Application of response surface methodology for simultaneous removal of major cations from seawater using metal oxide nanostructures

被引：3
|
作者：
Ramutshatsha, Denga [1 ]
Ngila, J. Catherine [1 ]
Ndungu, Patrick G. [1 ]
Nomngongo, Philiswa N. [1 ,2 ,3 ]
机构：
[1] Univ Johannesburg, Dept Chem Sci, Doornfontein Campus,POB 17011, ZA-2028 Johannesburg, South Africa
[2] Univ Johannesburg, DSI Mintek Nanotechnol Innovat Ctr, ZA-2028 Doornfontein, South Africa
[3] Univ Johannesburg, DSI NRF SARChI Chair Nanotechnol Water, ZA-2028 Doornfontein, South Africa
来源：
WATER SA | 2020年 / 46卷 / 02期
关键词：
adsorption; brine; multivariable optimization; nanomaterials; seawater; SOLID-PHASE EXTRACTION; WATER DESALINATION; ONLINE PRECONCENTRATION; OPTIMIZATION; ADSORPTION; IONS; PARAMETERS; MEMBRANE; SUPERCAPACITOR; SODIUM;
D O I：
10.17159/wsa/2020.v46.i2.8247
中图分类号：
TV21 [水资源调查与水利规划];
学科分类号：
081501 ;
摘要：
The objectives of this study were to assess the suitability of metal oxide nanomaterials for removal of major cations Na+, K+, Ca+ and Mg2+ from seawater. The as-synthesised nanomaterials were characterized using different techniques, such as XRD, TEM, and BET. The simultaneous removal of Na+, K+, Ca+ and Mg2+ ion from aqueous solutions by alpha-Fe2O3 and SiO2/Nb2O5/Fe2O3 nanostructures was studied using batch method. The influence of different experimental parameters (such as initial metal ion concentrations, mass of adsorbent, sample pH and contact time) that affect the simultaneous removal of metal ions was studied using response surface methodology (RSM) based on small central composite design (SCCD). Under optimised conditions, the highest percentage removal was 75%, 92%, 93% and 85% for Na+, K+, Ca2+ and Mg2+, respectively.
引用
收藏
页码：313 / 321
页数：9
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