Removal of arsenic and fluoride from aqueous solution by biomass based activated biochar: Optimization through response surface methodology

Saikia, Ruprekha; Goswami, Ritusmita; Bordoloi, Neonjyoti; Senapati, Kula Kamal; Pant, Kamal Kishore; Kumar, Manish; Kataki, Rupam

doi:10.1016/j.jece.2017.10.027

Cited by 69 publications

(18 citation statements)

References 48 publications

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“…However, most of these techniques are expensive, generates toxic sludge and requires skilled labor for operation (Sarkar and Paul, 2016). Adsorption technique appears to be the suitable method that can be applied for arsenic removal particularly in rural areas because it uses materials that are found at little or no costs such as clay minerals (Bentahar et al., 2016), activated carbon (Arcibar-Orozco et al., 2014), activated alumina, bone char (Saikia et al., 2017), macrofungus biomass (Sari and Tuzen, 2009) and coal fly ash (Wang et al., 2008).…”

Section: Introductionmentioning

confidence: 99%

Performance evaluation of surfactant modified kaolin clay in As(III) and As(V) adsorption from groundwater: adsorption kinetics, isotherms and thermodynamics

Mudzielwana¹,

Gitari²,

Ndungu

2019

Heliyon

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In this paper surfactant modified kaolin clay for As(III) and As(V) was prepared by intercalating hexadecyltrimethylamonium bromide (HDTMA-Br) cationic surfactant onto the clay interlayers. Batch experiments were used to evaluate the effectiveness of surfactant modified kaolin clay towards As(III) and As(V) removal. The results revealed that adsorption of As(III) and As(V) is optimum at pH range 4–8. The maximum As(III) and As(V) adsorption capacities were found 2.33 and 2.88 mg/g, respectively after 60 min contact time. The data for adsorption of As(III) showed a better fit too pseudo first order model of reaction kinetics while the data for As(V) fitted better to pseudo second order model. The adsorption isotherm data for As(III) and As(V) fitted well to Langmuir model indicating that adsorption of both species occurred on a mono-layered surface. Adsorption thermodynamics model revealed that adsorption of As(III) and As(V) was spontaneous and exothermic. The presence of Mg2+ and Ca2+ increased As(III) and As(V) adsorption efficiency. The regeneration study showed that synthesized adsorbent can be used for up to 5 times with maximum As(III) and As(V) percentage removal of 54.2% and 62.33%, respectively achieved after 5th cycle. Surfactant modified kaolin clay mineral showed higher adsorption capacity towards As(III) and As(V) as compared to unmodified kaolin clay mineral and competitive with other adsorbent in the literature. The results obtained from this study revealed that surfactant modified kaolin mineral is a candidate material for arsenic remediation from groundwater.

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Section: Introductionmentioning

confidence: 99%

Performance evaluation of surfactant modified kaolin clay in As(III) and As(V) adsorption from groundwater: adsorption kinetics, isotherms and thermodynamics

Mudzielwana¹,

Gitari²,

Ndungu

2019

Heliyon

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“…In the groundwater naturally occurring microorganisms oxidize organic matter and generate hydrogencarbonate and salt of carbonic acid which ultimately enhances the alkalinity of the solution and release As from mineral surfaces. Antropogenically As and its compounds are widely used (as fertilizers, pesticides, drugs, feed additives and wood preservatives) and finds their entry into groundwater ( Henke, 2009 ; Kumar et al, 2019 ; Saikia et al, 2017 ).…”

Section: Introductionmentioning

confidence: 99%

Geogenic arsenic removal through core–shell based functionalized nanoparticles: Groundwater in-situ treatment perspective in the post–COVID anthropocene

Raval

Kumar

2021

Journal of Hazardous Materials

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“…Moreover, the suitability of both biochar and hydrochars can be improved through chemical activation via HCl [14], ZnCl 2 [1], H 3 PO 4 [2], KOH [15], etc., since they provide high surface area and high porosity [16]. In this regard, several literature works have reported the performance of various agricultural wastes such as rice husk [17], Perennial grass [18], wheat straw [19], etc. as a sustainable precursor for the production of activated char.…”

Section: Introductionmentioning

confidence: 99%

Preparation, characterization and cost analysis of activated biochar and hydrochar derived from agricultural waste: a comparative study

et al. 2019

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Utilization of low-cost, abundant and biomaterials is highly recommended for sustainable environment protection. This study presents a comparative analysis on the preparation, characterization and cost analysis of the novel activated biochar (BTS) and activated hydrochar (HTS). Teff (Eragrostis tef) straw was used as a precursor for producing BTS and HTS through pyrolysis and hydrothermal carbonization process, respectively. Both chars were further activated using 30 wt% H 3 PO 4 for 3 h activation time. The physicochemical properties of both chars were compared by different characterization techniques including BET, FTIR, XRD, SEM, and TGA. Briefly, BTS exhibited heterogeneous surface structures and comparatively larger specific surface area (627.7 m 2 /g) than that of HTS (43.8 m 2 /g) with the smooth coalesced carbon layer and dull surface edges. The XRD analysis revealed the amorphous character of HTS which is dominantly composed of AlPO 4 , whilst indicating BTS to be the crystalline structure with the very trivial amount of impurities. The oxygen-containing functional groups increased for HTS in comparison to BTS. Thermogravimetric analysis showed that HTS exhibited better thermal behaviors. Estimated costs incurred in the production of the HTS were found to be cheaper than compared to BTS. Overall, the experiment result suggested that Teff straw could have the potential for producing a low cost activated chars.

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Removal of arsenic and fluoride from aqueous solution by biomass based activated biochar: Optimization through response surface methodology

Cited by 69 publications

References 48 publications

Performance evaluation of surfactant modified kaolin clay in As(III) and As(V) adsorption from groundwater: adsorption kinetics, isotherms and thermodynamics

Performance evaluation of surfactant modified kaolin clay in As(III) and As(V) adsorption from groundwater: adsorption kinetics, isotherms and thermodynamics

Geogenic arsenic removal through core–shell based functionalized nanoparticles: Groundwater in-situ treatment perspective in the post–COVID anthropocene

Preparation, characterization and cost analysis of activated biochar and hydrochar derived from agricultural waste: a comparative study

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