首页|期刊简介|投稿指南|分类索引|刊文选读|订阅指南|证明资料|样刊邮寄查询|常见问题解答|联系我们
王向辉,杨雪,王闯,等. 改性椰壳生物炭对甲基橙的吸附效果与机制[J]. 科学技术与工程, 2020, 20(27): 11371-11377.
王向辉,Yang Xue,Wang Chuang,et al.Effects and Mechanisms of Methyl Orange Removal from Aqueous Solutions by Algal Biochar[J].Science Technology and Engineering,2020,20(27):11371-11377.
改性椰壳生物炭对甲基橙的吸附效果与机制
Effects and Mechanisms of Methyl Orange Removal from Aqueous Solutions by Algal Biochar
投稿时间:2020-02-19  修订日期:2020-06-27
DOI:
中文关键词:  椰壳  吸附  椰壳生物炭  甲基橙 ( MO)
英文关键词:Coconut shell  adsorption  algal biochar methyl orange ( MO)
基金项目:海南省重点研发计划项目-社会发展方向(ZDYF2018170),教育部创新团队项目(IRT-16R19),海南师范大学大学生创新项目。
                       
作者单位
王向辉 海南师范大学
杨雪 海南师范大学
王闯 海南师范大学
宫旖柔 海南师范大学
田越 海南师范大学
李仁巧 海南师范大学
刘艳玲 海南师范大学
史载锋 海南师范大学
摘要点击次数: 191
全文下载次数: 66
中文摘要:
      本文以椰壳为原料制备椰壳生物炭,并用于甲基橙(MO)的吸附。通过扫描电镜 (SEM)、红外光谱(FT-IR)、氮吸附(BET)、元素分析(EA)等对椰壳生物炭物化性质进行了表征,分析了活化剂种类、浸渍比、热解温度和热解时间等因素对 MO 吸附效果的影响。结果表明活化剂为KOH,浸渍比为 3:1,热解温度是700 ℃,热解时间270 min,制备的生物炭K3CBc700270比表面积为126 1.93 m2?g-1,平均孔径1.10 nm,具有优异的甲基橙去除效果,当甲基橙浓度为100 mg?L-1,添加量为5 mg,吸附时间270 min,MO去除达到95.31 %。研究吸附机制发现吸附等温线数据拟合符合Langmuir 模型,吸附动力学数据拟合符合拟二级动力学模型,说明吸附以化学单层吸附为主,物理吸附为辅。结果证明椰壳生物炭K3CBc700270具有开发为去除水染料污染物吸附剂的潜力。
英文摘要:
      Coconut biochar is preparation from coconut hust as raw materials, and used for methyl orange adsorption. The physical and chemical properties of biochar were analyzed by scanning electron microscopy (SEM), fourier infrared spectroscopy (FT-IR),N2-adsorption(BET) and elemental analysis (EA). The types of modifiers,impregnation ratio, pyrolysis temperature and time were analyzed to determine the effects on the characteristics of biochar and the adsorption capacity of methyl orange (MO). The results showed that the biochar (K3CBc700270) prepared at 700 ℃ for 270 minutes, with a mass ratio of 3:1 ( KOH∶coconut shell) had the highest adsorption capacity for MO, and the specific surface area is 126 1.93 m2?g-1 and average pore size is 1.10 nm. The removal rate of methyl orange attained 95.31 % , when the concentration of methyl orange is 100mg ? L-1, the addition amount is 5 mg, the adsorption time is 240 min. The adsorption data fitted well with the pseudo-second order kinetic model and Langmuir isotherm model,which indicated that chemical adsorption was the main adsorption mechanism and physical adsorption was the auxiliary adsorption mechanism. The results showed that the biochar K3CBc700270 is potentially applicable as an adsorbent of dyes present in contaminated waters.
查看全文  查看/发表评论  下载PDF阅读器
关闭
你是第34870022位访问者
版权所有:科学技术与工程编辑部
主管:中国科学技术协会    主办:中国技术经济学会
Tel:(010)62118920 E-mail:stae@vip.163.com
京ICP备05035734号-4
技术支持:本系统由北京勤云科技发展有限公司设计

京公网安备 11010802029091号