Mobility of Metals and Metalloids]] | ||
− | |||
*[[pH Buffering in Aquifers]] | *[[pH Buffering in Aquifers]] | ||
*[[Sorption of Organic Contaminants]] | *[[Sorption of Organic Contaminants]] | ||
Line 92: | Line 91: | ||
**[[Geophysical Methods - Case Studies | Case Studies]] | **[[Geophysical Methods - Case Studies | Case Studies]] | ||
*[[Groundwater Sampling - No-Purge/Passive]] | *[[Groundwater Sampling - No-Purge/Passive]] | ||
− | |||
*[[Long-Term Monitoring (LTM)|Long-Term Monitoring (LTM)]] | *[[Long-Term Monitoring (LTM)|Long-Term Monitoring (LTM)]] | ||
**[[Long-Term Monitoring (LTM) - Data Analysis | LTM Data Analysis]] | **[[Long-Term Monitoring (LTM) - Data Analysis | LTM Data Analysis]] | ||
Line 114: | Line 112: | ||
*[[In Situ Treatment of Contaminated Sediments with Activated Carbon]] | *[[In Situ Treatment of Contaminated Sediments with Activated Carbon]] | ||
+ | |||
+ | <u>'''[[Light Non-Aqueous Phase Liquids (LNAPLs)]]'''</u> | ||
+ | |||
+ | *[[LNAPL Conceptual Site Models]] | ||
+ | *[[LNAPL Remediation Technologies]] | ||
+ | *[[NAPL Mobility]] | ||
<u>'''[[Munitions Constituents]]'''</u> | <u>'''[[Munitions Constituents]]'''</u> | ||
Line 163: | Line 167: | ||
*[[Injection Techniques - Viscosity Modification]] | *[[Injection Techniques - Viscosity Modification]] | ||
*[[Landfarming]] | *[[Landfarming]] | ||
− | |||
*[[Metal and Metalloids - Remediation | Remediation of Metals and Metalloids]] | *[[Metal and Metalloids - Remediation | Remediation of Metals and Metalloids]] | ||
*[[Remediation Performance Assessment at Chlorinated Solvent Sites]] | *[[Remediation Performance Assessment at Chlorinated Solvent Sites]] | ||
Line 183: | Line 186: | ||
*[[N-nitrosodimethylamine (NDMA)]] | *[[N-nitrosodimethylamine (NDMA)]] | ||
*[[Perchlorate|Perchlorate]] | *[[Perchlorate|Perchlorate]] | ||
− | *[[Perfluoroalkyl and Polyfluoroalkyl Substances (PFAS) | + | *[[Perfluoroalkyl and Polyfluoroalkyl Substances (PFAS)]] |
*[[Petroleum Hydrocarbons (PHCs)]] | *[[Petroleum Hydrocarbons (PHCs)]] | ||
*[[Polycyclic Aromatic Hydrocarbons (PAHs)]] | *[[Polycyclic Aromatic Hydrocarbons (PAHs)]] |
Revision as of 20:01, 17 September 2020
Peer Reviewed. Accessible. Written By Experts |
Your Environmental Information Gateway |
The goal of ENVIRO.wiki is to make scientific and engineering research results more accessible to environmental professionals, facilitating the permitting, design and implementation of environmental projects. Articles are written and edited by invited experts (see Contributors) to summarize current knowledge for the target audience on an array of topics, with cross-linked references to reports and technical literature. | See Table of Contents |
Featured article: Sustainable RemediationPhotoactivated Reductive Defluorination (PRD) is a PFAS destruction technology predicated on ultraviolet (UV) light-activated photochemical reactions. The destruction efficiency of this process is enhanced by the use of a surfactant to confine PFAS molecules in self-assembled micelles. The photochemical reaction produces hydrated electrons from an electron donor that associates with the micelle. These highly reactive hydrated electrons have the energy required to cleave fluorine-carbon and other molecular bonds resulting in the final products of fluoride, water, and simple carbon molecules. Since the reaction is performed at ambient temperature and pressure, there are limited concerns regarding environmental health and safety or volatilization of PFAS compared to heated and pressurized systems. Due to the reductive nature of the reaction, there is no formation of unwanted byproducts resulting from oxidative processes. The PRD reaction rate decreases in water matrices with high levels of total dissolved solids (TDS). The PRD reaction rate decreases in water matrices with very low UV transmissivity. Low UV transmissivity (i.e., < 1 %) prevents the penetration of UV light into the solution, such that the utilization efficiency of UV light decreases. Due to the first-order kinetics of PRD, destruction of PFAS is generally most energy efficient when paired with pre-concentration technologies, such as foam fractionation (FF), nanofiltration, reverse osmosis, or resin/carbon adsorption, that remove PFAS from water.
(Full article...) |
Enviro Wiki Highlights |