Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Composite cementitious material and method for fixing heavy metals by using composite cementitious material
The invention relates to the technical field of wastewater treatment, in particular to a composite cementing material and a method for fixing heavy metals by using the composite cementing material. The method for curing the heavy metals comprises the following steps: S1, adjusting the pH value of a solution containing the heavy metals to 1-3 to obtain mixing water A; s2, mixing the inorganic cementing material, the mixing water A and the mixing water B to obtain mixed slurry, and then performing curing and curing; wherein the inorganic cementing material comprises Portland cement clinker, sulphoaluminate cement clinker and gypsum; the mixing water B is a hydrated calcium silicate water solution. According to the method, the pH value of the heavy metal-containing solution is optimized when the heavy metal is solidified, so that the anti-leaching effect of the cement-based cementing material after the heavy metal is solidified can be effectively enhanced, the leaching concentration of the heavy metal is reduced, and meanwhile, the mechanical property of the cementing material after the heavy metal is solidified can be improved.
本发明涉及废水处理技术领域，尤其涉及一种复合胶凝材料及其固定重金属的方法。所述固化重金属的方法包括：S1：将含重金属溶液的pH值调整为1～3，得到拌合水A；S2：将无机胶凝材料、拌合水A与拌合水B混合，得到混合浆料，而后进行养护固化；其中，所述无机胶凝材料包括硅酸盐水泥熟料、硫铝酸盐水泥熟料和石膏；所述拌合水B为水化硅酸钙水溶液。本发明通过在固化重金属时优化含重金属溶液的pH值，能够有效增强水泥基胶凝材料固化中重金属后的防浸出效果，降低重金属的浸出浓度，同时还能提高固化重金属后胶凝材料的力学性能。
Composite cementitious material and method for fixing heavy metals by using composite cementitious material
The invention relates to the technical field of wastewater treatment, in particular to a composite cementing material and a method for fixing heavy metals by using the composite cementing material. The method for curing the heavy metals comprises the following steps: S1, adjusting the pH value of a solution containing the heavy metals to 1-3 to obtain mixing water A; s2, mixing the inorganic cementing material, the mixing water A and the mixing water B to obtain mixed slurry, and then performing curing and curing; wherein the inorganic cementing material comprises Portland cement clinker, sulphoaluminate cement clinker and gypsum; the mixing water B is a hydrated calcium silicate water solution. According to the method, the pH value of the heavy metal-containing solution is optimized when the heavy metal is solidified, so that the anti-leaching effect of the cement-based cementing material after the heavy metal is solidified can be effectively enhanced, the leaching concentration of the heavy metal is reduced, and meanwhile, the mechanical property of the cementing material after the heavy metal is solidified can be improved.
本发明涉及废水处理技术领域，尤其涉及一种复合胶凝材料及其固定重金属的方法。所述固化重金属的方法包括：S1：将含重金属溶液的pH值调整为1～3，得到拌合水A；S2：将无机胶凝材料、拌合水A与拌合水B混合，得到混合浆料，而后进行养护固化；其中，所述无机胶凝材料包括硅酸盐水泥熟料、硫铝酸盐水泥熟料和石膏；所述拌合水B为水化硅酸钙水溶液。本发明通过在固化重金属时优化含重金属溶液的pH值，能够有效增强水泥基胶凝材料固化中重金属后的防浸出效果，降低重金属的浸出浓度，同时还能提高固化重金属后胶凝材料的力学性能。
Composite cementitious material and method for fixing heavy metals by using composite cementitious material
一种复合胶凝材料及其固定重金属的方法
CUI SUPING (Autor:in) / WANG ZIHAO (Autor:in) / WANG YALI (Autor:in) / SUN DAWEI (Autor:in) / ZHANG FENG (Autor:in)
12.03.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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