Adsorption of several acid dyes from aqueous solution using activated carbon derived from teak sawdust: effect of surface acidity

2018 ◽  
Vol 6 (1) ◽  
pp. 530
Author(s):  
Suryadi Ismadji
Keyword(s):  
Aqueous Solution ◽  
Activated Carbon ◽  
Pore Size ◽  
Surface Acidity ◽  
Dye Adsorption ◽  
Langmuir Equation ◽  
Acid Dyes ◽  
Modified Activated Carbon ◽  
Adsorption Data ◽  
Acid Blue

The adsorption of acid blue 9, acid blue 74 and acid orange 51 from aqueous solution using activated carbon derived from teak sawdust was studied in terms of dye molecular size, pore size and surface acidity of activated carbon. The experimental adsorption data were correlated with Langmuir equation. It was found that Langmuir equation could describe the adsorption data well with R2 higher than 0.95. The surface acidity of activated carbon plays a key role in dye adsorption on modified activated carbon. The interaction between the oxygen-free Lewis basic sites and the free electrons of the dye molecule were the main adsorption mechanism in the adsorption process on modified activated carbon. The adsorption capacities of activated carbon on the adsorption of acid dyes decreased in the order unmodified > modified at 100 oC > modified at 150 oC.Keywords: Activated Carbon, Adsorption, Pore Size, Surface Acidity AbstrakAdsorpsi zat warna acid blue 9, acid blue 74, dan orange 51 dari larutan dengan menggunakan karbon aktif yang terbuat dari serbuk gergaji kayu jati dipelajari sebagai fungsi ukuran molekul zat warna, ukuran pori, dan sifat asampermukaan karbon aktif. Data percobaan adsorpsi kemudian dikorelasikan dengan menggunakan persamaan Langmuir. Dari hasil percobaan yang diperoleh dapat dilihat bahwa persamaan Langmuir dapat menggambarkan data adsorpsi isotermal dengan baik dengan R<sup>o</sup> lebih besar dari 0,95. Sifat asam permukaan memegang peranan yang sangat penting pada proses adsorpsi zat warna pada proses adsorpsi zat warna pada karbon aktif yang telah dimodifikasi. Interaksi antara bagian oxygen-free Lewis yang bersifat basa dan elektron-elektron bebas dari molekul zat warna merupakan mekanisme adsorpsi utama pada proses adsorpsi dengan menggunakan karbon aktif yang telah dimodifikasi. Kemampuan adsorpsi karbon aktif terhadap zat warna yang bersifat asam menurun dengan tingkatan karbon aktif tidak dimodifikasi > modifikasi 100 <sup>o</sup>C > modifikasi pada 100 <sup>o</sup>C > modifikasi pada 150 <sup>o</sup>C.Kata kunci: Adsorpsi, karbon aktif, sifat asam permukaan, ukuran pori

scholarly journals Adsorption of Acid Dyes from Aqueous Solution on a Chitosan-cotton Composite Material Prepared by a New Pad-dry Process

2011 ◽  
Vol 6 (3) ◽  
pp. 155892501100600 ◽  
Author(s):  
Mahjoub Jabli ◽  
Mohamed Hassen V. Baouab ◽  
Mohamed Sadok Roudesli ◽  
Aghleb Bartegi
Keyword(s):  
Aqueous Solution ◽  
Indigo Carmine ◽  
Langmuir Equation ◽  
Acid Dyes ◽  
Chain Molecules ◽  
Dry Process ◽  
Dipole Interactions ◽  
Cure Time ◽  
Recovery Angle ◽  
Acid Blue

