scholarly journals Revealing the role of the 1T phase on the adsorption of organic dyes on MoS2 nanosheets

RSC Advances ◽  
2019 ◽  
Vol 9 (49) ◽  
pp. 28345-28356 ◽  
Author(s):  
Asmaa M. Omar ◽  
Ossama I. Metwalli ◽  
Mohamed R. Saber ◽  
Gomaa Khabiri ◽  
Mohamed E. M. Ali ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
Active Sites ◽  
Organic Dyes ◽  
Carboxyl Groups ◽  
Mos2 Nanosheets ◽  
High Adsorption ◽  
Strong Binding ◽  
High Adsorption Capacity

The high adsorption capacity of dyes onto the 1T-rich MoS2 samples is due to the strong binding between the hydroxide/carboxyl groups and the 1T active sites. The capacity can be tuned by controlling the ratio between 1T and 2H phases of MoS2 nanosheets.

scholarly journals Ce-doped UiO-67 nanocrystals with improved adsorption property for removal of organic dyes

RSC Advances ◽  
2019 ◽  
Vol 9 (47) ◽  
pp. 27674-27683 ◽  
Author(s):  
Xue Dong ◽  
Yongcen Lin ◽  
Yuqin Ma ◽  
Lang Zhao
Keyword(s):  
Adsorption Capacity ◽  
Hydrothermal Method ◽  
Negative Charge ◽  
Organic Dyes ◽  
Adsorption Property ◽  
Cationic Dyes ◽  
High Adsorption ◽  
One Step ◽  
High Adsorption Capacity

The Ce-doped UiO-67 nanocrystals were successfully synthesized via a one-step hydrothermal method. Ce doping increases the negative charge on the surface of the material, thus the adsorbent exhibits high adsorption capacity to cationic dyes.

scholarly journals Super-Adsorbent Hydrogels for Removal of Methylene Blue from Aqueous Solution: Dye Adsorption Isotherms, Kinetics, and Thermodynamic Properties

Macromol ◽  
2021 ◽  
Vol 1 (4) ◽  
pp. 256-275
Author(s):  
Buddhabhushan Salunkhe ◽  
Thomas P. Schuman
Keyword(s):  
Methylene Blue ◽  
Adsorption Capacity ◽  
Organic Dyes ◽  
Polymer Network ◽  
Dye Adsorption ◽  
Isotherm Models ◽  
High Adsorption ◽  
High Adsorption Capacity ◽  
Efficient Option ◽  
Sodium Styrenesulfonate

Removal of dyes through adsorption from wastewater has gained substantial interest in recent years, especially in development of hydrogel based adsorbents, owing to their easy use and economical nature. The aim of the present study was to design a super-adsorbent hydrogel based on sodium styrenesulfonate (NaSS) monomer for removal of dyes like methylene blue (MB). NaSS displays both an aromatic ring and strongly ionic group in its monomer structure that can enhance adsorption capacity. Poly(sodium styrenesulfonate-co-dimethylacrylamide) hydrogels were prepared by solution free radical polymerization using gelatin methacryloyl (GelMA) as crosslinker, creating a highly porous, three-dimensionally crosslinked polymer network contributing to higher swelling ratios of up to 27,500%. These super-adsorbent hydrogels exhibited high adsorption capacity of 1270 mg/g for MB adsorption with above 98% removal efficiency. This is the first report for such a high adsorption capacity for dye absorbance for NaSS-based hydrogels. Additionally, the adsorption kinetics using a pseudo-first-order and the Freundlich adsorption isotherm models for multilayer, heterogeneous adsorption processes has been reported. The adsorbents’ reusability was confirmed through 4 repeated cycles of desorption-adsorption. The results discussed herein illustrate that NaSS based chemistries can be used as an efficient option for removal of organic dyes from contaminated wastewater.

CNTs synthesized with polyoxometalate-based metal–organic compounds as catalyst precursors via the CVD method and their adsorption performance towards organic dyes

2020 ◽  
Vol 44 (14) ◽  
pp. 5508-5512 ◽  
Author(s):  
Yuan Tian ◽  
Xiu-Li Wang ◽  
Jian Luan ◽  
Hong-Yan Lin ◽  
Zhi-Han Chang ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
Organic Compounds ◽  
Organic Dyes ◽  
High Adsorption ◽  
Adsorption Performance ◽  
Cvd Method ◽  
Metal Organic ◽  
High Adsorption Capacity

CNTs were synthesized with POM-based compounds as catalyst precursors via the CVD method, and they possess a high adsorption capacity towards organic dyes.

Microwave-assisted facile synthesis of TEMPO-oxidized cellulose beads with high adsorption capacity for organic dyes

Cellulose ◽  
2017 ◽  
Vol 24 (11) ◽  
pp. 5025-5040 ◽  
Author(s):  
Fengcai Lin ◽  
Yuzhe You ◽  
Xuan Yang ◽  
Xin Jiang ◽  
Qilin Lu ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
Organic Dyes ◽  
Oxidized Cellulose ◽  
High Adsorption ◽  
Facile Synthesis ◽  
Microwave Assisted ◽  
High Adsorption Capacity

Mercury Removal from Wastewater by Steamed Hoof Powder

1999 ◽  
Vol 40 (7) ◽  
pp. 109-116 ◽  
Author(s):  
M. H. Ansari ◽  
A. M. Deshkar ◽  
P. S. Kelkar ◽  
D. M. Dharmadhikari ◽  
M. Z. Hasan ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Adsorption Capacity ◽  
Adsorption Process ◽  
Adsorption Equilibrium ◽  
Light Metal ◽  
Mercury Removal ◽  
High Adsorption ◽  
Surface Sites ◽  
Ph Values ◽  
High Adsorption Capacity

Steamed Hoof Powder (SHP), size < 53μ, was observed to have high adsorption capacity for Hg(II) with >95% removal from a solution containing 100 mg/L of Hg(II) with only 0.1% (W/V) concentration of SHP. The SHP has good settling properties and gives clear and odour free effluent. Studies indicate that pH values between 2 and 10 have no effect on the adsorption of Hg(II) on SHP. Light metal ions like Na+, K+, Ca2+ and Mg2+ up to concentrations of 500 mg/L and heavy metals like Cu2+, Zn2+, Cd2+, Co2+, Pb2+, Ni2+, Mn2+, Cr3+, Cr6+, Fe2+ and Fe3+ up to concentrations of 100 mg/L do not interfere with the adsorption process. Anions like sulphate, acetate and phosphate up to concentrations of 200 mg/L do not interfere. Chloride interferes in the adsorption process when Hg(II) concentration is above 9.7 mg/L. The adsorption equilibrium was established within two hours. Studies indicate that adsorption occurs on the surface sites of the adsorbent.

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