Preparation and characterization of andisol-zeolite-fly ash-activated carbon (AZFC) as potential adsorbent for metal ion removal

Haryanto, Antonius Agus Bambang; Ramelan, Ari Handono; Budiastuti, Maria Theresia Sri; Pranoto, Pranoto

doi:10.1063/5.0032586

Cited by 1 publication

(2 citation statements)

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“…The adsorption performance can be improved in several ways including increasing the pore size [6], increasing the surface area and adding active groups [8]. The pore size of activated andisol can be up to 5.46 nm [12], which can be increased by treating andisol in acidic (pH 4) or basic (pH 10) pH as activation using HCl or NaOH [6]. Cellulose is not a porous material, so to increase its adsorption performance, increase the number of active groups.…”

Section: Introductionmentioning

confidence: 99%

“…The active group will increase as the surface area increases. The surface area of activated andisol can have a size of up to 142.40 m 2 /g [12], while the surface area of microcrystalline cellulose is 1.32 m 2 /g and the pore size including mesopores is 22.72 nm. The surface area is increased by reducing the particle size of the adsorbent or modifying it.…”

Section: Introductionmentioning

confidence: 99%

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Andisol and microcrystalline cellulose from Typha angustifolia for auramine O adsorption

Pranoto

Suryanti

Adawiyah

2023

IJAAS

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Andisol has a large surface area, is mesoporous, and contains the active groups' silanol (Si-OH) and aluminol (Al-OH). Besides andisol, cellulose is a good adsorbent, because microcrystalline cellulose has an active hydroxyl group (OH). The number of active adsorbent groups can be enhanced by chemically modifying the surface area (increment), or adding other materials. These modifications included alkaline modified-andisol with the addition of NaOH to increase pore size, cellulose hydrolysis with HCl to increase surface area, and andisol modification with the inclusion of other materials, mainly cellulose, to increase surface area. After the adsorption process is complete, the adsorption capacity of andisol-microcrystalline cellulose (AMS) to auramine O (AO) is known. As an adsorbent for AO, the surface area of BET andisol is 25.92 m2/g and the pore diameter is 14.40 nm, while the surface area of microcrystalline cellulose and AMS adsorbent are 26.60 m2/g and 18.60 m2/g, respectively. The maximum AO adsorption conditions by AMS were at pH 7, optimum at a contact time of 5 minutes, and maximum at a concentration of 40 mg/L with an adsorbent ratio of 1:1. The adsorption kinetics and isotherm more closely followed the pseudo second-order and Langmuir isotherm with an adsorption capacity of 5.24 mg/g.

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