性做久久久久久坡多野结衣-性做久久久久久久久浪潮-性欲影院-性影院-国产精品线路一线路二-国产精品兄妹在线观看麻豆

產品展廳收藏該商鋪

您好 登錄 注冊

當前位置:
美國布魯克海文儀器公司>技術文章>測量應用案例-20190701

技術文章

測量應用案例-20190701

閱讀:234          發布時間:2019-7-22

文獻名: Thermodynamic and Kinetic Parameters of Adsorption of Heavy Metals Ions on Magnetic Composite Sorbent

 

作者: Kharlyamov, Damir A.; Albutova, Darya A.; Denisova, Tatiana R.; Mavrin, Gennady V.; Suleimanov, Ilnar F.

 

 

摘要:The process of adsorption of Cr6+, Cu2+ and Ni2+ ions on the magnetic composite sorbent (MCS) that obtained by magnetite deposition on the surface of wood fiber waste was studied. The research of adsorption of the considered heavy metal ions (HMI) was carried out in a static mode in a neutral and acidic medium at temperatures of 288, 298, 308 K. It was found that with increasing temperature, the adsorption capacity MCS increases, that indicates the chemical nature of the forces holding HMI on the composite surface. The adsorption capacity of MCS decreases in an acidic medium, and when the temperature decreases. Adsorption capacities MCS were calculated and adsorption isotherms HMI were constructed based on the obtained data. The adsorption capacity for Cr6+ ions was 1.47 mmol/g in a neutral medium at 298 K, for Cu2+ ions—1.09 mmol/g, for Ni2+ ions—0.60 mmol/g. It is determined that the Langmuir equation the best describes adsorption process with approximation coefficients R 2 more than 0.998. From the data of treatment of adsorption isotherms, it follows that the adsorption processes of HMI on MCS relate to the processes of chemical adsorption. Kinetic dependences were obtained under static conditions in a neutral medium at different temperatures. For determining the limiting stage of adsorption, the obtained experimental data are processed using different kinetic models: diffusion model, pseudo-first and pseudo-second order models. It is found that adsorption process the best describes a pseudo-second order model, that assumes that the chemical reaction of the exchange limits the adsorption process.

收藏該商鋪

登錄 后再收藏

提示

您的留言已提交成功!我們將在第一時間回復您~

對比框

產品對比 產品對比 聯系電話 二維碼 意見反饋 在線交流

掃一掃訪問手機商鋪
010-62081908
在線留言
主站蜘蛛池模板: 那曲县| 龙川县| 拉孜县| 阿鲁科尔沁旗| 会泽县| 苍南县| 师宗县| 社会| 格尔木市| 苍溪县| 上虞市| 安溪县| 顺昌县| 肃南| 永州市| 郓城县| 盐源县| 镇赉县| 缙云县| 海城市| 宜兴市| 文化| 霸州市| 迁西县| 中西区| 马龙县| 牙克石市| 大庆市| 常山县| 武夷山市| 延安市| 南安市| 边坝县| 麻江县| 峨眉山市| 皮山县| 乌拉特前旗| 丰原市| 西华县| 容城县| 读书|