scholarly journals Removal of Toluidine Blue and Safranin O from Single and Binary Solutions Using Zeolite

Crystals ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1181
Author(s):  
Yan Shi ◽  
Xisen Wang ◽  
Xin Wang ◽  
Kristen Carlson ◽  
Zhaohui Li

The studies on dye removal from solutions attracted great attention due to the increased use of color dyes in different fields. However, most of the studies were focused on dye removal from a single solution. In reality, wastewater from the fabric industry could contain mixed dyes. As such, evaluating different dye removal from mixed solutions may have more practical importance. In terms of sorbents evaluated for dye removal, most of them were an organic type generated from agricultural wastes. Clay minerals and zeolites were also studied extensively, because of the vast reserves, inexpensive material cost, larger specific surface area (SSA) and high cation exchange capacity (CEC). However, evaluating the factors controlling the dye removal from mixed dye solutions was limited. In this study, the removal of cationic dyes safranin O (SO) and toluidine blue (TB) by clinoptilolite zeolite (ZEO) was evaluated under single and binary systems. The results showed that removal of TB was preferred over SO by approximately a 2:1 ratio. The counterion Cl− sorption from mixed dye solution helped the formation of mixed dye aggregates on mineral surfaces. Molecular dynamic simulation confirmed the multilayer mixed dye formation on ZEO under high loading levels.

Author(s):  
Siew Teng Ong ◽  
Chnoong Kheng Lee ◽  
Zulkarnain Zainal ◽  
Pei Sin Keng ◽  
Sie Tiong Ha

In order to avoid the separation process of fine titanium dioxide (TiO2) photocatalyst at the end of the treatment, a simple and effective method was explored to immobilize TiO2 nanoparticles on a support material. In this paper, the effectiveness of using immobilized TiO2 supported on glass plates to remove Basic Blue 3 (BB3) and Reactive Orange (RO16) from single and binary dye solutions was investigated. The photocatalytic degradation of both dyes was investigated under the illumination of either UV or sunlight. The percentage of dye removal increased with increasing irradiation time and the maximum number of dip coatings that can be applied was ten. For all the dye solutions studied, the percentage of dye removal decreased with increasing number of usage of immobilized TiO2. Due to the ease of usage and good photocatalytic efficiency, the findings showed the potential application in decolouring organic dyes for pollution prevention.


Cellulose ◽  
2018 ◽  
Vol 25 (4) ◽  
pp. 2559-2575 ◽  
Author(s):  
Yuanfeng Pan ◽  
Xiang Shi ◽  
Pingxiong Cai ◽  
Tianxiang Guo ◽  
Zhangfa Tong ◽  
...  

2017 ◽  
Vol 313 ◽  
pp. 826-835 ◽  
Author(s):  
Afshin Maleki ◽  
Unes Hamesadeghi ◽  
Hiua Daraei ◽  
Bagher Hayati ◽  
Farhood Najafi ◽  
...  

2019 ◽  
Vol 286 ◽  
pp. 121366 ◽  
Author(s):  
Yuanfeng Pan ◽  
Hualei Xie ◽  
Haiyan Liu ◽  
Pingxiong Cai ◽  
Huining Xiao

2019 ◽  
Vol 377 ◽  
pp. 88-97 ◽  
Author(s):  
Yuan Li ◽  
Huining Xiao ◽  
Yuanfeng Pan ◽  
Min Zhang ◽  
Yongcan Jin

Author(s):  
Arash Almasian ◽  
Mazeyar Parvinzadeh Gashti ◽  
Mohammad Ebrahim Olya ◽  
Ghazaleh Chizari Fard

Polymers ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 208
Author(s):  
Ramona B. J. Ihlenburg ◽  
Anne-Catherine Lehnen ◽  
Joachim Koetz ◽  
Andreas Taubert

New cryogels for selective dye removal from aqueous solution were prepared by free radical polymerization from the highly water-soluble crosslinker N,N,N’,N’-tetramethyl-N,N’-bis(2-ethylmethacrylate)-propyl-1,3-diammonium dibromide and the sulfobetaine monomer 2-(N-3-sulfopropyl-N,N-dimethyl ammonium)ethyl methacrylate. The resulting white and opaque cryogels have micrometer sized pores with a smaller substructure. They adsorb methyl orange (MO) but not methylene blue (MB) from aqueous solution. Mixtures of MO and MB can be separated through selective adsorption of the MO to the cryogels while the MB remains in solution. The resulting cryogels are thus candidates for the removal of hazardous organic substances, as exemplified by MO and MB, from water. Clearly, it is possible that the cryogels are also potentially interesting for removal of other compounds such as pharmaceuticals or pesticides, but this must be investigated further.


Silicon ◽  
2018 ◽  
Vol 11 (4) ◽  
pp. 1817-1827 ◽  
Author(s):  
Seyedeh Mahsa Seyed Danesh ◽  
Hossein Faghihian ◽  
Shahab Shariati
Keyword(s):  

2021 ◽  
Vol 193 ◽  
pp. 110594
Author(s):  
Hanbo Chen ◽  
Peng Qin ◽  
Xing Yang ◽  
Amit Bhatnagar ◽  
Sabry M. Shaheen ◽  
...  

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