Production and Optimization of Bio-Based Silica Nanoparticle from Teff Straw (Eragrostis tef) Using RSM-Based Modeling, Characterization Aspects, and Adsorption Efficacy of Methyl Orange Dye

Table 6

Constraints.

Name	Goal	Lower limit	Upper limit	Importance
A: temperature	Is in range	85	95	3
B: [NaOH]	Is in range	1.5	2.5	3
C: RPM	Is in range	400	500	3
D: time	Is in range	70	100	3
Yield of silica	Maximize	59.38	85.85	3