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As(V) Sorption/Desorption on Different Waste Materials and Soil Samples

Aiming to investigate the efficacy of different materials as bio-sorbents for the purification of As-polluted waters, batch-type experiments were employed to study As(V) sorption and desorption on oak ash, pine bark, hemp waste, mussel shell, pyritic material, and soil samples, as a function of the As(V) concentration added. Pyritic material and oak ash showed high sorption (90% and >87%) and low desorption (<2% and <7%). Alternatively, hemp waste showed low retention (16% sorption and 100%...

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Aiming to investigate the efficacy of different materials as bio-sorbents for the purification of As-polluted waters, batch-type experiments were employed to study As(V) sorption and desorption on oak ash, pine bark, hemp waste, mussel shell, pyritic material, and soil samples, as a function of the As(V) concentration added. Pyritic material and oak ash showed high sorption (90% and >87%) and low desorption (<2% and <7%). Alternatively, hemp waste showed low retention (16% sorption and 100% desorption of the amount previously sorbed), fine shell and pine bark sorbed <3% and desorbed 100%, the vineyard soil sample sorbed 8% and released 85%, and the forest soil sample sorbed 32% and desorbed 38%. Sorption data fitted well to the Langmuir and Freundlich models in the case of both soil samples and the pyritic material, but only to the Freundlich equation in the case of the various by-products. These results indicate that the pyritic material and oak ash can be considered efficient As(V) sorbents (thus, useful in remediation of contaminated sites and removal of that pollutant), even when As(V) concentrations up to 6 mmol L-1 are added, while the other materials that were tested cannot retain or remove As(V) from polluted media.

Keywords: arsenic retention/release; hemp waste; mussel shell; oak ash; pine bark.

Source: https://pubmed.ncbi.nlm.nih.gov/28753919/?utm_source=no_user_agent&utm_medium=rss&utm_campaign=pubmed-2&utm_content=1854v2hhZntXmjLwJ2c8ICqk5dHszkjKaegUwgxvTg53irEIHf&fc=20200804212743&ff=20200812014130&v=2.11.5

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Best CBD Deals

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Visit our community site for vetted suppliers at http://theCBD.place. It’s time that this subject was given more internet exposure. We are here to discuss topics related to medical marijuana and our experiences using CBD. Please do not assume that anyone here is a medical professional.

Source: https://www.reddit.com/r/CBD/comments/k3hxe7/best_cbd_deals/

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New to cbg

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Hey, I have really bad anxeity and I’m looking for a relief. I’ve been using cbd for a long time and it does not really help. Yesterday I heard about cbg and I saw a lot of positive reviews. I’m really scared of mental health issues. I have really bad experience with thc, and I herd that cbg effects are similar to thc effects. Do u have any experience with cbg and do u think that is safe?

Source: https://www.reddit.com/r/CBD/comments/k3h1z1/new_to_cbg/

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Celine designer handbags snatched from Melbourne CBD worth $12000

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Victoria Police are searching for two men after $12,000 worth of designer handbags were snatched from a store in Melbourne's CBD. Investigators … Source:

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