#remediation — Public Fediverse posts

🌎 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
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#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

These are some #oyster beds that I'm working with many others to restore to healthier states in #SaanichInlet on #VancouverIsland . Colonialism & capitalist industry that followed destroyed many #seafood sources for local #Indigenous & local settlers. There was once big clam/ #shellfish gardens & mid tide fish traps in inlet that all got destroyed. There's #remediation project happening now & it will be decades before it's done.

New York Times: "When Help Shows Up After a House Fire, It Might Be Gang Members. Prosecutors say a former leader of the Bloods has single-handedly remade the emergency mitigation industry in New York through intimidation and brute force." #fire #remediation #HouseFires #NYC #bloods #crips #gangs (GIFT LINK) https://www.nytimes.com/2023/08/03/nyregion/fire-truck-chasers-gangs-nyc.html?unlocked_article_code=xwK_YwlB19w8KOliRQSzcTAarM-r4AbCcysdlgZTJRom45HKgy2NQNlpoCpXl9AOD6dfgoK0J6Hns13n9MMxA5b2cSkUUSInwGwU8KRnO660BgLRvEiC63kS_rt4lIrm8sK7hi0L8GER9ZfJ9qLKaP0WTVpWpsLvXzi-WI_qD7odGPLjHipYdHQBnlf0GkPYOWUOfe7se-4MV8rQgthCPXkEYEg_kkOfYp25a_CzYs2RSCb8xCpAGpN7FXG4k5WhanZc0_vdgV74ITEoZh9GpnZj3Ieqs-YxvswvOadTXCdsAfmyzkvO--eXj1qyociVZHJsXZzeroieXNbnIpkOUGi42m1J2ug&smid=url-share