Agricultural waste peels as versatile biomass for water purification – A review

A review on modified sugarcane bagasse biosorbent for removal of dyes.

In this article, adsorption process has been found to be one of the best treatment methods for Methylene blue (MB) removals. As the control of water pollution has become an increasing importance in recent years, the use of physical/chemical treatments such as membrane filtration, reverse osmosis, coagulation/flocculation and fenton reagents are not economically feasible. The use of different biosorbent as an alternative low cost adsorbent in the removal of methylene blue has been extensively studied and compiled, together with their adsorption capacities and experimental conditions such as adsorbent dose, pH of the solution, temperature and equilibrium time. But, there are issues as regards to draw back in the use of activated sorbents which were also discussed briefly. However, it is evident from the results of experiments in the literatures surveyed that various low-cost adsorbents have shown good potential for MB.

Removal of Methylene Blue Using Low Cost Adsorbent: A Review

Over the last few years, various industries have released wastewater containing high concentrations of dyes straight into the ecological system, which has become a major environmental problem (i.e., soil, groundwater, surface water pollution, etc.). The rapid growth of textile industries has created an alarming situation in which further deterioration to the environment has been caused due to substances being left in treated wastewater, including dyes. The application of activated carbon has recently been demonstrated to be a highly efficient technology in terms of removing methylene blue (MB) from wastewater. Agricultural waste, as well as animal-based and wood products, are excellent sources of bio-waste for MB remediation since they are extremely efficient, have high sorption capacities, and are renewable sources. Despite the fact that commercial activated carbon is a favored adsorbent for dye elimination, its extensive application is restricted because of its comparatively high cost, which has prompted researchers to investigate alternative sources of adsorbents that are non-conventional and more economical. The goal of this review article was to critically evaluate the accessible information on the characteristics of bio-waste-derived adsorbents for MB’s removal, as well as related parameters influencing the performance of this process. The review also highlighted the processing methods developed in previous studies. Regeneration processes, economic challenges, and the valorization of post-sorption materials were also discussed. This review is beneficial in terms of understanding recent advances in the status of biowaste-derived adsorbents, highlighting the accelerating need for the development of low-cost adsorbents and functioning as a precursor for large-scale system optimization.

/pdf/recent-developments-in-the-application-of-bio-waste-derived-2uo2zb7z.pdf

Recent Developments in the Application of Bio-Waste-Derived Adsorbents for the Removal of Methylene Blue from Wastewater: A Review

The waste management becomes particular nowadays and waste conversion into valuable materials is one of the promising alternative capable of reducing the resource depletion rate. The performance of lignocellulosic residues, pineapple plant stem (PPS) for cationic (Basic Blue 3, BB3) and anionic (Congo Red, CR) dyes removal has been evaluated in a batch process, using different parameters such as, pH, contact time, agitation rate, initial dye concentration and sorbent dosage. The kinetics of both dyes sorption fitted well with pseudo-second order kinetic model. Boundary layer effect and intraparticle diffusion models were applied to study the rate-limiting step. The isotherm data of BB3 could be well described by Freundlich model (r2 = 0.998) whilst high coefficient of determination of CR obtained from Langmuir (r2 = 0.999) and Temkin (r2 = 0.996) models. The maximum sorption capacities for BB3 and CR were found to be 58.983 and 11.966 mg g−1, respectively under a favourable sorption process. The BB3 and CR adsorption on PPS was found to be exothermic. The result suggests that PPS has higher affinity on cationic than anionic dye. The promising regeneration capability of PPS using acid, implied PPS was a potential biosorbent for BB3 removal.

Equilibrium, kinetic and thermodynamic studies of a new potential biosorbent for the removal of Basic Blue 3 and Congo Red dyes: pineapple (Ananas comosus) plant stem

A waste material with practically no cost, durian peel (DP) was studied for its ability to remove Basic blue 3 (BB3) from aqueous solutions. Batch kinetic studies were carried out to study the adsorption characteristics under various experimental conditions. The optimum pH for the dye removal occurred in the pH range of 3–10. Adsorption was found to be concentration dependent. The kinetics of dye adsorption fitted a pseudo-second order rate expression. Both Langmuir and Freundlich models appeared to provide reasonable fittings for the adsorption data of BB3 on DP. Application of Langmuir isotherm indicated that under the experimental condition of room temperature (25 ± 2°C) with natural pH of the dye solution and shaken at 150 rpm, the maximum adsorption capacity of DP for BB3 was 49.50 mg g−1. The percentage uptake of BB3 increased with the increase in temperature. Adsorption of BB3 was found to be endothermic and various thermodynamic parameters were evaluated using van’t Hoff plot.

