Study on the precipitation of iron and the synchronous removal mechanisms of antimony and arsenic in the AMD under the induction of carbonate rocks

Co-transport of ferrihydrite–organic matter colloids with Sb(v) in saturated porous media: implications for antimony mobility

“…This is likely because some Sb( v ) were not associated with FH–HA colloids and the transport of soluble Sb( v ) contributed to a C / C 0 value of 0.43. 77,78…”

“…This is likely because some Sb(V) were not associated with FH-HA colloids and the transport of soluble Sb(V) contributed to a C/C 0 value of 0.43. 77,78 3.4. Mathematical modeling FH-HA colloid transport was simulated by using a two-site kinetic attachment/detachment model that well captured the primary characteristics of FH-HA colloid transport with a persuasive correlation coefficient (R 2 >0.82) between the observed and the fitted data (Table 2).…”

Analysis of the development and effects of a combined treatment system for acid mine drainage via bio-oxidation and carbonate rock neutralization

“…The majority of precipitates in the carbonate rock neutralization section included goethite, lepidocrocite, iron hydroxide, and calcium sulfate, which was consistent with previous research results. 44 Because carbonate rock neutralization increased the pH of AMD to 5-7, Fe 3+ was hydrolyzed to form goethite, lepidocrocite, and iron hydroxide Environmental Science: Water Research & Technology Paper with better crystallinity. Simultaneously, with an increase in pH, schwertmannite and jarosite with inferior crystallinity were transformed into goethite and lepidocrocite with superior crystallinity.…”

Adsorption Characteristics of Heavy Metals Pb2+ and Zn2+ by Magnetic Biochar Obtained from Modified AMD Sludge

“…AMD sludge, with its large specific surface area and high surface activity, can immobilize heavy metals in solution by adsorption or co-precipitation and reduce heavy metal mobility and bioavailability [ 7 , 8 , 9 , 10 , 11 ]. AMD sludge has been used to adsorb phosphate [ 12 ], antimony [ 13 ], arsenic [ 14 ], phosphorus [ 15 ], and other chemicals. Studies have found that AMD sludge contains a significant amount of crystalline amorphous iron, aluminum, and calcium-based minerals, which have a noticeable adsorption effect.…”