DOI: 10.11799/ce202602024
Experimental study on bio-chemical synergistic resource utilization of high-iron acid mine water
LI Fuqin
ZHAO Haoyu
LIU Huida
WU Landie
LI Sisi
Abstract：To address the challenges posed by the high cost and substantial sludge volume of conventional lime neutralization methods for acid mine water(AMD)with elevated iron content,a synergistic biological-chemical resource treatment process based on immobilized Thiobacillus ferrooxidans was developed.The application of carrier immobilization technology enhanced biological oxidation efficiency,with the Fe2+oxidation rate reaching 250 mg/(L·h)and an oxidation efficiency of 99%under conditions of 30℃,a gas-to-water ratio of 150∶1,and a hydraulic retention time of 3.5 hours,which led to stable and highly efficient oxidation of the influent Fe2+concentration of 797 mg/L.The stepwise precipitation method was then adopted for the selective recovery of iron resources,with the pH level of 3.5～4.0 being regulated by NaOH.The precipitation product was analyzed by XRF,which showed that the quality of Fe2 O3 accounts for 93%of the total.The residual pollutants met the standard after secondary neutralization and precipitation.The integration of biological oxidation and stepwise precipitation technology within this process established a closed-loop system for pollution control and resource recovery,thereby providing a sustainable solution for the efficient recovery and eco-friendly management of iron resources in high iron-containing AMD.
Keywords：acid mine waterbiological-chemical synergyimmobilized Thiobacillus ferrooxidansstepwise precipitationresourcing
Publication Date：2026-02-20
Online Publishing Date：2026-03-23(First online date of this platform, not the publication date of the document)
Pages：6( 191-196 )