Efficient removal of Cr(VI) by polyaniline modified biochar from date (Phoenix dactylifera) seed

Tripathy, Swagatika; Sahu, Sumanta; Patel, Raj Kishore; Panda, Rutuparna; Kar, Pravin Kumar

doi:10.1016/j.gsd.2021.100653

Cited by 40 publications

(8 citation statements)

References 58 publications

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“…In contrast, there are two main stages in the weight change mitigation of the thermal decomposition of nFeS-F. Initially, the water on the surface of the material starts to disappear at 110 °C due to the evaporation of the water adsorbed on the surface of nFeS-F, which involves Vander walls force of attraction within molecules 40 . The second weight loss occurred between 200 °C and 480 °C, indicating that FeS underwent oxidative pyrolysis and dissipated as the gaseous products SO 2 and SO 3 41 .…”

Section: Resultsmentioning

confidence: 99%

Study on the adsorption of Zn(II) and Cu(II) in acid mine drainage by fly ash loaded nano-FeS

Guo,

Fu,

Gao

et al. 2024

Sci Rep

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Aiming at the acid mine drainage (AMD) in zinc, copper and other heavy metals treatment difficulties, severe pollution of soil and water environment and other problems. Through the ultrasonic precipitation method, this study prepared fly ash-loaded nano-FeS composites (nFeS-F). The effects of nFeS-F dosage, pH, stirring rate, reaction time and initial concentration of the solution on the adsorption of Zn(II) and Cu(II) were investigated. The data were fitted by Lagergren first and second-order kinetic equations, Internal diffusion equation, Langmuir and Freundlich isotherm models, and combined with SEM, TEM, FTIR, TGA, and XPS assays to reveal the mechanism of nFeS-F adsorption of Zn(II) and Cu(II). The results demonstrated that: The removal of Zn(II) and Cu(II) by nFeS-F could reach 83.36% and 70.40%, respectively (The dosage was 8 g/L, pH was 4, time was 150 min, and concentration was 100 mg/L). The adsorption process, mainly chemical adsorption, conforms to the Lagergren second-order kinetic equation (R2 = 0.9952 and 0.9932). The adsorption isotherms have a higher fitting degree with the Langmuir model (R2 = 0.9964 and 0.9966), and the adsorption is a monolayer adsorption process. This study can provide a reference for treating heavy metals in acid mine drainage and resource utilization of fly ash.

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Section: Resultsmentioning

confidence: 99%

Study on the adsorption of Zn(II) and Cu(II) in acid mine drainage by fly ash loaded nano-FeS

Guo,

Fu,

Gao

et al. 2024

Sci Rep

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“…APS solution (0.912 g APS in 10 mL of water) was added dropwise to the dispersion of aniline and KOH-WHL-AC with continuous stirring for 10 h. A dark green dispersion so developed was filtered through vacuum filtration and washed with HCl and water to eliminate unreacted aniline. The resultant product was oven-dried at 70 0 C for 24 hours (Tripathy et al 2021).…”

Section: Adsorbent Preparationmentioning

confidence: 99%

Adsorption of Hexavalent Chromium on KOH Activated Carbon Derived from Water Hyacinth Leaf Coated with Polyaniline/Polypyrrole

Taye,

Mehretie,

Getachew

et al. 2024

SEJS

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KOH-Activated carbon derived from Water Hyacinth (KOH-WHL-AC) was prepared and coated with Polyaniline-Polypyrrole (PANI/PPY) copolymer for the removal of hexavalent chromium (Cr(VI)) from wastewater. The prepared material was characterized by FT-IR and XRD. The effect of pH, contact time, dosage, and initial Cr(VI) concentrations were optimized using batch adsorption experiment. The adsorption kinetics was found to fit better to pseudo-second-order than the pseudo-first order model. Langmuir and Freundlich isotherm models were analyzed using linear fitting. It was found that the Langmuir adsorption model gives the best fit indicating that the monolayer adsorption of Cr(VI) on the KOH-WHL-AC. The highest adsorption capacity of 409.83 mg/g was achieved at pH 1.0, and equilibrium was achieved within 420 min. The reuse efficiency of the synthesized material was also found to be greater than 54% for five consecutive cycles. Thermodynamic studies have also been carried out and the adsorption was found to be spontaneous and endothermic

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“…According to Deng and his team, the aminated RH had a maximum adsorption capacity of 2.49 (PFOA), 1.70 (PFBA), and 2.65 mmol/g (PFOS) at a pH of 5.0. In a related study, Tripathy and colleagues 129 examined the removal of Cr(VI) by date seed ( Phoenix dactylifera ) using polyaniline-modified biochar. The date seeds were pulverized and pyrolyzed under N 2 flow rate at 25 mL/min and a rising temperature rate of 50°C per minute to produce date seed biochar (DSC).…”

Section: Current Strategies For the Surface Modification Of Agricultu...mentioning

confidence: 99%

A review on the current approach for the sustainable production of nanocomposites from agricultural wastes and their application for the adsorption of organophosphate flame retardants

Ivbanikaro,

Okonkwo,

Sadiku

et al. 2023

Polymers and Polymer Composites

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Water pollution caused by emerging organic pollutants such as the halogenated organophosphate flame retardants, has exacerbated the issue of water scarcity. An eco-friendly technology, e.g., the adsorption technique, requires the use of affordable and safe adsorbents. Agricultural waste materials are promising adsorbents for wastewater remediation due to their relative abundance, biodegradability, non-toxic and cost-effective properties. However, most agricultural wastes are not ideal for adsorption in their raw forms and may require physical or chemical pre-treatments/modification, in order to increase the materials' compatibility and natural adsorption properties. Cellulose is an important constituent of plant residues that can be used as a precursor for the production of greener and sustainable industrial nanomaterials. Therefore, in this review, a discourse on the most recent approach/strategies for the modification of a range of agricultural wastes is presented. The result from their applications showed agricultural wastes has great prospects as adsorbents. The challenges encountered in the synthesis of plant-based adsorbents and the development of 3-D structured nanocomposites from cellulose, to circumvent these difficulties is extensively reviewed. Furthermore, the prospects in the application of cellulose beads/ZnO nanocomposites (CB-ZnO) derived from the maize tassel, for the adsorption of the halogenated organophosphate esters from aqueous matrices are presented in this review

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Efficient removal of Cr(VI) by polyaniline modified biochar from date (Phoenix dactylifera) seed

Cited by 40 publications

References 58 publications

Study on the adsorption of Zn(II) and Cu(II) in acid mine drainage by fly ash loaded nano-FeS

Study on the adsorption of Zn(II) and Cu(II) in acid mine drainage by fly ash loaded nano-FeS

Adsorption of Hexavalent Chromium on KOH Activated Carbon Derived from Water Hyacinth Leaf Coated with Polyaniline/Polypyrrole

A review on the current approach for the sustainable production of nanocomposites from agricultural wastes and their application for the adsorption of organophosphate flame retardants

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