In this paper, we developed a method that may be considered as an easy and economical way to prepare chitosan-cotton composite (CH-cotton) materials using an electrolytes-free pad-dry process in which the cure step was performed in an oven microwave to provide a cotton fabric with greatly enhanced affinity for acid dyes. Evidence of successful interaction between cotton and CH through formation of hydrogen bonding and/or ion dipole interactions was analysed by FTIR spectroscopy. Influence of cure time onto the weight per surface unit of samples has been studied and five CH-cotton composite materials with different %CH content (I-V) were prepared. Crosslinking of cellulosic chain molecules of cotton fiber through CH segments was confirmed by Wrinkle Recovery Angle (WRA) and Tensile properties measurements. CH-cotton samples were then tested as adsorbent of four acid dyes from no-electrolytes aqueous solution [Indigo Carmine (AB74), Acid Red 183 (AR183), Acid Blue 161 (AB161) and Acid Yellow 17 (AY17)]. Results were monitored using, reflectance spectro-colorimeter and spectrophotometer analyses. Data obtained with treated cotton showed better dye exhaustion than obtained with untreated one. The modelling of the adsorption isotherms was performed by Langmuir equation and the thermodynamic parameters were evaluated. Globally, the lack of affinity of cotton for acid dyes is widely overcome by the use of low %CH content ranging from 0.079 to 0.515

Removal of metallic trace elements (Pb2+, Cd2+, Cu2+, and Ni2+) from aqueous solution by adsorption onto cerium oxide modified activated carbon

2021 ◽  
Vol 193 (8) ◽  
Author(s):  
Daouda Kouotou ◽  
Mohammed Ghalit ◽  
Julius Nsami Ndi ◽  
Luisa M. Pastrana Martinez ◽  
Meriam El Ouahabi ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Trace Elements ◽  
Activated Carbon ◽  
Cerium Oxide ◽  
Modified Activated Carbon ◽  
Metallic Trace Elements

scholarly journals Removal of Ni (II) from Aqueous Solution by Adsorption onto Activated Carbon Prepared from Lapsi (Choerospondias axillaris) Seed Stone

2014 ◽  
Vol 9 (1) ◽  
pp. 166-174 ◽  
Author(s):  
Rajeshwar M. Shrestha ◽  
Margit Varga ◽  
Imre Varga ◽  
Amar P. Yadav ◽  
Bhadra P. Pokharel ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Activated Carbon ◽  
Activated Carbons ◽  
Low Cost ◽  
Chemical Characterization ◽  
Maximum Adsorption Capacity ◽  
Adsorption Data ◽  
Optimum Ph ◽  
Nickel Adsorption

Activated carbons were prepared from Lapsi seed stone by the treatment with H2SO4 and HNO3 for the removal of Ni (II) ions from aqueous solution. Two activated carbon have been prepared from Lapsi seed stones by treating with conc.H2SO4 and a mixture of H2SO4 and HNO3 in the ratio of 1:1 by weight for removal of Ni(II) ions. Chemical characterization of the resultant activated carbons was studied by Fourier Transform Infrared Spectroscopy and Boehm titration which revealed the presence of oxygen containing surface functional groups like carboxyl, lactones and phenols in the carbons. The optimum pH for nickel adsorption is found to be 5. The adsorption data were better fitted with the Langmuir equations than Freundlich adsorption equation to describe the equilibrium isotherms. The maximum adsorption capacity of Ni (II) on the resultant activated carbons was 28.25.8 mg g-1 with H2SO4 and 69.49 mg g-1 with a mixture of H2SO4 and HNO3. The waste material used in the preparation of the activated carbons is inexpensive and readily available. Hence the carbons prepared from Lapsi seed stones can act as potential low cost adsorbents for the removal of Ni (II) from water. DOI: http://dx.doi.org/10.3126/jie.v9i1.10680Journal of the Institute of Engineering, Vol. 9, No. 1, pp. 166–174

scholarly journals Ricinus CommunisPericarp Activated Carbon Used as an Adsorbent for the Removal of Ni(II) From Aqueous Solution

2008 ◽  
Vol 5 (4) ◽  
pp. 761-769 ◽  
Author(s):  
S. Madhavakrishnan ◽  
K. Manickavasagam ◽  
K. Rasappan ◽  
P. S. Syed Shabudeen ◽  
R. Venkatesh ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Particle Size ◽  
Activated Carbon ◽  
Contact Time ◽  
Metal Ion ◽  
Ricinus Communis ◽  
Ion Concentration ◽  
Batch Mode ◽  
Adsorption Data ◽  
Initial Ph

