Parameter Screening for the Important Factors Influencing the As(V) Adsorption Using a Plackett-Burman Design

Abstract

The adsorption efficiency of As (V) ions from an aqueous solution was investigated. The adsorption experiments were carried out in a batch reactor. The effects of operating parameters; i.e. the absorbent dose (g/L), the pH, the adsorption temperature (°C), the As (V) initial concentration (ppb), and type of adsorbents, on the adsorption efficiencies were studied. A PlackettBurman experimental design was used to screen for the important factors that influence As (V) adsorption. It has been found that the most important effect on the As (V) adsorption capacity was the type of adsorbent. The factor importance could be written in descending order as follows: the type of adsorbents, the adsorbent dose, the As (V) initial concentration, the adsorption temperature, and the pH.

Methanolysis of Jatropha curcas oil using K$_{2}$CO$_{3}$/CaO as a solid base catalyst

“…23 The peak at around 1783.92 cm −1 in K 2 CO 3 /CaO may be due to the K 2 CO 3 group. 23 The FTIR peak position at 3644.77 cm −1 indicates the presence of a surface hydroxyl group. Furthermore, another peak on 35% K 2 CO 3 /CaO at 3696 cm −1 is responsible for the presence of an isolated OH group.…”

“…11 The bands at 1435.25 cm −1 and 867.58 cm −1 in K 2 CO 3 /CaO correspond to the C-O bond. 23 The wide and strong bands at around 418 cm −1 and 578 cm −1 in K 2 CO 3 /CaO correspond to Ca-O bonds. 23 The peak at around 1783.92 cm −1 in K 2 CO 3 /CaO may be due to the K 2 CO 3 group.…”

“…23 The wide and strong bands at around 418 cm −1 and 578 cm −1 in K 2 CO 3 /CaO correspond to Ca-O bonds. 23 The peak at around 1783.92 cm −1 in K 2 CO 3 /CaO may be due to the K 2 CO 3 group. 23 The FTIR peak position at 3644.77 cm −1 indicates the presence of a surface hydroxyl group.…”