铝盐改性石英砂制备及其吸附性能研究  

Experimental Study on Preparation and Adsorption Capability of Aluminum Salt Modifi ed Sands

作　　者：丁春生[1] 蒋志元[1] 张德华[2] 缪佳[1] 

机构地区：[1]浙江工业大学建筑工程学院,杭州310032 [2]昆明理工大学环境科学与工程学院,昆明650093

出　　处：《非金属矿》2009年第5期17-20,共4页Non-Metallic Mines

基　　金：浙江省科技计划项目(2007C33056);浙江工业大学环境工程重中之重学科开放基金资助

摘　　要：以石英砂为载体,用反复加热蒸干法制备了铝盐改性砂,分别考察了铝盐改性砂对有机物和Zn2+的吸附性能及其影响因素。结果表明,在pH值为中性条件下,铝盐改性砂吸附效果优于石英原砂,铝盐改性砂对CODCr的去除率比石英原砂提高20%,对UV254的去除率提高了10%左右;铝盐改性砂对Zn2+去除能力比原砂有较大的提高,在pH值中性条件下,石英原砂Zn2+的去除率为43%左右,铝盐改性砂对Zn2+去除率达到70%;随着Zn2+初始浓度的增大,铝盐改性砂对Zn2+的去除率逐渐减少;当改性剂浓度逐渐增大时,Zn2+的去除率逐渐增大,当浓度达到1.25mol/L后,Zn2+的去除率不再提高;铝盐改性砂对Zn2+的去除率随着pH值的升高而提高,当pH值为9时,去除率达90%。In this experiment, quartz sand was chosen as a carrier to be coated with aluminum salt by repeated heating and drying process, and then its adsorption capability and influencing factors for organic matter and Zn^2＋ were investigated, respectively. The results showed that under the condition of a neutral pH value, the adsorption capability of the aluminum-modified sand was better than that of the raw quartz sand, and the removal of COD and UV254 by the aluminum-modified sand were increased by about 20% and 10% respectively compared to the raw quartz. In addition, the removal of Zn^2＋ by the aluminum-modified sand had also been improved greatly under the same condition; and the removal of Zn^2＋ by the aluminummodified sand reached 70%, which was higher than that by raw quartz sand with the removal of 43%. It was also found that the removal of Zn^2＋ by the aluminum-modified sand was reduced with the increase of initial concentration of Zn^2＋. However, the removal of Zn^2＋ was increased with the increase of modifier concentration, and the removal was no longer increased when the modifier concentration reached 1.25 mol/L. Moreover, the removal of Zn^2＋ by the aluminum-modified sand was also increased with the pH value increased, and when the pH value was 9, the removal is up to 90%.

关 键 词：铝盐改性砂 制备 除锌 吸附性能 

分 类 号：X703[环境科学与工程—环境工程] TD97[矿业工程—选矿]