Experimental and modeling study on adsorption of cationic methylene blue dye onto mesoporous biochars prepared from agrowaste

Babaei, Ali Akbar; Alavi, Nadali; Akbarifar, Mitra; Ahmadi, K.; Esfahani, Amirhosein Ramazanpour; Kakavandi, Babak

doi:10.1080/19443994.2016.1163736

Cited by 74 publications

(21 citation statements)

References 57 publications

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“…Currently, several physical or chemical processes have been used to treat water contaminated with dyes, including coagulation–flocculation, membrane filtration, adsorption, ion exchange, and heterogeneous catalytic and electrochemical processes (Babaeia et al, 2016; Boutra & Trari, 2017; Davis, Gainer, O'Neal, & Wu, 1994; Kakavandi, Takdastan, Pourfadakari, Ahmadmoazzam, & Jorfi, 2019; Mansouriieh, Reza Sohrabi, Pouramir Vajargah, & Roudbaraki, 2017). Biological processes are also very effective methods for removing organic pollutants.…”

Section: Introductionmentioning

confidence: 99%

Optimization of photocatalytic degradation of rhodamine B using Box–Behnken experimental design: Mineralization and mechanism

Madjene

Assassi

Chokri

et al. 2020

Water Environment Research

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The aim of this work was to optimize the photocatalytic degradation of rhodamine B (RhB) using a four-factor Box-Behnken experimental design, and the study was carried out under artificial irradiation (24-W UV lamp) using ZnO in suspension. The Box-Behnken model has been validated with an error less than 5%. A total (100%) RhB removal and COD abatement rates were reached under optimal conditions of treatment time, ZnO dose, and stirring speed at different concentrations of dye. The study of the effect of irradiation type (solar and UV lamp) on the degradation of RhB showed that solar irradiation gave a better rate of degradation with complete discoloration after 2 hr. The study of RhB degradation mechanism indicates that O •− 2 were the main active species for the degradation of this pollutant. The comparison between the degradation of RhB alone and RhB prepared with varnish (as it is usually used in industry) revealed that degradation of RhB alone is faster comparing than that of RhB/varnish mixture. The results showed that the biodegradability was improved after a contact time of 60 min with a BOD 5 /COD ratio increasing from 0.23 to 0.90. © 2020 Water Environment Federation • Practitioner points • Optimization of the photocatalytic degradation of rhodamine B using a four-factor Box-Behnken experimental design. • Investigation of dye mineralization. • The degradation mechanism of rhodamine. • Biodegradability assessment based on the BOD 5 /COD ratio.

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Section: Introductionmentioning

confidence: 99%

Optimization of photocatalytic degradation of rhodamine B using Box–Behnken experimental design: Mineralization and mechanism

Madjene

Assassi

Chokri

et al. 2020

Water Environment Research

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“…From Fig.9. (c, d) * it can be seen that by increasing the pH of the solution, the removal e ciency increases and increasing the pH of the solution increases the number of hydroxyl groups, which increases the number of active sites with a negative charge between the pharmaceutical and the adsorbent surface [55,56].…”

Section: Effect Phmentioning

confidence: 99%

Synthesis and Characterization of Chitosan/Agar/SiO2 Nano Hydrogels For Removal of Amoxicillin and of Naproxen From Pharmaceutical Contaminants

