New optimization approach for amphoteric/magnetic ramie biosorbent in dyestuff adsorption

Peng, Yingying; Li, Yonggui; Liu, Leigen; Hao, Xibo; Cai, Kai; Xiong, Jiaqing; Hong, Wenyuan; Tao, Jin

doi:10.1016/j.bej.2022.108379

Cited by 9 publications

(3 citation statements)

References 55 publications

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“…Agricultural waste, plant‐based adsorbents, fungus, and bacteria are all examples of biosorbents. Plant‐based cellulose biosorbents, in particular, have attracted attention because of their high absorption capacity, lack of toxic waste formation, low cost, flexibility of use and renewability 25,26 …”

Section: Introductionmentioning

confidence: 99%

“…1 Hazardous organic-inorganic chemicals, persistent organic pollutants, and volatile pollutants, among other toxic components in wastewater, are dangerous to both the ecosystem and human health. 2 Phosphate (PO 3À 4 ) from organic contaminants is necessary for plant growth, but when phosphate levels in surface water surpass 25 μg/L, it can speed up the algal blooms growth and induce eutrophication. Eutrophication caused by algal overgrowth can deplete water self-cleaning capacity, cause damage on water systems and lower water quality.…”

Section: Introductionmentioning

confidence: 99%

“…Plant-based cellulose biosorbents, in particular, have attracted attention because of their high absorption capacity, lack of toxic waste formation, low cost, flexibility of use and renewability. 25,26 This study was aimed to purify phosphate and anionic dye ( DO 46) in aquatic environment using a biosorbent obtained from tomato stem. A waste material including tomato stem was chosen as a natural adsorbent free of chemical compounds since the study that identified the gap in the literature prior to this investigation, in which only the adsorbent derived from tomato stem ash was employed.…”

Section: Introductionmentioning

confidence: 99%

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Adsorption of Direct Orange 46 and phosphate ions on waste tomato stem ash used as a bio‐based adsorbent

Eskikaya

Arslan

Gün

et al. 2023

Env Prog and Sustain Energy

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It is necessary to use adsorbents derived from natural materials, such as biosorbents since they do not any damage to the environment, for pollutants elimination that contaminate the aquatic environment. Since the deficiency in the literature was determined in the study in which only the adsorbent obtained from tomato stem was used before this study, a waste material with tomato stem was selected as a natural adsorbent without chemical compounds. Phosphate and dye contaminants, which are often present in industrial and municipal wastewater, were eliminated by adsorption process. Fourier transform infrared (FTIR), x‐ray fluorescence (XRF), Zeta potential, and scanning electron microscope (SEM) with energy dispersive x‐ray (EDX) spectroscopy were used to analyze tomato stems. The tomato stems resulted in high pollutants removal efficiencies recording 99.31% of phosphate () removal efficiency and 99.44% of Direct Orange 46 (DO 46) dye removal efficiency at optimal conditions. The best conditions for phosphate adsorption were pH = 6.0, 2.0 g/L of tomato stems concentration, 50 mg/L initial phosphate concentration and a contact time of 120 min resulting in an adsorption capacity of 4.24 mg/g. The best conditions for DO 46 adsorption were pH = 12, 2.0 g/L of adsorbent concentration, initial dye of 200 mg/L concentration and a contact time of 120 min (q = 13.76 mg/g). For both adsorption experiments, the adsorbent size was chosen to be less than 500 μm. As a result of the adsorption experiments on tomato stem ash, Freundlich isotherm (R2: 0.94) was suitable for DO 46 dye adsorption and Temkin isotherm (R2: 0.99) was suitable for elimination. The phosphate (R2: 0.97) and dye (R2: 1) adsorption onto tomato stem ash was explained using a pseudo‐second‐order kinetic model. It has been determined that the adsorption of the DO 46 dye with the tomato stem ash is an exothermic (∆H: −3.174) process that occurs naturally due to its nature (∆G: −8.41). On the other hand, it was determined that the adsorption of was spontaneous (∆G: −5.21) and endothermic (∆H: 5.7357). According to the adsorption results obtained in this study, it is appropriate to use the tomato stem, which is generated as waste, as an adsorbent. It is thought that obtaining from bio‐based waste in the removal of pollutants such as dye and phosphate in water will both reduce the cost and create an advantage in terms of biodegradability.

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Section: Introductionmentioning

confidence: 99%