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(searched for: doi:10.1016/j.carbpol.2021.118044)
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Nga H.N. Do, Binh Y. Truong, Phuong T.X. Nguyen, Kien A. Le, Hai M. Duong,
Published: 25 November 2021
Separation and Purification Technology; https://doi.org/10.1016/j.seppur.2021.120200

The publisher has not yet granted permission to display this abstract.
Kanhaya Lal, Garima Prajapat, Uma Rathore, Bhojak N.
Asian Journal of Research in Chemistry, Volume 14, pp 471-478; https://doi.org/10.52711/0974-4150.2021.00082

Abstract:
Wide ranges of low cost adsorbents were used to remove hazardous metal in aqueous solution and wastewater. The low cost adsorbents were usually collected from agricultural waste, seafood waste, food waste, industrial by-product and soil. These adsorbents are readily available in a copious amount. Some of the natural adsorbents appeared as good heavy metal removal, while some were not and require further modifications and improvements to enhance the adsorption capacity. Currently, heavy metals exist in most of the industrial wastewaters and water supplies are among the most severe environmental contaminants. Numerous research works have been conducted in this field, this review includes few potential solution containing papers.
, Mohammed El Khomri, Zahra Goodarzvand Chegini, Amal Bouich, Abdellah Dbik, Safae Bentahar, Najoua Labjar, Munawar Iqbal, Amane Jada, Abdellah Lacherai
Nanotechnology for Environmental Engineering, Volume 7, pp 1-15; https://doi.org/10.1007/s41204-021-00173-6

The publisher has not yet granted permission to display this abstract.
Zhouquan Sun, , Hong Xu, Bijia Wang, Linping Zhang, Xiaofeng Sui, ,
Published: 10 November 2021
RSC Advances, Volume 11, pp 36554-36563; https://doi.org/10.1039/d1ra06876h

Abstract:
CuS nanoparticles were grown in situ on 3D porous cellulose macrospheres for an excellent rapid cycling removal of organic dyes.
Ming Zhang, Yanhua Shi, Ruijian Wang, Kun Chen, Ningyu Zhou, Qingfeng Yang,
Journal of Environmental Chemical Engineering, Volume 9; https://doi.org/10.1016/j.jece.2021.106728

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Ziyan Yan, Bin Lin, , Jijiang Hu
Published: 26 October 2021
ACS Omega, Volume 6, pp 29588-29595; https://doi.org/10.1021/acsomega.1c03782

Abstract:
In this paper, cellulose chitosan composite aerogels were prepared through sol–gel and freeze-drying processes. The porous morphology of the aerogels was controlled by adjusting the cellulose concentration. Within a certain range, as the concentration of cellulose increases, the pore diameter of the composite aerogel becomes smaller and the pore structure becomes denser. The cellulose–chitosan composite aerogel can successfully separate the oil–water mixture without asphalt and showed stable filtration performance. The filtration speed is basically unchanged after a slight decrease and can be maintained at about 90% of the initial filtration speed within 30 min. The filtration speed can reach up to 9315 kg·h–1·m–2. When filtering bituminous oil–water mixtures, the filtration rate decreased significantly, with a 50% drop in 30 min. After adding the asphalt stabilizer poly(styrene-alt-octadecyl maleimide) (SNODMI), which is made in our laboratory, the effect of aerogel filtering the asphalt-containing oil–water mixture is obviously improved, and the downward trend of filtration speed is obviously improved. The combination of SNODMI and cellulose–chitosan has great application potential in the field of asphalt-containing oil–water separation.
Natalia Fijoł, Andrea Aguilar-Sánchez,
Published: 16 October 2021
Chemical Engineering Journal, Volume 430; https://doi.org/10.1016/j.cej.2021.132964

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Yi Liu, Hongying Fan, Xuan Wang, Jian Zhang, Wenting Li,
Published: 16 October 2021
Carbohydrate Polymers, Volume 276; https://doi.org/10.1016/j.carbpol.2021.118763

The publisher has not yet granted permission to display this abstract.
Ruixue Xue, Fangwai Wang, Yizhao Ge, Yujie Ma, Xiang He,
Published: 1 October 2021
ChemistrySelect, Volume 6, pp 9941-9950; https://doi.org/10.1002/slct.202102478

The publisher has not yet granted permission to display this abstract.
Lingyuan Wang, , Weiyin Su
Published: 30 September 2021
Carbohydrate Polymers, Volume 275; https://doi.org/10.1016/j.carbpol.2021.118710

The publisher has not yet granted permission to display this abstract.
Natalia Fijoł, Hani Nasser Abdelhamid, Binsi Pillai, Stephen A. Hall, Nebu Thomas,
Published: 27 September 2021
RSC Advances, Volume 11, pp 32408-32418; https://doi.org/10.1039/d1ra05202k

Abstract:
Water purification filters based on polylactic acid functionalised with hydroxyapatite were prepared by solvent-assisted blending and thermally induced phase separation (TIPS), extruded into filaments and processed via three-dimensional (3D) printing.
Published: 18 September 2021
by MDPI
Materials, Volume 14; https://doi.org/10.3390/ma14185398

