Novel citric acid-functionalized brown algae with a high removal efficiency of crystal violet dye from colored wastewaters: insights into equilibrium, adsorption mechanism, and reusability

Essekri, Abdelilah; Hsini, Abdelghani; Naciri, Yassine; Laabd, Mohamed; Ajmal, Zeeshan; Ouardi, Mahmoud El; Addi, Abdelaziz Aït; Albourine, Abdallah

doi:10.1080/15226514.2020.1813686

Cited by 80 publications

(15 citation statements)

References 78 publications

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“…The point of zero charge (pH PZC ) values of AS and NaOH-AS were determined according to the potentiometric titration method described by Essekri et al (2021). In a typical procedure, 0.15 g of sample (AS or NaOH-AS) was added into a series of 50 mL of NaCl (0.01 M) solutions at different initial pH i values (from 2 to 12).…”

Section: Adsorbent Preparation and Characterizationmentioning

confidence: 99%

Efficient removal of crystal violet dye from aqueous solutions using sodium hydroxide-modified avocado shells: kinetics and isotherms modeling

Haki

Imgharn

Aarab

et al. 2021

Water Science and Technology

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The main objective of this study is to optimize a new composite for the depollution of contaminated water. The sodium hydroxide-modified Avocado shells (NaOH-AS) were firstly prepared, characterized by field-emission-scanning-electron-microscopy (FE-SEM), X-ray energy dispersive spectroscopy (EDS) and Fourier transforms infrared (FT-IR) spectroscopy, and applied for efficient removal of Crystal violet dye (CV) in wastewater. In addition, the adsorption in a batch system of CV dye on the NaOH-AS material was studied. Therefore, we accomplished a parametric study of the adsorption by studying the effect of several important parameters on the decolorizing power of the used material, namely, initial pH, contact time, initial CV dye concentration, temperature, and the ionic strength effect on the CV dye adsorption process were systematically assessed. The highest adsorption efficiency of CV dye (>96.9%) by NaOH-AS was obtained at pH >8. The pseudo-second-order kinetic model gave the best description of the adsorption kinetic of CV dye on the AS and NaOH-AS adsorbents. Besides, the mass transfer of CV dye molecules from the solution to the adsorbent surface occurred in three sequential stages (boundary layer diffusion, intraparticle diffusion and adsorption equilibrium). The adsorption isotherm data were best fitted with the Freundlich model. The adsorption capacity of AS increased from 135.88 to 179.80 mg g−1 after treatment by 1 M NaOH. The thermodynamic study showed that CV dye adsorption onto NaOH-AS was an exothermic and feasible process. The electrostatic interactions acted as the only forces governing the CV adsorption mechanism. The NaOH-AS demonstrated a satisfactory reusability. Therefore, we can state that the as-developed NaOH-AS material has a potential application prospect as an efficient adsorbent for CV dye from wastewaters.

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Section: Adsorbent Preparation and Characterizationmentioning

confidence: 99%

Efficient removal of crystal violet dye from aqueous solutions using sodium hydroxide-modified avocado shells: kinetics and isotherms modeling

Haki

Imgharn

Aarab

et al. 2021

Water Science and Technology

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“…In the last decades, the pollution of water by organic and inorganic chemical pollutants has become a major public worry (Chennah et al 2018(Chennah et al , 2019Hsini et al 2020aHsini et al , 2020bAbdellaoui et al 2021;Ajmal et al 2021;Laabd et al 2022). Dyes are pollutants that can be seen by the naked eye (Essekri et al 2020;Ferraa et al 2020). They are utilized in different industries like elastic, plastics, and beauty care products (Fegousse et al 2019).…”

Section: Introductionmentioning

confidence: 99%

“…They are utilized in different industries like elastic, plastics, and beauty care products (Fegousse et al 2019). Besides, colored chemicals in the aquatic environment lead to a considerable reduction in light transmittance and the amount of dissolved oxygen in water, thereby affecting the plant photosynthesis activity (Essekri et al 2020). Moreover, synthetic dyes are well known as stable and complex biodegradable compounds, which promote their accumulation in aquatic ecosystems (Essekri et al 2020).…”

