Studies on Colour Removal from Dye Aqueous Solution Using Modified Forms of Adsorbent Materials

2021 ◽  
pp. 92-102
Author(s):  
A. Geetha
Keyword(s):  
Aqueous Solution ◽  
Colour Removal ◽  
Modified Forms ◽  
Adsorbent Materials

scholarly journals An Investigation into the Adsorption of Aniline from Aqueous Solution Using H-Beta Zeolites and Copper-Exchanged Beta Zeolites

2005 ◽  
Vol 23 (3) ◽  
pp. 255-266 ◽  
Author(s):  
J. O'Brien ◽  
T. Curtin ◽  
T.F. O'Dwyer
Keyword(s):  
Aqueous Solution ◽  
Adsorption Process ◽  
Zeolite Beta ◽  
Langmuir Model ◽  
Beta Zeolite ◽  
Copper Leaching ◽  
Beta Zeolites ◽  
The Stability ◽  
Ph Range ◽  
Adsorbent Materials

Zeolite beta, a large-pore zeolite, was investigated in this study with a view to examining it as a potential adsorbent for the removal of aniline from aqueous solutions. Two different metal-loaded zeolites were prepared by exchanging H-beta zeolite (SiO2/Al2O3 = 75:1) with copper. The influence of exchanged copper on the uptake level was assessed. The effect of varying the silica-to-alumina ratio of the H-beta zeolite on the aniline uptake level was also examined, using three different H-beta zeolites with ratios of 25:1, 75:1 and 150:1 as adsorbents. The sorption experiments indicated an uptake level of ca. 110–120 mg/g for each zeolite and this level was also adsorbed by the copper-modified H-beta zeolites (SiO2/Al2O3 = 75:1). In all cases, the adsorption process followed the Langmuir model for adsorption and the level of aniline adsorbed was largely unaffected by a change in temperature or the presence of extra framework copper. The stability of the exchanged copper on these zeolites was then examined by measuring the quantity of copper leached from each zeolite into solution as a function of pH. Minimum copper leaching was observed in the pH range 5–11. This provided a stable pH working range for the adsorbent materials.

Adsorption of Pb (II) from Aqueous Solution Using some Agricultural Waste as Low Cost Adsorbent Materials: Part 1

2017 ◽  
Vol 29 (1) ◽  
Author(s):  
W Mekhamer ◽  
Naser Alandis ◽  
O Aldayel ◽  
J Hefne ◽  
H Jokhab ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Low Cost ◽  
Agricultural Waste ◽  
Adsorbent Materials

scholarly journals Study of Potential of Marine Macroalgae Biochar for Acid Dyes Removal

2021 ◽  
Vol 37 (6) ◽  
pp. 1415-1420
Author(s):  
Karishma D Shah ◽  
Nayana H. Brahmbhatt ◽  
Pooja N. Thaker
Keyword(s):  
Aqueous Solution ◽  
Waste Disposal ◽  
Elimination Rate ◽  
Dye Adsorption ◽  
Marine Macroalgae ◽  
Acid Dye ◽  
Solid Waste Disposal ◽  
Acid Dyes ◽  
Colour Removal ◽  
Dyes Removal

The goal of this investigation was to check the feasibility of Ulva lactuca carbon could be used to adsorb acid yellow 19 dyes from an aqueous solution. A series of studies were carried out to determine the best conditions for acid dye adsorption. 90 percent colour removal was achieved when pH 3, 1 gm dose, 100 mg/L dye concentration were used for dye adsorption. During the analysis, it was discovered that as the carbon dose was raised, the dye elimination rate rose. The main objective of this study is to reduce solid waste disposal while also addressing the issue of seaweed and developing an effective plan

scholarly journals Synthesis, Characterization and Application of Nano-adsorbent Materials in the Sorption of Pb(II), Ni(II), Co(II), Mn(II), Li(I) from Aqueous Solution

