Performance of silica aerogels modified with amino functional groups in PB(II) and CD(II) removal from aqueous solutions

Faghihian, Hossein; Nourmoradi, Heshmatollah; Maryam, Shokouhi

doi:10.2478/v10026-012-0059-4

Cited by 56 publications

(32 citation statements)

References 32 publications

(18 reference statements)

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“…The values of Q m and b are obtained from the intercept and slope by plotting C e /q e vs. C e of Eq. (8), respectively [31]. The values of R L > 1 and 0 < R L < 1 indicate unfavorable and favorable adsorption, respectively.…”

Section: Adsorption Isothermsmentioning

confidence: 98%

“…The values of R L > 1 and 0 < R L < 1 indicate unfavorable and favorable adsorption, respectively. R L = 0 represents the irreversible adsorption and R L = 1 is linear adsorption [31]. The Freundlich isotherm is an empirical equation applied to explain the adsorption onto the heterogeneous surface of sorbent as Eq.…”

Section: Adsorption Isothermsmentioning

confidence: 99%

“…The value of E (kJ/mol) determines the type adsorption process as physical (E < 8 kJ/mol) or chemical (E > 16 kJ/mol) [31].…”

Section: Adsorption Isothermsmentioning

confidence: 99%

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Removal of copper (II) and nickel (II) from aqueous media using silica aerogel modified with amino propyl triethoxysilane as an adsorbent: equilibrium, kinetic, and isotherms study

Faghihian

Nourmoradi

Maryam

2014

Desalination and Water Treatment

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A B S T R A C TThis study focused on the adsorption of copper (II) and nickel (II) from aqueous solutions onto silica aerogel modified with amino propyl triethoxysilane as a compound containing amino functional group. The batch experiments were conducted at various conditions including contact time, pH, adsorbent dose, and adsorbate content. The results showed that the equilibrium time occurred within 5 h for Ni(II) and 24 h for Cu(II) and the maximum adsorption capacity for both the ions happened at a pH of 6. The kinetic and isotherm adsorption of the modified silica aerogel fitted well to pseudo-second order model and Langmuir model, respectively. The Langmuir isotherm model results showed that the maximum adsorption capacity (Q m ) of the modified adsorbent was 47.6 mg/g for Cu(II) and 27.7 mg/g for Ni(II). Experimental data analysis by Dubinin-Radushkevich isotherm also illustrated that the metals adsorption onto the sorbent was physical in nature. With regard to the sorption capacity obtained by the modified silica aerogel, it can be considered as an efficient sorbent in the removal of the metal ions.

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Section: Adsorption Isothermsmentioning

confidence: 98%

Section: Adsorption Isothermsmentioning

confidence: 99%

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Removal of copper (II) and nickel (II) from aqueous media using silica aerogel modified with amino propyl triethoxysilane as an adsorbent: equilibrium, kinetic, and isotherms study

Faghihian

Nourmoradi

Maryam

2014

Desalination and Water Treatment

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“…Many thousands of years ago, the people of primary societies used various materials in order to beautify their faces [1]. Eye shadow and lipstick are a group of cosmetic products that have been most commonly used in various parts of the world.…”

Section: Introductionmentioning

confidence: 99%

“…Contact with low concentration of lead can cause disorders such as behavioral abnormalities and decreased learning and hearing and can result in adverse effects on central nervous system, reproductive system, hematopoiesis, anemia, and hepatic and renal systems [1, 11–13]. More than 90% of lead absorbed by human is concentrated in the bones with a half-life of greater than 20 years [14].…”

Section: Introductionmentioning

confidence: 99%

Assessment of Lead and Cadmium Levels in Frequently Used Cosmetic Products in Iran

Nourmoradi

Foroghi

Farhadkhani

et al. 2013

Journal of Environmental and Public Health

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This study aims to investigate the content of lead and cadmium in most frequently used brands of cosmetic products (lipstick and eye shadow) in Iran. Fifty samples of lipstick (5 colors in 7 brands) and eye shadow (3 colors in 5 brands) were selected taken from large cosmetic stores in Isfahan (Iran) and lead and cadmium of them were analyzed. The results showed that the concentration of lead and cadmium in the lipsticks was within the range of 0.08–5.2 µg/g and 4.08–60.20 µg/g, respectively. The eye shadow samples had a lead level of 0.85–6.90 µg/g and a cadmium level of 1.54–55.59 µg/g. The content range of the heavy metals in the eye shadows was higher than that of the lipsticks. There was significant difference between the average of the lead content in the different brands of the lipsticks and eye shadows. Thus, the continuous use of these cosmetics can increase the absorption of heavy metals, especially Cd and Pb, in the body when swallowing lipsticks or through dermal cosmetic absorption. The effects of heavy metals such as lead can be harmful, especially for pregnant women and children. Therefore, effort must be made to inform the users and the general public about the harmful consequences of cosmetics.

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Aerogel for Environmental Remediation

Jatoi¹,

Hashmi²,

Mubarak³

et al. 2022

Nanotechnology for Environmental Remediation

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Performance of silica aerogels modified with amino functional groups in PB(II) and CD(II) removal from aqueous solutions

Cited by 56 publications

References 32 publications

Removal of copper (II) and nickel (II) from aqueous media using silica aerogel modified with amino propyl triethoxysilane as an adsorbent: equilibrium, kinetic, and isotherms study

Removal of copper (II) and nickel (II) from aqueous media using silica aerogel modified with amino propyl triethoxysilane as an adsorbent: equilibrium, kinetic, and isotherms study

Assessment of Lead and Cadmium Levels in Frequently Used Cosmetic Products in Iran

Aerogel for Environmental Remediation

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