Kulit Salak Sebagai Biosorben Potensial Untuk Pengolahan Timbal(II) Dan Cadmium(II) Dalam Larutan

Zein, Rahmiana; Wardana, Novrizaldi; Refilda, Refilda; Aziz, Hermansyah

doi:10.24198/cna.v6.n2.17857

Cited by 8 publications

(9 citation statements)

References 14 publications

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“…Metode seperti pertukaran ion, elektrolisis, dan metode lainnya telah banyak digunakan untuk menangani logam berat. Namun, kelemahan teknik-teknik untuk pengurangan logam berat adalah biaya yang tinggi dan waktu yang lama (Zein et al, 2018). Kelemahan dari metode tersebut dapat dilakukan cara alternatif yakni dengan proses adsorpsi.…”

Section: Pendahuluanunclassified

Untitled

Prabawati,

Aji,

Rahmadhani

2024

JCHEM

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Keberadaan logam Pb (II) dan Cr (VI) sangat berbahaya bagi lingkungan hingga menimbulkan gangguan keseimbangan lingkungan, terutama pada ekosistem perairan. Upaya untuk mengurangi logam berat telah banyak menggunakan berbagai metode, salah satunya adalah adsorpsi menggunakan arang aktif sebagai agen penyerap. Metode ini sangat efektif dan tidak mahal. Salah satu limbah organik yang berpotensi sebagai arang adalah limbah kulit salak. Kajian adsorpsi logam Pb (II) dan Cr (VI) telah dilakukan menggunakan arang kulit salak teraktivasi HCl. Penelitian ini bertujuan untuk mempelajari karakteristik arang aktif kulit salak untuk menurunkan kandungan logam Pb (II) dan Cr (VI). Parameter uji dilakukan pada variasi pH waktu kontak, dan konsentrasi larutan logam. Hasil karakterisasi FTIR menunjukkan adanya gugus -OH, C=C, dan C-O pada permukaan arang aktif kulit salak. Karakterisasi SEM menunjukkan morfologi permukaan arang aktif kulit salak teraktivasi HCl memiliki struktur berpori sehingga diharapkan lebih efektif dalam menyerap ion logam berat. Adsorpsi logam Pb (II) dan Cr (VI) pada variasi pH didapatkan kondisi optimum pada pH 4 dan 2 dengan efektivitas adsorpsi masing-masing sebesar 85,05% dan 17,65%. Adsorpsi logam Pb (II) dan Cr (VI) memberikan waktu stabil pada menit ke 60 dan 90 dengan persen adsorpsi sebesar 42,05% dan 82,90%. Pola isoterm adsorpsi pada penelitian ini mengikuti pola isoterm Langmuir dengan kapasitas adsorpsi logam Pb (II) dan Cr (VI) masing-masing sebesar 0,2278 mg/g dan 0,9999 mg/g serta diperoleh energi adsorpsi sebesar 26,77 kJ/mol dan 26,43 kj/mol. Berdasarkan penelitian yang dilakukan, limbah kulit salak sangat berpotensi sebagai arang aktif dalam mengurangi logam Pb (II) dan Cr (VI). Kata kunci: adsorpsi, logam Pb (II) dan Cr (VI), limbah kulit salak, arang aktif, isoterm adsorps ABSTRACT The contents of Pb (II) and Cr (VI) metals are dangerous for the surrounding environment and can cause environmental disturbances, especially in aquatic ecosystems. The attempts to reduce heavy metals have used many methods, one of which is adsorption, which uses activated charcoal as an absorbent agent. One of the organic wastes that has the potential to be used as charcoal is salacca peel. The study about the adsorption of Pb (II) and Cr (VI) metals was carried out using charcoal from salacca peel activated with HCl. This research aimed to study the characteristics of activated charcoal from salacca peel to reduce the Pb (II) and Cr (VI) metals. The test parameters were carried out at variations in pH, contact time, and concentration of metal solution. The results of the FTIR characterization showed the presence of -OH, C=C, and C-O groups on the surface of the salacca peel charcoal after HCl activation. The characterization using SEM showed that the surface morphology of salacca peel charcoal after HCl activation has a porous structure that was expected to be more effective in absorbing heavy metal ions. The adsorption of Pb (II) and Cr (VI) metals at various pH obtained optimum conditions at pH 4 and 2 with adsorption effectiveness of 85.05% and 17.65%, respectively. The adsorption of Pb (II) and Cr (VI) metals had a stable time at 60 and 90 minutes with the adsorption percentages of 42.05% and 82.90%. The adsorption isotherm pattern in this study followed the Langmuir isotherm with the adsorption capacities of Pb (II) and Cr (VI) metals of 0.2278 mg/g and 0.9999 mg/g, respectively, and obtained adsorption energies of 26.77 kJ/mol and 26.43 kJ/mol. In conclusion, salak peel waste has great potential as active charcoal in reducing Pb (II) and Cr (VI) metals. Keywords: adsorption, Pb (II) and Cr (VI) metals, salacca peels, activated charcoal, adsorption isotherm