2014 ◽  
Vol 10 (8) ◽  
pp. 3053-3067 ◽  
Author(s):  
Hamdi Mohamed Hassan Gad ◽  
Sh. Labib ◽  
M. I. Aly
Keyword(s):  
Heavy Metals ◽  
Aqueous Solution ◽  
Activated Carbon ◽  
Sorption Process ◽  
Zinc Silicate ◽  
Activation Technique ◽  
Factors Affecting ◽  
Nano Zinc ◽  
Adsorbent Materials ◽  
Nano Adsorbent

In this study, nano-adsorbent materials were synthesized from two different precursors by thermal activation technique. The first was the synthesizing of nano-zinc silicate from chemical reagents of zinc oxide and commercial silica gel. The second was the preparation of nano-pore size activated carbon from different biomass. The synthesized nano-adsorbent materials were characterized by different techniques; Surface Area, FTIR, XRD and SEM. The prepared nano-adsorbent materials were applied in the sorption and separation of some heavy metals from aqueous solution. These metals includes; Pb (II), Ni(II), Co(II), Mn(II) and Li(I). Some factors affecting on the sorption process (e.g. contact time and pH) were investigated. It was found that: the nano-zinc silicate (of ratio 1:1 thermally treated at 700 0C) and nano-pores activated carbon (prepared from saw dust impregnated with 70% H3PO4 overnight, then heated to 500 0C in presence of steam for 80 min.) were the best samples for sorption and separation of concerned heavy metals.

scholarly journals Removal of Fluoride from Aqueous Solution Using Biomass-Based Adsorbents: A Review

2019 ◽  
Vol 40 ◽  
pp. 44-51 ◽  
Author(s):  
Ram Lochan Aryal ◽  
Bhoj Raj Poudel ◽  
Surendra K Gautam ◽  
Hari Paudyal ◽  
Kedar Nath Ghimire
Keyword(s):  
Aqueous Solution ◽  
Separation Techniques ◽  
Fluoride Uptake ◽  
Adsorption Capacities ◽  
Biomass Materials ◽  
Modified Forms ◽  
Extensive List

Various separation techniques have been successful for the removal of fluoride from aqueous solution. In this review, an extensive list of various biomass-based adsorbents from literature has been explored and their adsorption capacities under different conditions for the removal of fluoride available in the literature to date are presented. Several adsorbents have shown good adsorption capacities; however, modified biomass had shown excellent adsorption capacities compared to commercial materials. This paper reviews the fluoride uptake capacities of biomass materials and their modified forms as adsorbents against different experimental limits.

scholarly journals Removal of Radioactive Iodide by Surfactant-Modified Zeolites

2003 ◽  
Vol 21 (4) ◽  
pp. 373-381 ◽  
Author(s):  
Hossein Faghihian ◽  
Akbar Malekpour ◽  
Mohammad G. Maragheh
Keyword(s):  
Adsorption Capacity ◽  
Adsorption Isotherms ◽  
Exchangeable Cations ◽  
Natural Zeolites ◽  
Zeolite Surface ◽  
Surfactant Modification ◽  
Liquid Wastes ◽  
Modified Zeolites ◽  
Modified Forms ◽  
Adsorbent Materials

The removal of radionuclides such as 129I and 131I from radioactive liquid wastes was studied. Two natural zeolites were modified with different quaternary alkylammonium ions to replace the exchangeable cations from the zeolite surface and used as adsorbent materials. The quaternary ions used for such purpose were hexadecyltrimethylammonium, tetradecyltrimethylammonium, dodecyltrimethylammonium, tetrabutylammonium and tetramethylammonium, respectively. Some of the modified forms exhibited an adsorption capacity much higher than those of the respective natural samples. In contrast, the adsorption capacity was negligible when tetrabutylammonium and tetramethylammonium ions were used. Adsorption experiments were conducted by batch and continuous experiments, and adsorption isotherms constructed from the data obtained. The effect of interfering anions on the adsorption capacity was also investigated as were the breakthrough behaviours of radioiodide in a column charged with the various adsorbents. Desorption of iodide from the modified zeolites into different solutions was also investigated. It was concluded that, in some cases, surfactant modification was an efficient process for the uptake and immobilization of iodide.

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