scholarly journals Adsorption of atrazine from aqueous solution using unmodified and modified bentonite clays

2018 ◽  
Vol 8 (7) ◽  
Author(s):  
Oluwaseun Jacob Ajala ◽  
Friday Onyekwere Nwosu ◽  
Rasheed Kayode Ahmed
Keyword(s):  
Aqueous Solution ◽  
Modified Bentonite ◽  
Bentonite Clays

Using of modified-bentonite as low-cost sorbent for removal of methylene blue dye from aqueous solution

2020 ◽  
Vol 27 (2) ◽  
pp. 45-54
Author(s):  
Saraa Muwafaq Ibrahim ◽  
Ziad T. Abd Ali
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Silanol Group ◽  
Infrared Spectrometry ◽  
Blue Dye ◽  
Ammonium Bromide ◽  
Vibration Band ◽  
Order Kinetic ◽  
Methylene Blue Dye ◽  
Modified Bentonite

Batch experiments have been studied to remove methylene blue dye (MB) from aqueous solution using modified bentonite. The modified bentonite was synthesized by replacing exchangeable calcium cations in natural bentonite with cationic surfactant cetyl trimethyl ammonium bromide (CTAB). The characteristics of modified bentonite were studied using different analysis such as Scanning electronic microscopy (SEM), Fourier transform infrared spectrometry (FTIR) and surface area. Where SEM shows the natural bentonite has a porous structure, a rough and uneven appearance with scattered and different block structure sizes, while the modified bentonite surface morphology was smooth and supplemented by a limited number of holes. On other hand, (FTIR) analysis that proved NH group aliphatic and aromatic group of MB and silanol group are responsible for the sorption of contaminate. The organic matter peaks at 2848 and 2930 cm-1 in the spectra of modified bentonite which are sharper than those of the natural bentonite were assigned to the CH2 scissor vibration band and the symmetrical CH3 stretching absorption band, respectively, also the 2930 cm-1 peak is assigned to CH stretching band. The batch study was provided the maximum removal efficiency (99.99 % MB) with a sorption capacity of 129.87 mg/g at specified conditions (100 mg/L, 25℃, pH 11 and 250rpm). The sorption isotherm data fitted well with the Freundlich isotherm model. The kinetic studies were revealed that the sorption follows a pseudo-second-order kinetic model which indicates chemisorption between sorbent and sorbate molecules.

Removal of tetramethyl thiuram disulphide from aqueous solution by chemically modified bentonite

2007 ◽  
Vol 42 (2) ◽  
pp. 105-112 ◽  
Author(s):  
E. González Pradas ◽  
M. Villafranca Sánchez ◽  
A. Valverde Garcia ◽  
M. Socias Viciana ◽  
F. del Rey Bueno ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Modified Bentonite ◽  
Chemically Modified

The efficiency of modified bentonite clays for removal of aromatic organics from oily liquid wastes

1997 ◽  
Vol 4 (3) ◽  
pp. 155-164 ◽  
Author(s):  
Saeid Gitipour ◽  
Mark T. Bowers ◽  
Warren Huff ◽  
Andrew Bodocsi
Keyword(s):  
Modified Bentonite ◽  
Liquid Wastes ◽  
Bentonite Clays ◽  
Oily Liquid

Adsorption of acid dyes from aqueous solution by CTMAB modified bentonite: Kinetic and isotherm modeling

2015 ◽  
Vol 211 ◽  
pp. 1074-1081 ◽  
Author(s):  
Liang-guo Yan ◽  
Li-lu Qin ◽  
Hai-qin Yu ◽  
Shuang Li ◽  
Ran-ran Shan ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Acid Dyes ◽  
Isotherm Modeling ◽  
Modified Bentonite ◽  
Kinetic And Isotherm Modeling

High-potential use of l-Cysh modified bentonite for efficient removal of U(VI) from aqueous solution

2018 ◽  
Vol 316 (1) ◽  
pp. 71-80 ◽  
Author(s):  
Huai Chen ◽  
Quan Shui Chen ◽  
Bin Huang ◽  
Shi Wei Wang ◽  
Ling Yu Wang
Keyword(s):  
Aqueous Solution ◽  
High Potential ◽  
Efficient Removal ◽  
Modified Bentonite ◽  
Potential Use

Adsorptive Removal of Reactive Dyes from Aqueous Solution by Cationic Polyelectrolyte Modified Bentonite

2014 ◽  
Vol 1073-1076 ◽  
pp. 16-20
Author(s):  
Run Fang ◽  
Wei Jian Chen
Keyword(s):  
Aqueous Solution ◽  
Physical Adsorption ◽  
Reactive Dyes ◽  
Cationic Polyelectrolyte ◽  
Modified Bentonite ◽  
Adsorption Data ◽  
Ph Range ◽  
Increasing Temperature ◽  
Potential Test ◽  
Optimum Ph Range

This study reports on the modification of natural bentonite by a cationic polyelectrolyte, which is a lignin-based aldehyde-ketone resin, and the application of this modified clay as adsorbent in the removal of reactive dyes from aqueous solution. Modified bentonite was characterized by IR and zeta-potential test, its dye removal performance was evaluated. Results show that intermolecular interaction and electrostatic attraction between dyes and adsorbent are responsible for the adsorption behavior. The removal of reactive dyes increased with increasing temperature and the optimum pH range was 4.0-6.5. The negative values of ΔG reflected the spontaneous adsorption and the values of ΔH showed that it was a combination of chemical and physical adsorption. Equilibrium adsorption data fitted well to Langmuir isotherm and the adsorption capacity for reactive red and reactive blue was 125.0 and 159.2 mg/g, respectively.

Polyaniline (PANI) modified bentonite by plasma technique for U(VI) removal from aqueous solution

2017 ◽  
Vol 411 ◽  
pp. 331-337 ◽  
Author(s):  
Xinghao Liu ◽  
Cheng Cheng ◽  
Chengjian Xiao ◽  
Dadong Shao ◽  
Zimu Xu ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Modified Bentonite ◽  
Plasma Technique
Sign in / Sign up

Export Citation Format

Share Document