Kinetic studies of graphene oxide towards the removal of rhodamine B and congo red

Sahar, Juma; Akhtar, Naeem; Farooq, Muhammad; Zareen, Shah; Farida, Farida; Sherazi, Sonia

doi:10.1080/03067319.2019.1679802

Cited by 14 publications

(6 citation statements)

References 45 publications

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“…Namun, masing-masing metode tersebut memiliki keterbatasan, seperti biaya produksi dan efisiensinya [1]. Di antara proses tersebut, adsorpsi dianggap sebagai metode yang paling andal dan efektif untuk pengolahan zat warna yang ada dalam air limbah [2]. Proses adsorpsi memiliki desain yang sederhana sehingga mudah untuk dioperasikan dengan biaya produksi yang terbilang rendah serta pemulihan bahan adsorben dan adsorbat terbilang aman, tidak memerlukan sinar UV dalam prosesnya, dan bebas dari produksi zat beracun seperti radikal bebas dan ozon yang dihasilkan selama proses fotodegradasi [3].…”

Section: Pengaruh Waktu Dan Dosis Terhadap Efektivitas Adsorpsi Rhoda...unclassified

“…GO merupakan material berbasis grafena dengan permukaan yang luas dan struktur monolayer datar. GO memiliki struktur sarang lebah yang mengandung gugus fungsi oksigen pada permukaannya seperti gugus epoksi (C-O-C), hidroksil (C-OH), karbonil (C = O) dan karboksil (-COOH) pada tepinya yang terikat secara kovalen [2]. Gugus oksigen yang dimiliki GO menyebabkan jarak antar lapisan pada GO menjadi lebih lebar.…”

Section: Pengaruh Waktu Dan Dosis Terhadap Efektivitas Adsorpsi Rhoda...unclassified

“…Perubahan tersebut dapat dinyatakan dalam besaran 𝑅 ! yang menggambarkan efisiensi adsorpsi oleh GO, yaitu perbandingan antara konsentrasi filtrat yang teradsorpsi oleh GO terhadap konsentrasi awal larutan RhB menggunakan persamaan (2).…”

Section: Pengaruh Waktu Dan Dosis Terhadap Efektivitas Adsorpsi Rhoda...unclassified

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Pengaruh Waktu Dan Dosis Terhadap Efektivitas Adsorpsi Rhodamine B Oleh Graphene Oxide

SYAKIR,

OKTAVIANI,

FITRILAWATI

2024

JME

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Pada penelitian ini dipelajari pengaruh waktu dan dosis terhadap adsorpsi Rhodamin B (RhB) dalam air oleh Graphene Oxide (GO). Eksperimen adsorpsi dilakukan dengan cara mencampurkan dispersi GO ke dalam larutan RhB dengan memvariasikan waktu pengadukan dan rasio massa RhB:GO. Filtrat yang didapatkan pada proses adsorpsi dikarakterisasi dengan menggunakan spektofotometer UV-Vis. Hasil eksperimen menunjukkan waktu pengadukan mempengaruhi jumlah adsorbat yang teradsorpsi. Semakin lama waktu pengadukan, maka semakin banyak pula adsorbat RhB yang terserap pada permukaan GO. Pada 5 menit pertama terserap sebanyak 51% dan setelah menit ke-360 terserap sebanyak 61%. Selain itu, jumlah massa GO yang digunakan mempengaruhi jumlah penghapusan RhB, semakin banyak massa GO yang digunakan maka semakin banyak pula RhB yang teradsorpsi pada permukaan GO. Untuk rasio massa RhB:GO =1:1 diperoleh jumlah RhB yang teradsorpsi oleh 0,25 mg massa GO sebesar 29%, sedangkan pada 5 mg massa GO adalah sebesar 79%

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Section: Pengaruh Waktu Dan Dosis Terhadap Efektivitas Adsorpsi Rhoda...unclassified

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Pengaruh Waktu Dan Dosis Terhadap Efektivitas Adsorpsi Rhodamine B Oleh Graphene Oxide

SYAKIR,

OKTAVIANI,

FITRILAWATI

2024

JME

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“…Graphene oxide (GO) has a considerable specific surface area (2,630 m 2 /g) (Tabish et al, 2018) and a substantial amount of hydrophilic (carboxyl, epoxy and hydroxyl) groups on the surface, which makes it possible for GO to be an excellent adsorbent. Many studies have proved that the removal of organic pollutants from aqueous solution by GO is very efficient (Sahar et al, 2019). Its huge absorption capacity of 714 mg/g on MB was observed (Yang et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Removal behavior of methylene blue from graphene oxide/gluten composite material: kinetics, isotherms and thermodynamics

