Browsing by Author "Mukhlis, Mukhlis"

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    MODIFIKASI LEMPUNG MAREDAN MENGGUNAKAN NANOPARTIKEL PERAK SEBAGAI ADSORBEN METHYLENE BLUE
    (Elfitra, 2023-05) Alvionita, Nur Afni; Kartika, Ganis Fia; Mukhlis, Mukhlis
    Clay is composed of (AlO4)5- octahedral and (SiO4)4- tetrahedral with water molecules moving freely in their cavities. Metal ions, usually alkaline earth metals (Na, K, Mg, Ca, and Fe) fill the cavity. Due to its chemical composition and structure, clay minerals have the potential to be used as ion exchangers, adsorbents, and molecular filters in wastewater treatment. This study aims to determine the adsorption capacity of silver nanoparticle modified clay in adsorbing methylene blue. In this study, the silver nanoparticle modified clay synthesis process was carried out using a two-step adsorption - reduction method. The value of the adsorption capacity of methylene blue by silver nanoparticle modified clay was 31.10 mg/g with an adsorbent dose of 80 mg, methylene blue concentration of 50 ppm, contact time 20 minutes, pH 11, and at 40℃. The adsorption mechanism that occurs involves electrostatic interactions between methylene blue dye cations and the negative charge (-OH) on the clay surface.
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    OPTIMASI KECEPATAN PENGADUKAN DAN SUHU DALAM PENJERAPAN METHYLENE BLUE MENGGUNAKAN LEMPUNG MAREDAN
    (Elfitra, 2023-07) Agnecilya, Yola; Mukhlis, Mukhlis
    Maredan natural clay is a potential adsorbent to eliminate methylene blue in the water. It is because of its abundant presence in the nature, a big and large surface, the high thermal stability, and the big exchange capacity of the cation. The purpose of this research was to determine the optimum stirring speed and temperature in methylene blue adsorption using Maredan nature clay. The method used in this research was methylene blue is adsorption. The characterization of Maredan nature clay was carried out before, after adsorption, and after regeneration using Fourrier Transform Infra-Red (FTIR). Based on the analysis result of Maredan nature clay using FTIR, it was found that in Maredan nature clay before the adsorption, there were some groups such as Si-O-Si, Si-O-Al, Al-O and –OH while in Maredan clay after adsorption, there were some groups such as Si-O-Si, Si-O-Al, Al-O, - OH, C=N, C=C and C-N. The optimum stirring speed and temperature in methylene blue adsorption using Maredan natural clay obtained respectively in 150 rpm and temperature 350C with adsorption efficiency amounted 98,1600%.
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    OPTIMASI pH ADSORPSI ION TIMBAL(II) MENGGUNAKAN LEMPUNG MAREDAN
    (Elfitra, 2023-09) Harahap, Fadhil Maulana; Mukhlis, Mukhlis
    Maredan clay is a type of clay composed of tetrahedral silica and octahedral alumina compounds which can act as adsorbents. This research aims to determine the optimum conditions of solution pH (variations 2, 4, 6, 8, 10, and 11) on the adsorption efficiency of Maredan clay in adsorbing lead(II) ions. Maredan clay was characterized by determining functional groups using testsFourrier Transform Infra-Red (FTIR). The results of Maredan clay analysis using FTIR show that before and after adsorption there are Si-OH, Si-O-Si, Si-O-Mg, Si-O-Al and –OH functional groups, while after adsorption there are additional Pb-O-Pb functional groups. Optimum adsorption parameters were obtained at pH 10 with an adsorption efficiency of 98.57% and an adsorption capacity of 7.8048 mg/g.
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    OPTIMASI WAKTU KONTAK DAN KONSENTRASI ION Cr(VI) MENGGUNAKAN LEMPUNG ALAM MAREDAN
    (Elfitra, 2023-07) Andriyani, Ratih; Mukhlis, Mukhlis
    Maredan natural clay is a local potential that has been widely utilized as an adsorbent material because it has a high silica and alumina contents. Maredan natural clay is utilized as an adsorbent material in the adsorption process to adsorb Cr(VI) metal ions. The purpose of this study was to determine the adsorption efficiency, determine the adsorption isotherm and kinetics model as well as the regeneration ability of Maredan natural clay. The method used in this research is adsorption method. The parameters used in this study are contact time and adsorbate concentration. In the contact time the variations made are 10, 20, 30, 40 and 50 minutes, while in the adsorbat concentration the variations made are 25mg/L, 50mg/L, 100mg/L, 150mg/L, and 200mg/L. Regeneration uses a desorption solution of 1 M HCl. Characterization of Maredan natural clay using Fourrier Transform Infra-Red (FTIR) to show the functional groups of Maredan natural clay. The results of Maredan clay analysis using FTIR have several groups such as Si-OSi, Si-O-Al, Al-O and -OH on Maredan clay before adsorption. Optimum parameters in adsorbing Cr (VI) ions were obtained at a contact time of 40 minutes and 50 mg/L with an adsorption efficiency of 60.67% and an adsorption capacity of 1.4153 mg/g. The adsorption kinetics model follows the second-order pseudo with R2 = 0.9994. The adsorption isotherm model follows the Langmuir isotherm with R2 = 0.9928 which indicates the adsorption is homogeneous and monolayer.
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    PENGARUH DOSIS ADSORBEN TERHADAP PROSES ADSORPSI RHODAMINE B MENGGUNAKAN LEMPUNG MAREDAN
    (Elfitra, 2023-11) Riva, Putri Lala; Mukhlis, Mukhlis
    Clay is composed of alumina silicate minerals with a layered and porous crystal structure and can act as an adsorbent in adsorption processes. This research aims to determine the optimal adsorbent dosage (0.1; 0.3; 0.5; 0.7; 0.9 grams) in the adsorption process of Rhodamine B using natural Maredan clay. Characterization of Maredan clay was conducted before and after adsorption using Fourier Transform Infrared (FTIR) to identify the functional groups present in the adsorbent. The FTIR analysis of Maredan clay before and after adsorption revealed the presence of functional groups such as O-H stretching, Si-O, and Al-O-Si, with the addition of the C=C functional group after adsorption. The best condition was observed at an adsorbent dosage of 0.9 g, with an adsorption efficiency of 94.11% and an adsorption capacity of 2.6396 mg/g.