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Section: Pendahuluanunclassified

Untitled

Prabawati,

Aji,

Rahmadhani

2024

JCHEM

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“…The absorption capacity (q e ) and the absorption efficiency of Pb (R) are determined using Eqs. (1) and (2) [21]:…”

Section: Calculationmentioning

confidence: 99%

“…The high biosorption capacity values were obtained without prior processing and treatment. Whereas other biomass which has a high absorption capacity value requires activation treatment either in the form of addition of HNO 3 , CaCl 2 , or citric acid [3,21,27,33]. The treatment consequently needs extra time and process costs.…”

Section: Biosorption Kineticsmentioning

confidence: 99%

Determination of Optimum Condition of Lead (Pb) Biosorption Using Dried Biomass Microalgae Aphanothece sp.

Keryanti

Mulyono

2020

Period. Polytech. Chem. Eng.

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Contamination of lead (Pb) in water due to domestic and industrial activities can endanger the environment and human health. One of the heavy metal waste treatments is adsorption using microorganisms (biosorption). In this study, dried microalgae Aphanothece sp. used as biosorbent for binding Pb in aqueous solution. Biosorbent was prepared from the 14 days cultivation of microalgae in a photobioreactor system which was then dried and mashed to the size of 45 mesh. Pb metal biosorption experiments were carried out in a batch system at various initial concentration variations (3.9–18.6 mg/L) and contact times (30–180 minutes) to find the optimum conditions of the biosorption process. The concentration of Pb in solution was analysed using the Atomic Absorption Spectroscopy (AAS). The results of the experiment showed that the highest removal efficiency of Pb metal in the initial concentration variation of 18.6 mg/L and contact time of 30 minutes was 99.9 % with an absorption capacity of 185.64 mg/g. Pb metal adsorption data at equilibrium conditions follows the Langmuir isotherm model equation with R2>0.9. Biosorption kinetics using dried biomass of Aphanothece sp. following the pseudo second-order kinetics model. The results of this study provide an overview of the potential microalgae as Pb metal biosorbent in wastewater treatment on a larger scale.

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“…Biosorben dari tumbuhan contohnya adalah kulit batang sagu dan sekam padi (Safa and Bhatti, 2011;Fauzia et al, 2018), sedangkan biosorben dari hewan contohnya adalah cangkang langkitang (Pratiwi, Zein and Aziz, 2016;Barus, Zein and Syukri, 2017). Biosorben yang sudah diteliti diantaranya biosorben kulit salak (Zein et al, 2018), arang aktif dari kulit kakao (Yetri et al, 2017), kulit sagu (Fauzia et al, 2018), kerang dan cangkang langkitang (Barus, Zein and Syukri, 2017) serta sekam padi dan abunya (Safa and Bhatti, 2011;Iqbal et al, 2018).…”

Section: Pendahuluanunclassified