Analysis of equilibrium, kinetic, and thermodynamic parameters for biosorption of fluoride from water onto coconut (Cocos nucifera Linn.) root developed adsorbent

George, Aju Mathew; Tembhurkar, A. R.

doi:10.1016/j.cjche.2018.03.004

Cited by 26 publications

(8 citation statements)

References 14 publications

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“…The peak about 1628 cm −1 corresponded to the stretching vibration of the amide in FFS [35]. The peak around 1404 cm −1 was associated with O-H stretching [36]. The peak near 1128 cm −1 corresponded to sulfonic acid groups (SO 3 H) [37].…”

Section: Resultsmentioning

confidence: 97%

Efficient Synthesis of Furfural from Corncob by a Novel Biochar-Based Heterogeneous Chemocatalyst in Choline Chloride: Maleic Acid–Water

Yang,

Li,

et al. 2023

Catalysts

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The use of plentiful and renewable feedstock for producing chemicals is fundamental for the development of sustainable chemical processes. Using fish scale as a biobased carrier, a novel biochar SO42−/SnO2-FFS heterogeneous chemocatalyst was prepared to catalyze furfural production from xylose-rich corncob-hydrolysates obtained from acid hydrolysis of corncob in a deep eutectic solvent (DES)–water system. By characterizing the physical as well as chemical properties of SO42−/SnO2-FFS by NH3-TPD, FT-IR, XPS, XRD, and SEM, it was shown that the chemocatalyst had Lewis/Brönsted acid centers, and its surface roughness could be well expanded to contact substrates. The corncob was initially hydrolyzed at 140 °C to obtain xylose-rich hydrolysate. Subsequently, SO42−/SnO2-FFS (3.6 wt.%) was used to catalyze the corn cob hydrolysate containing D-xylose (20.0 g/L) at a reaction temperature of 170 °C for 15 min. Additionally, ZnCl2 (20.0 g/L) was added. Ultimately, furfural (93.8 mM, 70.5% yield) was produced in the deep eutectic solvent ChCl:maleic acid–water (DESMLA–water = 10:90, v/v). A synergistic catalytic mechanism for transforming xylose-rich corncob-hydrolysate into furfural and byproducts were proposed using SO42−/SnO2-FFS as a chemocatalyst in DESMLA–water containing ZnCl2. Consequently, the efficient use of biochar SO42−/SnO2-FFS chemocatalysts for the sustainable synthesis of biobased furan compounds from biomass holds great promise in the future.

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Section: Resultsmentioning

confidence: 97%

Efficient Synthesis of Furfural from Corncob by a Novel Biochar-Based Heterogeneous Chemocatalyst in Choline Chloride: Maleic Acid–Water

Yang,

Li,

et al. 2023

Catalysts

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“…The more negative values of ∆G o with the rise in temperature indicate higher temperatures make the sorption favorable. The positive value of Δ H ° (15.530 KJ/mol) indicates that the adsorption phenomenon is endothermic in nature (George & Tembhurkar, ,; Murugan & Subramanian, ). The positive value of entropy change (Δ S = 53.34 J/mol/K) suggests an increase in randomness with an increase in temperature.…”

Section: Resultsmentioning

confidence: 99%

“…It is called Vata in Ayurveda. The plants belonging to Ficus family have been already proven to be effective in removing fluoride from water over the past few years like Ficus glomerata bark (George & Tembhurkar, ,) and Ficus religiosa (Tembhurkar & Dongre, ). As the leaves contribute to waste materials produced from the tree, and since it is abundantly available, an effective adsorbent which can be potentially used for removing fluoride from water is developed from Ficus benghalensis leaves has been carried out.…”

Section: Methodsmentioning

confidence: 99%

“…Adsorption technique has been the most extensively applied method for removing dyes (Bhatti, Jabeen, Iqbal, Noreen, & Naseem, ; Shoukat, Bhatti, Iqbal, & Noreen, , Sana Nausheen, Bhatti, Hanif, & Khalil‐ur‐Rehman, ) and metallic ions (Kamsonlian, Balomajumder, & Chand, ; Nashine & Tembhurkar, ), and defluoridation of water is no exception, because of its low cost, the simplicity of design, and ease of operation (George & Tembhurkar, ,; Ogata, Tominaga, Yabutani, & Kawasaki, ). Biosorption is one of the recent trends focused on having the potential for defluoridation and is strongly recommended by scientists as an efficient and economically sustainable technology for defluoridation (Viswanathan & Meenakshi, ).…”

