两性修饰红薯渣对紫色土吸附Cu^2+的影响  

Effect of Amphipathic Modified Sweet Potato Residue on Cu^2+ Adsorption in Purple Soils

作　　者：李文斌 鄢心雨 沈蝶 何丽华 叶勇 何海霞 张乂方 陈芯怡 LI Wen-bin;YAN Xin-yu;SHEN Die;HE Li-hua;YE Yong;HE Hai-xia;ZHANG Yi-fang;CHEN Xin-yi(College of Environmental Science and Engineering,China West Normal University,Nanchong,Sichuan 637009,China)

机构地区：[1]西华师范大学环境科学与工程学院,四川南充637009

出　　处：《环境监测管理与技术》2020年第5期60-62,71,共4页The Administration and Technique of Environmental Monitoring

基　　金：国家自然科学基金资助项目(41271244);四川省教育厅基金资助项目(18ZB0576);四川省科技厅基金资助项目(2018JY0224);南充市科技局基金资助项目(19YFZJ010G)。

摘　　要：采用十二烷基二甲基甜菜碱对红薯渣(R)做两性修饰,修饰比例分别为0、100%和200%,将得到的3种两性修饰红薯渣(R、100BS-R和200BS-R)以1%质量分数加入紫色土(PS)中,制成PS(对照)、PS_R、PS_(100BS-R)和PS_(200BS-R) 4种混合土样。用批量处理法探究各供试土样对Cu^(2+)的吸附等温特征,并考察温度、pH值和离子浓度对Cu^(2+)吸附的影响。结果表明:各混合土样对Cu^(2+)的吸附等温线均符合Langmuir模型,最大吸附量为99.46 mmol/kg^136.53 mmol/kg,Cu^(2+)吸附量呈现PS_(200BS-R)>PS_(100BS-R)>PS_R>PS的趋势。温度和pH值升高均有利于Cu^(2+)被吸附,当离子浓度为0.1 mol/L时吸附效果最佳。Sweet potato residue was modified by dodecyl dimethyl betaine(BS-12)with the modification ratio of 0,100%and 200%,respectively.1%mass fraction of these three modified materials were added to purple soil for preparing 4 mixed oil samples:PS(Contrast),PS R,PS 100BS-R and PS 200BS-R.The Cu 2+adsorption isothermal characteristic of each soil sample and the effects of temperature,pH value and ion concentration on Cu 2+adsorption were studied by batch method.The results showed the Cu 2+adsorption isotherm of each mixed soil sample was accorded with Langmuir model.The maximum adsorption capacity ranged from 99.46 mmol/kg to 136.53 mmol/kg,Cu 2+adsorption presented a trend of PS 200BS-R>PS 100BS-R>PS R>PS.The increase of temperature and pH value was conducive to Cu 2+adsorption,the adsorption was the best when ion concentration was 0.1 mol/L.

关 键 词：CU^2+ 十二烷基二甲基甜菜碱 红薯渣 紫色土 两性修饰 吸附量 

分 类 号：X53[环境科学与工程—环境工程]