Photocatalytic decolourization of the X3B textile dye in aqueous solutions using iron-rich montmorilloniteA paper submitted to the Journal of Environmental Engineering and Science.

2009 ◽  
Vol 36 (7) ◽  
pp. 1265-1271
Author(s):  
Zong-ping Wang ◽  
Li-zhi Huang ◽  
Lin Du ◽  
Hua Sheng ◽  
Bo Lv
Keyword(s):  
Aqueous Solutions ◽  
Butyl Alcohol ◽  
Low Ph ◽  
Textile Dye ◽  
Dye Wastewater ◽  
Ph Values ◽  
Tert Butyl Alcohol ◽  
Nano Clay ◽  
Uv Lamp ◽  
Structural Iron

Photocatalytic decolourization of textile dye X3B in aqueous solutions was investigated, using iron-rich montmorillonite (MMt, 2.24%Fe2O3) under a 15 W low-pressure UV lamp (λ = 254 nm, I = 48.4 μW/cm2). Hydroxyl radicals (•OH) were detected by tert-butyl alcohol (TBA) in aqueous MMt suspensions under UV irradiation and were found to be responsible for the degradation of X3B. Free iron ions dissolved in MMt suspensions, structural iron in the MMt solid, and the charged surface of nano clay are responsible for hydroxyl radical (•OH) production. Low pH values are favorable for the decolourization of X3B. The •OH concentration increased with increasing aqueous MMt concentrations in the range of 0 – 2.0 g/L; higher concentrations, for example, 5.0 g/L MMt, inhibited the •OH production. The addition of oxalate was favorable for X3B photodegradation in acid-washed MMt suspensions. This study shows that iron-rich MMt is a potential photocatalyst for the treatment of dye wastewater.

scholarly journals Efficient Degradation of Mordant Blue 9 Using the Fenton-Activated Persulfate System

Water ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 2532 ◽  
Author(s):  
Md. Nahid Pervez ◽  
Felix Y. Telegin ◽  
Yingjie Cai ◽  
Dongsheng Xia ◽  
Tiziano Zarra ◽  
...  
Keyword(s):  
Butyl Alcohol ◽  
Textile Dye ◽  
Oh Radicals ◽  
Operational Parameters ◽  
Reaction Conditions ◽  
Tert Butyl Alcohol ◽  
Initial Ph ◽  
Fe Complex ◽  
Optimal Reaction ◽  
Activated Persulfate

In this study, a Fenton-activated persulfate (Fe2+/PS) system was introduced for the efficient degradation of Mordant Blue 9 (MB 9) as a textile dye in an aqueous solution. Results showed that the degradation of MB 9 was markedly influenced by operational parameters, such as initial pH, PS concentration, Fe2+ concentration, and initial dye concentration. Optimal reaction conditions were then determined. Inorganic anions, such as Cl− and HCO3−, enhanced the degradation efficiency of MB 9 under optimal conditions. Addition of HCO3− reduced the degradation performance of MB 9, whereas the addition of Cl− increased the degradation percentage of MB 9. In addition, quenching experiments were conducted using methanol and tert-butyl alcohol as scavengers, and methanol was identified as an effective scavenger. Thus, the degradation of MB 9 was attributed to S O 4 • − and •OH radicals. The degradation and mineralization efficiency of MB 9 was significantly reduced using the conventional Fenton process i.e., Fe2+/ hydrogen peroxide (HP) because of the formation of a Fe complex during degradation. Meanwhile, the Fe2+/persulfate (PS) system improved the degradation and mineralization performance.

scholarly journals Structural, rheological and dynamic aspects of hydrogen-bonding molecular liquids: Aqueous solutions of hydrotropic tert-butyl alcohol

2020 ◽  
Vol 560 ◽  
pp. 730-742 ◽  
Author(s):  
Jure Cerar ◽  
Andrej Jamnik ◽  
Ildikó Pethes ◽  
László Temleitner ◽  
László Pusztai ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Aqueous Solutions ◽  
Butyl Alcohol ◽  
Molecular Liquids ◽  
Tert Butyl ◽  
Tert Butyl Alcohol

