Adsorption of cobalt by using inorganic components of sediment samples from water bodies

来源 :国际泥沙研究(英文版) | 被引量 : 0次 | 上传用户:dangerwind
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
The adsorption of cobalt ions was evaluated using sediment samples from water bodies to investigate the adsorption properties of sediment and the behavior of these natural materials in the presence of nuclear and industrial waste.The two sediments (S1 and S2) were treated to eliminate humic and fulvic acids and then they were characterized by several techniques.The minerals found in both the sediments (X-ray diffraction) were quartz and albite;plus,goethite and muscovite in S1,and kaolinite and montmorillonite in S2.Point of zero charge (PZC) of S1 and S2 was 6.00 and 5.22,respectively.The specific area of S1 (63.3 m2/g) is higher than S2 (1.5 m2/g).Adsorption kinetics data for S1 and S2 were best fitted to the pseudo second-order model.The removal efficiency of S1 for cobalt was 96% with an adsorption capacity (qe) of 0.93 mg/g,and for S2 was 45% with a qe of 0.40 mg/g.The experimental data of the adsorption isotherms were adjusted to Langmuir and Freundlich models for S1 and S2,respectively.The thermodynamic parameters (enthalpy,entropy,and Gibb's free energy) indicated that the adsorption processes were endothermic,spontaneous,and chemisorption mechanism.The results show that the adsorption capacities of the sediments depend on their composition.These water sediments have important adsorption properties for cobalt,and they can be used in the treatment of nuclear and industrial aqueous wastes.
其他文献
采用溶胶–凝胶法制备了具有钙钛矿型结构的La0.6Sr0.4Co1–yFeyO3–δ(LSCF,y=0.2,0.5或0.8)氧化物,然后以相转化烧结技术制备了LSCF中空纤维透氧膜,考察了凝固浴与Co/Fe摩
SiC单晶衬底中的微管缺陷对SiC基器件是一种致命的缺陷,会严重影响SiC功率器件的成品率.基于物理气相传输(PVT)法,通过改进生长设计装配制备了绝对零微管缺陷6 in的n型4H-SiC
内镜治疗作为门脉高压食管胃静脉曲张控制出血与预防再出血的主要治疗手段,近年来内镜下食管胃静脉曲张的诊疗不断地走向个体化、精准、全程管理模式.通过病史、体检、实验室
目的 通过CT多平面重组技术分析先天性单侧骨性鼻泪管发育异常儿童骨性鼻泪管的解剖特征.方法 回顾性病例研究.收集2015年1月至2020年1月在保定儿童医院眼科就诊的11例单侧先
“我是李亚鹏,一个大家不太熟悉的创业者。”当李亚鹏出现在黑马创交会的舞台上,会场立刻骚动起来,大家都好奇,这位明星创业者会发表怎样的感慨?没想到,李亚鹏用真诚平实的语
Monitoring sediment transport is essential for managing and maintaining rivers.Estimation of the sediment load in rivers is fundamental for the study of sedimen
The purpose of the current study is to compare the influence of different aerobic conditions (biostimulation (BS),bioaugmentation (BA),and a combination of bios
文学史上素朴地歌咏人生的安稳的作品很少,倒是强调人生的飞扬的作品多,但好的作品,还是在于它是以人生的安稳做底子来描写人生的飞扬的。没有这底子,飞扬只能是浮沫,许多强
体育作为一门以身体练习为主要手段,以增进中小学生健康为主要目的的学科,不仅是学校教学中不可缺少的一部分,也是学生健全发展,形成终身锻炼意识的重要组成部分.那么,在素质
以Ti、Si和天然鳞片石墨(GF)为原料,通过自蔓延高温合成法(SHS)在GF表面制备TiC/SiC复合包覆层并用作低碳Al2O3–C耐火材料的新型碳源;利用X射线衍射、扫描电子显微镜和能谱