Urea/nitric acid co-impregnated pitch-based activated carbon fiber for the effective removal of formaldehyde

2019 ◽  
Vol 80 ◽  
pp. 98-105 ◽  
Author(s):  
Dong-Yeon Ryu ◽  
Takaaki Shimohara ◽  
Koji Nakabayashi ◽  
Jin Miyawaki ◽  
Joo-Il Park ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Nitric Acid ◽  
Carbon Fiber ◽  
Activated Carbon Fiber ◽  
Effective Removal

Effect of Modification with Nitric Acid and Hydrogen Peroxide on Chromium (VI) Adsorption by Activated Carbon Fiber

2012 ◽  
Vol 518-523 ◽  
pp. 2099-2103
Author(s):  
Guang Zhou Qu ◽  
Hai Bing Ji ◽  
Ran Xiao ◽  
Dong Li Liang
Keyword(s):  
Hydrogen Peroxide ◽  
Activated Carbon ◽  
Nitric Acid ◽  
Carbon Fiber ◽  
Adsorption Capacity ◽  
Adsorption Kinetics ◽  
Ph Value ◽  
Activated Carbon Fiber ◽  
Order Kinetic ◽  
Adsorption Amount

The activated carbon fiber (ACF) was treated by different concentration nitric acid (HNO3) and hydrogen peroxide (H2O2) oxidization to enhance its adsorption capacity to hexavalent chromium (Cr6+) ion. The adsorption amount and adsorption kinetics of Cr6+ion on ACFs, and the surface chemical groups were investigated. The results showed that the modified ACFs with 1% HNO3and 10% H2O2had a better adsorption capacity, respectively. The adsorption amount of ACFs was affected strongly solution pH value, and decreased significantly with increasing of the pH value. The adsorption kinetics indicated that the adsorption rates of Cr6+ ion on different modified ACFs were well fitted with the pseudo-second-order kinetic model. After 1% HNO3and 10% H2O2modification, respectively, the total acidic oxygen-containing groups on ACFs surface had an increase obviously, which might be enhance the adsorption amount of Cr6+ion on ACFs.

scholarly journals Modified Activated Carbon Fiber Felt for the Electrosorption of Norfloxacin in Aqueous Solution

2020 ◽  
Vol 12 (10) ◽  
pp. 3986
Author(s):  
Xianzhen Li ◽  
Yue Hu ◽  
Diao She ◽  
Wei-Bo Shen
Keyword(s):  
Activated Carbon ◽  
Nitric Acid ◽  
Carbon Fiber ◽  
Activated Carbon Fiber ◽  
Order Kinetic ◽  
Human Beings ◽  
Adsorption Effect ◽  
Regeneration Rate ◽  
Modified Activated Carbon ◽  
Carbon Fiber Felt

As an antibiotic, Norfloxacin (NOR) is widely found in the water environment and presents considerable harm to human beings. At present, the preparation of removal materials is complicated, and the removal efficiency is not high. The adsorption effect of modified activated carbon fiber felt (MACFF) electrosorption and its influencing factors on NOR were studied. Activated carbon fiber felt (ACFF) was modified with 20% nitric acid, and the ACFFs were characterized by SEM, TEM, and FTIR both before and after modification. The optimal working conditions for electrosorption with an MACFF electrode were as follows: the voltage was 1.0 V, the pH was 6, and the plate spacing was 10 mm. The maximum adsorption capacity of the MACFF for NOR was 128.55 mg/g. Model fitting showed that pseudo-second-order kinetic model and Langmuir model were more suitable for explaining this adsorption process. In addition, this study found that, with 20% nitric acid as the regeneration liquid and under the reverse charging method, the regeneration rate of the MACFF electrode was maintained at approximately 96% and the regeneration was good, therefore, this technology can not only save operation costs but also has good development prospects in sewage treatment.

Asymmetric capacitive deionization utilizing nitric acid treated activated carbon fiber as the cathode

2015 ◽  
Vol 176 ◽  
pp. 426-433 ◽  
Author(s):  
Tingting Wu ◽  
Gang Wang ◽  
Qiang Dong ◽  
Bingqing Qian ◽  
Yulan Meng ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Nitric Acid ◽  
Carbon Fiber ◽  
Activated Carbon Fiber ◽  
Capacitive Deionization

scholarly journals Behaviors of Cellulose-Based Activated Carbon Fiber for Acetaldehyde Adsorption at Low Concentration

2019 ◽  
Vol 10 (1) ◽  
pp. 25
Author(s):  
Dong-Yeon Ryu ◽  
Koji Nakabayashi ◽  
Takaaki Shimohara ◽  
Ueda Morio ◽  
Isao Mochida ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Carbon Fiber ◽  
Activated Carbon Fiber ◽  
Low Concentration ◽  
Flight Mass Spectrometry ◽  
Effective Removal ◽  
Wide Range ◽  
Volatile Organic ◽  
Group A ◽  
Group 1

The toxic nature of acetaldehyde renders its removal from a wide range of materials highly desirable. Removal of low-concentration acetaldehyde (a group 1 carcinogenic volatile organic compound) using an adsorbent of cellulose-based activated carbon fiber modified by amine functional group (A@CACF-H) is proposed, using 2 ppm of acetaldehyde balanced with N2/O2 (79/21% v/v) observed under continuous flow, with a total flow rate of 100 mL/min over 50 mg of A@CACF-H. The effective removal of the targeted acetaldehyde is achieved by introducing the functionalized amine at optimized content. The removal mechanism of A@CACF-H is elucidated using two-dimensional gas chromatography coupled with time-of-flight mass spectrometry (2D-GC TOF-MS), indicating the efficacy of the proposed acetaldehyde removal method.

Modification of activated carbon fiber pore structure by coke deposition

2001 ◽  
Vol 11 (PR3) ◽  
pp. Pr3-279-Pr3-286
Author(s):  
X. Dabou ◽  
P. Samaras ◽  
G. P. Sakellaropoulos
Keyword(s):  
Activated Carbon ◽  
Carbon Fiber ◽  
Pore Structure ◽  
Activated Carbon Fiber ◽  
Coke Deposition
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