Conducting Polymer Based Nanoadsorbents for Removal of Heavy Metal Ions/Dyes from Wastewater

Kour, Gagandeep; Kothari, Richa; Azam, Rifat; Majhi, Pradeep Kumar; Dhar, Sunil; Pathania, Deepak; Tyagi, V.V.

doi:10.1007/978-3-030-62090-5_7

Cited by 6 publications

(3 citation statements)

References 58 publications

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“…Polyaniline and reduced graphene oxide selected in this study. Polyaniline selected due to ease of synthesis, tunable structure, and the presence of ideal functional groups (amine and imine group, -NH2-fragments), and high surface area (Kour 2021). It has been used as an adsorbent material towards heavy metals like chromium (Cr(III) and Cr(VI)), mercury (Hg), lead (Pb) and cadmium (Cd), copper (Cu) and arsenic (As) (Mahmud et al 2017) because it can form a chelate with metal cations as well as absorb anionic metal species via electrostatic interaction or through hydrogen bonding (Kanwal et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Polyaniline/Reduced Graphene Oxide Doping Induced Abundant Active Sites in Enset Fiber as an Efficient Adsorbent Material for Wastewater Treatment

Lera

2024

Preprint

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Analysis of physicochemical properties and treatment of water is vital to the environment and living standard of society. In this study, polyaniline (PANI)/enset fiber (EF), reduced graphene oxide/EF, and PANI/rGO/EF composites as adsorbent material s were prepared via facile in situ chemical oxidative polymerization techniques. The as-synthesized materials were characterized using XRD, FTIR, UV-VIS, TGA, and FTIR spectroscopy. The physical characterization reveals the deposition of PANI and rGO on the surface of the EF confirmed by cloudy and wrinkled fibrous morphology from SEM image. After physical characterization, the adsorption performance of the proposed materials was tested using the batch method. A result shows maximum adsorption capacity (qmax) of Cu2+ and Pb2+ ions by PANI/rGO coated EF (EF) was 10.11 mg/g and 13.4 mg/g, respectively which is higher than pristine EF, PANI/EF, and rGO/EF. When all parameters were optimized, adsorptive removal efficiency of PANI/rGO/EF composite material towards Pb2+ and Cu2+ ions was 99% and 97.77%, respectively. The Freundlich isotherm data for Cu2+ and Pb2+ have a good fit with the experimental data (R2 = 0.99 and 0.98), and Langmuir isotherm data for Cu2+ and Pb2+ (RL = 0.18 & 0.19), respectively. The pseudo-second-order kinetic isothermal was more fit with physiosorption at R2 = 0.99 for Cu2+ and R2 = 1 for Pb2+. Therefore, a synthesized novel material PANI/rGO/EF shows a remarkable adsorption performance compared with EF, PANI/EF, and rGO/EF due to doping-induced abundant active sites of composite material makes it a promising candidate for wastewater treatment techniques.

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Section: Introductionmentioning

confidence: 99%

Polyaniline/Reduced Graphene Oxide Doping Induced Abundant Active Sites in Enset Fiber as an Efficient Adsorbent Material for Wastewater Treatment

Lera

2024

Preprint

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“…For example, bentonite layers intercalation with polyaniline polymeric chains led to developing a product with increased surface area, high conduction, mechanical stability, and elevated adsorption capacity 49 , 50 . Furthermore, several reports have indicated the bentonite’s beneficial physicochemical features induced to the nanoadsorbent structure by integrating bentonite and many metal oxides or metal-based structures 51 , 52 .…”

Section: Introductionmentioning

confidence: 99%

Enhancement of adsorption efficiency of crystal violet and chlorpyrifos onto pectin hydrogel@Fe3O4-bentonite as a versatile nanoadsorbent