Section: Introductionmentioning

confidence: 99%

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Optimization of defluoridation using Ficus benghalensis leaf biosorbent through Taguchi's method

George

Tembhurkar

2019

Water Environment Research

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Present research focuses on optimization of process parameters for defluoridation on novel Ficus benghalensis leaf biosorbent using Taguchi design tool. The maximum fluoride removal is obtained at pH 7, initial concentration 5 mg/L, contact time 120 min, adsorbent dose 10 g/L, and temperature 30°C, and its percentage contribution is found using ANOVA in the following order: pH 50.76% > initial concentration of adsorbate 44.76% > contact time 2.54% > adsorbent dose 1.17% > temperature 0.76%. It follows Langmuir isotherm with constants “a” and “b” obtained as 2.183 mg/g and 0.667 L/mg and fitting well with pseudo‐second‐order kinetic model. The thermodynamic study indicated the spontaneous and endothermic nature (ΔH = 15,530.55 J/mol). Advanced Analyses, viz., BET, FESEM‐EDS, and FTIR are done to know the characteristics of Ficus benghalensis leaf biosorbent. Experiment on defluoridation of contaminated groundwater indicated over 90% removal efficacy, and the concentration of treated water satisfies drinking water standards for fluoride. Practitioner points A fundamental research leading towards development of a novel biosorbent from Ficus benghalensis leaves waste for defluoridation. Necessary adsorption equilibrium, kinetic and thermodynamic studies to arrive at optimum operating parameters using Taguchi method and constants useful for designing defluoridation unit and advanced analysis mainly BET, FESM‐EDS and FTIR to have better insight. Validation on real field samples to prove its technical feasibility of defluoridation using the novel biosorbent developed.

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“…Heavy metal pollution represents a signiϐicant global environmental concern due to the persistence and toxicity of these non-biodegradable elements. These metals exhibit various adverse effects on human health and pose a threat to the environment [1] [2]. Lead, chromium, cadmium, copper, arsenic, nickel, cobalt, mercury, zinc, and others are introduced into water bodies from diverse industries such as batteries, electroplating, mining, alloys, ore reϐining, incinerators, paints, tanneries, petrochemicals, automobiles, and metal processing [3] [4].…”

Section: Introductionmentioning

confidence: 99%

Optimization Study of Adsorption parameter for the removal of Zinc (Zn) and Arsenic (As) on Activated Coconut Shell (ACS) Adsorbent using Response Surface Methodology

Priyadharshini,

Abraham,

Nirmala

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

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A large portion of the water environment is being contaminated and destroyed due to the direct liberation of industrial effluents, agricultural and municipal activities that are toxic to humans, animals, and plants. Among the several pollutants, heavy metals are considered to be a serious hazard and the presence arsenic in water will cause carcinogenic to humans. In this study, for sustainability easily available eco-friendly materials were used for the adsorption of heavy metal. An aqueous solution of zinc and arsenic metal was prepared and adsorption of heavy metal was performed by varying pH, initial concentration, time, and dosage. The metal productivity was optimized using Response Surface Methodology (RSM) with central composite design (CCD) by varying the obtained data. The model prediction result is in agreement with experimented result (R2=0.9706, 0.9799 adj R2=0.9432,0.9572 for and coconut shell carbon). ANOVA table shows that the adsorption of arsenic and zinc metal to carbon made from coconut shell. The optimization of carbon made from coconut shell pH, initial concentration, time, and dosage found to be the maximum adsorption capacity of both adsorbent pH (7,7), initial concentration (40,30), contact time (60,90), adsorbent dosage (0.3,0.3) was obtained. Characterization of activated coconut shell carbon was carried out by SEM.

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Analysis of equilibrium, kinetic, and thermodynamic parameters for biosorption of fluoride from water onto coconut (Cocos nucifera Linn.) root developed adsorbent

Cited by 26 publications

References 14 publications

Efficient Synthesis of Furfural from Corncob by a Novel Biochar-Based Heterogeneous Chemocatalyst in Choline Chloride: Maleic Acid–Water

Efficient Synthesis of Furfural from Corncob by a Novel Biochar-Based Heterogeneous Chemocatalyst in Choline Chloride: Maleic Acid–Water

Optimization of defluoridation using Ficus benghalensis leaf biosorbent through Taguchi's method

Optimization Study of Adsorption parameter for the removal of Zinc (Zn) and Arsenic (As) on Activated Coconut Shell (ACS) Adsorbent using Response Surface Methodology

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