An environmentally friendly batch bioadsorption study of the radionuclides 67Ga from aqueous solutions by fibrous tea waste

Adsorptive Removal of Malachite Green from Model Aqueous Solutions by Chemically Modified Waste Green Tea Biomass

“…Alkane C-H vibrations were identified at 2919 and 2886 cm -1 for the untreated WGT before adsorption and shifted at 2903 and 2842 cm -1 for the WGT after adsorption fact which can be explained by the change in the lignocellulosic structure. 16,54 A distinct band at 1619 cm -1 was observed, Figure 7, that was shifted at 1609 cm -1 after MG adsorption, band that was probably, the result of the stretching vibration of C=O and C-N (Amide I) peptidic bond of proteins. 55 Bands at 1020 cm -1 (before adsorption) and 1010 cm -1 (after adsorption) that could be attributed to the stretching vibration of the C-O groups, shifted after adsorption.…”

Preparation of magnetic porous NiFe2O4/SiO2 composite xerogels for potential application in adsorption of Ce(iv) ions from aqueous solution

“…There are varieties of adsorbents such as active carbon, [14][15][16] carbon nano-tubes, [17][18][19] zeolites, [20][21][22] molecular sieves, [23][24][25] ionexchange membranes, [26][27][28] and bio-adsorbents. 29 Among all of these kinds of materials, silica xerogels with high specic surface area (500-1500 m 2 g À1 ), pore volume (0.03-0.35 g cm À3 ), high porosity (80-99%) and plenty of silanol groups (Si-OH) distributed on the surface could be promising materials to use as effective adsorbents for radionuclides. 30,31 In spite of the excellent performance of silica xerogels when used as adsorbents, there are also some drawbacks.…”

Artifical Neural Network (ANN) Modeling and Analysis of Radioactive Gallium-67 Adsorption from Aqueous Solution with Waste Acorns ofQuercus ithaburensis

“…Consequently, this behavior indicates that the process mainly occurs due to chemical adsorption. 15,16 The tested stirring speeds were (360, 480, 600, and 720) rpm. Figure 1b presents the 67 Ga removal rate versus stirring speed.…”

“…24 A multilayer perceptron (MLP) Table 3. Kinetic Equations Used for Analysis of Kinetic Data 16 kinetic equation linear form of equation plot pseudofirst order lnðq e À q t Þ ¼ ln q e À kt ð10Þ ln(q e À q t ) versus t pseudosecond order…”