Removal of mercury ions from aqueous by functionalized LUS-1 with Bis [3-(triethoxysilyl) propyl] tetrasulfide as an effective nanocomposite using response surface methodology (RSM)

In this study, LUS-1, as a mesoporous silica material, was functionalized using sulfur-containing ligand (Bis [3-(triethoxysilyl) propyl] tetrasulfide, TESPT) and used for mercury removal from the aqueous solution. Different characterizations such as N 2 adsorption-desorption (BET), TGA, XRD, FT-IR,...

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Published in:Environmental science and pollution research international 2023-06, Vol.30 (28), p.71649-71664
Main Authors: Azadegan, Farhang, Esmaeili Bidhendi, Mehdi, Badiei, Alireza, Lu, Shuguang, Sotoudehnia Korrani, Zahra, Rezania, Shahabaldin
Format: Article
Language:English
Subjects:
Adsorbents
Adsorption
Aquatic Pollution
Aqueous solutions
Atmospheric Protection/Air Quality Control/Air Pollution
Circular Economy for Global Water Security
Earth and Environmental Science
Ecotoxicology
Efficiency
Environment
Environmental Chemistry
Environmental Health
Environmental science
Mercury
Mercury (metal)
Nanocomposites
Response surface methodology
Silica
Sorbents
Sulfur
Surface chemistry
Waste Water Technology
Water Management
Water Pollution Control
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Summary:In this study, LUS-1, as a mesoporous silica material, was functionalized using sulfur-containing ligand (Bis [3-(triethoxysilyl) propyl] tetrasulfide, TESPT) and used for mercury removal from the aqueous solution. Different characterizations such as N 2 adsorption-desorption (BET), TGA, XRD, FT-IR, and SEM were used to verify the nanocomposite synthesis. In addition, the effects of several independent parameters like pH, the contact time of reaction, and adsorbent dose on the removal efficiency of mercury from aqueous in a batch system were studied using response surface methodology (RSM). Based on the results and after both theoretical and experimental studies, the optimum conditions using the LUS-1-TESPT were contact time of reaction of 23.16 min, sorbent dose of 51.12 mg, and pH of 4.5. The kinetic and isotherm models for the adsorption process showed a maximum adsorption capacity of adsorbent which was 136.73 mg g − 1 with 99% removal of Hg(II) via the Langmuir model. Meanwhile, the sorbent’s reusability and efficiency verified that the sorbent could be used five times after recovery with 99% efficiency.
ISSN:1614-7499
0944-1344
1614-7499
DOI:10.1007/s11356-021-15021-y