Comparison of activated carbon and iron/cerium modified activated carbon to remove methylene blue from wastewater

Cheng, Song; Zhang, Libo; Ma, Aiyuan; Xia, Hongying; Peng, Jinhui; Li, Chunyang; Shu, Jianhua

doi:10.1016/j.jes.2016.12.027

Cited by 107 publications

(38 citation statements)

References 58 publications

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“…According to the International Union of Pure and Applied Chemistry (IUPAC), the shapes of the isotherms are of type I and II. At low relative pressures (p/p0 < 0.1), large volumes of N2 were adsorbed for both samples [28]. The quantity adsorbed of N2 at p/p0 ~ 1 varies between 350 and 758 cm 3 •g -1 .…”

Section: Optimization Of Textural and Morphological Properties By Facmentioning

confidence: 93%

Extraction of Polyphenols and Synthesis of New Activated Carbon from Spent Coffee Grounds

Ramón-Gonçalves¹,

Alcaraz²,

Ferreras³

et al. 2019

Preprint

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A valorization process of spent coffee grounds (SCG) was studied. Thus, a two-stage process, a stage of extraction of the polyphenols and a stage of obtaining activated carbon (AC) by a carbonization process, was performed. The extraction was carried out with a hydro-alcoholic solution in a pressure reactor, modifying time and temperature. To optimize the extraction of polyphenols, a two-level factorial design with three replications at the central values was used. The best results were obtained by performing the extraction at 80 °C during 30 min, using a mixture of EtOH:H2O 1:1 (v/v) as extraction solution. Caffeine and chlorogenic acid were the most abundant compounds in the analyzed extracts, ranging from 0.09 to 4.8 mg∙g-1 and 0.06 to 9.7 mg∙g-1, respectively. The precursor obtained in the extraction stage were transformed into AC. An experimental design was realized in order to analyze the influence of different variables in the AC obtained process (reaction time and amount of potassium hydroxide used). Actived carbons with BET specific surface (SBET) comprised between 1600 m2∙g-1 and 2330 m2∙g-1 had a microporous surface. Under the optimum conditions, the obtained AC presented a maximum adsorption capacity of methylene blue (qm) between 411 mg∙g-1 and 813 mg∙g-1.

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Section: Optimization Of Textural and Morphological Properties By Facmentioning

confidence: 93%

Extraction of Polyphenols and Synthesis of New Activated Carbon from Spent Coffee Grounds

Ramón-Gonçalves¹,

Alcaraz²,

Ferreras³

et al. 2019

Preprint

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show abstract

“…This solution was then filtered through activated carbon, producing a clear, colourless filtrate. [21][22][23] Following literature procedures, H 4 [SiW 12 O 40 ] was then isolated from this solution by extraction with diethyl ether and subsequent addition of a mineral acid (in this case concentrated HCl). 24 Crystals of pure H 4 [SiW 12 O 40 ] were then collected from this extract (see full details in the ESI † and CHN analyses of fresh and recycled H 4 [SiW 12 O 40 ] in Table S1).…”

mentioning

confidence: 99%

Selective hydrogenation of nitroarenes using an electrogenerated polyoxometalate redox mediator

et al. 2018

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“…Among them activated carbon has been acknowledged as potential absorbent and catalyst for the removal of organic compounds from wastewater. It is widely used in many industries due to its abundant porous structure, chemical inertness, tenable texture and high-temperature stability [15][16][17][18]. Similarly, the rice husk which is the residue of a rice-milling process act as an effective adsorbent for heavy metals and dyes due to a high proportion of cellulose containing several hydroxy functional groups [19,20].…”

Section: Introductionmentioning

confidence: 99%

Combined ozonation and adsorption system for the removal of heavy metals from municipal wastewater: effect of COD removal

Ikhlaq¹,

Aslam²,

Zafar³

et al. 2019

Desalination and Water Treatment

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Heavy metals like copper, chromium, cadmium, lead, and zinc are key contaminants of freshwater reservoirs because of their deadly, non-biodegradable, and persistent nature. The work involves the comparison of various single and combined processes such as ozonation (Ozo), adsorption on activated carbon (AC), adsorption on rice husk (RH), ozonation in the presence of rice husk (Ozo/RH) and ozonation in the presence of activated carbon (Ozo/AC) for the removal of chemical oxygen demand (COD) and heavy metals from the municipal wastewater. Various factors such as adsorbent dose reaction time and synchronizing effect of COD removal on the removal efficiency of heavy metals was studied. The maximum removal of both COD and heavy metals was achieved by ozonation in the presence of activated carbon (Ozo/AC) combined process. The results further reveal that COD removal efficiencies have a positive synchronizing impact on the removal efficiencies of heavy metals. It is therefore concluded that (Ozo/AC) combined process may be used for the removal of heavy metals in wastewater.

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Comparison of activated carbon and iron/cerium modified activated carbon to remove methylene blue from wastewater

Cited by 107 publications

References 58 publications

Extraction of Polyphenols and Synthesis of New Activated Carbon from Spent Coffee Grounds

Extraction of Polyphenols and Synthesis of New Activated Carbon from Spent Coffee Grounds

Selective hydrogenation of nitroarenes using an electrogenerated polyoxometalate redox mediator

Combined ozonation and adsorption system for the removal of heavy metals from municipal wastewater: effect of COD removal

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