Autor: Mohadi, Risfidian - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Effective Removal of Iron (II) from Aqueous Solution by Adsorption using Zn/Cr Layered Double Hydroxides Intercalated with Keggin Ion
Autorzy:: Oktriyanti, Melantina
Palapa, Neza Rahayu
Mohadi, Risfidian
Lesbani, Aldes
Powiązania:: https://bibliotekanauki.pl/articles/125462.pdf
Data publikacji:: 2020
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: adsorption
iron(II)
desorption
zinc
chromium
layered double hydroxide
Opis:: Zn/Cr and Zn/Cr layered double hydroxides (LDHs) intercalated with Keggin ion [α-SiW₁₂O₄₀]^4-were successfully synthesized at room temperature and pH value of 10. The synthesized materials were characterized by means of the XRD, BET, and FT-IR analyses and used as an adsorbent iron(II). The adsorption process was investigated by studying pH, the kinetics, and thermodynamic properties of the adsorption process. The results showed the interlayer Zn/Cr LDHs was 7.53 Å and increase to 10.26 Å on Zn/Cr LDHs intercalated with Keggin ion [α-SiW₁₂O₄₀]^4-. The BET analysis showed that the pore volume of both materials increased from 0.063 cm³ g^-1 to 0.163 cm³ g^-1. The pH point zero charge measurement for the Zn/Cr LDHs material was 10 while LDHs Zn/Cr intercalated with Keggin ion [α-SiW₁₂O₄₀]^4- was 8. Zn/Cr LDHs intercalated with Keggin ion [α-SiW₁₂O₄₀]^4- has higher adsorption capacity than Zn/Cr LDHs without intercalation. Desorption of iron (III) was successfully conducted using HCl as reagent showing the involvement of ion exchange in the adsorption.
Źródło:: Journal of Ecological Engineering; 2020, 21, 5; 63-71
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Tytuł:: Development of Renewable Material Hydrochar-Based CaAl Layered Double Hydroxide to Overcome Methyl Red Dyes Contaminant
Autorzy:: Mohadi, Risfidian
Juleanti, Novie
Palapa, Neza Rahayu
Hidayati, Nurlisa
Lesbani, Aldes
Powiązania:: https://bibliotekanauki.pl/articles/2068466.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: Ca/Al
layered double hydroxide
hydrochar
methyl red
selectivity
Opis:: The preparation of the CaAl/HC composite was carried out with a supporting material in the form of hydrochar from duku skin. The success of the preparation was demonstrated by XRD, FT-IR, and BET analysis. The diffractogram of CaAl/HC showed diffraction peaks at 2θ = 10.16° (003), 18.0° (002), 20.15° (006) and 65.4° (110). The diffraction showed similarity to diffraction in CaAl and hydrochar double layer hydroxyl. The FT-IR spectrum of CaAl/HC also showed similarity to the CaAl/HC double layer hydroxyl at 3448, 1635, and 1381 cm-1. The characteristic spectrum of the hydrochar also appeared in CaAl/HC at 20.15. BET analysis showed an increase in the surface area of CaAl/HC before modification of 11.842 m2/g and increased to 22.635 m2/g of CaAl/HC. The ability of CaAl/HC as an adsorbent is determined through several parameters including selectivity, regeneration, isotherm, and thermodynamics. The results of dye selectivity showed that CaAl/HC was more likely to absorb MR dyes in a mixture of dyes (DG, MO, PR, MR, CR, and DR). The regeneration results showed the ability of CaAl/HC which lasted up to 73.26% in the fifth cycle.
Źródło:: Journal of Ecological Engineering; 2022, 23, 3; 17--25
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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