Effect of peanut hull ash dosage on the degree of influence of operation variables on the adsorption of nickel ion from aqueous solution using peanut hull ash

Three novel biosorbents based on modified peanut shells for direct red 80 removal: parameter optimization, process kinetics and equilibrium

“…Statistical analysis and regression model. Compared to traditional single parameter optimization, response surface (20) where y expresses the adsorption capacity of DR80; x 1 , x 2 , and x 3 denote initial concentration of the dye, temperature, and time of adsorption reaction, respectively. Analysis of variance (ANOVA) method was applied to further explore the signicance and accuracy of the three models (eqn ( 18)-( 20)) and the calculated results were shown in Table 2S (ESI †).…”

“…However the use of agricultural and industrial wastes as adsorbents have attracted great attention for the removal of dyes owing to their abundance and low price. [8][9][10][11][12] Peanut shell (PS) is an abundant agricultural waste product with 4.5 million tons produced annually in China, 13 and is a complex material consisting of minerals, lipids, cellulose and polyphenols, 14 and has been successfully utilized to remove heavy metals and dyes from wastewater such as Zn(II) and Cd(II), 15 Se(IV), 16 Cu(II), 15,17,18 Cr(III), 18 Pb(II), 15,19 Ni(II), 20 three cationic dyes (methylene blue, brilliant cresyl blue and neutral red), 21,22 reactive black 5, 14 and three anionic dyes (amaranth, sunset yellow and fast green FCF). 23 Recently, a few researchers have modied PS through different methods to improve their adsorption of contaminants.…”

Uso de biomasas para la adsorción de plomo, níquel, mercurio y cromo

“…Los autores investigaron las variables de operación y los efectos que pudieran tener en el proceso de adsorción: el pH, el tiempo de contacto, la concentración inicial de adsorbato, la velocidad de agitación y la temperatura. Concluyeron que se obtenían buenos resultados cuando la dosis del adsorbente y el pH eran altos (pH 6; dosis de 3,0g/L; temperatura de 50°C; agitación de 180 rpm) (Muhammad et al, 2013;Al-Othman, Naushad, & Al, 2012;Wua, Lin, & Wang, 2011).…”