Simultaneous removing of Pb2+ ions and alizarin red S dye after their complexation by ultrasonic waves coupled adsorption process: Spectrophotometry detection and optimization study

Abstract

Funthenalized chitosan (CS) was composited with mesoprous SBA-15 and characterized via. different techniques such as FT-IR and FE-SEM. Subsequently, this new material was applied for simulations ultrasound-assisted adsorption of Pb ion and alizarin red S (ARS) dye after their complexation. Efficient conventional variables in adsorption process such as initial ARS and Pb concentration, adsorbent mass and sonication time were studied by small central composite design (CCD) and optimized with desirability function approach. Lack of fit testes and model summary statistics for linear, 2FI, quadratic and cubic models were investigated and according to the insignificant lack of fit and maximizing the R-squared (R), adjusted R-squared and the predicted R-squared quadratic model was selected for other step analysis for removal of ARS dye, while, for Pb ions 2FI model was selected as best model. Quadratic model ANOVA for ARS dye removal shows the F-value parameter (683.91), very low p-value model (<0.0001) and p-value lack of fit (0.0568) that implied this model was highly significant. Also, 2FI model ANOVA for Pb ions removal shows the F-value parameter (282.51), very low p-value model (<0.0001) and p-value lack of fit (2.05). According to desirability function approach maximum removal percentage of ARS (87.61%) and Pb ions (83.54%) was shown at optimum of condition that were set as at: 25 and 25mgL, 0.028g and 11.8min for initial ARS and Pb ions concentration, adsorbent mass and sonication time, respectively. Finally, it was found that the equilibrium and kinetic of adsorption process follow the Langmuir isotherm and pseudo-second-order kinetic model, respectively. From the Langmuir isotherm, maximum monolayer capacity (q) was obtained 50.25 and 57.14mgg for ARS and Pb ions removal, respectively.

Removal of arsenic (III) and arsenic (V) from aqueous solutions through adsorption by Fe/Cu nanoparticles

“…Although these methods are effective for remediation of arsenic, some concerns and limitations related to their uses are still present, like the cost or sludge management. Among these technologies, adsorption is a commonly used process, which involves less production of sludge or toxic intermediates and provides flexibility in design and operation . Traditionally, some adsorbents like activated alumina (AA), activated carbon (AC), copper–zinc granules and granular ferric hydroxide have been used to remove arsenic from contaminated water, but recently, nano‐zerovalent iron particles have been introduced as a new class of adsorbent for contaminant removal due to their unique features.…”

Use of metal composite MOF‐5‐Ag2O‐NPs as an adsorbent for the removal of Auramine O dye under ultrasound energy conditions

“…R 2 ) and predicted R 2 (pred. R 2 ) were used to assess the quality of the model . Interpretation of the three‐dimensional (3D) plots provides the best interaction conditions …”

In vitro curcumin delivery and antibacterial activity of RuS2 and RuO2 nanoparticles loaded chitosan biopolymer

“…Lobsters were procured from Persian Gulf, IR. Iran and curcumin was prepared from Merck company and other equipment's, software and chemical reagents were used according to manufacture recommendation correspond to our previous publication …”

“…Iran and curcumin was prepared from Merck company and other equipment's, software and chemical reagents were used according to manufacture recommendation correspond to our previous publication. [60][61][62][63][64] 2.2 | Preparation of RuO 2 -NPs-CS, RuS 2 -NPs-CS carrier Extraction of chitosan from lobster shells was performed as follows: the shells were removed from lobsters and washed thoroughly with distillated water, dried and grinded in a mortar. Then, the shell powders were demineralized using 10% HCl for 24 h, neutralized, washed and dried.…”