Moradi¹,

Mhdavi²,

Sedaghat³

2021

Preprint

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Today, environmental pollutants pose a threat to human societies and all living organisms, which is why they have attracted the attention of environmental researchers. In this study, in order to remove pharmaceutical contaminants Naproxen and Amoxicillin from aqueous media with SiO2 nanoparticles based on Agar and Chitosan was investigated. The study of structural properties, physical and chemical characterization of synthesized nanocomposite was investigated by FTIR, XRD, TEM, FE-SEM, DLS and EDX analyzes. In addition, the role of parameters affecting the removal of pharmaceutical contaminants such as solution pH, contact time, contaminant concentration and temperature were studied. Nanocomposites prepared from Agar and Chitosan showed good performance in absorbing naproxen and amoxicillin. According to the studies performed to remove naproxen, the max adsorption efficiency was obtained at a concentration of 20 mg/l with an absorbent dose of 0.05 g and a pH of 8 and at an optimum temperature of 25 °C and 99% in 15 min. Also, for amoxicillin with nanocomposite prepared with an initial concentration of 20 mg/l and an adsorbent dose of 0.05 g, a time of 10 min, a temperature of 25 °C and a pH of 8, the max removal efficiency of 91.15% was obtained.

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“…Ngành dệt nhuộm sử du ̣ng rất nhiêù nhoḿ thuôć nhuô ̣m nhân tạo gốc Azo như methylene blue (MB) [1,2]. Thuốc nhuộm nói chung không chỉ gây maù cho nước thaỉ, mà coǹ là tać nhân ô nhiễm cho con người và môi trường [1,3]. Trong đó, MB là một hợp chất dị vòng tạo màu xanh lam trong nước và thường được sử dụng trong công nghiệp dệt nhuộm và trong lĩnh vực dược phẩm.…”

Section: Mở đầU *unclassified

“…TSH là vâ ̣t liê ̣u cacbon chi phí thâṕ, có tiêm năng lớn trong hâṕ phu ̣ thuốc nhuô ̣m từ môi trường nước. Mô ̣t số nghiên cứu trước đây đã sử du ̣ng TSH cho loa ̣i bỏ MB trong môi trường nước [8][9][10][11] và nhiều loại sinh khối được sử dụng để chế tạo TSH như gỗ sồi [3], bả mía [6], phân heo [11], phân gà [12], bùn thải [13], và cây thân cỏ [14]. Năng lực hấp phụ MB cực đại từ các nghiên cứu cho thấy có sự khác nhau lớn giữa các loại TSH, ví dụ: hấp phụ cực đại đạt 1,623 mg/g của TSH từ thực vật [8], 33 mg/g của TSH từ bùn thải [15], và 7,2 mg/g của TSH từ chất thải [16].…”

Section: Mở đầU *unclassified

Study on Adsorption of Methylene Blue from Aqueous Solution by Biochar Derived from Mimosa Pigra Plant

Cường

2021

EES

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Biochar from mimosa pigra was studied to remove methylene blue (MB) from aqueous solution. The properties of biochars were determined using Fourier Transform Infrared, scanning electron microscope, and Brunauer–Emmett–Teller. The biochar achieved the yield of 24.62 % at 500 oC pyrolysis. The specific surface area of the biochar is 285.53 m2/g, the total pore size is 0.153 cm3/g and the ash content is 2.79%. The optimal dose of removing MB of the biochar is 5 g/L and the optimal pH is 2 - 10. MB removal reached over 80% in the first 30 min, followed by a stable period of 120 to 360 min reaching over 90% of removal. Maximum adsorption capacity reached 20.18 mg/g at 25 oC. MB adsorption data is suitable for kinetic models in order: Avrami > Elovich > PSO > PFO. The adsorption process may comprise physical and chemical adsorption andmultiple stages.

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Experimental and modeling study on adsorption of cationic methylene blue dye onto mesoporous biochars prepared from agrowaste

Cited by 74 publications

References 57 publications

Optimization of photocatalytic degradation of rhodamine B using Box–Behnken experimental design: Mineralization and mechanism

Optimization of photocatalytic degradation of rhodamine B using Box–Behnken experimental design: Mineralization and mechanism

Synthesis and Characterization of Chitosan/Agar/SiO2 Nano Hydrogels For Removal of Amoxicillin and of Naproxen From Pharmaceutical Contaminants

Study on Adsorption of Methylene Blue from Aqueous Solution by Biochar Derived from Mimosa Pigra Plant

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