Section: Introductionmentioning

confidence: 99%

“…Besides, colored chemicals in the aquatic environment lead to a considerable reduction in light transmittance and the amount of dissolved oxygen in water, thereby affecting the plant photosynthesis activity (Essekri et al 2020). Moreover, synthetic dyes are well known as stable and complex biodegradable compounds, which promote their accumulation in aquatic ecosystems (Essekri et al 2020). Over 7 Â 10 5 tones and 10,000 different types of dyes and pigments are produced worldwide annually.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and characterization of arginine-doped heliotrope leaves with high clean-up capacity for crystal violet dye from aqueous media

Brini

Hsini

Naciri

et al. 2021

Water Science and Technology

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Novel an arginine-modified Heliotrope leaf (Arg@HL) was used as adsorbent for the crystal violet (CV) dye adsorption in a batch process. The physicochemical and morphological composition of Arg@HL were characterized by field-emission-scanning-electron-microscopy (FE-SEM), Fourier transforms infrared (FT-IR) spectroscopy, thermogravimetric analysis (TGA), differential scanning calorimetry (DSC). The experiments were carried out to investigate the factors that influence the dye uptake by the adsorbent, such as the contact time under agitation, adsorbent amount, initial dye concentration, temperature and pH of dye solution. The optimum conditions of adsorption were found on the batch scale as followed: CV concentration of 20 mg·L−1, an amount of 0.75 g·L−1 of the adsorbent, 90 min contact time, 6 pH and 25 °C temperature for Arg@HL. The results confirmed a second-order model explaining the dye crystal violet's adsorption's kinetics by Arg-Heliotrope leaves. The Langmuir model effectively defines the adsorption isotherms. The results revealed that the Arg@HL has the potential to be used as a low-cost adsorbent for the removal of CV dye from aqueous solutions.

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“…), polymers have been widely used in research fields, such as, biology, energy, and environment. For example, conductive polymer polyaniline (PANI) has been used to adsorb heavy metals, 23 dyes, 24,25 and emerging pollutants, 26,27 as well as photocatalytic degradation of organic pollutants 28,29 . In the field of biology research, due to its advantages of adjustable elasticity, air permeability, low toxicity, low cost and simple preparation, polydimethylsiloxane (PDMS) with (Si‐O) skeleton has been widely used in microfluidics, sensors, flexible electronic devices and research on cell microenvironment 30,31 .…”

Section: Introductionmentioning

confidence: 99%

The effect of curvature on chondrocytes migration and bone mesenchymal stem cells differentiation

Cao

Liu

et al. 2020

J of Applied Polymer Sci

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Numerous cells grow in columnar tissues and organs with different curvatures and curvature gradients. Therefore, it is necessary to study the effect of curvature on cell behavior to control and promote cell development. Herein, we prepared polydimethylsiloxane (PDMS) with different micro‐nano patterns using ultraviolet soft lithography. Hydrophilic polydopamine (PDA) was modified on the PDMS surface to prepare PDMS/PDA to improve its biocompatibility. The PDMS/PDA was characterized by contact angle tester and scanning electron microscopy (SEM). The effect of curvature on bone cell migration and differentiation was studied through SEM, inverted phase contrast microscope and fluorescence microscopy. We found that different curvatures had different effects on the bone cell migration and differentiation. Chondrocytes migrated rapidly in grooves with a curvature range of 1/575–1/875 μm−1. Bone mesenchymal stem cells (BMSCs) had high efficiency of differentiation into chondrocytes in the grooves with a curvature range of 1/775–1/1375 μm−1. Furthermore, BMSCs showed high efficiency of differentiation into chondrocytes at the edges of micro‐nano patterns with different perimeter curvatures, and the differentiation efficiency was the highest at 120° convex curvature. This work shows that curvature is a principle to be considered in bone tissue regeneration engineering and provides inspiration for future biomaterials design.

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Novel citric acid-functionalized brown algae with a high removal efficiency of crystal violet dye from colored wastewaters: insights into equilibrium, adsorption mechanism, and reusability

Cited by 80 publications

References 78 publications

Efficient removal of crystal violet dye from aqueous solutions using sodium hydroxide-modified avocado shells: kinetics and isotherms modeling

Efficient removal of crystal violet dye from aqueous solutions using sodium hydroxide-modified avocado shells: kinetics and isotherms modeling

Synthesis and characterization of arginine-doped heliotrope leaves with high clean-up capacity for crystal violet dye from aqueous media

The effect of curvature on chondrocytes migration and bone mesenchymal stem cells differentiation

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