Investigation of the sorption characteristics of water lettuce (WL) as a potential low-cost biosorbent for the removal of methyl violet 2B

Lim, Linda B.L.; Priyantha, Namal; Chan, Chin Mei; Matassan, Diyanah; Chieng, Hei Ing; Kooh, Muhammad Raziq Rahimi

doi:10.1080/19443994.2015.1017740

Cited by 14 publications

(5 citation statements)

References 43 publications

(38 reference statements)

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“…The Redlich–Peterson and Sips adsorption isotherm models are three-parameters models which combine both the Langmuir and Freundlich isotherms. , The Redlich–Peterson isotherm can be applied on homogeneous or heterogeneous adsorption processes . The Sips isotherm is used to predict the adsorption over the heterogeneous surface and explained the adsorption energy distribution on the surface of the adsorbent Figures S10d–f and 11a,b show the fitting adsorption isotherms models, and the outcomes of these isotherms are tabulated in Table .…”

Section: Results and Discussionmentioning

confidence: 99%

“…53 The Sips isotherm is used to predict the adsorption over the heterogeneous surface and explained the adsorption energy distribution on the surface of the adsorbent. 54 Figures S10d−f and 11a,b show the fitting adsorption isotherms models, and the outcomes of these isotherms are tabulated in Table 2. The experimental data was most likely matched with the Langmuir model, with a higher regression coefficient value (0.9902), and the maximum adsorption capacity was calculated to be 398.40 mg/g.…”

Section: Adsorption Isothermmentioning

confidence: 99%

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Effective Adsorption–Desorption Kinetic Study and Statistical Modeling of Bentazon Herbicide Mediated by a Biodegradable β-Cyclodextrin Cross-Linked Poly(vinyl alcohol)–Chitosan Hydrogel

Sharma,

Laddha

et al. 2023

ACS Agric. Sci. Technol.

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Indiscriminate use of pesticides to meet the global demand for food has contaminated groundwater and surface water, affecting the global environment. In view of this, it is imperative to find an economical solution to this critical issue. Herein, a novel β-cyclodextrin cross-linked poly(vinyl alcohol)−chitosan (PVA/CS/β-CD) hydrogel is reported for the adsorption of bentazon (BZ) herbicide. The properties of the PVA/CS/β-CD hydrogel, such as its surface morphology, surface area, thermal stability, and the presence of functional groups, have profound effects on the adsorption of BZ on its surface, and hence these have been investigated by FESEM, BET, TGA, and FT-IR analytical techniques. Several influential factors, viz., pH of the solution, temperature, initial concentration of BZ, contact time, and mass of the hydrogel, have been explored by the Box−Behnken design model and systematic batch studies. From the response surface methodology model, 13.45 mg of hydrogel was able to remove 93.71% of BZ from 10 mL of a 10 mg/L solution at pH 7.4 in 120 min, as assessed by systematic batch adsorption studies. The adsorption behavior of BZ on the PVA/CS/β-CD hydrogel was thermodynamically spontaneous and endothermic. The maximum adsorption capacity was 398.40 mg/g, which comes from the Langmuir isotherm and follows pseudo-second-order model. BZ-loaded PVA/CS/ β-CD hydrogel can be recycled using methanol and shows good removal efficiency (>70%) for six consecutive adsorption− desorption cycles. Additionally, the BZ-adsorbed PVA/CS/β-CD hydrogel can be employed as a sustained release vehicle for BZ having long-term weedicide effects at diverse pH values in water.

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Section: Results and Discussionmentioning

confidence: 99%

Section: Adsorption Isothermmentioning

confidence: 99%

Effective Adsorption–Desorption Kinetic Study and Statistical Modeling of Bentazon Herbicide Mediated by a Biodegradable β-Cyclodextrin Cross-Linked Poly(vinyl alcohol)–Chitosan Hydrogel

Sharma,

Laddha

et al. 2023

ACS Agric. Sci. Technol.

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“…It is difficult to give a direct answer since each sorbent has its specific characteristics which influence its behavior in wastewater treatment. Their sorption capacities can also vary with changes in experimental conditions, making it difficult to compare their sorption performance …”

Section: Resultsmentioning

confidence: 99%

“…They proposed many unconventional sorbents derived from materials of natural origin as well as industrial and agricultural products . Among reported sorbents were clays (kaolinite, bentonite), zeolites, other inorganic materials (alunite, silica beads, perlite), as well as agricultural waste (maize cob, bagasse pith, coconut shell, rice husk), biosorbents (peat, chitosan, biomass), industrial waste products (metal hydroxide sludge, waste carbon slurries), and others (starch, cotton, and cyclodextrin) . All of these sorbents deserve special attention because they could reduce the costs of effluent treatment and waste recovery.…”

