Details

Autor(en) / Beteiligte

• Chetia, Rupkamal
• Devi, Shrutipriya
• Bordoloi, Shreemoyee
• Pokhrel, Binod
• Shukla, Nishant
• Gogoi, Ankur
• Konwer, Surajit

Titel

One-Step Synthesis of Polythiophene as a Potential Adsorbent for Removal of As (III) and As (V) from Aqueous Solution

Ist Teil von

• Water, air, and soil pollution, 2023-06, Vol.234 (6), p.369, Article 369

Ort / Verlag

Cham: Springer International Publishing

Erscheinungsjahr

2023

Quelle

springer (창간호~2014)

Beschreibungen/Notizen

• The present study deals with the adsorption of both As (V) and As (III) from aqueous solution using pristine polythiophene (PTh). Here PTh was prepared by chemical oxidative polymerization method using FeCl 3 as an initiator and characterized by FTIR, XRD, and SEM-EDX. Batch experiments were conducted to assess the effects of several experimental parameters such as pH, initial As concentration, and adsorbent dose on the removal of Arsenic ( As ). At low initial As concentration (100 μg/L) with pH range 3, 5, and 7, the prepared PTh showed 100% removal efficiency for both As (III) and As (V). The adsorption process followed a pseudo-second-order kinetic model with linear regression coefficients ( R 2 ) of 0.9976 and 0.9972 for the adsorption of As (III) and As (V) respectively. The Langmuir adsorption isotherm model fits well with As adsorption by PTh, demonstrating monolayer adsorption on the polymer. According to Langmuir’s adsorption isotherm model calculations, PTh showed maximum adsorption capacities of 84.33 and 87.78 μg/g for As (III) and As (V) , respectively. Feasible and spontaneous adsorption of As by PTh is indicated by the negative Gibbs free energy (Δ G °). To validate the As adsorption by PTh, DFT simulations were performed and found that the S of the polymer and O of the As species are responsible for the adsorption of As by PTh. Additionally, it can be shown that there is a Van-der-Waal type of interaction between hydrogen and oxygen molecules. Graphical Abstract Schematic diagram for the synthesis of PTh and adsorptive removal of arsenic from contaminated water.