通过溶液法人工合成不同C/S的C-S-H,分析比较了C-S-H对多种重金属离子俘获能力及其稳定性.研究结果表明,多种重金属离子共存下,低钙硅比C-S-H对重金属离子俘获主要以物理吸附为主,高钙硅比C-S-H对重金属离子的俘获则以化学结合主,其对重金属离子固化作用较前者稳定.无论钙硅比高低,多种离子共存下,C-S-H对Cu2+、Cd2+离子均有很强的固化能力,但对Pb2+离子的固化及稳定性较差.重金属离子价态不同,C-S-H俘获固化作用存大巨大差异,C-S-H对Cr3+俘获作用较强,但对Cr6+固化不起主要作用且稳定性较差.水化液相中Cr6+离子的存在,对pb2+离子在C-S-H中固化有极大影响.
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