Abstract:
In the field of industrial wastewater treatment, membrane separation technology, as an emerging separation technology, compared with traditional separation technology such as precipitation, adsorption, and ion exchange, has advantages in separation efficiency, low energy consumption, low cost, simple operation, and no secondary pollution. The application has been expanding in recent years, but membrane fouling and other problems have seriously restricted the development of membrane technology. Natural cellulose is one of the most abundant resources in nature. In addition, nanocellulose has characteristics of high strength and specific surface area, surface activity groups, as well as being pollution-free and renewable, giving it a very wide development prospect in many fields, including membrane separation technology. This paper reviews the current status of nanocellulose filtration membrane, combs the widespread types of nanocellulose and its derivatives, and summarizes the current application of cellulose in membrane separation. In addition, for the purpose of nanocellulose filtration membrane in wastewater treatment, nanocellulose membranes are divided into two categories according to the role in filtration membrane: the application of nanocellulose as membrane matrix material and as a modified additive in composite membrane in wastewater treatment. Finally, the advantages and disadvantages of inorganic ceramic filtrations and nanocellulose filtrations are compared, and the application trend of nanocellulose in the filtration membrane direction is summarized and discussed.
Published: 10 September 2021
Carbohydrate Polymers, Volume 274; https://doi.org/10.1016/j.carbpol.2021.118657

Abstract:
Whatman® cellulosic filter paper was used as a substrate for the synthesis of two zeolitic imidazolate frameworks (ZIFs); ZIF-8 and ZIF-67 with and without 2,2,6,6-tetramethyl-1-piperidine oxoammonium salt (TEMPO)-oxidized cellulose nanofibril (TOCNF). All synthesis procedures take place at room temperature via a one-pot procedure. The synthesis steps were followed using X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier transforms infrared (FT-IR). Data indicated the formation of metal oxide that converted to a pure phase of ZIFs after the addition of the organic linker i.e. 2-methyl imidazole (Hmim). The materials were characterized using XRD, FT-IR, SEM, energy dispersive X-ray (EDX), nitrogen adsorption-desorption isotherms, and X-ray photoelectron microscope (XPS). Data analysis confirms the synthesis of ZIFs into Whatman® filter paper. The materials were used for the reduction of pollutants such as 4-nitrophenol (4-NP) compound to 4-aminophenol (4-AP). The materials exhibit high potential for water treatment and may open new exploration for hybrid materials consisting of cellulose and ZIFs.
Yuru Yang, Lei Zeng, Zongkun Lin, Huabin Jiang,
Published: 1 September 2021
Carbohydrate Polymers, Volume 274; https://doi.org/10.1016/j.carbpol.2021.118622

The publisher has not yet granted permission to display this abstract.
Published: 20 August 2021
Chemical Engineering Journal, Volume 426; https://doi.org/10.1016/j.cej.2021.131733

Abstract:
The crystal growth of zeolitic imidazolate frameworks (ZIFs) on biopolymers such as cellulose is a promising method for obtaining hybrid materials that combinenatural and synthetic materials. Cellulose derivative viz. 2,2,6,6‐tetramethylpiperidine‐1‐oxylradical (TEMPO)-mediated oxidized nanocellulose (TOCNF) was used to modulate the crystal growth of ZIF-8 (denoted as CelloZIF-8) and ZIF-L (CelloZIF-L). The synthesis procedure occurred in water at room temperature with and without NaOH. The reaction parameters such as the sequence of the chemical's addition and reactant molar ratio were investigated. The phases formed during the crystal growth were monitored. The data analysis ensured the presence of zinc hydroxide nitrate nanosheets modified TOCNF during the crystallization of CelloZIFs. These phases were converted to pure phases ofCelloZIF-8 and CelloZIF-L. The resultant CelloZIFs materials were used for the adsorption ofcarbon dioxide (CO2), metal ions, and dyes. The materials exhibited high selectivity with reasonable efficiency (100%) toward the adsorption of anionic dyes such as methyl blue (MeB). They can also be used as a catalyst for dye degradation via hydrogenation with an efficiency of 100%. CelloZIF crystals can be loaded into a filter paper for simple, fast, and selective adsorption of MeB from a dye mixture. The materials are recyclable for five cycles without significant loss of their performance. The mechanisms of adsorption and catalysis were also investigated.
Published: 5 July 2021
by MDPI
Nanomaterials, Volume 11; https://doi.org/10.3390/nano11071752

Abstract:
This article presents a comparative study of the surface characteristics and water purification performance of commercially available cellulose nonwoven fabrics modified, via cast coating, with different nano-dimensioned bio-based carbohydrate polymers, viz. cellulose nanocrystals (CNC), TEMPO-oxidized cellulose nanofibers (T-CNF), and chitin nanocrystals (ChNC). The surface-modified nonwoven fabrics showed an improvement in wettability, surface charge modification, and a slight decrease of maximum pore size. The modification improved the water permeance in most of the cases, enhanced the particle separation performance in a wide range of sizes, upgraded the mechanical properties in dry conditions, and showed abiotic antifouling capability against proteins. In addition, T-CNF and ChNC coatings proved to be harmful to the bacteria colonizing on the membranes. This simple surface impregnation approach based on green nanotechnology resulted in highly efficient and fully bio-based high-flux water filtration membranes based on commercially available nonwoven fabrics, with distinct performance for particle rejection, antifouling and antibacterial properties.
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