scholarly journals Study on the Modification of Humic Acid and Its Adsorption to Methylene Blue

2018 ◽  
Keyword(s):  
Methylene Blue ◽  
Humic Acid

Lead(II) and methylene blue removal using a fully biodegradable hydrogel based on starch immobilized humic acid

2015 ◽  
Vol 268 ◽  
pp. 348-355 ◽  
Author(s):  
Rongping Chen ◽  
Yinlong Zhang ◽  
Lianfeng Shen ◽  
Xiaoyan Wang ◽  
Jianqiang Chen ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Humic Acid ◽  
Methylene Blue Removal ◽  
Biodegradable Hydrogel

Removal of methylene blue from aqueous solution using humic-acid coated magnetic nanoparticles

2014 ◽  
Vol 55 (2) ◽  
pp. 539-548 ◽  
Author(s):  
Rong Ping Chen ◽  
Yin Long Zhang ◽  
Xiao Yan Wang ◽  
Cheng Yue Zhu ◽  
Ai Jun Ma ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Magnetic Nanoparticles ◽  
Humic Acid

Organocation speciation. II. Methylene blue photosensitization as a model for speciation and toxicity of herbicides

1980 ◽  
Vol 58 (6) ◽  
pp. 555-558 ◽  
Author(s):  
Robert D. Guy ◽  
Deoraj R. Narine
Keyword(s):  
Methylene Blue ◽  
Humic Acid ◽  
Binding Sites ◽  
Chemical Speciation ◽  
Spectrophotometric Study ◽  
Biologically Active ◽  
Acid Complex ◽  
True Solution ◽  
Size Separation ◽  
Tryptophan Degradation

A chemical model that employs the photosensitization properties of methylene blue to mimic herbicide toxicity is used to test size separation as a method of chemical speciation. A spectrophotometric study of the dye interactions with the humic colloid indicated that the dye – humic acid complex has a weaker absorption spectrum than the free dye. The absorption spectra suggested that the binding sites on the humic acid are sufficiently isolated to prevent dye–dye interactions on the colloid surface. The dye photosensitization of tryptophan degradation indicated that only the free methylene blue was active in the presence of humic acid, clay, and polystyrene sulphonic acid. The model suggests that if the pollutant must be in true solution to be biologically active then a size separation by dialysis would be a satisfactory speciation procedure.

Organocation speciation. I. A comparison of the interactions of methylene blue and paraquat with bentonite and humic acid

1980 ◽  
Vol 58 (6) ◽  
pp. 547-554 ◽  
Author(s):  
R. D. Guy ◽  
D. R. Narine ◽  
S. deSilva
Keyword(s):  
Methylene Blue ◽  
Humic Acid ◽  
Ionic Strength ◽  
Alkaline Earth ◽  
Natural Waters ◽  
Exchange Capacity ◽  
Model System ◽  
Spectrophotometric Analysis ◽  
Clay Surface ◽  
Alkaline Earth Cations

A model System composed of bentonite, humic acid (HA), polystyrene sulphonic acid (PSSA), methylene blue (MB), and paraquat was used to characterize the possible interactions of organocations in natural waters. The adsorption and desorption studies with bentonite indicated that the clay had a strong preference for the organocations over alkali and alkaline earth cations. Paraquat saturated the bentonite up to the cation exchange capacity whereas methylene blue did not completely saturate the clay but did form methylene blue aggregates on the clay surface. The aggregates could be readily removed by washing with distilled water. The organocation interactions with the anionic polyelectrolytes were more susceptible to changes in pH or ionic strength. Paraquat could be completely desorbed from HA and PSSA by raising the solution ionic strength to 0.1. Methylene blue could not be completely removed from the humic acid but could be removed from PSSA by raising the ionic strength to 0.1. The studies indicate that a combination of dialysis separations, variation of ionic strength, and spectrophotometric analysis could be used to determine the free paraquat and the bound paraquat susceptible to changes in environmental levels of pH and ionic strength.

Adsorption of methylene blue onto humic acid-coated Fe3O4 nanoparticles

2013 ◽  
Vol 435 ◽  
pp. 85-90 ◽  
Author(s):  
Xian Zhang ◽  
Panyue Zhang ◽  
Zhen Wu ◽  
Ling Zhang ◽  
Guangming Zeng ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Humic Acid ◽  
Fe3o4 Nanoparticles

scholarly journals Humic Acid Based Biopolymeric Membrane for Effective Removal of Methylene Blue and Rhodamine B

2015 ◽  
Vol 54 (18) ◽  
pp. 4965-4975 ◽  
Author(s):  
Seema S. Shenvi ◽  
Arun M. Isloor ◽  
Ahmad F. Ismail ◽  
Simon J. Shilton ◽  
Amir Al Ahmed
Keyword(s):  
Methylene Blue ◽  
Humic Acid ◽  
Rhodamine B ◽  
Effective Removal
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