Zhang

et al. 2020

IJCST

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PurposeIn order to discover a new adsorbent that can be used to purify dye wastewater in the textile and apparel industry, a novel type of graphene oxide/gluten composite material using an improved acid bath coagulation method was synthesized, which can remove methylene blue in an aqueous environment.Design/methodology/approachAfter experimentally compounding different ratios of graphene oxide and gluten, the graphene oxide/gluten composite material with 20% graphene oxide content and superlative adsorption effect was chosen. The synthesized material was characterized by different techniques such as FT-IR and SEM, indicating the microstructure of the material and the success of the composite. Various factors were considered, namely, the influence of temperature, dosage, pH and contact time. The isotherms, kinetics and thermodynamic parameters were successively discussed.FindingsThe qmax value of 214.29 mg/g of the material was higher compared to the general sorbent, thus, the graphene oxide/gluten composite material was a suitable sorbent for methylene blue removal. Overall, the graphene oxide/gluten composite material can be considered as an effectual and prospective adsorbent to remove methylene blue in the textile and apparel industrial effluent.Originality/valueGraphene oxide is a potentially excellent sorbent. However, the high dispersibility of GO is detrimental to adsorption, it disperses rapidly in an aqueous solution making separation and recovery difficult. The high load capacity and recyclability of gluten as a colloid make it a suitable carrier for fixing GO. Studies on the combination of GO and GT into composite adsorption material and for the removal of dyes from dyeing wastewater have not been reported. The composite material research on GO and GT can provide new ideas for the research of these kinds of materials and contribute to its wider and convenient application in wastewater treatment.

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“…Marnani and Shahbazi, 2019). In addition, dye concentrations as low as 1 mg/L have been linked to carcinogenic and mutagenic impacts on human and biotic health [5], [84]. The detrimental impacts of synthetic dyes on health and the environment as well as limitations in conventional treatment methods to remove these toxic contaminants are not only a major concern but also a challenge [85].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Environmental Applications of Graphene Oxide in Removal of Synthetic Dyes and Hydrogen Storage

Nekouei Marnani

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Synthetic dyes are prevalent organic contaminants in the effluents of industries such as textiles, paper, cosmetics, and pharmaceuticals, pose a significant environmental challenge due to their resistance to conventional treatment methods. The potential toxicity, carcinogenicity, and detrimental effects on both human health and the environment highlight the urgent need for development of technologies to efficiently remove synthetic dyes from water and wastewater. However, this is not the only environmental issue that demands attention. To mitigate the adverse impact of climate change, hydrogen, as a clean and sustainable renewable energy source, holds immense promise for reducing dependence on fossil fuels in the transportation sector. The development of materials with superior hydrogen adsorption capacities is pivotal for realizing the potential energy source to employ in transportation.Graphene oxide (GO) has developed interest as an adsorbent for water treatment and hydrogen storage applications, owing to its unique layered structure, high surface area, and numerous functional groups. This study first explores and evaluates the potential of GO as an effective alternative to commonly used adsorbents such as Granular activated carbon (GAC) and Zeolite NaY (NaY) for the removal of synthetic dyes. The research focuses on two synthetic dyes, Methylene Blue (MB) and Rhodamine B (RhB), varying in molecular size and structure. It assesses adsorbents' removal efficiency under slow-mixing condition to simulate large-scale conditions.Further, this research investigates the effect of surface modifications of GO and reduced GO (rGO) on surface area and hydrogen storage. To accomplish this objective, two different isotherm models Braunauer-Emmett-Teller (BET) and Density Functional Theory (DFT) as well as two different molecular size and polarity gas probe molecules, Nitrogen (N2) and Hydrogen (H2) were employed to measure the surface area of materials.

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Kinetic studies of graphene oxide towards the removal of rhodamine B and congo red

Cited by 14 publications

References 45 publications

Pengaruh Waktu Dan Dosis Terhadap Efektivitas Adsorpsi Rhodamine B Oleh Graphene Oxide

Pengaruh Waktu Dan Dosis Terhadap Efektivitas Adsorpsi Rhodamine B Oleh Graphene Oxide

Removal behavior of methylene blue from graphene oxide/gluten composite material: kinetics, isotherms and thermodynamics

Investigation of Environmental Applications of Graphene Oxide in Removal of Synthetic Dyes and Hydrogen Storage

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