Section: Introductionmentioning

confidence: 99%

Eggshell as a New Biosorbent for the Removal of Pharmaceuticals From Aqueous Solutions

Pavlović

Ćurković

Macan

et al. 2017

CLEAN Soil Air Water

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The suitability of chicken eggshell as a novel sorbent for removal of pharmaceuticals (dexamethasone (DEX), febantel (FEB), praziquantel (PRAZ), procaine (PROC), and tylosin (TYL)) from water is investigated. Batch sorption experiments are performed to detect the effect of the initial concentration of pharmaceuticals, contact time, and temperature on the eggshell sorption capacity. The eggshell sample is characterized using Fourier transform IR spectroscopy, scanning electron microscopy combined with energy dispersive spectroscopy, and with particle and pore size distribution analyses. Equilibrium data are analyzed using Freundlich and Dubinin–Radushkevich isotherms. The thermodynamic parameters (ΔG°, ΔH°, and ΔS°) are calculated in order to predict the sorption nature. The results indicate that the sorption process is spontaneous and exothermic for PROC; spontaneous and endothermic for DEX, FEB, TYL; and non‐spontaneous and exothermic for PRAZ. According to the experimental results, chicken eggshell as mesoporous sorbent can be successfully used as an alternative and low‐cost biosorbent. The kinetic experimental data are fitted by Lagergren's and Ho's pseudo‐second‐order model. Kinetic parameters, rate constants, equilibrium sorption capacities, and correlation coefficients are estimated and discussed for both kinetic models. The pseudo‐second‐order model is suitable for prediction of sorption capacities. The mechanism of the sorption process is determined by the Weber–Morris intraparticle diffusion model and Boyd model. The sorption rate of investigated pharmaceuticals to chicken eggshells is influenced by both diffusion types: intraparticle and film diffusion.

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“…Low-cost adsorbents require little processing and found abundantly in nature. The various low cost adsorbents have been investigated by researchers like agricultural waste, 4 banana peel, 5 Ficus carica, 6 apple peels, 7 apricot stone, 8 bagasse fly ash, 9 peat, 10 abundant weeds, 11 walnut shell, 12 soya waste, 13 hen feather, 14 oil palm midrib, 15 sugarcane baggase, 16 Typha angustifolia, 17 natural zeolites, 18 sewage sludge, 19 etc. The objective of the present work is to study the adsorption of congo red (CR), methylene blue (MB) and crystal violet (CV) on dead biomass of weeds Parthenium hysterophorus and Saccharum munja.…”

Section: Introductionmentioning

confidence: 99%

Utilization of Unwanted Terrestrial Weeds for Removal of Dyes

Singh¹,

Kumar²,

Panghal³

et al. 2019

RJC

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Human welfare is adversely affected by unwanted and undesirable plants, which convert the useable land into a wasteland. The present study was an attempt to utilize unwanted weeds as a resource with the objective to evaluate the removal efficiency of two low cost adsorbents named as Raw Parthenium hysterophorus (RPH) and Raw Saccharum munja (RSM) for adsorption of dyes like Congo red (CR), Methylene blue (MB) and Crystal violet (CV). The batch study was carried out to study the impacts of various parameters like pH, adsorbent dose, initial dye concentration, contact time and shaking speed. The maximum adsorption for CR was 86% by RPH, MB was 98% and CV was 97% by RSM at dose 1g/100ml, 150rpm, dye concentration 50ppm, time 120 minutes and temperature 25C but optimized pH was varied according to dyes and type of adsorbents, it was ranged from 4 to 10. Adsorption isotherms were applied on the experimental data and found to be Freundlich isotherm was well fitted for RSM and RPH during MB dyes adsorption (r 2 = 0.892 & 0.858) as compared to CR and CV dyes. Low-cost adsorbents have potential to adsorb dyes from wastewater and show applicability in wastewater treatment process.

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Investigation of the sorption characteristics of water lettuce (WL) as a potential low-cost biosorbent for the removal of methyl violet 2B

Cited by 14 publications

References 43 publications

Effective Adsorption–Desorption Kinetic Study and Statistical Modeling of Bentazon Herbicide Mediated by a Biodegradable β-Cyclodextrin Cross-Linked Poly(vinyl alcohol)–Chitosan Hydrogel

Effective Adsorption–Desorption Kinetic Study and Statistical Modeling of Bentazon Herbicide Mediated by a Biodegradable β-Cyclodextrin Cross-Linked Poly(vinyl alcohol)–Chitosan Hydrogel

Eggshell as a New Biosorbent for the Removal of Pharmaceuticals From Aqueous Solutions

Utilization of Unwanted Terrestrial Weeds for Removal of Dyes

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