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两性修饰红薯渣对紫色土吸附Cu2+的影响 |
Effect of Amphipathic Modified Sweet Potato Residue on Cu2+Adsorption in Purple Soils |
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DOI: |
中文关键词: Cu2+ 十二烷基二甲基甜菜碱 红薯渣 紫色土 两性修饰 吸附量 |
英文关键词: Cu2+ BS 12 Sweet potato residue Purple soils Amphoteric modification Adsorption capacity |
基金项目: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) |
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中文摘要: |
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)、PSR、PS100BS-R和PS200BS-R 4种混合土样。用批量处理法探究各供试土样对Cu2+的吸附等温特征,并考察温度、pH值和离子浓度对Cu2+吸附的影响。结果表明:各混合土样对Cu2+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,Cu2+吸附量呈现PS200BS-R>PS100BS-R>PSR>PS的趋势。温度和pH值升高均有利于Cu2+被吸附,当离子浓度为01 mol/L时吸附效果最佳。 |
英文摘要: |
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), PSR, PS100BS R and PS200BS R. The Cu2+ adsorption isothermal characteristic of each soil sample and the effects of temperature, pH value and ion concentration on Cu2+ adsorption were studied by batch method. The results showed the Cu2+ 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, Cu2+ adsorption presented a trend of PS200BS R>PS100BS R>PSR>PS. The increase of temperature and pH value was conducive to Cu2+ adsorption, the adsorption was the best when ion concentration was 01 mol/L. |
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