#remediation — Public Fediverse posts

In wake of #SpokaneComplex fires, helpers arrive in droves

https://www.kuow.org/climate/2026-08-13/in-wake-of-spokane-complex-fires-helpers-arrive-in-droves #conflagration #urbanwildfires #remediation #mutualassistance #climate

#Eggshells from agro-industrial waste for the recovery of #lime, #portlandite, and #calcite nanoparticles through the lime cycle: A circular economic approach

Highlights:

• The study proposes to obtain calcite (#CaCO3) from eggshell agro-industrial waste within a circular economy approach.
• The lime cycle can be used to transform calcite (CaCO3) into lime (CaO) or portlandite (Ca(OH)2).
• Eggshells contain trace elements that can aid in synthesizing materials for #EnvironmentalRemediation..

"Eggshells from agro-industrial waste can be used as natural source to obtain nanometric CaCO3, CaO, and Ca(OH)2 using the lime cycle. The nanometric size and the phase identification of all samples were confirmed by X-ray diffraction and FWHM. The SEM images show that CaCO3, CaO, and Ca(OH)2 from eggshells are microparticles in the form of nanocrystals, which correlate with the DLS results. The Zeta Potential varies due to the loss of CO2 when CaCO3 is converted in CaO, and for this reason, the CaO is more negative. When CaO is hydrated, the Ca(OH)2 is more stable, and these differences can be attributed to the mineral content in the samples. Eggshells naturally have different trace minerals that maintain a long calcium cycle and show variation due to a concentration effect when the CaCO3 changes to CaO. There is a notable a decrease of the trace minerals when CaO. When CaO is converted to Ca(OH)2, there is a significant decrease in trace minerals as some ions are soluble in the water during soaking. It is recommended to carry out the conversion of CaO to Ca(OH)2 under controlled conditions (low humidity and CO2). These findings can be useful to treat #AgroIndustrial waste and to develop nanotechnological applications in different fields."

Full article:
https://www.sciencedirect.com/science/article/pii/S2949839224000166

#SolarPunkSunday #CircularEconomy #ZeroWaste #NewTechnology #Remediation

#WJARR / Omoniyi Gbohunmi Korede, Oluwaferanmi O. Akinyemi, Adeyemi Zaheed Oshilalu:

Environmental and ecological impact of radioactive waste disposal

https://wjarr.com/content/environmental-and-ecological-impact-radioactive-waste-disposal

#pdf: https://wjarr.com/sites/default/files/fulltext_pdf/WJARR-2023-0728.pdf

2023

#Atommüll #Bioaccumulation #Biodiversity #Contamination #EcologicalImpact #NuclearWaste #RadioactiveWaste #Remediation

🌎 Mapping dominant chemical speciation in a polluted carbonate aquifer

In my recent modeling work, I modeled the dominant forms of element speciation in groundwater within a carbonate system.

Beyond pure geochemical curiosity, this approach provides a practical lens:
– it reveals where mineral precipitation is most probable,
– and helps identify zones where remediation can be most effective.

💻 Combining thermodynamic modeling (PHREEQC) with spatial analysis in R and QGIS turns subsurface processes into actionable insights for water-quality management and contamination mitigation.

Two figures below show the modeled distribution of cadmium species across the aquifer and their evolution with dilution

📘 Full details in the draft monograph:
🔗 https://zenodo.org/records/16741148

#Geochemistry #Hydrogeology #PHREEQC #GroundwaterContamination #MineWater #EnvironmentalGeochemistry #Metasomatism #Aquifer #RStats #QGIS #GeospatialAnalysis #OpenScience #IndependentResearch #WaterQuality #Remediation #SvystunovaGully

Frozen No More - A Case Study Of Arctic Permafrost Impacts Of Oil And Gas Withdrawal
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https://doi.org/10.1038/s41598-024-76292-2 <-- shared paper
--
#GIS #spatial #mapping #remotesening #earthobservation #oil #gas #oilandgas #O&G #energy #extraction #drilling #exploration #subsurface #permafrost #melting #humanimpacts #climatechange #oilextraction #risk #hazard #riskassessment #water #hydrology #sediment #tundra #oilwellpads #NorthSlope #Alaska #arctic #spatialanalysis #spatiotemporal #remediation #drillpad #oilpad #lease #industry #habitat #ecosystem #fieldwork #sampling #geology #engineeringgeology #impact

#Sweden - Removal of #PFAS from water by #AquaticPlants

Maria Greger, Tommy Landberg
February, 2024

Highlights

• High total biomass is important plant trait for high PFAS accumulation from water.
• Higher PFAS accumulation in shoot than roots with time.
• Degradation of PFAS with root peroxidases and laccases.

