Method for controlling concentration of methyl arsenic in soil

• Main Authors: ZHAO QINGQING, NI ZHUOBIAO, GU TIANHANG, ZHANG WEIXIAN, QIU RONGLIANG
• Format: Patent
• Language: Chinese; English
• Published: 09.05.2023
• Subjects: DISPOSAL OF SOLID WASTE; PERFORMING OPERATIONS; RECLAMATION OF CONTAMINATED SOIL; RECLAMATION OF CONTAMINED SOIL SOIL; TRANSPORTING

The invention discloses a method for controlling the concentration of methyl arsenic in soil, and belongs to the technical field of soil remediation. The iron-based reducing material is mainly applied to the soil of the paddy field, arsenic in pore water of the paddy field is fixed, the arsenic concentration in the pore water of the soil of the paddy field is reduced, generation of methyl arsenic is blocked, and the content of arsenic in the pore water of the soil of the paddy field is reduced by removing electron acceptors such as sulfate radicals, nitrate radicals and ferric ions in the pore water of the soil. Electron transfer in the arsenic methylation process is inhibited, and the arsenic methylation process is blocked; meanwhile, dissolved oxygen in the soil pore water is removed, and hydrogen is generated, so that growth and metabolism of methanogens are promoted, demethylation of methyl arsenic is promoted, and the effect of inhibiting accumulation of methyl arsenic in the soil pore water is achieved.