Al(Ⅲ)改性胶原蛋白絮凝材料的结构表征及对废弃钻井液絮凝的研究

Study on characterization and flocculation of flocculant based on collagen protein modified by Al(Ⅲ)

利用鞣制化学中铝鞣机理,将Al(Ⅲ)络合在明胶水解得到的胶原蛋白分子上,制备Al(Ⅲ)改性胶原蛋白絮凝材料,利用XRD、荧光光谱和XPS对产物结构及作用机理进行表征与分析。将所制备的絮凝剂用于油田废弃钻井液的絮凝,以其CODCr去除率和悬浮物含量为指标,考察了絮凝条件对废弃钻井液处理效果的影响。结果表明胶原蛋白分子与Al(Ⅲ)间发生了配位反应,制备出了Al(Ⅲ)改性胶原蛋白絮凝剂。其用于废弃钻井液絮凝时,用量为20.7g/L,pH值为6～9,温度为20～40℃。絮凝后,废弃钻井液CODCr去除率达80.1%,悬浮物含量从初始的2115mg/L降至190mg/L,絮凝效果明显。

Under aluminium tanning mechanism in tanning chemical,Al（Ⅲ） was combined on collagen protein which obtained by the hydrolysis of gelatin.So Al（Ⅲ） modified collagen flocculant was prepared.The structure of products and the reaction mechanism are characterized and analyzed by XRD,fluorescence spectrum and XPS.When using the prepared flocculant in the treatment of waste drilling water,the influence of flocculation conditions on the treatment effect was studied by CODCr removal rate and suspended solids content.The result indicated that a coordination reaction occurred between collagen protein and Al（Ⅲ）.When used to flocculate waste drilling water,the dosage of the prepared flocculant was 20.7g/L,pH was 6-9 and temperature was 20-40℃.After flocculation,the CODCr removal rate was 80.1% and suspended solids content decreased from 2115mg/L to 190mg/L.