Cellulose/carbon Composites and their Applications in Water Treatment – a Review

Dong, Yu-Dan; Zhang, Heng; Zhong, Gan‐Ji; Yao, Gang; Lai, Bo

doi:10.1016/j.cej.2020.126980

Cited by 143 publications

(45 citation statements)

References 159 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The hydrogel is formed in this step because a large amount of solvent is removed, and the coherent network structure of crosslinked polymer is synthesized. For instance, the removal of solvent from cellulose gel in a cylindrical mold has been performed in an incubator maintained at 70 °C under a heating rate of 3 °C/min for 120 min to obtain the crosslinked product [ 18 ].…”

Section: Preparation Of Porous Polysaccharidesmentioning

confidence: 99%

“…The purpose of crosslinking is to improve the final mechanical properties of the aerogel [ 49 ]. For example, single cellulose is generally difficult to melt and dissolve due to its mixed crystalline and non-crystalline structure, molecular chain rigidity, and strong intra- and inter-molecular hydrogen bondings due to the –OH functional groups in the molecular chains [ 18 ]. Hence, the direct preparation of natural polysaccharide nanocrystals is difficult, except via layer-by-layer assembly [ 17 ].…”

Section: Preparation Of Porous Polysaccharidesmentioning

confidence: 99%

“…The density of an aerogel can be as low as 0.004–0.5 g/cm 3 with a high porosity of up to 99.8% and a large specific surface area of 100–1600 m 2 /g [ 11 ]. Due to these properties, the aerogels have been applied as adsorbents of CO 2 [ 12 , 13 , 14 , 15 , 16 ], dyes, and heavy metals [ 2 , 3 , 11 , 17 , 18 , 19 , 20 , 21 , 22 , 23 ], as tissue engineering and blood system scaffolds in the biomedical field [ 3 , 22 , 23 , 24 , 25 , 26 , 27 ], and as materials for thermal insulation [ 4 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 ] and food packaging [ 37 , 38 , 39 , 40 , 41 ]. These versatile materials also exhibit high optical transparencies, low thermal conductivities (down to 12 mW/mK) and low sound speeds [ 42 , 43 ].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Recent Progress in Polysaccharide Aerogels: Their Synthesis, Application, and Future Outlook

Muhammad¹,

Lee²,

Shin³

et al. 2021

Polymers

View full text Add to dashboard Cite

Porous polysaccharides have recently attracted attention due to their porosity, abundance, and excellent properties such as sustainability and biocompatibility, thereby resulting in their numerous applications. Recent years have seen a rise in the number of studies on the utilization of polysaccharides such as cellulose, chitosan, chitin, and starch as aerogels due to their unique performance for the fabrication of porous structures. The present review explores recent progress in porous polysaccharides, particularly cellulose and chitosan, including their synthesis, application, and future outlook. Since the synthetic process is an important aspect of aerogel formation, particularly during the drying step, the process is reviewed in some detail, and a comparison is drawn between the supercritical CO2 and freeze drying processes in order to understand the aerogel formation of porous polysaccharides. Finally, the current applications of polysaccharide aerogels in drug delivery, wastewater, wound dressing, and air filtration are explored, and the limitations and outlook of the porous aerogels are discussed with respect to their future commercialization.

show abstract

Section: Preparation Of Porous Polysaccharidesmentioning

confidence: 99%

Section: Preparation Of Porous Polysaccharidesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Recent Progress in Polysaccharide Aerogels: Their Synthesis, Application, and Future Outlook

Muhammad¹,

Lee²,

Shin³

et al. 2021

Polymers

View full text Add to dashboard Cite

show abstract

“…Therefore, there is an urgent need to develop an environmentally friendly and efficient material to remove excess Congo red in water to solve the current environmental problem [26], [27] . Table 1 After processing, the carbon composite material has a high specific surface area, a highly developed pore structure and surface activity [28], [29], [30] . These properties make it have extremely high adsorption performance.…”

