scholarly journals Research Progress on Chemical Modification and Application of Cellulose: A Review

2021 ◽  
pp. X
Author(s):  
Jinjie ZHANG ◽  
Yingping QI ◽  
Yongfeng SHEN ◽  
Hua LI
Keyword(s):  
Wastewater Treatment ◽  
Chemical Modification ◽  
Functional Groups ◽  
Polymer Material ◽  
Research Progress ◽  
Cellulose Derivatives ◽  
Natural Polymer ◽  
Environmental Friendliness ◽  
Grafting Modification ◽  
Good Biocompatibility

Cellulose is a rich natural polymer material, which has the characteristics of biodegradability, environmental friendliness and good biocompatibility. However, compared with conventional materials, there are some shortcomings in performance, such as intolerance corrosion, limited strength and so on. The chemical modification of cellulose not only retains its own excellent characteristics, but also introduces functional groups to endow it with specific properties. The chemical modification and utilization of cellulose has been the focus of research. In this paper, the latest advances in chemical modification of cellulose, such as esterification, etherification and grafting modification, are introduced. The research and application results of cellulose derivatives in food, wastewater treatment, medicine and papermaking in recent years are reviewed.

Research Progress in Cellulose Extraction, Modification and Application

2016 ◽  
Vol 852 ◽  
pp. 1194-1200 ◽  
Author(s):  
Chao Liu ◽  
Zhi Tan ◽  
Hui Min Li ◽  
Zhi Wei Xie ◽  
Jin Ping Peng ◽  
...  
Keyword(s):  
Chemical Modification ◽  
Recent Progress ◽  
Research Progress ◽  
Cellulose Derivatives ◽  
Cellulose Modification ◽  
Urgent Task ◽  
Fossil Resource ◽  
Carbon Resource ◽  
Modified Cellulose ◽  
Research Hotspots

As the fossil resource supply situation become more serious and the increasingly serious environment problems, the development of new carbon resource utilization has become an urgent task. Plant cellulose is the most abundant natural resource, which is renewable, nontoxic and degradable, has been paid much attrition by researchers of many countries. This paper reviews recent progress in plant cellulose extract and modification, especially in chemical modification of cellulose derivatives. And the article described cellulose modification technology about pretreatment. The applications of modified cellulose in the field of environmental protection, pharmaceutical, paint and other industries introduced as well. Finally, the current research hotspots of cellulose modification technology were prospected.

Research Progress of Natural Polymers in Wastewater Treatment

2019 ◽  
Vol 16 (4) ◽  
pp. 335-344 ◽  
Author(s):  
Xiang Li ◽  
Baojun Yang ◽  
Li Feng ◽  
Huaili Zheng ◽  
Guoming Zeng ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Environmental Protection ◽  
Environmental Awareness ◽  
Environmental Engineering ◽  
Research Progress ◽  
Future Trends ◽  
Natural Polymers

With the development of industry, urbanization, increasingly stringent environmental protection requirements, and strengthening of people’s environmental awareness, green treatment of pollutants has become a research hotspot in the field of environmental protection. Accordingly, the study on natural non-toxic polymers has received increasing attention from researchers. This paper aims to provide the present research progress of natural polymers in environmental engineering, including the striking characteristics and modification methods of the most well-known natural polymers, as well as their applications in environmental protection field. Concluding remarks and future trends are also pointed out.

scholarly journals Preparation and Characterization of Chemically-Modified Biomaterials and Their Application as Adsorbents of Penicillin G

2018 ◽  
Vol 1 (1) ◽  
pp. 114-124 ◽  
Author(s):  
Jesie Silva ◽  
Lizebel Morante ◽  
Tesfamichael Demeke ◽  
Jacqueline Baah-Twum ◽  
Abel Navarro
Keyword(s):  
Chemical Modification ◽  
Functional Groups ◽  
Negative Impact ◽  
Ph Dependence ◽  
Sem Analysis ◽  
Penicillin G ◽  
Tea Leaves ◽  
Reaction Conditions ◽  
Spent Tea Leaves

The prevalence of antibiotics in water creates microbial resistance and has a negative impact on the ecosystem. Biomaterials such as spent tea leaves are rich in functional groups and are suitable for chemical modification for diverse applications. This research proposes the use of spent tea leaves of chamomile (CM), green tea (GT), and peppermint (PM) as structural scaffolds for the incorporation of carboxyl, sulfonyl, and thiol groups to improve the adsorption of Penicillin G (Pe). Adsorbents characterization reported a higher number of acidic functional groups, mainly in thiolated products. Scanning electron microscopy (SEM) analysis showed changes on the surfaces of the adsorbents due to reaction conditions, with a stronger effect on thiolated and sulfonated adsorbents. Elemental analysis by Energy dispersive X-ray spectrophotometry (EDS) corroborated the chemical modification by the presence of sulfur atoms and the increase in oxygen/carbon ratios. Batch experiments at different pH shows a strong pH-dependence with a high adsorption at pH 8 for all the adsorbents. The adsorption follows the trend CMs > GTs > PMs. Thiolation and sulfonation reported higher adsorptions, which is most likely due to the sulfur bridge formation, reaching adsorption percentages of 25%. These results create a new mindset in the use of spent tea leaves and their chemical modifications for the bioremediation of antibiotics.

