China, study for the removal of Cr(VI) by biochar
Chromium is widely present in the leather processing process, but it should only be the trivalent one, less harmful to humans and the environment. However, it is sometimes found as a production residue resulting from the treatment of sludge produced from tannery waste. A study on the thermochemical decomposition of oily sludge experiments with how to mitigate pollution and obtain charcoal-like substance known as Biochar, which can improve carbon sequestration and soil fertility. [Removal of Cr(VI) by biochar derived via co-pyrolysis of oily ... - Nature]
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