Adsorption of Mercury(II) Ion in Aqueous Solution by Using Bentonite-Based Monolith

The removal of mercury from the waterbody remains a severe challenge in ensuring environmental safety due to its highly toxic and non-biodegradable properties. Adsorption is an evidently effective method for heavy metal removal in water. This research aims to study the mercury (II) ion adsorption behavior in aqueous solution onto extruded natural bentonite in monolithic structure, bentonite-based monolith (BBM) adsorbent. BBM was characterized by XRD, BET, and SEM, the results verify BBM could improve adsorption performance assumed on its structure. Adsorption efficiency, isotherm model, and adsorption kinetic were investigated. Experiments were performed in a lab-scale batch reactor with mercury solution concentration varied from 1 to 5 mg/L. The maximum adsorption efficiency discovered to be 63,9%. The experimental data fitted well to Langmuir isotherm (non-linear) and kinetic model pseudo first order (non-linear), revealing the maximum monolayer capacity (Qo) of BBM to be 0,187 mg/g with Langmuir constants KL and aL are 0,215 L/g dan 1,151 L/mg respectively. These value confirms that BBM adsorbent encompasses tremendous potential for mercury (II) ion removal in a solution.

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Heavy Metal Removal by Oil Palm Empty Fruit Bunches (OPEFB) Biosorbent

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.625.889 ◽

2014 ◽

Vol 625 ◽

pp. 889-892 ◽

Cited By ~ 3

Author(s):

Safoura Daneshfozoun ◽

Bawadi Abdullah ◽

Mohd Azmuddin Abdullah

Keyword(s):

Heavy Metal ◽

Metal Ions ◽

Metal Removal ◽

Low Cost ◽

Ph Dependence ◽

Heavy Metal Removal ◽

Absorption Spectrometry ◽

Adsorption Efficiency ◽

Empty Fruit Bunches ◽

Initial Ph

This study developed an effective and economical physical pretreatment of OPEFB to be used as biosorbent for the removal of heavy metal ions such as Cu+2, Zn+2and Pb2+. The effects of fibres sizes, metal ions concentration (100-1000 ppm), initial pH (4-10) and contact time (20-150 min) were investigated in batch system. Samples were characterized with Atomic Absorption Spectrometry (AAS), Transmission Electron Microscopy (TEM) and Fourier Transmission Infra-red Spectroscopy (FTIR). Results showed pH-dependence adsorption efficiency and increased adsorption with initial metal concentrations where more than 92% adsorption efficiency achieved. We have successfully developed an eco-friendly, low cost adsorbent without any chemical modification or excessive energy disposal.

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Adsorption of Iron (II) Ion by Using Magnetite-Bentonite-Based Monolith from Water

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.892.10 ◽

2021 ◽

Vol 892 ◽

pp. 10-16

Author(s):

Ismi Nurul ◽

Syamsuddin Yanna ◽

Adisalamun ◽

Aulia Sugianto Veneza ◽

Darmadi

Keyword(s):

Magnetic Properties ◽

Magnetic Particles ◽

Solution Concentration ◽

Iron Solution ◽

Monolayer Adsorption ◽

Coprecipitation Process ◽

Non Linear ◽

Magnetic Loading ◽

Langmuir Constants

In this study, iron removal was carried out by the adsorption process as a well-known method of removing heavy metal. Natural bentonite with magnetic properties in a monolithic form or Magnetite-Bentonite-based Monolith (MBM) adsorbent was used as an adsorbent to remove Iron (II) ion from the aqueous solution. The magnetic properties of adsorbents are obtained by adding magnetite (Fe3O4), which is synthesized by the coprecipitation process. The characterization of magnetic properties was performed using the Vibrating Sample Magnetometer (VSM). VSM results showed that the magnetic particles were ferromagnetic. Adsorption efficiency, isotherm model, and adsorption kinetics were investigated in a batch system with iron solution concentration varied from 2 to 10 mg/L and magnetite loading at 2% and 5% w/w. The highest removal efficiency obtained reached 89% with a 5% magnetite loading. The best fit to the data was obtained with the Langmuir isotherm (non-linear) with maximum monolayer adsorption capacity (Qo) at 5% magnetic loading MBM adsorbent is 0.203 mg/g with Langmuir constants KL and aL are 2.055 L/g and 10.122 L/mg respectively. The pseudo-first-order (non-linear) kinetic model provides the best correlation of the experimental data with the rate of adsorption (k1) with magnetite loading 2% and 5%, respectively are 0.024 min-1 and 0.022 min-1.

