期刊论文

Preparation of Poly-hydroxy-aluminum Pillared Diatomite and Characteristics of Cu~(2+), Zn~(2+)Adsorption on the Pillar in Aqueous Solutions

Wang, Ping(csfuwp@163.com)

中文

环境科学

0250-3301

2016

37

8

3177-3185

10.13227/j.hjkx.2016.08.045

2015SK20043:湖南省重点研发计划项目 15K147:湖南省高等学校创新平台开放基金 13K070:湖南省高等学校创新平台开放基金 YB2015B031:湖南省优秀博士学位论文获得者科研项目 :科技计划 0369:***人才科研启动基金 2310006:湖南省环境科学重点学科建设基金项目

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鉴于天然硅藻土因理化构造缺陷而导致的吸附性能局限性和传统物化方法对硅藻土改性效果的有限性,为了显著改善硅藻土的吸附性能,采用聚羟基铝对硅藻土实施了柱撑改性.通过扫描电镜(SEM)、红外光谱(FTIR)、 X射线衍射(XRD)分析了硅藻土柱撑前后理化特性的变化,并考察了柱撑前后硅藻土表面性能及其对Cu~(2+)、 Zn~(2+)吸附特性的差异.结果表明,硅藻土最佳柱撑条件为n(OH~-)/n(Al~(3+))=2.2、 KCl浓度1.8 mol?L~(-1)、 Al/土比10 mmol?g~(-1)、反应温度60℃、反应时间24 h、老化温度200℃、老化时间0.5 h.柱撑后,聚羟基铝被成功置入硅藻壳体内部,形成了有效柱体,增大了孔道间距,拓展了吸附反应界面...

As an alternative solution to the limitations in adsorption properties of natural diatomite caused by its physicochemical structure defects and modification effects to diatomite using conventional physical/chemical methods, the diatomite was pillared using poly-hydroxy-aluminum to improve its adsorption properties. The change in physicochemical characteristics of the diatomite before and after pillaring were analyzed by Scanning Electron Microscope (SEM), Fourier Transform Infrared (FTIR) and X-ray Diffraction (XRD). The difference in surface properties of diatomite and its adsorption characte...