2013
DOI: 10.1016/j.mseb.2013.03.011
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Magnetite–hematite nanoparticles prepared by green methods for heavy metal ions removal from water

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Cited by 138 publications
(64 citation statements)
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“…The maximum arsenic adsorption values were 3.69 mg/g for As(III) and 3.71 mg/g for As(V) at pH = 2, while for Cr(VI), 2.4 mg/g as was adsorbed at the same pH. In a previous work [5], magnetite and mixed magnetite-hematite nanoparticles were synthesized by different chemical methods such as combustion and coprecipitation then employed as sorbents for removal of Pb(II),Cd(II)and Cr(III) ions from water. It was found that the mixture composition, particle size, morphology and thus, the sorption ability was affected by the synthesis method.…”
Section: Introductionmentioning
confidence: 70%
See 1 more Smart Citation
“…The maximum arsenic adsorption values were 3.69 mg/g for As(III) and 3.71 mg/g for As(V) at pH = 2, while for Cr(VI), 2.4 mg/g as was adsorbed at the same pH. In a previous work [5], magnetite and mixed magnetite-hematite nanoparticles were synthesized by different chemical methods such as combustion and coprecipitation then employed as sorbents for removal of Pb(II),Cd(II)and Cr(III) ions from water. It was found that the mixture composition, particle size, morphology and thus, the sorption ability was affected by the synthesis method.…”
Section: Introductionmentioning
confidence: 70%
“…A black precipitate is formed thereafter that was left to coagulate. The precipitate was washed with water, filtered and dried in air [5].…”
Section: Synthesis Of Magnetitementioning
confidence: 99%
“…Todos os picos apresentaram-se com elevada intensidade e elevada largura basal, indicando a formação de material cristalino formado por nanopartículas. Esta mesma formação foi obtida em [43], quando foi sintetizada uma mistura de magnetita e hematita pelas seguintes rotas: copreciptação com atmosfera ambiente e N 2 ; e combustão em micro-ondas com diferentes precursores (citratos-nitratos, glicina-nitratos). O tamanho do cristalito das amostras, calculado usando a equação de Scherrer [44], foi 40, 45 e 43 nm para as amostras NPMs, NPMs@SiO 2 e NPMs@SiO 2 /Q, respectivamente.…”
Section: Resultsunclassified
“…O tamanho do cristalito das amostras, calculado usando a equação de Scherrer [44], foi 40, 45 e 43 nm para as amostras NPMs, NPMs@SiO 2 e NPMs@SiO 2 /Q, respectivamente. Estes resultados corroboraram os encontrados em [43,45]. Analisando os resultados, pôde-se observar um leve aumento do tamanho do cristalito quando foi acrescentado o APTMS às NPMs, devido ao fato do APTMS ser um material amorfo.…”
Section: Resultsunclassified
“…Chromium (III) is nontoxic when present in trace level but it is mutagenic in 6+ state. Though Cr (III) is not toxic, it can be oxidized to be in toxic form, chromium (VI), in natural waters (Kannan 1995, Ahmed et al 2013. Cr (VI) is carcinogenic and toxic.…”
Section: Introductionmentioning
confidence: 99%