聚烯丙基氯化铵调控的中空多孔磷酸八钙超结构及其对Pb(Ⅱ)的吸附特性  

Poly(allylamine hydrochliride)modulated superstructures of porous and hollow octacalcium phosphate and its excellent adsorption capacity of Pb(Ⅱ)

作　　者：朱建华[1,2] 舒家才 黄鑫怡 岳晓君 ZHU Jianhua;SHU Jiacai;HUANG Xinyi;YUE Xiaojun(Anhui Province Key Laboratory of Metallurgy Engineering&Resources Reoycling,Anhui University of Technology,Ma'anshan 243002;Key Lakoratory of Metallurgical Emission Reduction&Resources Reeycling of Ministry of Education,Anhui University of Technology,Ma'anshan 243002)

机构地区：[1]安徽工业大学,安徽省冶金工程与资源综合利用重点实验室,马鞍山243002 [2]安徽工业大学,冶金减排与资源综合利用教育部重点实验室,马鞍山243002

出　　处：《环境科学学报》2021年第6期2147-2155,共9页Acta Scientiae Circumstantiae

基　　金：安徽省高校自然科学基金(No.KJ2020A0256);安徽省高校协同创新项目(No.GXXT-2019-15,GXXT-2020-072)。

摘　　要：环境友好、价格低廉且易于批量化生产的矿物基吸附剂在环境污染物去除方面越来越显现出其优越性,但以往的研究多集中于晶相的矿物吸附剂,有关亚稳相的研究相对较少.因此,本文通过仿生矿化的方法,以聚烯丙基氯化铵(PAH)作为生长调节剂,在气相扩散过程中成功制备了由超薄纳米片构筑的中空、多孔磷酸八钙(Octacalcium Phosphate,OCP)微球.结果发现,制备的吸附剂具有较高的比表面积和孔隙率,且高分辨电镜图片显示其具有一定的非晶纳米区域,并对重金属离子Pb(Ⅱ)表现出优越的吸附特性.吸附实验证明,OCP/PAH对Pb(Ⅱ)的吸附符合Langmuir等温吸附模型和准二级吸附动力学模型,最高吸附量可达1644.74 mg·g^(-1).该亚稳相矿物吸附剂出色的重金属吸附性能,为开发新型矿物吸附剂提供了新思路.Mineral adsorbents,which are environmentally friendly,low-cost and easy to mass produce,are widely used due to their high performance for pollutants removal.Although the crystalline adsorbents were frequently studied previously,metastable mineral adsorbents are rarely reported.In this paper,porous and hollow octacalcium phosphate(OCP)microspheres constructed by ultrathin nanosheets via the biomimetic mineralization approach using polyallylammonium chloride(PAH)as a growth regulator.Amorphous nanoregions were observed at the edge of composed nanosheets.The resultant adsorbents with high specific surface area and porosity show superior adsorption on heavy metal of Pb(Ⅱ).Experimental results reveal that the adsorption curves conform well to the Langmuir adsorption thermodynamic model and the secondary adsorption dynamics model.And the highest adsorption capacity can be 1644.74 mg·g^(-1).The biomimetic mineralization procedures for synthesis of the metalstable adsorbents with the excellent adsorption property provide a new idea for design new mineral adsorbents.

关 键 词：仿生矿化 磷酸八钙 多孔微球 非晶纳米区域 重金属吸附 

分 类 号：X703[环境科学与工程—环境工程]