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- W2801355957 abstract "A series of biochars were prepared from rice(RI), tobacco(TO), corn(CO), wheat(WH), millet(MI), and black bean straw(BB). These biochars were used to study the mechanism of elemental mercury(Hg0) adsorption by hydrochloric acid modified biochars. The biochars were modified by 1 M hydrochloric acid (HCl) and then used in a fixed-bed Hg0 adsorption experiment. As would be expected, the results indicated that HCl modification increased the Hg0 adsorption performance of the six biochars. After modification, the Hg0 adsorption efficiency of tobacco biochar increased from 8.2% to 100.0%, and the average Hg0 adsorption capacity of the biochars increased by 61 times. The acid modification dissolved the metal compounds in the biochar, reducing the metal content and increasing the average surface area of the biochar. The average surface area of the raw biochars increased from 29.9 to 110.1 m2/g after HCl modification. The extra surface area was mostly created in the micropores, leading to a significant increase in the amount of micropores. These micropores effectively adsorbed the Cl atoms, which acted as active sites for Hg0. In the adsorption process, Hg0 diffused into the interior of modified biochars via mesopores, and finally the adsorbed Cl in the micropores reacted with Hg0 to form HgCl2." @default.
- W2801355957 created "2018-05-17" @default.
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- W2801355957 date "2018-10-01" @default.
- W2801355957 modified "2023-10-16" @default.
- W2801355957 title "Increasing the chlorine active sites in the micropores of biochar for improved mercury adsorption" @default.
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- W2801355957 doi "https://doi.org/10.1016/j.fuel.2018.05.028" @default.
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