Abstract:

"We have found that aquatic plants can reduce the content of perfluorinated alkyl substances (PFAS) within a short period of time. The aim of this study was to determine the variation in the uptake of PFAS from contaminated water by various #wetland plant species, investigate the effect of #biomass on PFAS removal, and determine whether laccases and peroxidases are involved in the removal and degradation of PFAS. Seventeen emergent and one submerged wetland plant species were screened for PFAS uptake from highly contaminated lake water. The screening showed that #EriophorumAngustifolium, #CarexRostrata, and #ElodeaCanadensis accumulated the highest levels of all PFAS. These species were thereafter used to investigate the effect of biomass on PFAS removal from water and for the enzyme studies. The results showed that the greater the biomass per volume, the greater the PFAS removal effect. The plant-based removal of PFAS from water is mainly due to plant absorption, although degradation also occurs. In the beginning, most of the PFAS accumulated in the roots; over time, more was translocated to the shoots, resulting in a higher concentration in the shoots than in the roots. Most PFAS degradation occurred in the water; the metabolites were thereafter taken up by the plants and were accumulated in the roots and shoots. Both peroxidases and laccases were able to degrade PFAS. We conclude that wetland plants can be used for the purification of PFAS-contaminated water. For effective purification, a high biomass per volume of water is required."

Read more:
https://www.sciencedirect.com/science/article/pii/S030147972302683X

#SolarPunkSunday #PFAScontamination #ForeverChemicals #PollutionSolutions #WaterIsLife #PFASPollution #Remediation #PFASRemoval #PFASRemediation

#Australia: Research shows #NativePlants can detox #PFAS-contaminated #water

New research from Australia's national science agency #CSIRO, the #UniversityOfSouthAustralia and the #UniversityOfWesternAustralia has found that PFAS chemicals can be removed from contaminated water using Australian plants grown in a floating #wetland.

May 4, 2022

"They’re the non-stick on #Teflon cookware, the stain resistance in #Scotchgard, and the suppression factor in #FirefightingFoam, but while the staying power of PFAS chemicals was once revered, it’s now infamous as PFAS substances continue to infiltrate the #environment and affect human health.

"Now, new research from the University of South Australia is helping to remediate the ‘indestructible’ PFASs as scientists show that Australian native plants can significantly remediate PFAS pollutants through floating wetlands to create healthier environments for all.

"Conducted in partnership with CSIRO and the University of Western Australia, the research found that PFAS chemicals (per- and poly-fluoroalkyl substances) can be removed from contaminated water via Australian #NativeRushes - #PhragmitesAustralis, #BaumeaArticulata, and #JuncusKraussii.

"Phragmites australis, otherwise known as the #CommonReed, removed legacy PFAS contaminants by 42-53 per cent from contaminated surface water (level: 10 µg/L).

"According to the US Environmental Protection Agency, exposure to PFAS may lead to a range of health issues including a decline in fertility, developmental delays in children, increased risk of some cancers, a reduced immune system, higher cholesterol, and risk of obesity.

"UniSA and CSIRO researcher Dr John Awad says that this research could alleviate many of these environmental and health risks by providing a clean, green, and cost-effective method to remove PFAS from the environment.

" 'PFASs are often referred to as ‘forever chemicals’ because they don’t break down, instead accumulating in the environment and in our bodies where they can cause adverse health effects,' Dr Awad says.

" 'In Australia, PFAS concerns often relate to the use of firefighting foam – especially legacy firefighting foam – which accumulates in the #SurfaceWater of our #waterways.

" 'Our research tested the effectiveness of Australian rushes to remove #PFASChemicals from #stormwater, finding that Phragmites australis was the most effective at absorbing chemicals through its roots and shoots.'

"The study used constructed floating wetlands as a mechanism for plants to grow #hydroponically. Dr Awad says floating wetlands present a novel and flexible way for natural #remediation systems.

" 'Constructed floating wetlands can be readily installed into existing urban environments, such as holding reservoirs and retention basins, making them highly manoeuvrable and adaptable to local waterways,' Dr Awad says.

" 'Plus, as this innovative water treatment system does not require pumping or the ongoing addition of #chemicals, it is a #CostEffective remediation system for PFAS removal.

