Effective removal of bisphenol A (BPA) from water using a goethite/activated carbon composite

Koduru, Janardhan Reddy; Lingamdinne, Lakshmi Prasanna; Singh, Jiwan; Choo, Kwang‐Ho

doi:10.1016/j.psep.2016.06.038

Cited by 80 publications

(26 citation statements)

References 44 publications

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“…Previous research into the adsorption of natural organic matter anions and cations by activated carbon has shown that the internal sub-50 nm biochar pores could contain both organic compounds as well as dissolved oxygen and CO 2 , cations, anions and colloids (Shao et al, 2014;Velten et al, 2011). Research on mineral/activated carbon (especially those impregnated with Fe/O) composites have shown increased adsorption of natural organic compounds and anions (Koduru et al, 2016). A complex series of reactions can take place in these pores, which could result in the formation of porous organomineral layers, altering pore distribution profiles.…”

Section: Discussionmentioning

confidence: 99%

Microstructural and associated chemical changes during the composting of a high temperature biochar: Mechanisms for nitrate, phosphate and other nutrient retention and release

Long

Kammann

Shepherd

et al. 2018

Science of The Total Environment

179

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Recent studies have demonstrated the importance of the nutrient status of biochar and soils prior to its inclusion in particular agricultural systems. Pre-treatment of nutrient-reactive biochar, where nutrients are loaded into pores and onto surfaces, gives improved yield outcomes compared to untreated biochar. In this study we have used a wide selection of spectroscopic and microscopic techniques to investigate the mechanisms of nutrient retention in a high temperature wood biochar, which had negative effects on Chenopodium quinoa above ground biomass yield when applied to the system without prior nutrient loading, but positive effects when applied after composting. We have compared non-composted biochar (BC) with composted biochar (BCC) to elucidate the differences which may have led to these results. The results of our investigation provide evidence for a complex series of reactions during composting, where dissolved nutrients are first taken up into biochar pores along a concentration gradient and through capillary action, followed by surface sorption and retention processes which block biochar pores and result in deposition of a nutrient-rich organomineral (plaque) layer. The lack of such pretreatment in the BC samples would render it reactive towards nutrients in a soil-fertilizer system, making it a competitor for, rather than provider of, nutrients for plant growth.

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Section: Discussionmentioning

confidence: 99%

Microstructural and associated chemical changes during the composting of a high temperature biochar: Mechanisms for nitrate, phosphate and other nutrient retention and release

Long

Kammann

Shepherd

et al. 2018

Science of The Total Environment

179

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“…Thus, two -OH groups in HQ helps to increase the HQ adsorption affinity to the Fe-GAC surfaces [47,62]. Adsorption of HQ on Fe-GAC was due to the electro-chemical interaction between the HQ and the Fe oxides as well as by the active functional groups such as the carboxylic and hydroxide groups present on Fe-GAC [61,63,64]. generated by oxidation-reduction reactions of various iron valences (Fe(III)/Fe(II)) present on the Fe-GAC catalyst in presence of hydrogen peroxide.…”

Section: Mechanisms Of Hq Adsorption and Catalytic Oxidationmentioning

confidence: 99%

Removal of toxic hydroquinone: Comparative studies on use of iron impregnated granular activated carbon as an adsorbent and catalyst

Tyagi

Das

Srivastava

2018

Environmental Engineering Research

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In this study, iron (Fe) impregnated granular activated carbon (Fe-GAC) has been synthesized and characterized for various properties. Comparative studies have been performed for use of Fe-GAC as an adsorbent as well as a catalyst during catalytic oxidation of hydroquinone (HQ). In the batch adsorption study, effect of process parameter like initial HQ concentration (Co = 25-1,000 mg/L), pH (2-10), contact time (t: 0-24 h), temperature (T: 15-45°C) and adsorbent dose (w: 5-50 g/L) have been studied. Maximum HQ adsorption efficiency of 75% was obtained at optimum parametric condition of: pH = 4, w = 40 g/L and t = 14 h. Pseudo-second order model best-fitted the HQ adsorption kinetics whereas Langmuir model best-represented the isothermal equilibrium behavior. During oxidation studies, effect of various process parameters like initial HQ concentration (Co: 20-100 mg/L), pH (4-8), oxidant dose (CH2O2: 0.4-1.6 mL/L) and catalyst dose (m: 0.5-1.5 g/L) have been optimized using Taguchi experimental design matrix. Maximum HQ removal efficiency of 83.56% was obtained at optimum condition of Co = 100 mg/L, pH = 6, CH2O2 = 0.4 mL/L, and m = 1 g/L. Overall use of Fe-GAC during catalytic oxidation seems to be a better as compared to its use an adsorbent for treatment of HQ bearing wastewater.

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“…22 However, functionalizing iron-oxide nanoparticles with parent biosorbent, improving adsorption capacity, selectivity and stability levels of tested materials. 23 So, these functionalized activated carbons with iron oxide are great interest for removing pollutants from water. Moreover, the modification of biogenic activated carbon with iron oxide that can enhances its adsorption ability and selectivity of parent material.…”

Section: Introductionmentioning

confidence: 99%

Adsorptive Removal of Fluoride from Aqueous Solution by Biogenic Iron Permeated Activated Carbon Derived from Sweet Lime Waste

Ibrahim

Siddique

Verma

et al. 2019

ACSi

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In this study, biogenic activated carbon were successfully synthesized from Citrus limetta pulp residue, and applied to remove fluoride from an aqueous solution. For the synthesis activated carbon of biosorbents, raw materials were heated in muffle furnace at two different temperatures i.e. (250 °C and 500 °C) and were noted as ACP-250 and ACP-500. The prepared biosorbents were characterized through scanning electron microscopy (SEM), Fourier transform infrared (FTIR), and X-ray diffraction (XRD). Batch adsorption studies were performed with varying temperature, dosage, pH, and various initial concentrations. Adsorption isotherms and the reaction kinetics were also analyzed in order to understand the adsorption mechanism. The results of this study shows that the maximum removal achieved was approximately (86 and 82) % of ACP-500 and ACP-250, respectively. The isotherm results show that the Langmuir isotherm model fitted better, with monolayer adsorption capacity of 12.6 mg/g of fluoride. However, for kinetic study, the pseudo-second-order kinetics fitted well. The synthesized materials at different temperature were highly effective for the removal of fluoride from water, with reusability of three to four times.

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Effective removal of bisphenol A (BPA) from water using a goethite/activated carbon composite

Cited by 80 publications

References 44 publications

Microstructural and associated chemical changes during the composting of a high temperature biochar: Mechanisms for nitrate, phosphate and other nutrient retention and release

Microstructural and associated chemical changes during the composting of a high temperature biochar: Mechanisms for nitrate, phosphate and other nutrient retention and release

Removal of toxic hydroquinone: Comparative studies on use of iron impregnated granular activated carbon as an adsorbent and catalyst

Adsorptive Removal of Fluoride from Aqueous Solution by Biogenic Iron Permeated Activated Carbon Derived from Sweet Lime Waste

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