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Evaluation of barrier materials for removing pollutants from groundwater rich in natural organic matter

Water Science & Technology ◽

10.2166/wst.2014.192 ◽

2014 ◽

Vol 70 (1) ◽

pp. 32-39 ◽

Cited By ~ 7

Author(s):

I. Kozyatnyk ◽

P. Haglund ◽

L. Lövgren ◽

M. Tysklind ◽

A. Gustafsson ◽

...

Keyword(s):

Organic Matter ◽

Fly Ash ◽

Natural Organic Matter ◽

Metal Removal ◽

Heavy Metal Removal ◽

Environmental Safety ◽

Polluted Water ◽

Contaminant Removal ◽

Barrier Materials ◽

Optimal Material

Permeable barriers are used for passive remediation of groundwater and can be constructed from a range of materials. The optimal material depends on the types of contaminants and physico-chemical parameters present at the site, as well as the hydraulic conductivity, environmental safety, availability, cost and long-term stability of the material itself. The aim of the presented study was to test a number of materials for their ability to remove heavy metals and organic pollutants from groundwater with a high (140 mg L−1) content of natural organic matter (NOM). The following materials were included in the study: sand, peat, fly ash, iron powder, lignin and combinations thereof. Polluted water was fed into glass columns loaded with each sorbent and the contaminant removal efficiency of the material was evaluated through chemical analysis of the percolate. Materials based on fly ash and zero-valent iron were found to be the most effective for heavy metal removal, while fly ash and peat were the most effective for removing aliphatic compounds. Filtration through lignin and peat led to leaching of NOM. Although the leaching decreased over time, it remained high throughout the experiments. The results indicate that remediation of contaminated land at disused industrial sites is a complex task that often requires the use of mixed materials or a minimum of two sequential barriers.

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Synthesis, Characterization, and Applications of Silk/Bentonite Clay Composite for Heavy Metal Removal From Aqueous Solution

Frontiers in Chemistry ◽

10.3389/fchem.2019.00654 ◽

2019 ◽

Vol 7 ◽

Cited By ~ 7

Author(s):

Nasira Wahab ◽

Muhammad Saeed ◽

Muhammad Ibrahim ◽

Akhtar Munir ◽

Muhammad Saleem ◽

...

Keyword(s):

Aqueous Solution ◽

Heavy Metal ◽

Metal Removal ◽

Heavy Metal Removal ◽

Bentonite Clay

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Heavy-metal removal from aqueous solution by fungus Mucor rouxii

Water Research ◽

10.1016/s0043-1354(03)00409-3 ◽

2003 ◽

Vol 37 (18) ◽

pp. 4486-4496 ◽

Cited By ~ 363

Author(s):

Guangyu Yan ◽

Thiruvenkatachari Viraraghavan

Keyword(s):

Aqueous Solution ◽

Heavy Metal ◽

Metal Removal ◽

Heavy Metal Removal ◽

Mucor Rouxii

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Efficient heavy metal ion removal by triazinyl-β-cyclodextrin functionalized iron nanoparticles

RSC Advances ◽

10.1039/c5ra15134a ◽

2015 ◽

Vol 5 (110) ◽

pp. 90602-90608 ◽

Cited By ~ 15

Author(s):

Amir Abdolmaleki ◽

Shadpour Mallakpour ◽

Sedigheh Borandeh

Keyword(s):

Heavy Metal ◽

Aqueous Solutions ◽

Metal Ion ◽

Iron Nanoparticles ◽

Metal Removal ◽

Heavy Metal Removal ◽

Metal Ion Removal ◽

Ion Removal ◽

Heavy Metal Ion Removal ◽

Nano Adsorbent

A novel magnetic nano-adsorbent containing Fe3O4 nanoparticles functionalized with MCT-β-CD was fabricated and exhibited a remarkable enhancement in heavy metal removal efficiency from aqueous solutions.

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