Surface modification of biomass for the enhancement of adsorptive removal of cationic dye from aqueous solution

2020 ◽  
Vol 33 ◽  
pp. 2086-2091
Author(s):  
Bintu Thomas ◽  
L.K. Alexander
Keyword(s):  
Aqueous Solution ◽  
Surface Modification ◽  
Cationic Dye ◽  
Adsorptive Removal

Adsorptive Removal of Cationic Dye from Aqueous Solution by Graphene Oxide/Cellulose Acetate Composite

2019 ◽  
Vol 19 (8) ◽  
pp. 4535-4542 ◽  
Author(s):  
Haoliang Zang ◽  
Yanhui Li ◽  
Yali Li ◽  
Long Chen ◽  
Qiuju Du ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Graphene Oxide ◽  
Cellulose Acetate ◽  
Cationic Dye ◽  
Adsorptive Removal

Adsorptive removal of ammonium ion from aqueous solution using surfactant-modified alumina

2017 ◽  
Vol 14 (5) ◽  
pp. 327 ◽  
Author(s):  
Tien Duc Pham ◽  
Thi Trang Do ◽  
Van Lau Ha ◽  
Thi Hai Yen Doan ◽  
Thi Anh Huong Nguyen ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Surface Modification ◽  
Surface Charge ◽  
Adsorption Isotherms ◽  
Ammonium Ion ◽  
Agricultural Water ◽  
Ammonium Ions ◽  
Modified Alumina ◽  
Adsorptive Removal ◽  
Α Al2o3

Environmental contextAmmonium ion, an inorganic pollutant in agricultural land, can induce eutrophication, impacting on water quality. We investigate the adsorption of ammonium ion on surfactant-modified alumina and demonstrate highly efficient removal of ammonium ions by the alumina from two agricultural water samples. Adsorption mechanisms are also proposed based on adsorption isotherms, surface modification and the change in surface charge. AbstractThe adsorptive removal of ammonium ions (NH4+) from aqueous solution using surfactant-modified alumina (SMA) was investigated. The optimum NH4+ adsorption removal conditions on SMA were systematically studied and found to be pH 4, contact time 180min, adsorbent dosage 30mgmL–1 and ionic strength 1mM NaCl. The equilibrium concentration of NH4+ was measured by capillary electrophoresis with capacitively coupled contactless conductivity detection (CE-C4D) and spectrophotometry. Surface modification of α-Al2O3 with the anionic surfactant sodium dodecyl sulfate (SDS) at high salt concentration induced a significant increase of removal efficiency. The change in surface charge and surface modification of α-Al2O3 by pre-adsorption of SDS and subsequent adsorption of NH4+ were evaluated by zeta potential measurements and Fourier-transform infrared spectroscopy. Under optimum adsorption conditions, NH4+ removal from two agricultural water samples achieved very high removal efficiencies of 99.5 and 96.5%. The adsorption of NH4+ onto SMA increases with decreasing NaCl concentration because desorption of SDS from the α-Al2O3 surface is minimised. Experimental results of NH4+–SMA adsorption isotherms at different ionic strengths can be represented well by a two-step adsorption model. Based on adsorption isotherms, surface charge effect and surface modification, we suggest that the adsorption mechanism of NH4+ onto SMA was mainly electrostatic attraction between cationic NH4+ and the negatively charged SMA surface.

Application of seaweeds for the removal of cationic dye from aqueous solution

2016 ◽  
Vol 57 (53) ◽  
pp. 25812-25821 ◽  
Author(s):  
J. Jegan ◽  
J. Vijayaraghavan ◽  
T. Bhagavathi Pushpa ◽  
S.J. Sardhar Basha
Keyword(s):  
Aqueous Solution ◽  
Cationic Dye

Citric acid modified waste cigarette filters for adsorptive removal of methylene blue dye from aqueous solution

2021 ◽  
pp. 50655
Author(s):  
Aafia Tehrim ◽  
Min Dai ◽  
Xiange Wu ◽  
Malik Muhammad Umair ◽  
Imran Ali ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Citric Acid ◽  
Blue Dye ◽  
Methylene Blue Dye ◽  
Adsorptive Removal
Sign in / Sign up

Export Citation Format

Share Document