Application of response surface methodology (RSM) for experimental optimization in biogenic silica extraction from rice husk and straw ash

被引：6

作者：

Zewide, Yigezu Temesgen ^{[1
,2
]}

Yemata, Temesgen Atnafu ^{[1
]}

Ayalew, Adane Adugna ^{[1
]}

Kedir, Hawi Jihad ^{[1
,3
]}

Tadesse, Asab Alemneh ^{[1
,8
]}

Fekad, Asmarech Yeshaneh ^{[1
,7
]}

Shibesh, Alemayehu Keflu ^{[1
]}

Getie, Fentahun Adamu ^{[6
]}

Tessema, Tegen Dagnew ^{[1
]}

Wubieneh, Tessera Alemneh ^{[4
]}

Kululo, Wondmagegn Wonago ^{[1
]}

Mihiret, Muluken Tilahun ^{[1
,5
]}

机构：

[1] Bahir Dar Univ, Bahir Dar Inst Technol, Dept Chem Engn, POB 26, Bahir Dar, Ethiopia

[2] Dire Dawa Univ, Dept Chem Engn, POB 1362, Dire Dawa, Ethiopia

[3] Arba Minch Univ, Dept Chem, POB 21, Arba Minch, Ethiopia

[4] Bahir Dar Univ, Bahir Dar Inst Technol, Dept Mat Sci & Engn, POB 26, Bahir Dar, Ethiopia

[5] Univ Gondar, Dept Chem Engn, POB 196, Gondar, Ethiopia

[6] Injibara Univ, Coll Nat & Computat Sci, Dept Chem, POB 40, Injibara, Ethiopia

[7] Ethiopian Inst Agr Res, Natl Agr Biotechnol Res Ctr, POB 249, Holeta, Ethiopia

[8] Ethiopian Inst Agr Res, POB 249, Addis Ababa, Ethiopia

来源：

SCIENTIFIC REPORTS | 2025年 / 15卷 / 01期

关键词：

Rice husk; Rice straw; Optimization; Central composite design; Biogenic silica; ACTIVATED CARBON; AMORPHOUS SILICA; ELECTROCHEMICAL TREATMENT; PROXIMATE ANALYSIS; AQUEOUS-SOLUTION; WASTE-WATER; METAL-IONS; COMBUSTION; REMOVAL; NANOPARTICLES;

D O I：

10.1038/s41598-024-83724-6

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

This work aimed to extract silica from combination of rice husk (RH and Rice straw (RS) by optimizing the ash digesting process parameters with the aid of response surface methodology (RSM). The effects of three independent ash digestion process factors like sodium hydroxide concentration (1-3 M), temperature (60-120 degrees C) and time (1-3 h), for silica production from the mixture of rice husk (RH) and rice straw (RS) were studied. A quadratic model was used to correlate the interaction effects of the independent variables for maximum silica production at the optimum process parameters by employing central composite design (CCD) with RSM. The work indicates that the temperature is the most significant parameter among the model terms, followed by NaOH concentration, then time for digestion of ash for silica production. It may be because of the larger F-value for temperature, which influences to high extent of ash digestion for silica production. The proximate analysis discovered that RH/RS possessed compositions of high ash, volatile matter and fixed carbon content whereas low moisture content, i.e., 20.5 +/- 0.46, 67.1 +/- 0.78, 15.8 +/- 0.35 and, 6.6 +/- 0.37 wt.%, correspondingly. The characterization of RH/RS and silica were performed by employing thermogravimetric (TG) and differential thermal (DT), Fourier transforms infrared spectroscopy (FTIR), X-ray fluorescence spectroscopy (XRF) and Brunner-Emmet-Teller (BET) for confirmation of the silica production. Hence, this current study concludes that silica materials obtained from RH/RS (with purity > 97.35 wt.%) may be new materials in the Si-C-O system that may be used in construction, ceramics and silica gel that helps to absorb moisture.

引用

页数：17