Section: Introductionmentioning

confidence: 99%

Adsorption Behavior of Congo Red on Carbon Materials Based of Humic Acid

Wang

et al. 2021

Preprint

View full text Add to dashboard Cite

In this study, a carbon composite based on humic acid (CAH) was synthesized by partially carbonizing humic acid by using aluminum sulfate with a mass ratio of 2:3 and a leavening agent oxalic acid with a fixed mass. The morphology and microstructure of the sample are measured by scanning electron microscope (SEM), x-ray diffractometer (XRD), thermal analysis (TG-DSC), Raman spectroscopy (Raman), X-ray photoelectron spectroscopy (XPS) and Fourier Transform infrared spectroscopy (FT-IR) is used to analyze the composition and structure of materials. The BET surface area of CAH is determined to be 149 m²/g. Congo red was used as a model adsorbent for adsorption research. When the dye concentration is 400 mg/L and 10mg of adsorbent powder is used. CAH has the highest dye removal rate of adsorption capacity. The pseudo-first-order and pseudo-second-order kinetic models were used to describe the kinetic data and the Langmuir and Freundlich models were applied to describe the adsorption isotherms. The results showed that the equilibrium adsorption data were found to fit better to the Langmuir adsorption model and the kinetic process of adsorption could be described by the pseudo-second-order model. Compared with humic acid, CAH composite materials can effectively improve the adsorption rate and adsorption capacity of Congo red, and the adsorption capacity is as high as 3986mg/g within 30 minutes. In addition, considering the cost issue, this study selected low-cost humic acid as a carbon source to prepare composite materials, emphasizing the importance of cost.

show abstract

“…A celulose é largamente aplicada na formulação de fármacos, cosméticos, alimentos, produção de materiais isolantes e também no tratamento de efluentes, o que proporcionou o desenvolvimento de diversos estudos para obtenção e funcionalização (Dong et al, 2021). A celulose é considerada um excelente substituto aos polímeros sintéticos a base de petróleo, podendo ser extraída de diversas plantas e fibras, como por exemplo, o bagaço da cana-de-açúcar, sisal, palha de arroz e de pinheiros (Başaran Kankılıç & Metin, 2020b).…”

Section: Introductionunclassified

Celulose (Mangifera indica) modificada por melamina-sílica aplicada no tratamento de efluentes com precipitação quimicamente assistida

Junior

Figueiredo

Santos

et al. 2021

RSD

View full text Add to dashboard Cite

Este trabalho objetivou desenvolver um compósito a base de celulose, melamina e sílica. A celulose foi obtida dos resíduos de poda da Mangifera indica para o tratamento primário quimicamente assistido de efluentes da indústria têxtil. O compósito foi caracterizado por FT-IR, MEV, MET, TG-DTG e Potencial Zeta. O planejamento composto central foi aplicado para otimização da massa de compósito e tempo de contato na remoção de azul de metileno. O FT-IR mostrou que o compósito apresentou a banda para a melamina em 815 cm-1. O MEV e MET revelaram que na superfície do compósito há Nitrogênio da melamina, Silício e Sódio oriundos do catalisador. O TG-DTG mostrou que o compósito é termicamente mais estável que a celulose, com 65% de degradação. Pelo potencial zeta, valores de pH acima de 5 propiciam maior estabilização e incremento do caráter aniônico do compósito. Escolheu-se como a melhor condição para a aplicação 60 mg de compósito e 30 minutos de tempo de contato, com remoção de 88,6 ± 3,5% do azul de metileno. O estudo do pH revelou que acima de 5, o compósito é mais eficiente. O processo de adsorção do corante pelo material apresentou-se coerente ao modelo de Langmuir (R2 = 0,9921). Assim, o compósito de celulose-melamina-sílica desenvolvido foi eficaz na remoção do corante azul de metileno, apresentando-se como um material de baixo custo, biodegradável e eficiente, com potencialidades para a aplicação no tratamento dos efluentes da indústria têxtil.

show abstract

Cellulose/carbon Composites and their Applications in Water Treatment – a Review

Cited by 143 publications

References 159 publications

Recent Progress in Polysaccharide Aerogels: Their Synthesis, Application, and Future Outlook

Recent Progress in Polysaccharide Aerogels: Their Synthesis, Application, and Future Outlook

Adsorption Behavior of Congo Red on Carbon Materials Based of Humic Acid

Celulose (Mangifera indica) modificada por melamina-sílica aplicada no tratamento de efluentes com precipitação quimicamente assistida

Contact Info

Product

Resources

About