摘要
以氧化石墨烯(GO)及铅[Pb(Ⅱ)]为主要试验材料,通过进行批量吸附试验及砂柱试验,研究GO对Pb(Ⅱ)在饱和多孔介质中运移的影响。批试验结果表明,与石英砂相比,GO具有极高的Pb(Ⅱ)吸附能力。柱试验结果表明,GO在饱和多孔介质中的运移能力较高,环境中Pb(Ⅱ)的存在则降低GO的运移;Pb(Ⅱ)在饱和多孔介质中运移能力相对较低,溶液中存在GO时,Pb(Ⅱ)在饱和多孔介质中的运移能力明显提高;将Pb(Ⅱ)污染后的砂柱注入GO悬液,被石英砂吸附的Pb(Ⅱ)能够随GO一起重新流出砂柱,且流出液中Pb(Ⅱ)的浓度与GO浓度呈良好的正相关。
Graphene oxide（GO）is a new nanomaterial rich in active functional sites, and may greatly influence heavy metal movements in the media. In this study, the effects of GO on lead[Pb（Ⅱ）] transport in saturated porous media were investigated. Batch experiments showed that GO had high adsorption capacity of Pb（Ⅱ）, compared with quartz sand. In saturated porous media, GO showed high mobility. However, the presence of Pb（Ⅱ） reduced the GO mobility. By contrast, Pb（Ⅱ） mobility was very low, but was promoted by GO. Lead（Ⅱ）preloaded in sand column was effectively mobilized by GO solution. The released Pb（Ⅱ）was significantly correlated with GO inputs（R20.95）.In summary, Pb reduced GO mobility, whereas GO promoted Pb transport in saturated porous media.
出处
《农业环境科学学报》
CAS
CSCD
北大核心
2016年第7期1392-1397,共6页
Journal of Agro-Environment Science
基金
国家自然科学基金-新疆联合项目(U1503282)
国家自然科学基金项目(41372234
41030746)
关键词
氧化石墨烯
铅
多孔介质
运移
释放
graphene oxide
lead
porous media
transport
release
