Method for transforming arsenic sulfide slag and curing and stabilizing resulting compound by means of microencapsulation

摘要

#$%^&*AU2020102028A420201008.pdf#####ABSTRACT A method for transforming an arsenic sulfide slag and curing and stabilizing the resulting compound by means of microencapsulation, comprising the following steps: (1) preparing arsenic trioxide from the arsenic sulfide slag as a raw material; (2) preparing 4-hydroxy3-nitrophenylarsonic acid from the arsenic trioxide as a raw material; (3) induce-preparing an iron-manganese dinuclear cluster metal arsenate compound having a porous structure by using the 4-hydroxy-3-nitrophenylarsonic acid through transformation and solvent evaporation; (4) subjecting the iron-manganese dinuclear cluster metal arsenate compound having a porous structure to surface coating with silicon; (5) synthesizing an Fe(O)/Al-SBA-15 mesoporous composite stabilizer by a hydrothermal reaction; and (6) using the Fe(O)/Al-SBA-15 mesoporous composite stabilizer, an immobilized agent and an immobilizing enzyme for subjecting the iron-manganese dinuclear cluster metal arsenate compound coated with silicon to curing and stabilizing treatment by means of microencapsulation.