A Study in the Adsorption Behaviors of Cr (VI) on Crosslinked Amphoteric Starches Synthesized through Using the Microwave Radiation Method

2009 ◽  
Vol 87-88 ◽  
pp. 387-392 ◽  
Author(s):  
Li Xia Zou ◽  
Qing Cheng Liu ◽  
Qiong Xu ◽  
Jing Hua Rong
Keyword(s):  
Adsorption Capacity ◽  
Microwave Radiation ◽  
Quaternary Ammonium ◽  
Langmuir Isotherm ◽  
Degree Of Substitution ◽  
Modified Starch ◽  
Radiation Method ◽  
Adsorption Behaviors ◽  
Anionic Groups ◽  
Microwave Radiation Method

Crosslinked amphoteric starches (CAS) with quaternary ammonium cationic and carboxymethyl anionic groups were prepared by a microwave radiation method. Their adsorption behavior for Cr(VI) was investigated. The results showed that high the degree of substitution (DS) of modified starch was favorable to the synthesis by the microwave heating and crosslinked amphoteric starches prepared with higher the adsorption capacity than by the drying reaction. The adsorption capacity increases with the increasing cationic groups and decreased with increasing degree of substitution of anionic groups. The adsorption capacity was found to follow the Langmuir isotherm.

Facile synthesis and enhanced microwave absorption properties of anthracite-based carbon/Ni3Fe/NiO ternary composites

2020 ◽  
Vol 44 (33) ◽  
pp. 13962-13970
Author(s):  
Hengdong Ren ◽  
Jialin Ma ◽  
Jun Zhou ◽  
Xiangfeng Shu ◽  
Zhenying Liu ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
Microwave Radiation ◽  
Low Frequency ◽  
Microwave Absorber ◽  
Facile Synthesis ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Radiation Method ◽  
Microwave Radiation Method

A low-frequency microwave absorber was synthesized by using a microwave radiation method.

The Characterization and Photocatalytic Properties of Mesoporous WO3•0.33H2O•NiO Nanocrystalline Synthesized through Using the Microwave Radiation Method

2009 ◽  
Vol 60-61 ◽  
pp. 480-485 ◽  
Author(s):  
Li Xia Zou ◽  
Qing Cheng Liu ◽  
Qing Zhong ◽  
Xiu Ming Bai ◽  
Li Jun Dong
Keyword(s):  
Photocatalytic Activity ◽  
Microwave Radiation ◽  
High Surface ◽  
High Surface Area ◽  
Soxhlet Extraction ◽  
Nitrogen Adsorption ◽  
Radiation Method ◽  
Xrd Patterns ◽  
Gaseous Formaldehyde ◽  
Microwave Radiation Method

Mesoporous WO3•0.33H2O was synthesized by the microwave radiation method using surfactant as the template-directing agent, and the template was removed by Soxhlet extraction. The degree of framework substitution had been monitored by means of powder X-ray diffraction (XRD), nitrogen adsorption, and UV-vis diffuse reflectance (DRUV) spectroscopy techniques. Nitrogen adsorption data and XRD patterns confirmed that, the structure, high surface area, and uniform pore size distribution were maintained in the crystallized samples. The photocatalytic activity for the photo-oxidation of gaseous formaldehyde on the mesoporous WO3•0.33H2O synthesized was improved by NiO loading, the photocatalytic activity was higher than both that of the materials synthesized using calcination in high temperature and commercial Degussa P25 TiO2 under visible light and UV irradiation.

Rapid synthesis of mesoporous silica by an accelerated microwave radiation method

2004 ◽  
Vol 21 (6) ◽  
pp. 1224-1230 ◽  
Author(s):  
Myung-Geun Song ◽  
Jong-Yun Kim ◽  
Sung-Ho Cho ◽  
Jong-Duk Kim
Keyword(s):  
Mesoporous Silica ◽  
Microwave Radiation ◽  
Rapid Synthesis ◽  
Radiation Method ◽  
Microwave Radiation Method

scholarly journals Fabrication of Carboxymethylcellulose/Metal-Organic Framework Beads for Removal of Pb(II) from Aqueous Solution

Materials ◽  
2019 ◽  
Vol 12 (6) ◽  
pp. 942 ◽  
Author(s):  
Huo-Xi Jin ◽  
Hong Xu ◽  
Nan Wang ◽  
Li-Ye Yang ◽  
Yang-Guang Wang ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Adsorption Capacity ◽  
Photoelectron Spectroscopy ◽  
Langmuir Isotherm ◽  
Adsorption Equilibrium ◽  
Isotherm Model ◽  
Maximum Adsorption Capacity ◽  
X Ray ◽  
Metal Organic ◽  
Langmuir Isotherm Model

The ability to remove toxic heavy metals, such as Pb(II), from the environment is an important objective from both human-health and ecological perspectives. Herein, we describe the fabrication of a novel carboxymethylcellulose-coated metal organic material (MOF-5–CMC) adsorbent that removed lead ions from aqueous solutions. The adsorption material was characterized by Fourier-transform infrared spectroscopy, X-ray diffractometry, scanning electron microscopy, and X-ray photoelectron spectroscopy. We studied the functions of the contact time, pH, the original concentration of the Pb(II) solution, and adsorption temperature on adsorption capacity. MOF-5–CMC beads exhibit good adsorption performance; the maximum adsorption capacity obtained from the Langmuir isotherm-model is 322.58 mg/g, and the adsorption equilibrium was reached in 120 min at a concentration of 300 mg/L. The adsorption kinetics is well described by pseudo-second-order kinetics, and the adsorption equilibrium data are well fitted to the Langmuir isotherm model (R2 = 0.988). Thermodynamics experiments indicate that the adsorption process is both spontaneous and endothermic. In addition, the adsorbent is reusable. We conclude that MOF-5–CMC is a good adsorbent that can be used to remove Pb(II) from aqueous solutions.

Quaternary Ammonium Groups Modified Starch Microspheres for Instant Hemorrhage Control

2017 ◽  
Vol 159 ◽  
pp. 937-944 ◽  
Author(s):  
Fangping Chen ◽  
Xiaoyan Cao ◽  
Junxia Yu ◽  
Huantong Su ◽  
Shuda Wei ◽  
...  
Keyword(s):  
Quaternary Ammonium ◽  
Modified Starch ◽  
Hemorrhage Control
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