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Method for fixing lead by steel slag-metakaolin-based geopolymer material
The invention relates to a method for fixing lead by a steel slag-metakaolin-based geopolymer material, and belongs to the technical field of heavy metal lead pollution treatment and solid waste comprehensive utilization. The method comprises the following steps: adding sodium hydroxide into a sodium silicate solution, uniformly mixing, standing for 16-20 hours to obtain an alkali activator, uniformly mixing steel slag powder and metakaolin powder to obtain mixed powder, adding a lead nitrate solution into the mixed powder, uniformly stirring, adding an alkali activator solution, and uniformly stirring to obtain mixed slurry; and pouring the mixed slurry into a mold, sealing, standing at room temperature for 24-36 hours, demolding, and maintaining at constant temperature and humidity for 6-8 days. The solid waste is completely utilized to treat lead pollution, the geopolymer material is synthesized under the action of the alkali activator, the lead fixing effect is achieved through physical adsorption and ion exchange, the lead leaching toxicity is extremely low, and the geopolymer material can also be applied to the building industry due to the excellent compressive strength.
本发明涉及一种钢渣‑偏高岭土基地聚物材料固铅的方法，属于重金属铅污染治理和固废综合利用技术领域。本发明将氢氧化钠加入到硅酸钠溶液中混合均匀，静置16～20小时得到碱激活剂，将钢渣粉和偏高岭土粉混合均匀得到混合粉料，将硝酸铅溶液加入到混合粉料中搅拌均匀，再加入碱激活剂溶液并搅拌均匀得到混合浆料；将混合浆料倒入模具中并密封，室温下静置24～36h后脱模，再恒温恒湿养护6～8天。本发明完全利用固废处理铅污染，在碱激活剂作用下合成地聚物材料，通过物理吸附和离子交换的方式达到固铅效果，铅浸出毒性极低，同时其优良的抗压强度也可应用在建筑行业。
Method for fixing lead by steel slag-metakaolin-based geopolymer material
The invention relates to a method for fixing lead by a steel slag-metakaolin-based geopolymer material, and belongs to the technical field of heavy metal lead pollution treatment and solid waste comprehensive utilization. The method comprises the following steps: adding sodium hydroxide into a sodium silicate solution, uniformly mixing, standing for 16-20 hours to obtain an alkali activator, uniformly mixing steel slag powder and metakaolin powder to obtain mixed powder, adding a lead nitrate solution into the mixed powder, uniformly stirring, adding an alkali activator solution, and uniformly stirring to obtain mixed slurry; and pouring the mixed slurry into a mold, sealing, standing at room temperature for 24-36 hours, demolding, and maintaining at constant temperature and humidity for 6-8 days. The solid waste is completely utilized to treat lead pollution, the geopolymer material is synthesized under the action of the alkali activator, the lead fixing effect is achieved through physical adsorption and ion exchange, the lead leaching toxicity is extremely low, and the geopolymer material can also be applied to the building industry due to the excellent compressive strength.
本发明涉及一种钢渣‑偏高岭土基地聚物材料固铅的方法，属于重金属铅污染治理和固废综合利用技术领域。本发明将氢氧化钠加入到硅酸钠溶液中混合均匀，静置16～20小时得到碱激活剂，将钢渣粉和偏高岭土粉混合均匀得到混合粉料，将硝酸铅溶液加入到混合粉料中搅拌均匀，再加入碱激活剂溶液并搅拌均匀得到混合浆料；将混合浆料倒入模具中并密封，室温下静置24～36h后脱模，再恒温恒湿养护6～8天。本发明完全利用固废处理铅污染，在碱激活剂作用下合成地聚物材料，通过物理吸附和离子交换的方式达到固铅效果，铅浸出毒性极低，同时其优良的抗压强度也可应用在建筑行业。
Method for fixing lead by steel slag-metakaolin-based geopolymer material
一种钢渣-偏高岭土基地聚物材料固铅的方法
ZHANG ZHENGFU (author) / YANG HUI (author) / ZHOU XIAN (author) / LIU YANG (author)
2021-09-14
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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