海藻酸钠凝胶球对铬(Ⅵ)的去除效果研究  

Study on Sodium Alginate Gel Bead Removing Cr(Ⅵ)

作　　者：孙伟光[1] 邢佳[1] 邹海虹[1] 陈丽春[1] 

机构地区：[1]黑龙江省环境保护科学研究院,黑龙江哈尔滨150056

出　　处：《现代农业科技》2015年第10期208-209,215,共3页Modern Agricultural Science and Technology

基　　金：国家水体污染控制与治理科技重大专项(2012ZX07201002)

摘　　要：研究海藻酸钠-钙凝胶球、海藻酸钠-铁(Ⅲ)凝胶球对废水中的铬(Ⅵ)的去除效果。结果表明:对50 m L(10 mg/L)的模拟废水进行吸附,海藻酸钠-铁(Ⅲ)凝胶球的吸附效果较好,而海藻酸钠-钙凝胶球对铬(Ⅵ)几乎不发生吸附作用。铬(Ⅵ)的去除率随吸附时间的增加而提高,吸附240 min后,海藻酸钠-铁(Ⅲ)凝胶球对铬(Ⅵ)的去除率可达99%以上,海藻酸钠-铁(Ⅲ)凝胶球在酸性条件下比较稳定,在强碱性条件下易被分解,海藻酸钠-铁(Ⅲ)凝胶球吸附铬(Ⅵ)的吸附等温线符合Langmuir型,最大吸附量为11.827 mg/g。利用海藻酸钠-铁(Ⅲ)凝胶球去除废水中的铬(Ⅵ)具有工艺简单、处理效率高、速度快等优点。The adsorption experiment of chromium（VI）in waste water was carried by sodium alginate-calcium gel beads and sodium alginate- iron （ Ⅲ ）gel beads. The results showed that the adsorption effect of sodium alginate-iron （ Ⅲ ）was better than that of sodium alginate-calcium when 50 mL （10 mg/L）simulated waste water was dealt with. The removal efficiency of chromium （VI）in waste water increased with the increase of adsorption time. The chromium （Vl）removal efficiency of sodium alginate-iron （ Ⅲ ）was more than 99% after 240 minutes ,while sodium alginate-calcium could hardly adsorb ehromium（VI）. Sodium alginate-iron （llI ）gel bead was stable under acid condition and was apt to decompose under alkali condition. The chromium（VI）adsorption isotherm of sodium alglnate-iron（ Ⅲ ）gel bead accorded with Lmagmuir model and the maximal adsorption amount was 11.827 mg/g. The removal of chromium （VI）in waste water by sodium alginate-iron （ Ⅲ ）gel bead was of simple technique, its have high efficiency and fast speed.

关 键 词：海藻酸钠-铁(Ⅲ)凝胶球 海藻酸钠-钙凝胶球 铬(VI) 吸附等温线 

分 类 号：X52[环境科学与工程—环境工程]