Coefficients B de viscosité dans les systèmes ternaires aqueux. I. NaCl – alcool tert-butylique – eau et Bu4NBr – alcool tert-butylique – eau à 25 °C

1977 ◽  
Vol 55 (9) ◽  
pp. 1521-1526 ◽  
Author(s):  
Marc Palma ◽  
Jean-Pierre Morel
Keyword(s):  
Aqueous Solutions ◽  
Viscosity Coefficient ◽  
Butyl Alcohol ◽  
Thermodynamic Quantities ◽  
Free Enthalpy ◽  
Organic Mixtures ◽  
Tert Butyl ◽  
Enthalpy Of Activation ◽  
Tert Butyl Alcohol

We have measured the viscosity coefficient B of the electrolytes NaCl and Bu4NBr in aqueous-organic mixtures containing up to 40% by weight of tert-butyl alcohol (TBA), as well as that of the non-electrolyte TBA in aqueous solutions of the salts NaCl and Bu4NBr. The variations of B were compared with those of the thermodynamic quantities ΔHtθ and ΔStθ of the solutes studied in these different media. The contribution of the solute to the free enthalpy of activation of viscosity has also been calculated.

Surface properties of diluted aqueous solutions of tert‐butyl alcohol

1995 ◽  
Vol 102 (5) ◽  
pp. 2113-2117 ◽  
Author(s):  
Jacek Gliński ◽  
Guy Chavepeyer ◽  
Jean‐Karl Platten
Keyword(s):  
Aqueous Solutions ◽  
Surface Properties ◽  
Butyl Alcohol ◽  
Tert Butyl ◽  
Tert Butyl Alcohol

Investigation of Cu(II) adsorption from aqueous solutions by NKF-6 zeolite

2011 ◽  
Vol 63 (3) ◽  
pp. 395-402 ◽  
Author(s):  
H. Zhang ◽  
D. Zhao ◽  
L. Chen ◽  
X. J. Yu
Keyword(s):  
Aqueous Solutions ◽  
Outer Sphere ◽  
Low Ph ◽  
Ambient Conditions ◽  
Temperature Dependent ◽  
Ph Values ◽  
Batch Technique ◽  
Negative Effect ◽  
High Level ◽  
Positive Effect

Adsorption of Cu(II) from aqueous solutions using NKF-6 zeolite was investigated by batch technique under ambient conditions. The adsorption was investigated as a function of pH, ionic strength, fulvic acid (FA), foreign ions and temperature. The results indicated that the adsorption of Cu(II) on NKF-6 zeolite gradually increases from 0 to 90% with increasing pH at pH<6.5, and maintains high level at pH>6.5. Outer-sphere complexation or ion exchange may be the main adsorption mechanism of Cu(II) to NKF-6 zeolite at low pH values, whereas the adsorption of Cu(II) at pH>6.5 is mainly dominated by inner-sphere complexation or precipitation. A positive effect of FA on Cu(II) adsorption onto NKF-6 zeolite is observed at low pH values, while a negative effect of FA is observed at high pH values. The thermodynamic parameters (i.e., ΔH0, ΔS0 and ΔG0) for the adsorption of Cu(II) were determined from the temperature dependent isotherms at 20, 40 and 60°C, respectively, and the results indicated that the adsorption reaction is favoured at low temperature. The results suggested that the adsorption process of Cu(II) on NKF-6 zeolite is spontaneous and exothermic.

Ozone Solubility in Phosphate-Buffered Aqueous Solutions:  Effect of Temperature,tert-Butyl Alcohol, and pH

1996 ◽  
Vol 35 (4) ◽  
pp. 1467-1471 ◽  
Author(s):  
Roberto Andreozzi ◽  
Vincenzo Caprio ◽  
Ilio Ermellino ◽  
Amedeo Insola ◽  
Vincenzo Tufano
Keyword(s):  
Aqueous Solutions ◽  
Butyl Alcohol ◽  
Effect Of Temperature ◽  
Tert Butyl ◽  
Tert Butyl Alcohol
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