Low-cost sorbents for the removal of acid dyes from aqueous solutions

Creţescu, Igor; Lupaşcu, Tudor; Buciscanu, Ingrid Ioana; Balau-Mindru, Tudorel; Soreanu, Gabriela

doi:10.1016/j.psep.2016.05.016

Cited by 26 publications

(6 citation statements)

References 36 publications

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“…The high microporosity percentage (91%) combined with the high BET surface area calculated with CO 2 reveals the important role of microporosity on gas adsorption. This percentage also indicates that the chemical activation process generates a high-quality carbonaceous material in which micropores are predominant [25].…”

Section: Activated Carbon Characterization Before Adsorptionmentioning

confidence: 91%

“…Furthermore, in most of the studies [5,14,19,20], the raw material is washed or pre-treated which increases the use of chemicals in the production of activated carbon. Different waste biomass has been converted into activated carbon and has been successfully used to remove acid dyes from wastewaters: Paulownia tomentosa wood to remove acid red 4 [24], apple wood to remove acid red 337 and acid blue 349 [25], walnut and poplar woods to remove acid red 18 [26], pine-cone to remove acid black 1 and acid blue 113 [27].…”

Section: Introductionmentioning

confidence: 99%

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Preparation of activated carbon from pine (Pinus radiata) sawdust by chemical activation with zinc chloride for wood dye adsorption

Pimentel

Freire

Gómez‐Díaz

et al. 2023

Biomass Conv. Bioref.

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Wastewater containing dyes are released into water bodies generating serious problems in human health and marine life. To contribute to the solution of this problem, a novel activated carbon was prepared from untreated pine (Pinus radiata) sawdust by dry chemical activation with ZnCl2 and was used for wood dye adsorption. The carbon was characterized by point of zero charge, N2 and CO2 adsorption isotherms, SEM-EDX, and FTIR. N2 and CO2 surface areas were 471.4 and 319.5 m2 g−1, respectively, with 91% of micropores. Wood dye adsorption was studied in function of pH (2–12), adsorbent dose (0.1–4 g L−1), time (up to 48 h for blue and red and 12 h for black), and initial concentration (5–500 mg L−1). The equilibrium data for the blue and black dyes were satisfactorily fitted to the Freundlich model while those for the red dye to the Langmuir model. Kinetic data were explained by the pseudo-second order (chemisorption process) and intraparticle diffusion models. At 5 mg L−1, a 100% removal efficiency was achieved at all pH for the blue dye, whereas for the red and black, natural pH (5.1) and pH = 2, respectively, led to the best removal efficiencies, 96 and 56%. Increasing concentration above 25 mg L−1 significantly reduced adsorption efficiency for blue and red dyes. For the black dye increasing the dose to 1 g L−1, the adsorption efficiency reached 82% at 25 mg L−1. High removal efficiencies were achieved for all dyes at 25 mg L−1 and 4 g L−1.

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Section: Activated Carbon Characterization Before Adsorptionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Preparation of activated carbon from pine (Pinus radiata) sawdust by chemical activation with zinc chloride for wood dye adsorption

Pimentel

Freire

Gómez‐Díaz

et al. 2023

Biomass Conv. Bioref.

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“…fibers, pores scarcely appear in some, and some others may possess naturally wide-open pores and hollows. Fibrous character is synonymous with wood waste [17], and a range of water pollutants can be locked up within the crop residue fibers. Pores and hollows also serve as mediums for transporting various types of pollutants into the bioadsorbents.…”

Section: Biomass Volume Estimation and Valorization For Energymentioning

confidence: 99%

Biomass Valorization: Agricultural Waste in Environmental Protection, Phytomedicine and Biofuel Production

Abosede¹,

Peter²,

Adunola³

2017

Biomass Volume Estimation and Valorization for Energy

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Industrialization is a major promoter of any nation's economy; it is not without detrimental effects on our immediate environment. Human exposure to various pollutants discharged into the environment may lead to serious health challenges. In the same vein, discharge from the combustion of fossil fuel contributes a great deal to the environmental pollution. The resulting quest for a clean and sustainable environment has spurred myriads of research into advantageous utilization of waste biomass in industrial wastewater treatment and environmentally friendly/alternative energy. Similarly, diverse waste materials have been adopted as sources of important phytochemicals with different medicinal applications. This chapter focuses on the application of waste biomass in environmental remediation, curative medicine, and clean/alternative energy.

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“…They are cheap and widely available, especially in developed countries. So far, research has been carried out on the removal of dyes on waste materials from the agricultural industry such as plant stalks, leaves, nut shells or fruit skins [16,17]. Their sorption capacity is mainly due to the high contents of polysaccharides, lignin and proteins.…”

Section: Introductionmentioning

confidence: 99%

The Use of Rapeseed Husks to Remove Acidic and Basic Dyes from Aquatic Solutions

Jóźwiak,

Filipkowska

2024

Applied Sciences

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This study aimed to identify the possibility of using rapeseed husks (RH) as an unconventional sorbent for removing acidic (AR18, AY23) and basic (BR46, BV10) dyes from aqueous solutions. Its scope included, i.a.: sorbent characterization (FTIR, pHPZC), determination of pH effect on dye sorption effectiveness (pH 2–11), analysis of dye sorption kinetics (pseudo-first order model, pseudo-second order model, intraparticular diffusion model), and the determination of the maximum sorption capacity (Langmuir 1 and 2, and Freundlich isotherms). The sorption effectiveness of acidic dyes (AR18, AY23) onto RH was the highest at pH = 2, whereas that of the basic dyes BR46 and BV10 was most effective at pH = 6 and pH = 3, respectively. The time needed to reach the sorption equilibrium of dyes onto RH depended on their initial concentration and ranged from 120 to 150 min for the acidic dyes and from 150 to 180 min for the basic dyes. The maximum sorption capacity (Qmax) of RH towards AR18 and AY23 was 49.37 mg/g and 41.52 mg/g, respectively, and towards BR46 and BV10 it was 59.07 mg/g and 20.93 mg/g, respectively. The obtained Qmax values were compared with the results achieved for other sorbents (literature data). This comparison demonstrated that the sorption capacity of rapeseed husks towards the analyzed dyes was higher compared to that of some types of activated carbons.

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Low-cost sorbents for the removal of acid dyes from aqueous solutions

Cited by 26 publications

References 36 publications

Preparation of activated carbon from pine (Pinus radiata) sawdust by chemical activation with zinc chloride for wood dye adsorption

Preparation of activated carbon from pine (Pinus radiata) sawdust by chemical activation with zinc chloride for wood dye adsorption

Biomass Valorization: Agricultural Waste in Environmental Protection, Phytomedicine and Biofuel Production

The Use of Rapeseed Husks to Remove Acidic and Basic Dyes from Aquatic Solutions

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