scholarly journals The preparation of organophosphorus ligand-modified SBA-15 for effective adsorption of Congo red and Reactive red 2

RSC Advances ◽  
2019 ◽  
Vol 9 (24) ◽  
pp. 13476-13485 ◽  
Author(s):  
Fan Zhang ◽  
Chuting Yang ◽  
Yi Li ◽  
Min Chen ◽  
Sheng Hu ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Azo Dyes ◽  
Congo Red ◽  
Organophosphorus Ligand ◽  
Post Synthesis ◽  
Reactive Red 2

P,P-bis (2-oxooxazolidin-3-yl)-N-(3-(triethoxysilyl)propyl)phosphinic amide (APTES-BOP)-modified SBA-15 (SBA-15-BOP) was prepared by a post-synthesis grafting method for the removal of anionic azo dyes from aqueous solutions.

High impact of thiol capped ZnS nanocrystals on the degradation of single and binary aqueous solutions of industrial azo dyes under sunlight

2021 ◽  
pp. 105915
Author(s):  
Sabri Ouni ◽  
Naim Bel Haj Mohamed ◽  
Mohamed Bouzidi ◽  
Adrian Bonilla-Petriciolet ◽  
Mohamed Haouari
Keyword(s):  
Aqueous Solutions ◽  
Azo Dyes ◽  
High Impact ◽  
Zns Nanocrystals

Effects of hydrating water molecules on the aggregation behavior of azo dyes in aqueous solutions

1991 ◽  
Vol 16 (2) ◽  
pp. 111-118 ◽  
Author(s):  
Kunihiro Hamada ◽  
Haruhiko Nonogaki ◽  
Yoshihiro Fukushima ◽  
Baljir Munkhbat ◽  
Masaru Mitsuishi
Keyword(s):  
Aqueous Solutions ◽  
Azo Dyes ◽  
Aggregation Behavior ◽  
Water Molecules

Removal of Congo Red from Aqueous Solutions by Spent Black Tea as Adsorbent

2018 ◽  
Vol 40 (4) ◽  
pp. 206-212 ◽  
Author(s):  
Rabia Jalil Khan ◽  
Ahmad Nauman Shah Saqib ◽  
Robina Farooq ◽  
Romana Khan ◽  
Maria Siddique
Keyword(s):  
Aqueous Solutions ◽  
Congo Red ◽  
Black Tea

scholarly journals Congo Red Decolorization and Detoxification by Aspergillus niger: Removal Mechanisms and Dye Degradation Pathway

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Nedra Asses ◽  
Lamia Ayed ◽  
Neila Hkiri ◽  
Moktar Hamdi
Keyword(s):  
Molecular Structure ◽  
Aspergillus Niger ◽  
Azo Dyes ◽  
Lignin Peroxidase ◽  
Congo Red ◽  
Manganese Peroxidase ◽  
Dye Degradation ◽  
Degradation Pathway ◽  
Effects Of Ph ◽  
Maximum Decolorization

Congo red is one of the best known and used azo dyes which has two azo bonds (-N=N-) chromophore in its molecular structure. Its structural stability makes it highly toxic and resistant to biodegradation. The objective of this study was to assess the congo red biodegradation and detoxification by Aspergillus niger. The effects of pH, initial dye concentration, temperature, and shaking speed on the decolorization rate and enzymes production were studied. The maximum decolorization was correlated with lignin peroxidase and manganese peroxidase production. Above 97% were obtained when 2 g mycelia were incubated at pH 5, in presence of 200 mg/L of dye during 6 days at 28°C and under 120 to 150 rpm shaking speed. The degraded metabolites were characterized by using LC-MS/MS analyses and the biodegradation mechanism was also studied. Congo red bioconversion formed degradation metabolites mainly by peroxidases activities, i.e., the sodium naphthalene sulfonate (m/z = 227) and the cycloheptadienylium (m/z = 91). Phytotoxicity and microtoxicity tests confirmed that degradation metabolites were less toxic than original dye.

scholarly journals Catalytic degradation of real-textile azo-dyes in aqueous solutions by using Cu–Co/halloysite

2019 ◽  
Vol 42 (4) ◽  
Author(s):  
Juan A Torres-Luna ◽  
Gloria I Giraldo-Gómez ◽  
Nancy R Sanabria-González ◽  
José G Carriazo
Keyword(s):  
Aqueous Solutions ◽  
Azo Dyes ◽  
Catalytic Degradation

scholarly journals Enhanced Adsorption of Methylene Blue and Congo Red from Aqueous Solutions by MCM-41/HKUST-1 Composites

2019 ◽  
Vol 31 (8) ◽  
pp. 1675-1682 ◽  
Author(s):  
D.O. Sulistiono ◽  
E. Santoso ◽  
R. Ediati
Keyword(s):  
Methylene Blue ◽  
Mesoporous Silica ◽  
Aqueous Solutions ◽  
Congo Red ◽  
Metal Organic Framework ◽  
Solvent Mixture ◽  
Sem Images ◽  
Enhanced Adsorption ◽  
Xrd Patterns ◽  
Mcm 41

Impregnation of mesoporous silica MCM-41 on metal organic framework type HKUST-1 or often called CuBTC (BTC = 1,3,5-benzenetricarboxylate) has been successfully carried out by solvothermal methods in a solvent mixture of water, ethanol and N,N-dimethylformamide (DMF). The XRD patterns of the obtained solids showed that MCM-41/HKUST-1 composites had the same crystalline phase as pure as HKUST-1. SEM images revealed that the impregnation of the mesoporous silica to HKUST-1 did not alter the surface morphology of the original HKUST-1, which had octahedral shapes. In addition, the thermal stability of the MCM-41/HKUST-1 composites reached 302 °C, increased by 292 °C in comparison to the HKUST-1, even though the impregnation process resulted in a decreased in the specific surface area of the composites. Furthermore, MCM-41/HKUST-1 composites showed outstanding performance as adsorbent of methylene blue and Congo red in aqueous solutions. Results of adsorption studies showed that a pseudo-second order kinetics and Langmuir isotherm were observed for both types of dyes.

The radiation-induced degradation of azo dyes in aqueous solutions

1975 ◽  
Vol 26 (12) ◽  
pp. 726-730 ◽  
Author(s):  
Nobutake Suzuki ◽  
Takeshi Nagai ◽  
Hiroshi Hotta ◽  
Masamitsu Washino
Keyword(s):  
Aqueous Solutions ◽  
Azo Dyes ◽  
Radiation Induced
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