| 程之宽,喻清,张攀,杨发光,田嘉豪,宋子贺,李照鹏.油茶壳基活性炭的微波制备及其对U(Ⅵ)的吸附[J].南华大学学报(自然科学版),2019,33(1):16~21.[CHENG Zhikuan,YU Qing,ZHANG Pan,YANG Faguang,TIAN Jiahao,SONG Zihe,LI Zhaopeng.The Preparation of Activated Carbon from Camellia Oleifera Shell by Microwave Radiation and its Adsorption of Uranium[J].Journal of University of South China(Science and Technology),2019,33(1):16~21.] |
| 油茶壳基活性炭的微波制备及其对U(Ⅵ)的吸附 |
| The Preparation of Activated Carbon from Camellia Oleifera Shell by Microwave Radiation and its Adsorption of Uranium |
| 投稿时间：2018-09-07 |
| DOI： |
| 中文关键词: 油茶壳 微波 活性炭 吸附 铀 |
| 英文关键词:Camellia oleifera shell microwave activated carbon adsorption U(VI) |
| 基金项目:国家自然科学基金项目(51774187;51804164);湖南省自然科学基金项目(2017JJ3274;2018JJ3448);湖南省科技厅重点研发计划课题项目(2017SK2280);湖南省教育厅重点科研基金项目(17A184);湖南省大学生研究性学习和创新性实验计划项目(2016314);金属矿山安全与健康国家重点实验室开放课题(zdsys2018-007) |
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| 中文摘要: |
| 以油茶壳为原料,氯化锌为活化剂,采用微波活化制备油茶壳基活性炭。通过测定活性炭的碘吸附值,探究了氯化锌活化剂质量浓度、微波辐照时间、活化剂浸渍时间对所制备活性炭吸附性能的影响;并将制得的最优活性炭进行铀吸附实验,通过扫描电镜(scanning electron microscope,SEM)、能谱分析(energy dispersive spectrometer,EDS)、傅里叶红外光谱分析(Fourier transform infrared spectrometer,FTIR)对油茶壳基活性炭进行表征,探讨其吸附铀的机理。实验结果表明:采用700 W的微波功率,当氯化锌活化剂质量浓度为300 g/L,活化剂浸渍时间为24 h,微波辐照时间为90 s时,所制得油茶壳基活性炭碘吸附值为769.9 mg/g;在溶液pH=6、初始铀质量浓度为5 mg/L、油茶壳基活性炭投加量为1 g/L、吸附时间为6 h时,油茶壳基活性炭对铀的吸附率为98.75%,铀的吸附量为4.94 mg/g。油茶壳基活性炭对 U(Ⅵ)的吸附是一种以物理吸附、活性炭表面的－COOH、－OH等官能团与铀酰离子的络合作用并存的吸附方式。 |
| 英文摘要: |
| Using Camellia oleifera shell as main materials,zinc chloride as activator,activated carbon from Camellia oleifera shell by microwave radiation was prepared.The effects of zinc chloride activator concentration,microwave irradiation time and soaking time of activator on the adsorption properties of activated carbon were investigated by measuring the iodine adsorption value of activated carbon.And the optimum activated carbon was used for adsorption experiments of U(VI).In addition,scanning electron microscope (SEM),energy dispersive spectrometer (EDS) and fourier transform infrared spectroscopy (FTIR) were used to characterize the adsorption mechanism of U(VI) by Camellia oleifera shell activated carbon.The results showed that,using 700 W microwave power,the iodine adsorption value of Camellia oleifera shell activated carbon was 769.9 mg/g when the concentration of zinc chloride activator was 300 g/L,the soaking time of activator was 24 h,and the microwave irradiation time was 1 min 30 s.When the pH of solution was 6,the initial concentration of U(VI) was 5 mg/L,the dosage of Camellia oleifera shell activated carbon was 1 g/L and the adsorption time was 6 h,the adsorption rate of Camellia oleifera shell activated carbon on U(VI) was 98.75% and the adsorption amount of U(VI) was 4.94 mg/g.The adsorption of Camellia oleifera shell activated carbon on U(VI) was a kind of adsorption mode in which the physical adsorption and complexation of uranyl ions with functional groups such as －COOH and －OH on the surface of activated carbon coexisted. |
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