scholarly journals Competitive adsorption of naphthalene and phenanthrene on walnut shell based activated carbon and the verification via theoretical calculation

RSC Advances ◽  
2020 ◽  
Vol 10 (18) ◽  
pp. 10703-10714 ◽  
Author(s):  
Zhansheng Wu ◽  
Zhonghai Sun ◽  
Pengyun Liu ◽  
Qing Li ◽  
Renpeng Yang ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Theoretical Calculation ◽  
Competitive Adsorption ◽  
Walnut Shell ◽  
Koh Activation ◽  
Microwave Assisted

Walnut shell based activated carbon (WAC) was prepared via microwave-assisted KOH activation.

Microwave-assisted one-step preparation of macadamia nut shell-based activated carbon for efficient adsorption of Reactive Blue

2017 ◽  
Vol 41 (24) ◽  
pp. 15373-15383 ◽  
Author(s):  
Chunfeng Du ◽  
Yongtao Xue ◽  
Zhansheng Wu ◽  
Zhilin Wu
Keyword(s):  
Activated Carbon ◽  
Microwave Radiation ◽  
Koh Activation ◽  
Microwave Assisted ◽  
Macadamia Nut ◽  
One Step

In this work, macadamia nut shell-based activated carbon (MNSAC) was prepared using macadamia nut shells (MNS) through KOH activation under microwave radiation.

Characterization and methanol adsorption of walnut-shell activated carbon prepared by KOH activation

2016 ◽  
Vol 31 (2) ◽  
pp. 260-268 ◽  
Author(s):  
Qiongfen Yu ◽  
Ming Li ◽  
Xu Ji ◽  
Yu Qiu ◽  
Yuntao Zhu ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Walnut Shell ◽  
Koh Activation ◽  
Methanol Adsorption

scholarly journals Optimization of Preparation of Activated Carbon fromRicinus communisLeaves by Microwave-Assisted Zinc Chloride Chemical Activation: Competitive Adsorption of Ni2+Ions from Aqueous Solution

2013 ◽  
Vol 2013 ◽  
pp. 1-12 ◽  
Author(s):  
M. Makeswari ◽  
T. Santhi
Keyword(s):  
Activated Carbon ◽  
Metal Ions ◽  
Zinc Chloride ◽  
Metal Ion ◽  
Competitive Adsorption ◽  
Ricinus Communis ◽  
Chemical Activation ◽  
The Other ◽  
Order Kinetic ◽  
Microwave Assisted

The preparation of activated carbon (AC) fromRicinus communisleaves was investigated in this paper. Orthogonal array experimental design method was used to optimize the preparation of AC using microwave assisted zinc chloride. Optimized parameters were radiation power of 100 W, radiation time of 8 min, concentration of zinc chloride of 30% by volume, and impregnation time of 24 h, respectively. The surface characteristics of the AC prepared under optimized conditions were examined by pHZPC, SEM-EDAX, XRD, and FTIR. Competitive adsorption of Ni2+ions onRicinus communisleaves by microwave assisted zinc chloride chemical activation (ZLRC) present in binary and ternary mixture was compared with the single metal solution. The effects of the presence of one metal ion on the adsorption of the other metal ion were investigated. The experimental results indicated that the uptake capacity of one metal ion was reduced by the presence of the other metal ion. The extent of adsorption capacity of the binary and ternary metal ions tested on ZLRC was low (48–69%) as compared to single metal ions. Comparisons with the biosorption of Ni2+ions by the biomass of ZLRC in the binary (48.98–68.41%-~Ni-Cu and 69.76–66.29%-~Ni-Cr) and ternary solution (67.32–57.07%-~Ni–Cu and Cr) could lead to the conclusion that biosorption of Ni2+ions was reduced by the influence of Cu2+and Cr3+ions. The equilibrium data of the adsorption was well fitted to the Langmuir isotherm. The adsorption process follows the pseudo-second-order kinetic model.

Preparation of High Surface Area Activated Carbon from Spent Phenolic Resin by Microwave Heating and KOH Activation

2018 ◽  
Vol 37 (1) ◽  
pp. 59-68 ◽  
Author(s):  
Song Cheng ◽  
Libo Zhang ◽  
Shengzhou Zhang ◽  
Hongying Xia ◽  
Jinhui Peng
Keyword(s):  
Activated Carbon ◽  
Surface Area ◽  
Microwave Power ◽  
Phenolic Resin ◽  
High Surface ◽  
High Surface Area ◽  
Raw Material ◽  
Bet Surface Area ◽  
Koh Activation ◽  
Microwave Assisted

AbstractThe spent phenolic resin is as raw material for preparing high surface area activated carbon (HSAAC) by microwave-assisted KOH activation. The effects of microwave power, activation duration and impregnation ratio (IR) on the iodine adsorption capability and yield of HSAAC were investigated. The surface characteristics of HSAAC were characterized by nitrogen adsorption isotherms, FTIR, SEM and TEM. The operating variables were optimized utilizing the response surface methodology (RSM) and were identified to be microwave power of 700 W, activation duration of 15 min and IR of 4, corresponding to a yield of 51.25 % and an iodine number of 2,384 mg/g. The pore structure parameters of the HSAAC, i. e., Brunauer–Emmett–Teller (BET) surface area, total pore volume, and average pore diameter were estimated to be 4,269 m2/g, 2.396 ml/g and 2.25 nm, respectively, under optimum conditions. The findings strongly support the feasibility of microwave-assisted KOH activation for preparation of HSAAC from spent phenolic resin.

scholarly journals Parametric Study on Microwave-Assisted Pyrolysis Combined KOH Activation of Oil Palm Male Flowers Derived Nanoporous Carbons

Materials ◽  
2020 ◽  
Vol 13 (12) ◽  
pp. 2876
Author(s):  
Napat Kaewtrakulchai ◽  
Kajornsak Faungnawakij ◽  
Apiluck Eiad-Ua
Keyword(s):  
Microwave Radiation ◽  
Oil Palm ◽  
Radiation Power ◽  
Operating Time ◽  
Bet Surface Area ◽  
Koh Activation ◽  
Nanoporous Carbons ◽  
Microwave Assisted ◽  
Activating Agent ◽  
Male Flowers

Oil palm male flowers (PMFs), an abundant agricultural waste from oil palm plantation in Thailand, have been utilized as an alternative precursor to develop nanoporous carbons (NPCs) via microwave-assisted pyrolysis combined potassium hydroxide (KOH) activation. The influences of relevant processing variables, such as activating agent ratio, microwave power, and activation time on the specific pore characteristics, surface morphology, and surface chemistry of PMFs derived nanoporous carbons (PMFCs) have been investigated to explore the optimum preparation condition. The optimum condition under a microwave radiation power of 700 W, activation holding time of 6 min, and activating agent ratio of 2:1 obtained the PMFC with the highest Brunauer–Emmett–Teller (BET) surface area and total pore volume approximately of 991 m2/g and 0.49 cm3/g, composed of a carbon content of 74.56%. Meanwhile, PMFCs have a highly microporous structure of about 71.12%. Moreover, activating agent ratio and microwave radiation power indicated a significant influence on the surface characteristics of PMFCs. This study revealed the potential of oil palm male flowers for the NPCs’ production via microwave-assisted KOH activation with a short operating-time condition.

Sign in / Sign up

Export Citation Format

Share Document