Equilibrium studies for basic blue 3 adsorption onto durian peel (Durio zibethinus Murray)

Plackett–Burman design was applied to identify the most significant factors in the removal of Basic Blue 3 (BB3), Methylene Blue (MB) and Basic Yellow 11 (BY11) by natural sugarcane bagasse. The effect of operating parameters on dye uptake was studied in a batch system and a mathematical model showing the influence of each variable was obtained. The interaction between the factors and their optimum levels for maximum percentage uptake of BB3 and MB were determined using Response Surface Methodology (RSM). Both models were highly significant with correlation coefficients (R 2) of 0.9932 and 0.9944 for BB3 and MB, respectively in binary dye solution. For BB3, the optimum adsorption conditions were determined as initial pH 6.00, contact time 122.50 min, initial dye concentration 50 mg/L and sorbent dosage 0.09 g. Whereas for MB, the model predicted that an uptake greater than 90% could be obtained when the initial dye concentration, contact time and sorbent dosage were set at 80.40 mg/L, 192.37 min and 0.17 ...

/pdf/plackett-burman-design-and-response-surface-methodological-58xz306lmw.pdf

Plackett–Burman design and response surface methodological approach to optimize basic dyes removal using sugarcane bagasse

In the present study, Plackett–Burman design has been used to identify the significant factors affecting the removal of basic dyes using agricultural waste, sugarcane bagasse (natural sugarcane bagasse). The effect initial dye concentration and sorbent dosage were identified to be the variables responsible for affecting the percentage uptake of Basic Blue 3 (BB3) and Methylene Blue (MB) from aqueous solution. Meanwhile, none of the studied variables were found to be significantly affecting the percentage uptake of Basic Yellow 11 dye. The interaction between the factors and their optimum levels for maximum percentage uptake of dyes were determined using Response Surface Methodology. Both models were highly significant with correlation coefficients (R2) of 0.9947 and 0.9967 for BB3 and MB dye solutions, respectively. For BB3, the percentage uptake of 98.59 was obtained with optimized conditions at 50 mg L−1 initial dye concentration and 0.13 g sorbent dosage. Whereas for MB, under the optimum of 72...

Removal of basic dyes from aqueous solution using sugarcane bagasse: optimization by Plackett–Burman and Response Surface Methodology

Nitrilotriacetic acid modification on sugarcane bagasse was performed to evaluate its potential in the removal of basic blue 3 (BB3) from synthetic solution. To the best our knowledge, this is the first time the present modification was reported. A comparative study in the removal capacities of natural sugarcane bagasse (NSB) and nitrilotriacetic acid modified sugarcane bagasse (NTA-SB) indicated that NTA-SB shows an enhancement in BB3 sorption. The sorption characteristics of BB3 by NTA-SB were studied under various experimental conditions such as pH, contact time, initial concentration, sorption isotherm and agitation rate. The optimum pH for the removal of BB3 was recorded in the range of 5 to 9 and the sorption process correlated well with pseudo-second order kinetic model. Experimental data obtained were fitted into both Langmuir and Freundlich isotherm model and the maximum sorption capacity of NTA-SB calculated based on Langmuir model was 54.35 mg/g.

Nitrilotriacetic acid modified sugarcane bagasse in the removal of basic blue 3 from aqueous environment

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Equilibrium studies for basic blue 3 adsorption onto durian peel (Durio zibethinus Murray)

Plackett–Burman design and response surface methodological approach to optimize basic dyes removal using sugarcane bagasse

Removal of basic dyes from aqueous solution using sugarcane bagasse: optimization by Plackett–Burman and Response Surface Methodology

Nitrilotriacetic acid modified sugarcane bagasse in the removal of basic blue 3 from aqueous environment