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Wyświetlanie 1-3 z 3
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
Artykuł
Tytuł:
Soft Ion Divalent Metals toward Adsorption on Zn/Al-POM Layered Double Hydroxide
Autorzy:
Silaen, Luna
Elfita, -
Mohadi, Risfidian
Normah, -
Juleanti, Novie
Palapa, Neza Rahayu
Lesbani, Aldes
Powiązania:
https://bibliotekanauki.pl/articles/2027762.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
soft divalent metal ions
adsorption
polyoxometalate
regeneration
Opis:
Development of Zn/Al layered double hydroxide by intercalation using polyoxometalate (POM) $K_4 [α-SiW_12O_40]$ to Zn/Al-POM was investigated. The success of the modification is evidenced by the XRD, FT-IR, and BET characterization data. XRD characterization showed an increase in the interlayer distance from 8.59 Å in Zn/Al LDHs to 10.26 Å in Zn/Al-POM. This success is also supported by the FT-IR data with the appearance of vibrations around $779–979 cm^{-1}$ which indicates the vibration of the polyoxometalate compound in Zn/Al-POM. Other supporting data in the form of BET also prove an increase in surface area from 1.968 $m^2$/g in Zn/Al LDHs to 14.042 $m^2$/g Zn/Al-POM. The ability of Zn/Al-POM as an adsorbent is proven through several parameters such as kinetics, isotherm, thermodynamics, and regeneration for $Cd^{2+}$, $Pb^{2+}$, $Ni^{2+}$, and $Co^{2+}$. Adsorption kinetics showed that Zn/Al-POM was more likely to follow the pseudo-second-order adsorption kinetics model for $Cd^{2+}$, $Pb^{2+}$, $Ni^{2+}$, and $Co^{2+}$. The results of determining the adsorption isotherm parameters of Zn/Al-POM tend to follow the Freundlich isotherm model with a maximum adsorption capacity of 74.13 mg/g on $Pb^{2+}$. The regeneration process showed that Zn/Al-POM was more resistant than Zn/Al LDHs up to 3 cycles. It was proven that Zn/Al-POM was able to survive in the last cycle up to 69.19% on $Ni^{2+}$.
Źródło:
Journal of Ecological Engineering; 2021, 22, 10; 109-120
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
High Structural Stability and Adsorption Capacity of Zn/Al-Biochar and Cu/Al-Biochar Toward Adsorption of Cr(VI)
Autorzy:
Palapa, Neza Rahayu
Taher, Tarmizi
Siregar, Patimah Mega Syah Bahar Nur
Normah, -
Juleanti, Novie
Wijaya, Alfan
Badri, Arini Fousty
Lesbani, Aldes
Powiązania:
https://bibliotekanauki.pl/articles/1839586.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
layered double hydroxide
chromium
adsorption
reusability
Opis:
Layered double hydroxide (LDH) Zn/Al and Cu/Al was synthesized by using the coprecipitation method under base condition at pH 10 following with formation of composites based on biochar (BC) to form Zn/Al-BC and Cu/ Al-BC. The materials were characterized by XRD, FTIR, BET, and thermal analyses. Furthermore, materials was applied as adsorbent of Cr(VI) on aqueous solution. The performance of composites as adsorbent was evaluated by reusability of adsorbent toward Cr(VI) adsorption process. The results showed that Cu/Al-BC and Zn/Al-BC can reuse the re-adsorption process with the adsorption ability of more than 60%. The adsorption capacity of Cu/ Al-BC and Zn/Al-BC was higher than that of starting materials and up to 384.615 mg/g for Cu/Al-BC and 666.667 mg/g for Zn/Al-BC. Both composites showed the potential adsorbents to remove Cr(VI) from aqueous solution.
Źródło:
Journal of Ecological Engineering; 2021, 22, 4; 213-223
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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