" 'Add native plants to the mix and we have delivered a truly clean, green and environmentally-friendly method for removing toxic PFAS chemicals from contaminated water.' "

Notes to editors:

- So far, the floating wetlands system has only been examined under control laboratory conditions for PFAS remediation and the research team is looking forward to testing it in the real world, under natural conditions.
- This research is being carried out at the UniSA Mawson Lakes campus. PFAS has not been detected in or around Mawson lakes."

https://www.csiro.au/en/news/All/News/2022/May/Hydroponic-native-plants-to-detox-PFAS-contaminated-water

Original press release:
https://www.unisa.edu.au/media-centre/Releases/2022/hydroponic-native-plants-to-detox-pfas-contaminated-water/

#SolarPunkSunday #PFAScontamination #ForeverChemicals #Remediation #PollutionSolutions #WaterIsLife #PFASPollution #Remediation #PFASRemoval #PFASRemediation

Legacy Mercury Contamination From Historical Gold Mining - A Visualization Tool For Spatial Data On Sediment, Water, And Biota In The Sierra Nevada, California
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https://ca.water.usgs.gov/sierra-mercury/ <-- shared technical article / storybook
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https://doi.org/10.5066/P9EL0UN9 <-- shared USGS technical report
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https://www.pbssocal.org/shows/earth-focus/mercury-in-our-waters-the-10-000-year-legacy-of-californias-gold-rush <-- shared media article
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#GIS #spatial #mapping #water #hydrology #sediment #biota #ecosystems #spatialanalysis #sampling #mercury #gold #goldmining #history #SierraNevada #goldrush #California #USA #contamination #humanimpacts #waterquality #hydraulicmining #minewaste #environment #methylmercury #watersecurity #publichealth #transportation #uptake #bioaccumulation #landmanagement #hotspots #remediation #ecology #mining
@USGS

Detecting vulnerable code in software dependencies is more complex than it seems https://www.helpnetsecurity.com/2024/09/18/henrik-plate-endor-labs-vulnerable-code-software-dependencies/ #vulnerabilitymanagement #cybersecurity #codeanalysis #remediation #opensource #Don'tmiss #EndorLabs #Features #Hotstuff #software #opinion #News #code #SCA

Tomorrow (Thurs, July 20) I'm hosting a webinar to share key findings from several years' worth of published research on vulnerability remediation. We have 8 data-packed reports to cover in ~30 minutes. To accomplish that, I've chosen two representative charts from each report - which was TOUGH!

Register here and let me know how you think I did: https://us02web.zoom.us/webinar/register/7316732996513/WN_FHnATAyWTzG_lsjH3PkbLQ#/registration

#vulnerability #vulnerabilities #devops #devsecops #vulnerabilitymanagement #vulnerability #vulnerabilityassessment #vulnerabilityscanning #exposuremanagement #remediation #cyberriskmanagement #informationsecurity #infosec #appsec #applicationsecurity #appsecurity

Excerpt from my latest Cyentia Institute blog post, “Patching, Fast and Slow”:

There are many ways one could measure how quickly vulnerabilities are patched. Most go with a simple average, but such point statistics are a poor representation of what’s really happening with remediation timeframes. Our favored method for this is survival analysis. I won’t get into the methodology here other than to say it tracks the “death” (remediation) of vulnerabilities over time to produce a curve that looks like the ones below comparing remediation speed among sectors.

The lesson? Get remediation strategy advice from your investment firm rather than your insurer, perhaps? We could ask a bunch of other questions about why certain organizations or industries struggle more than others to address vulnerabilities…but this isn’t that post. But I do suspect the “system” guiding the patching strategies of these organizations makes a big difference in the shape of their remediation curves.

You may have caught the title of this post being a reference to Daniel Kahneman’s book “Thinking, Fast and Slow.” That was partly because it’s catchy and fits the topic. But I also think there’s a parallel to be drawn from one of the main points of that book. Kahneman describes two basic types of thinking that drive human decision-making:

System 1: Fast, automatic, frequent, emotional, stereotypic, unconscious

System 2: Slow, effortful, infrequent, logical, calculating, conscious

Maybe you see where I’m headed here. I’m not saying we can boil all patching down to just two different approaches. But my experience and research support the notion that there are two broad systems at play. Many assets lend themselves to automated, fast deployment of patches without much additional preparation or evaluation (e.g., newer versions of Windows and OSX). Those fall under System 1 patching.

Other assets require manual intervention, testing, risk evaluation, or additional effort to deploy. That fits the System 2 definition well. The more your organization has to engage in System 2 rather than System 1 patching, the slower and shallower those remediation timelines will appear. Like normal decisions, we can’t do everything via System 1…some assets need that extra System 2 treatment. But problems (and/or delays) arise when there’s a mismatch between the system used and the decision (remediation) scenario.

My takeaway for vulnerability management programs? Use System 1 patching as much as possible and System 2 patching only where necessary.

See all the analysis leading up to this conclusion in the full post: https://www.cyentia.com/patching-fast-and-slow/

#patchmanagement #vulnerabilitymanagement #vulnerabilityassessment #vulnerabilities #exposuremanagement #riskmanagement #cyberriskmanagement #remediation #cve #appsec #appsecurity #secops #securityoperations #cybersecurity #infosec #infosecurity