城市道桥与防洪
城市道橋與防洪
성시도교여방홍
URBAN ROADS BRIDGES & FLOOD CONTROL
2009年
7期
229-231
,共3页
载铁颗粒活性炭%吸附%铬%动力学%热力学%废水%饮用水%水处理
載鐵顆粒活性炭%吸附%鉻%動力學%熱力學%廢水%飲用水%水處理
재철과립활성탄%흡부%락%동역학%열역학%폐수%음용수%수처리
iron oxide coated granular activated carbon%adsorption%chromium%dynamics%thermodynamics%wastewater%drinking water%water treatment
该文通过吸附动力学实验及等温吸附实验,考察了在10℃～40℃的温度条件下载铁颗粒活性炭(10CGAC)吸附Cr(Ⅵ)的热动力学性质.结果表明:准二级反应动力学模型及Langmuir等温吸附模型可分别较好地描述IOCGAC对Cr(Ⅵ)的吸附动力学及吸附等温线实验结果(R2>0.99);吸附速率及吸附容量随温度的增加而增加.吸附速率k从0.000 22增加到0.00033,吸附容量从18.48 mg/g增加到23.20 mg/g.根据标准吉布斯自由能变(△G<'0><0)和标准反应焓变(△H<'0>>0)值判断,IOCGAC对Cr(VI)的吸附是自发的、吸热的化学吸附反应.
該文通過吸附動力學實驗及等溫吸附實驗,攷察瞭在10℃～40℃的溫度條件下載鐵顆粒活性炭(10CGAC)吸附Cr(Ⅵ)的熱動力學性質.結果錶明:準二級反應動力學模型及Langmuir等溫吸附模型可分彆較好地描述IOCGAC對Cr(Ⅵ)的吸附動力學及吸附等溫線實驗結果(R2>0.99);吸附速率及吸附容量隨溫度的增加而增加.吸附速率k從0.000 22增加到0.00033,吸附容量從18.48 mg/g增加到23.20 mg/g.根據標準吉佈斯自由能變(△G<'0><0)和標準反應焓變(△H<'0>>0)值判斷,IOCGAC對Cr(VI)的吸附是自髮的、吸熱的化學吸附反應.
해문통과흡부동역학실험급등온흡부실험,고찰료재10℃～40℃적온도조건하재철과립활성탄(10CGAC)흡부Cr(Ⅵ)적열동역학성질.결과표명:준이급반응동역학모형급Langmuir등온흡부모형가분별교호지묘술IOCGAC대Cr(Ⅵ)적흡부동역학급흡부등온선실험결과(R2>0.99);흡부속솔급흡부용량수온도적증가이증가.흡부속솔k종0.000 22증가도0.00033,흡부용량종18.48 mg/g증가도23.20 mg/g.근거표준길포사자유능변(△G<'0><0)화표준반응함변(△H<'0>>0)치판단,IOCGAC대Cr(VI)적흡부시자발적、흡열적화학흡부반응.
Through the adsorption dynamics experiment and the isothermal adsorption experiment, the article reviews the thermodynamics character of adsorption to Cr(VI) by IOCGAC under the condition of 10℃～40℃ temperature. The result makes clear that the quasi-second reaction dynamics model and Langmuir isothermal adsorption model can separately better describe the adsorption dynamics of IOCGA to Cr (CI) and its adsorption isotherm experimental result (R2>0.99), and adsorption velocity and adsorption capacity which is increased with the raising of temperature. The adsorption velocity K increases from 0.00022 to 0.00033, and the adsorption capacity increases from 18.48 mg/g to 23.20 mg/g. Based on the typical XX free energy change (△G°< 0) and the typical reaction enthalpy change (△ H°> 0) values, it is judged that the adsorption of IOCGA to Cr (Ⅵ) is spontaneous and endothermal chemical adsorption reaction.
