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Chromium and fluoride sorption/desorption on un-amended and waste-amended forest and vineyard soils and pyritic material

Using batch-type experiments, chromium (Cr(VI)) and fluoride (F^(-)) sorption/desorption were studied in forest and vineyard soil samples, pyritic material, pine bark, oak ash, hemp waste and mussel shell, as well as on samples of forest and vineyard soil, and of pyritic material, individually treated with 48 t ha^(-1) of pine bark, oak ash, and mussel shell. Pine bark showed the highest Cr(VI) sorption (always > 97% of the concentration added) and low desorption (<1.5%). Pyritic material sorbed...

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Using batch-type experiments, chromium (Cr(VI)) and fluoride (F) sorption/desorption were studied in forest and vineyard soil samples, pyritic material, pine bark, oak ash, hemp waste and mussel shell, as well as on samples of forest and vineyard soil, and of pyritic material, individually treated with 48 t ha-1 of pine bark, oak ash, and mussel shell. Pine bark showed the highest Cr(VI) sorption (always > 97% of the concentration added) and low desorption (<1.5%). Pyritic material sorbed between 55 and 98%, and desorbed between 0.6 and 9%. Forest and vineyard soils, oak ash, mussel shell and hemp waste showed Cr(VI) sorption always < 32%, and desorption between 22 and 100%. Pine bark also showed the highest F retention (sorption between 62 and 73%, desorption between 10 and 15%), followed by oak ash (sorption 60-69%, desorption 11-14%), forest soil (sorption 60-73%, desorption 19-36%), and pyritic material (sorption 60-67%, desorption 13-15%), whereas in vineyard sorption was 49-64%, and desorption 24-27%, and in hemp waste sorption was 26-36%, and desorption 41-59%. Sorption data showed better fitting to the Freundlich than to the Langmuir model, especially in the case of Cr(VI), indicating that multilayer sorption dominated. The addition of by-products to the forest and vineyard soils, and to the pyritic material, caused an overall increase in F sorption, and decreased desorption. Furthermore, the pine bark amendment resulted in increases in Cr(VI) retention by both soils and the pyritic material. These results could be useful to favor the recycling of the by-products studied, aiding in the management of soils and degraded areas affected by Cr(VI) and F pollution, and in the removal of both anions from polluted waters.

Keywords: By-products; Cr(VI) pollution; F(−) pollution; Release; Retention.

Source: https://pubmed.ncbi.nlm.nih.gov/29800861/?utm_source=no_user_agent&utm_medium=rss&utm_campaign=pubmed-2&utm_content=1854v2hhZntXmjLwJ2c8ICqk5dHszkjKaegUwgxvTg53irEIHf&fc=20200804212743&ff=20200811031832&v=2.11.5

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What is one of the strongest CBD in vaping form?

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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.

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Source: https://www.reddit.com/r/CBD/comments/m0zvtg/what_is_one_of_the_strongest_cbd_in_vaping_form/

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Anzac Day march increased to 5000 in Sydney's CBD

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Any veteran who wishes to participate in the Sydney CBD march will be required to register via the RSL NSW website.

In previous years, veterans and their descendants have not been required to register to march, with more than 12,000 taking to Sydney’s streets in 2019.

Earlier on Tuesday, Mr Morrison said he would like to see Anzac Day celebrations “return to normal as much as we possibly can”.

“I respect ultimately these are calls that have got to be made by state governments, but I want Anzac Day on,” he told reporters in Sydney.

“If people can party, and if people can protest, then we can remember as a nation and honour our veterans on Anzac Day. And I would like to see that done as fully and as safely as possible.”

In 2020, Anzac Day marches across Australia were cancelled as the nation entered strict coronavirus restrictions. In lieu of the march, “Light Up the Dawn” driveway services were held in neighbourhoods across the country.

Tuesday marked NSW’s 51st consecutive day of no locally acquired coronavirus cases.

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Source: https://www.google.com/url?rct=j&sa=t&url=https://www.smh.com.au/national/nsw/anzac-day-march-increased-to-5000-in-sydney-s-cbd-20210309-p5792r.html&ct=ga&cd=CAIyGjQ2MzM1ZTBkNWQyZmIyYzc6Y29tOmVuOlVT&usg=AFQjCNGJKXeFEPybOePsWcm_wHfdMbTZww

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Anzac Day march increased to 5000 in Sydney's CBD

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The Anzac Day march in Sydney's CBD will be capped at 5000 after RSL NSW reached an agreement with the NSW government and police to … Checkout PrimeXBT
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