铁盐改性柚子皮对含铬废水的吸附性能  

Adsorption performance of Fe(Ⅲ)-modified pomelo peel on wastewater containing Cr(Ⅵ)

作　　者：付宏渊[1] 邱祥[1] 王琼[2] 何忠明[1] FU Hongyuan QIU Xiang WANG Qiong HE Zhongming(School of Traffic and Transportation Engineering, Changsha University of Science and Technology, Changsha 410114, China School of Chemistry and Biological Engineering, Changsha University of Science and Technology, Changsha 410114, China)

机构地区：[1]长沙理工大学交通运输工程学院,湖南长沙410114 [2]长沙理工大学化学与生物工程学院,湖南长沙410114

出　　处：《中南大学学报（自然科学版）》2017年第9期2271-2278,共8页Journal of Central South University:Science and Technology

基　　金：国家科技支撑计划项目(2014BAC09B01-02);国家自然科学基金资助项目(51508079;51508042;51678073);浙江省交通运输厅科技项目(2014H22)~~

摘　　要：为探索生物质废弃物柚子皮资源化应用于含Cr^(6+)废水处理的可行性,研究采用以柚子皮为主要原料,通过调节柚子皮粉与改性剂FeCl_3的质量配比进行改性,将两者在常温下加水混合均匀后于(85±2)℃下烘干,粉碎后便可得到2种改性产物1号(FeCl_3质量分数为1%)和2号(FeCl_3质量分数为9%)。研究结果表明:1号产物对Cr^(6+)的最大单位吸附量为1.98 mg/g,吸附过程符合Langmuir吸附等温模型;而2号产物最大单位吸附量高达26.60mg/g,吸附反应动力学可用Freundlich吸附等温模型来描述;适当增大FeCl_3质量分数有利于提高改性柚子皮的吸附性能;改性柚子皮对Cr^(6+)的吸附去除可能是金属沉淀、静电吸附、絮凝作用和共沉淀作用的结果。To remove the chromium Cr^6＋ ion in waste water, the adsorbent of FeCl3-modified pomelo peel was manufactured by adjusting its mass ratio. Firstly, the two modified biomass adsorbents were obtained after the common processes, i.e. the stirring process of pre-synthesized powder mixtures of the pomelo-peel and FeCl3 in water under the ordinary temperature and the drying process at（85±2） ℃ for 24 h, with the sole difference in the mass fraction of FeCl3 being 1% for No.1 sample and 9% for No.2 sample, respectively. The results show that the maximum unit adsorption capacities of No.1 sample and No.2 sample are 1.98 mg/g and 26.6 mg/g, respectively, And the two samples can be depicted by the typical Isothermal Equations of Langmuir and Freundlich, respectively. The better property may be attributed to the properly higher ratio of FeCl3. The adsorbent of FeCl3-modified pomelo peel plays an important role in the chromium Cr^6＋ water treatment and the recycling utilization of the biomass material, which is attributed to the automatic-control of pH, easy-operation and nonexistence of secondary pollutions.

关 键 词：柚子皮 FECL3 六价铬 吸附 改性 

分 类 号：X712[环境科学与工程—环境工程]