Marine polysaccharides: green and recyclable resources as wound dressings

2021 ◽  
Author(s):  
Xiaodong Jing ◽  
Yanzhen Sun ◽  
Xiaoli Ma ◽  
Hao Hu
Keyword(s):  
Renewable Resource ◽  
Wound Dressings ◽  
Environmental Friendliness ◽  
Good Biocompatibility ◽  
Recyclable Resources ◽  
Absolute Advantage

As a green and renewable resource, marine polysaccharides have inherent nontoxicity, good biocompatibility, biodegradability, and environmental friendliness. Compared to land-based polysaccharides, marine polysaccharides occupy an absolute advantage in the process...

Analysis and Application of Oxalic Acid Modified Sodium Silicate Binder

2012 ◽  
Vol 573-574 ◽  
pp. 31-34
Author(s):  
Li Ge Wang ◽  
Fan Zhang ◽  
Yang Zhang ◽  
Long Zhou ◽  
En Ze Wang
Keyword(s):  
Compressive Strength ◽  
Oxalic Acid ◽  
Chemical Modification ◽  
Functional Groups ◽  
Sodium Silicate ◽  
Bonding Strength ◽  
Colloidal Particle ◽  
Particle Surface ◽  
Growing Up ◽  
New Type

A new type of pellet binder was prepared with oxalic acid as sodium silicate chemical modification agent in this paper, the compressive strength of which improved obviously. It improved from 0.6 KN/a to 2.4 KN/a, when the amount of oxalic acid is 8%. Meanwhile, carboxyl introduced at 390°C started carbonization decomposition, and pelletizing properties wouldn't be affected without new pellet impurity. The analysis shows that adding oxalic acid introduces carboxyl only in the binder, but doesn't generate new functional groups; Polymer layer formed by carboxyl adsorption on sodium silicate gel particle surface limits colloidal particle growing up, and plays roles of refining colloidal particle and improving the bonding strength.

Research Progress on Wastewater Treatment by Heavy Metal Ion Imprinted Polymer

2018 ◽  
Vol 921 ◽  
pp. 35-39 ◽  
Author(s):  
Qin Tao Yang ◽  
Qing Lin Xie ◽  
Nan Chun Chen ◽  
Yi Jian Zhong
Keyword(s):  
Heavy Metal ◽  
Wastewater Treatment ◽  
Metal Ion ◽  
Heavy Metal Ion ◽  
Research Progress ◽  
Ion Imprinted ◽  
Ion Imprinted Polymers ◽  
Development Direction ◽  
Research Problems ◽  
Ion Imprinting

Owing to the efficient predetermination, specific recognition and wide applicability, metal ion imprinting technology, apply to the wastewater treatment. The principles, synthesis strategies of ion imprinting and typical heavy metal ion imprinted polymers (IIPs) are introduced in the review. Finally, it is pointed out that the futures research problems to be solved and the development direction of metal ion imprinting technology.

scholarly journals Research on System Optimizing of AAO-BAF Wastewater Treatment Process

2018 ◽  
Vol 53 ◽  
pp. 04028
Author(s):  
Shoubin Zhang ◽  
Wei Sun ◽  
Wenhai Jiao ◽  
Liping Qiu ◽  
Jingxiu Zhong ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Electron Acceptor ◽  
Phosphorus Removal ◽  
Treatment Process ◽  
Treatment System ◽  
Research Progress ◽  
Combined Processes ◽  
Wastewater Treatment Process ◽  
Combined Process ◽  
Wastewater Treatment System

To meet the more strict discharging standard, some combined processes have emerged to realize denitrification and phosphorus removal of wastewater more efficiently. Among them, AAO-BAF combined process was an efficient one. The AAO-BAF system was composed of AAO reactor and BAF. The AAO process was the main unit to complete phosphorus removal and denitrification. The BAF process, external nitrification unit, was mainly used to provide enough electron acceptor for denitrifying bacteria in AAO reactor, which could enhance the efficiency of denitrification of the whole system. So the system optimizing was essential to AAO-BAF combined process. In this paper, the research progress of AAO-BAF wastewater treatment system was summarized and some system optimizing methods were raised too.

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