Removal of Heavy Metals Using Nanostructured Graphite Oxide, Silica Nanoparticles and Silica/Graphite Oxide Composite

被引：107
作者：
Sheet, Imtithal [1 ]
Kabbani, Ahmad [2 ]
Holail, Hanafy [1 ]
机构：
[1] Beirut Arab Univ, Dept Biol & Environm Sci, Fac Sci, POB 11-5020, Beirut, Lebanon
[2] Lebanese Amer Univ, Sch Arts & Sci, Dept Chem, Beirut, Lebanon
来源：
TECHNOLOGIES AND MATERIALS FOR RENEWABLE ENERGY, ENVIRONMENT AND SUSTAINABILITY (TMREES14 - EUMISD) | 2014年 / 50卷
关键词：
Adsorption; Langmuir and Freundlich Isotherms; Heavy metals; Nanostructured graphite oxide; Silica nanoparticles; Silica/graphite oxide composite; AQUEOUS-SOLUTIONS; ACTIVATED CARBON; LEAD(II) IONS; ADSORPTION; WATER;
D O I：
10.1016/j.egypro.2014.06.016
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
Heavy metals are known to be toxic for living organisms even if they are present at low levels. The presence of heavy metals and other pollutants in water continues to be a major concern and the removal of such contaminant is considered to be a major problem in environmental remediation. In the present study, nanostructured graphite oxide, silica/graphite oxide composites and silica nanoparticles were used for the removal of the heavy metal ions from aqueous solutions by a batch adsorption method and have been modelled using classical Langmuir and Freundlich adsorption isotherms. The results revealed that the adsorption of heavy metals by nanostructured graphite oxide was observed in the following order: nickel > zinc > lead > cadmium > chromium. Langmuir adsorption isotherm results showed that graphite oxide is an effective adsorbent for the removal of Nickel ions from aqueous solutions, while Freundlich data obtained for Cadmium, Chromium, Lead, Nickel and Zinc ions suggest monolayer type of adsorption by graphite oxide. Results showed that silica/graphite oxide composite (2: 3) is a highly effective adsorbent material for heavy metal ions and highly recommended to be used in water purification technologies. (C) 2014 Elsevier Ltd.
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页码：130 / 138
页数：9
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