Beigi

Ganjali

Hassanzadeh‐Afruzi

et al. 2023

Sci Rep

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The magnetic mesoporous hydrogel-based nanoadsornet was prepared by adding the ex situ prepared Fe3O4 magnetic nanoparticles (MNPs) and bentonite clay into the three-dimentional (3D) cross-linked pectin hydrogel substrate for the adsorption of organophosphorus chlorpyrifos (CPF) pesticide and crystal violet (CV) organic dye. Different analytical methods were utilized to confirm the structural features. Based on the obtained data, the zeta potential of the nanoadsorbent in deionized water with a pH of 7 was − 34.1 mV, and the surface area was measured to be 68.90 m2/g. The prepared hydrogel nanoadsorbent novelty owes to possessing a reactive functional group containing a heteroatom, a porous and cross-linked structure that aids convenient contaminants molecules diffusion and interactions between the nanoadsorbent and contaminants, viz., CPF and CV. The main driving forces in the adsorption by the Pectin hydrogel@Fe3O4-bentonite adsorbent are electrostatic and hydrogen-bond interactions, which resulted in a great adsorption capacity. To determine optimum adsorption conditions, effective factors on the adsorption capacity of the CV and CPF, including solution pH, adsorbent dosage, contact time, and initial concentration of pollutants, have been experimentally investigated. Thus, in optimum conditions, i.e., contact time (20 and 15 min), pH 7 and 8, adsorbent dosage (0.005 g), initial concentration (50 mg/L), T (298 K) for CPF and CV, respectively, the CPF and CV adsorption capacity were 833.333 mg/g and 909.091 mg/g. The prepared pectin hydrogel@Fe3O4-bentonite magnetic nanoadsorbent presented high porosity, enhanced surface area, and numerous reactive sites and was prepared using inexpensive and available materials. Moreover, the Freundlich isotherm has described the adsorption procedure, and the pseudo-second-order model explained the adsorption kinetics. The prepared novel nanoadsorbent was magnetically isolated and reused for three successive adsorption–desorption runs without a specific reduction in the adsorption efficiency. Therefore, the pectin hydrogel@Fe3O4-bentonite magnetic nanoadsorbent is a promising adsorption system for eliminating organophosphorus pesticides and organic dyes due to its remarkable adsorption capacity amounts.

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“…There are a range of polymers that are used to prepare membranes for wastewater treatment purposes [7][8][9]. Polysulfone has several significant mechanical and thermal characteristics that make it attractive to membrane scientists [10,11].…”

Section: Introductionmentioning

confidence: 99%

Removal of Heavy Metals from Wastewater Using Novel Polydopamine-Modified CNTs-Based Composite Membranes

et al. 2021

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The presence of major heavy metals including Pb2+, Cu2+, Co2+, Ni2+, Hg2+, Cr6+, Cd2+, and Zn2+ in water is of great concern because they cannot degrade or be destroyed. They are toxic even at very low concentrations. Therefore, it is necessary to remove such toxicants from water. In the current study, polydopamine carbon nanotubes (PD-CNTs) and polysulfone (PS) composite membranes were prepared. The structural and morphological features of the prepared PDCN composite membranes were studied using FTIR, XRD, SEM, and EDS. The potential application of PDCNs for heavy metal removal was studied for the removal of Pb2+, Cr6+, and Cd2+ from wastewater. The maximum removal efficiency of 96.1% was obtained for Cr6+ at 2.6 pH using a composite membrane containing 1.0% PD-CNTs. The removal efficiencies decreased by 64.1 and 73.4, respectively, by enhancing the pressure from 0.50 up to 0.85 MPa. Under the same circumstances, the percentages of Pb+2 removal at 0.49 bar by the PDCNS membranes containing 0.5% and 1.0% PD-CNT were 70 and 90.3, respectively, and decreased to 54.3 and 57.0, respectively, upon increasing the pressure to 0.85 MPa. The results showed that PDCNS membranes have immense potential for the removal of heavy metals from water.

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Conducting Polymer Based Nanoadsorbents for Removal of Heavy Metal Ions/Dyes from Wastewater

Cited by 6 publications

References 58 publications

Polyaniline/Reduced Graphene Oxide Doping Induced Abundant Active Sites in Enset Fiber as an Efficient Adsorbent Material for Wastewater Treatment

Polyaniline/Reduced Graphene Oxide Doping Induced Abundant Active Sites in Enset Fiber as an Efficient Adsorbent Material for Wastewater Treatment

Enhancement of adsorption efficiency of crystal violet and chlorpyrifos onto pectin hydrogel@Fe3O4-bentonite as a versatile nanoadsorbent

Removal of Heavy Metals from Wastewater Using Novel Polydopamine-Modified CNTs-Based Composite Membranes

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