Activated carbon prepared from Ricinus communis Pericarp was used to remove Ni(II) from aqueous solution by adsorption. Batch mode adsorption experiments are carried out by varying contact time, metal-ion concentration, carbon concentration and pH to assess kinetic and equilibrium parameters. The adsorption data were modeled by using both Langmuir and Freundlich classical adsorption isotherms. The adsorption capacity (Qo) calculated from the Langmuir isotherm was 31.15 mg/g of activated carbon at initial pH of 5.0±0.2 for the particle size 125-250 µm.

Preparation of MgCl2-Coated Activated Carbon and its Adsorption Behavior of Azo Dye from Aqueous Solution

2009 ◽  
Vol 79-82 ◽  
pp. 295-298
Author(s):  
Jin Xiang Sun ◽  
Hai Zeng Wang ◽  
Bao Wei Sun
Keyword(s):  
Aqueous Solution ◽  
Activated Carbon ◽  
Specific Surface ◽  
Pore Size ◽  
Azo Dye ◽  
Removal Rate ◽  
Weak Acid ◽  
Adsorption Behavior ◽  
Optimum Conditions ◽  
Mgcl2 Solution

The preparation of MgCl2/AC composite and its adsorption behavior of azo dye from aqueous solution were investigated. The pore size of the new kinds of adsorbent increased with increasing the dosage of MgCl2 solution, while specific surface area decreased. The removal rate of Weak Acid Red 2R from aqueous solution on the MgCl2/AC composite was 93.4 % at the optimum conditions of the preparation: activated carbon with 2 M MgCl2 solution at 110°C for 2 h.

scholarly journals Broadening the pore size of coal-based activated carbonviaa washing-free chem-physical activation method for high-capacity dye adsorption

RSC Advances ◽  
2018 ◽  
Vol 8 (26) ◽  
pp. 14488-14499 ◽  
Author(s):  
Longxin Li ◽  
Fei Sun ◽  
Jihui Gao ◽  
Lijie Wang ◽  
Xinxin Pi ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Pore Size Distribution ◽  
Pore Size ◽  
High Capacity ◽  
Dye Adsorption ◽  
High Rate ◽  
Physical Activation ◽  
Size Distributions ◽  
Pore Size Distributions ◽  
New Type

Aiming to overcome the limitations of the narrow pore size distributions of traditional activated carbon, we demonstrate a new type of activated carbon with a broadened pore size distribution for high-rate and high-capacity aqueous dye adsorption.

Attachment and Growth of Biomass on Surface-Modified Activated Carbon Fibers

1992 ◽  
Vol 26 (3-4) ◽  
pp. 665-671 ◽  
Author(s):  
K. Kutics ◽  
M. Suzuki
Keyword(s):  
Activated Carbon ◽  
Activated Carbons ◽  
Surface Acidity ◽  
Calculated Data ◽  
Bacterial Biomass ◽  
Activated Carbon Fiber ◽  
Continuous Stirred Tank Reactor ◽  
Modified Activated Carbon ◽  
Start Up ◽  
Surface Modified

Activated carbon fiber (ACF) was used as a model of commercial activated carbons to examine the effect of surface chemistry on the attachment behavior of bacterial biomass. Surface acidity was found to enhance the biomass-ACF interaction. When ACFs were applied as biomass support media in a continuous stirred tank reactor, surface acidity of the carbon resulted in faster biomass growth in the start-up phase. The start-up phase was simulated by a simple biomass attachment kinetics model. Experimental and calculated data show a reasonable agreement, with the exception of the hydrogenated specimen, which was interpreted by assuming that the hydrogen-reduced surface is highly reactive and then may undergo oxidation in the initial phase of operation so that the adsorption characteristics are altered.

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