期刊论文

Wang, P.

中文

环境科学学报

0253-2468

2016

36

6

2059-2066

10.13671/j.hjkxxb.2015.0627

(No.2015SK2004-3):湖南省重点研发计划项目 (No.15K147):湖南省高校创新平台开放基金项目 (No.2015SK2004-3) and the University Innovation Platform Open Foundation of Hunan Province (No.15K147):Supported by the Key Resarch and Development Plan of Hunan Province

本校为第一且通讯机构

鉴于单一常规方法对硅藻土吸附性能的改善空间有限,为了显著改善硅藻土的吸附性能,应用酸活化-钠化-柱撑-焙烧复合改性工艺对硅藻土实施了改性,并通过扫描电镜(SEM) 、X射线衍射(XRD)和红外光谱(IR)对硅藻土改性前后微观形貌、物相组成和官能团的变化进行了分析,探究了硅藻土改性前后对Cd~(2+)的吸附能力与机制.结果表明,最佳复合改性工艺条件为:硫酸体积分数10%,NaCl质量分数6%,OH/Al摩尔比2.2,焙烧温度150 ℃;改性后,硅藻土对Cd~(2+)的吸附容量由原来的5.44 mg?g~(-1)提升至9.60 mg?g~(-1),提升了76.5%;改性前后硅藻土对Cd~(2+)的吸附均符合Langmuir等温吸附模型和二级动力学模型,吸附以物理过...

As an alternative solution to overcome the limitation in conventional single-methods for material modification, a composite modification technology (acid activating-Na modifying-pillaring-baking) was applied to improve diatomite adsorption capacity. The changes in micro-morphology, phase composition and functional groups of the modified diatomite were analyzed by using Scanning Electron Microscope (SEM), X-ray Diffraction (XRD) and Infrared Spectrum (IR). The behavior and the mechanism of Cd2+ ion adsorption onto diatomite were analyzed before ...