Abstract
以Mg Al-CO32–水滑石(LDH)焙烧产物(LDO)为重金属离子去除剂,在单一Cu2+、Cr(Ⅵ)体系和Cu2+/Cr(Ⅵ)共存体系中探究了LDO对重金属离子的去除性能,并结合对金属-LDO复合体的XRD、FT-IR和SEM表征阐明了双金属(Cr(Ⅵ)阴离子+Cu2+阳离子)在LDO上的去除机理。结果表明,Cr(Ⅵ)和Cu2+在LDO上的吸附表现为多重相互作用的协同吸附效应。除了Cu2+的Jahn-Teller效应和氢键协同多体效应外,Cu2+-Cr O42–-LDO体系还发生静电作用、水合作用、配位作用以及共沉淀和继沉淀作用,形成了Mg-Al-Cu三元复合体。
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