Soil heavy metal passivator as well as preparation method and application thereof

• Main Authors: WU PANPAN, QIAO GUIFANG, ZHANG XUEHUA, YANG SUFEN, ZHANG WENJING, LIU RUI, CHEN QIULI, GU LIMIN, LIU HUIWAN, GUO GE, ZHANG YANLING
• Format: Patent
• Language: Chinese; English
• Published: 08.03.2022
• Subjects: ADHESIVES; CHEMISTRY; DYES; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; POLISHES

The invention belongs to the technical field of resources and environment, and particularly relates to a soil heavy metal passivator and a preparation method and application thereof. The passivator is prepared from the following raw materials in parts by weight: 40-50 parts of modified charcoal and 10-20 parts of an activating agent, the modified biochar is obtained by mixing biomass charcoal with an oxyacid solution, reacting at 75-95 DEG C for 80-120 minutes, and filtering. The passivator not only has the capability of repairing the heavy metal contaminated soil, but also can improve the content of organic matters in the soil and promote the growth of plants. 本发明属于资源与环境技术领域，具体涉及一种土壤重金属钝化剂及其制备方法、应用。该钝化剂按重量份数计由以下原料制成：改性生物炭40-50份及活化剂10-20份；改性生物炭是将生物质炭与含氧酸溶液混合，在75℃-95℃条件下反应80-120min，过滤后所得。该钝化剂不仅具有修复重金属污染土壤的能力，还能够提高土壤中有机质的含量，并促进植物的生长。