Sorption studies of toxic cations on ginger root adsorbent

Shooto, Ntaote David; Naidoo, Eliazer Bobby; Maubane, Manoko S.

doi:10.1016/j.jiec.2019.02.027

Cited by 36 publications

(22 citation statements)

References 33 publications

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“…In all the graphs, a mass change of about 5%–10% occurred closer to 100°C, characteristically attributable to loss of moisture or adsorbed water (Ogata, Nagai, Itami, Nakamura, & Kawasaki, 2020). The major mass change in all materials seems to have occurred from 180–360°C, and this was ascribed to volatilization of phenolic constituencies, hemicellulose, and cellulose structure (Ogata et al, 2020; Pakade, Ntuli, et al, 2017; Rangabhashiyam & Selvaraju, 2015; Shooto et al, 2019). From 350°C onwards, the curves show a slow decomposition attributable to degradation of lignin and conversion of ash to char (Pakade, Ntuli, et al, 2017; Shooto et al, 2019).…”

Section: Resultsmentioning

confidence: 99%

“…The major mass change in all materials seems to have occurred from 180–360°C, and this was ascribed to volatilization of phenolic constituencies, hemicellulose, and cellulose structure (Ogata et al, 2020; Pakade, Ntuli, et al, 2017; Rangabhashiyam & Selvaraju, 2015; Shooto et al, 2019). From 350°C onwards, the curves show a slow decomposition attributable to degradation of lignin and conversion of ash to char (Pakade, Ntuli, et al, 2017; Shooto et al, 2019). The base‐ and the Fenton's reagent‐treated adsorbents exhibited a residual height of >30% corroborated by the presence of metal ions and residual char.…”

Section: Resultsmentioning

confidence: 99%

“…Physico‐chemical water treatment methods such as flocculation, precipitation, membrane filtration, coagulation, ion‐exchange, and adsorption techniques have been extensively used for the removal of toxic metals and organic pollutants from wastewater (Akram, Bhatti, Iqbal, Noreen, & Sadaf, 2017; Alaqarbeh, Shammout, & Awwad, 2020; Alasadi et al, 2019; Benabdallah, Harrach, Mir, de la Guardia, & Benhachem, 2017; Nag et al, 2017; Zhang, Li, Li, Yang, & Liu, 2019). With the exception of adsorption, the other methods are associated with high energy consumption, low selectivity, high costs, excess volumes of chemicals required and toxic secondary sludge generation (Akram et al, 2017; Kahu et al, 2016; Lesaoana, Pakade, et al, 2019; Rangabhashiyam & Selvaraju, 2015; Shooto, Naidoo, & Maubane, 2019; Zhang et al, 2019). The cost‐effectiveness of adsorption method is derived from the application of freely available biosorbents which could be regenerated for a couple of times.…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, adsorption employing agro‐waste materials has proven to be a viable method for trace metals removal from aqueous solutions owing to their abundance, eco‐friendliness (require minimum processing), and easy desorption (Akram et al, 2017; Albadarin, Glocheux, Ahmad, Walker, & Mangwandi, 2014; Hossain et al, 2014; Maremeni, Modise, Mtunzi, Klink, & Pakade, 2018; Rangabhashiyam & Selvaraju, 2015; Ullah, Nadeem, Iqbal, & Manzoor, 2013; Zhang et al, 2019). Recent examples include the removal of Cu(II), Pb(II), and Ni(II) ions by ginger roots (Shooto et al, 2019), Cd, Zn, Ni, Cu, Cr, Co, Mn, and Fe by the red alga Corallina elongata (Benabdallah et al, 2017), Cr(VI) by Acacia auriculiformis biomass (Shahnaz et al, 2020), Pb(II), Zn(II), and Cd(II) by cabbage waste (Hossain et al, 2014), Cr(VI) using Artocarpus heterophyllus peel (Saranya, Ajmani, Sivasubramanian, & Selvaraju, 2018), Cr(VI) by date pits (Albadarin et al, 2014), Cr(VI) by mango kernel‐biocomposite (Akram et al, 2017), and Cr(VI) by marine macroalga Pelvetia canaliculata (Hackbarth, Maass, de Souza, Vilar, & Souza, 2016).…”

Section: Introductionmentioning

confidence: 99%

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A comparative study of acid‐treated, base‐treated, and Fenton‐like reagent‐treated biomass for Cr(VI) sequestration from aqueous solutions

Nchoe

Ntuli

Klink

et al. 2020

Water Environment Research

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A wide variety of biomass materials have been used for the removal of toxic chromium(VI) by biosorption. The current study investigated the efficacy of Macadamia nutshells treated with sodium hydroxide, nitric acid, and the Fenton‐like reagent in the removal of Cr(VI). The adsorbents were characterized by FTIR, SEM, TGA, and elemental analysis. Effects of functional parameters influencing the adsorption of Cr(VI), solution pH (pH 1–11), contact time (5–250 min), concentration of adsorbent (1–10 g/L), and adsorbate concentration (10–200 mg/L) were investigated. The optimum conditions for biosorption were pH 1.4, adsorbent dose of 5 g/L, and 160 min of contact time. In all cases, the base‐treated adsorbent displayed superior performance compared to others, with highest percent removal of 98%. The adsorbate–adsorbent interactions were better explained by the Freundlich isotherm and the pseudo‐first‐order rate model. The Macadamia‐based adsorbents are potentially useful for Cr(VI) removal from aqueous solutions. Practitioner points Three different chemical activators were investigated for the modification of Macadamia surface. The base‐treated material exhibited the highest specific surface area of 12.1 m2/g. The Cr(VI) adsorption performance for the base‐treated material dwarfed the other materials. Excellent Cr(VI) removal efficiency in the presence of competitors was achieved.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A comparative study of acid‐treated, base‐treated, and Fenton‐like reagent‐treated biomass for Cr(VI) sequestration from aqueous solutions

Nchoe

Ntuli

Klink

et al. 2020

Water Environment Research

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“…It can be also concluded that there was a low affinity between the adsorbent and the adsorbate. SINGH et al, 2018;SHOOTO et al, 2019).…”

Section: Palavras-chavementioning

confidence: 99%

Seriam as Forças Fundamentais a Origem Da Bioquiralidade Molecular?

Santos¹,

Muniz²,

Oliveira³

2020

Ciências Tecnológicas, Exatas E Da Terra E Seu Alto Grau De Aplicabilidade 2

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Todo o conteúdo deste livro está licenciado sob uma Licença de Atribuição Creative Commons. Atribuição 4.0 Internacional (CC BY 4.0). O conteúdo dos artigos e seus dados em sua forma, correção e confiabilidade são de responsabilidade exclusiva dos autores. Permitido o download da obra e o compartilhamento desde que sejam atribuídos créditos aos autores, mas sem a possibilidade de alterá-la de nenhuma forma ou utilizá-la para fins comerciais.

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