CD Disertasi

Potensi Adsorben Arang Aktif Buah Jabon Putih (Anthocephalus Cadamba Miq) Dalam Upaya Mitigasi Pencemaran Merkuri Di Lingkungan Perairan = (The Potensial Of Activated Charcoal Adsorbent Of White Jabon Fruit (Anthocephalus Cadamba Miq) In Mitigation Of Mercury Pollution Inteh Water)

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The use of Anthocephalus cadamba Miq which focuses on the wood makes other parts such as the fruit neglected. The fruit which contains cellulose can be used as a biosorbent in the form of activated charcoal to adsorb mercury ions in waters. The aim of this study was to determine the kinetics model and adsorption isotherm of mercury ion by the fruit biosorbent.
Carbonized wind-dried Anthocephalus cadamba Miq at various temperatures and times. Charcoal activation uses NaOH at a certain weight ratio. Functional groups of biosorbents were analyzed using FTIR, morphology and elemental composition were analyzed using SEM-EDS. Surface area, pore volume and pore radius were analyzed by BET. Mercury concentrations were analyzed using ICP-AES. The research was conducted in Batch. Optimum biosorption efficiency and capacity were obtained through variations in adsorbent mass, contact time, stirring speed, pH and adsorbate mass. Biosorbent was regenerated using 1 M HCl desorption reagent 5 times.
Charcoal yield reached 66.55% (carbonization temperature 300oC and carbonization time 30 minutes). The optimum NaOH activator was at a ratio of 1:3 (1291.92 mg/g iodine adsorption capacity and 25.10 mg/g methylene blue adsorption capacity). Optimum biosorption at 1 g biosorbent mass, 40 minutes contact time, 80 rpm stirring speed, pH 6 and 80 mg/L adsorbate concentration with 99.14% adsorption efficiency and 3.98 mg g-1 adsorption capacity. The percentage of regeneration reaches 99-87% after 5 times of rebiosorption. The pHpzc value (5.5) is lower than the optimum pH (6) indicating that the biosorbent is negatively charged and is good for adsorbing mercury. The surface of the biosorbent contains aliphatic C-H, aromatic C-H, C=O, C-O-C, N-H and O-Hg functional groups. Surface area (BET) 353.039 m2/g. SEM-EDS showed that the biosorbent has the elements O, C, Na, N, Cl, K and Hg with an uneven texture, the distance between the particles looks very tight, has a small grain size, open pores. The biosorption kinetics model follows the second-order pseudo model (reaction rate k 0.7118 g/mg.min) assuming the presence of inter-valence forces or electron exchange between the adsorbent and the adsorbate. The biosorption isotherm model following Langmuir (R2 = 0.9881) assumes that the active sites on the surface of the adsorbent are homogeneous. The cost of removing Hg2+ ions per gram of biosorbent only requires 0.21US$.
With a relatively high percentage of yield, high biosorption efficiency, repeated use of the biosorbent and low biosorption cost, Anthocephalus cadamba Miq biosorbent has the economic potential to be used to tackle mercury pollution in waters.

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Ketersediaan

Informasi Detail

Judul Seri

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No. Panggil

1610348071

Penerbit

Pekanbaru : Universitas Riau PASCASARJANA DISERTASI S3 Ilmu lingkungan., 2024

Deskripsi Fisik

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Bahasa

Indonesia

ISBN/ISSN

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Klasifikasi

1610348071

Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

DISERTASI S3 ILMU LINGKUNGAN

Info Detail Spesifik

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Pernyataan Tanggungjawab

Mutia

Versi lain/terkait

Lampiran Berkas

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