Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Iron salt modified magnesium phosphate arsenic fixing cement and preparation method thereof
The invention discloses ferric salt modified magnesium phosphate arsenic fixing cement and a preparation method thereof. The ferric salt modified magnesium phosphate arsenic fixing cement is prepared from the following raw materials: magnesium oxide, ferric salt, KH2PO4 or Ca (H2PO4) 2, arsenic-containing solid waste and a retarder. The preparation method comprises the following steps: uniformly mixing the magnesium oxide, the ferric salt, the monopotassium phosphate, the monocalcium phosphate, the arsenic-containing solid waste, the retarder and the like, adding water, stirring to obtain a mixture, pouring the mixture into a mold for molding, demolding, and curing in a curing box for 28 days. The method is simple in process flow and high in arsenic curing rate, has the characteristics of early strength and rapid hardening of magnesium phosphate cement, and also has a strong arsenic fixing effect. The arsenic leaching concentration of the solidified body is lt; and the toxicity test meets the TCLP requirement, and the filling gelling agent can be used as a filling gelling agent for efficiently and stably curing arsenic and is used for multiple scenes such as underground landfill, surface arsenic pollution coverage and mine area arsenic pollution treatment.
本发明公开了一种铁盐改性磷酸镁固砷水泥及其制备方法。所述的铁盐改性磷酸镁固砷水泥是由原料氧化镁、铁盐、KH2PO4或Ca(H2PO4)2、含砷固废和缓凝剂组成。制备方法是将氧化镁、铁盐、磷酸二氢钾、磷酸二氢钙、含砷固废和缓凝剂等混合均匀后，加入水，搅拌得到混合物，倒入模具中成型，脱模后放入养护箱养护28d。本发明工艺流程简单，砷固化率高，不仅有磷酸镁水泥早强快硬的特点，同时具备强效固砷效果。固化体砷浸出浓度<5mg/L，毒性测试满足TCLP的要求，可作为一种强效稳定固化砷的填充胶凝剂，用于地下填埋、表面砷污染覆盖以及矿区砷污染处理等多场景。
Iron salt modified magnesium phosphate arsenic fixing cement and preparation method thereof
The invention discloses ferric salt modified magnesium phosphate arsenic fixing cement and a preparation method thereof. The ferric salt modified magnesium phosphate arsenic fixing cement is prepared from the following raw materials: magnesium oxide, ferric salt, KH2PO4 or Ca (H2PO4) 2, arsenic-containing solid waste and a retarder. The preparation method comprises the following steps: uniformly mixing the magnesium oxide, the ferric salt, the monopotassium phosphate, the monocalcium phosphate, the arsenic-containing solid waste, the retarder and the like, adding water, stirring to obtain a mixture, pouring the mixture into a mold for molding, demolding, and curing in a curing box for 28 days. The method is simple in process flow and high in arsenic curing rate, has the characteristics of early strength and rapid hardening of magnesium phosphate cement, and also has a strong arsenic fixing effect. The arsenic leaching concentration of the solidified body is lt; and the toxicity test meets the TCLP requirement, and the filling gelling agent can be used as a filling gelling agent for efficiently and stably curing arsenic and is used for multiple scenes such as underground landfill, surface arsenic pollution coverage and mine area arsenic pollution treatment.
本发明公开了一种铁盐改性磷酸镁固砷水泥及其制备方法。所述的铁盐改性磷酸镁固砷水泥是由原料氧化镁、铁盐、KH2PO4或Ca(H2PO4)2、含砷固废和缓凝剂组成。制备方法是将氧化镁、铁盐、磷酸二氢钾、磷酸二氢钙、含砷固废和缓凝剂等混合均匀后，加入水，搅拌得到混合物，倒入模具中成型，脱模后放入养护箱养护28d。本发明工艺流程简单，砷固化率高，不仅有磷酸镁水泥早强快硬的特点，同时具备强效固砷效果。固化体砷浸出浓度<5mg/L，毒性测试满足TCLP的要求，可作为一种强效稳定固化砷的填充胶凝剂，用于地下填埋、表面砷污染覆盖以及矿区砷污染处理等多场景。
Iron salt modified magnesium phosphate arsenic fixing cement and preparation method thereof
一种铁盐改性磷酸镁固砷水泥及其制备方法
ZHOU XIAN (Autor:in) / SUN YANHUA (Autor:in) / YUE YOUCHENG (Autor:in) / LI HENG (Autor:in) / ZHANG WEI (Autor:in) / CHEN JINGE (Autor:in) / BAO CHONGJUN (Autor:in) / YAO LIJIA (Autor:in) / ZHAO QINGXU (Autor:in) / XU FUSHUN (Autor:in)
08.11.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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