Article
Metallurgy & Metallurgical Engineering
E. S. Alvim, R. M. Fernandes Lima
Summary: This paper presents the results of a study on selective flocculation/magnetic separation of iron ore slime from a mine in Brazil. The study evaluated the zeta potential of different minerals in the slime and the influence of reagents and flocculants on their surface properties. The aim was to establish conditions for the selective separation of iron-bearing minerals and gangue minerals. The results showed that starch was more effective in achieving higher Fe recovery compared to polyacrylamides.
MINERAL PROCESSING AND EXTRACTIVE METALLURGY REVIEW
(2023)
Article
Soil Science
Thadeu Rodrigues de Melo, Alex Figueiredo, Joao Tavares Filho
Summary: An increase in organic matter content can stabilize macmaggregates in soils, but it can also inhibit the flocculation of suspended clay. When water-stable macroaggregates break down, the released clay may have imbalanced charges, making flocculation unlikely.
SOIL & TILLAGE RESEARCH
(2021)
Review
Engineering, Chemical
Shifa M. R. Shaikh, Mohammad K. Hassan, Mustafa. S. Nasser, Sami Sayadi, Ahmad I. Ayesh, Vivek Vasagar
Summary: This paper provides an overview of the latest progress in harvesting microalgae suspensions using polyacrylamide flocculants, examining the impact of polyacrylamide characteristics on flocculation efficiencies and evaluating the effects of culture medium properties on polyacrylamide-induced flocculation. Existing pilot-scale and large-scale polyacrylamide-based flocculation studies are explored while identifying research gaps, key challenges, and future prospects for optimizing microalgae flocculation studies.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Chemistry, Physical
Dana I. M. Al-Risheq, Shifa M. R. Shaikh, Mustafa S. Nasser, Fares Almomani, Ibnelwaleed A. Hussein, Mohammad K. Hassan
Summary: This study examines the influence of a hybrid coagulation/flocculation process on highly stable bentonite suspension. The results show that cationic and anionic polyacrylamide (PAM) exhibit different flocculation behaviors in the presence of a natural deep eutectic solvent (NADES). The molecular weight and charge density of PAM have a significant impact on the flocculation efficiency of bentonite suspension.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Polymer Science
Gustavo P. Zago, Reinaldo Giudici, Joao B. P. Soares
Summary: Despite being widely used, polyacrylamide faces performance challenges in tailings treatment. This study compared the performance of two commercial polyacrylamides with different molecular weights to treat iron ore tailings with two polymers designed for oil sand tailings treatment. The higher molecular weight polyacrylamide performed better, but still fell short of desired solid-liquid separation efficiency. The new polymer flocculants outperformed commercially available polyacrylamides but retained high water content in the sediments. This comparison suggests the potential use of alternative polymers for iron ore tailings treatment.
Article
Engineering, Chemical
Subhadeep Chakraborty, Sonai Dutta, Rahul Chatterjee, Jagannath Chanda, Sagar Pal, Abhijit Bandyopadhyay
Summary: A decorated semi-synthetic flocculant derived from Xanthan gum has been synthesized and found to efficiently unsettle stable kaolin suspension at low concentration (0.25wt.%). The copolymer with the maximum extent of branching (70.5%) exhibited the fastest settling time and the lowest turbidity, especially at pH 7 and the isoelectric point.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2023)
Article
Environmental Sciences
Bin Du, Qian Tang, Wei Chen, Xiang Rong, Ke Zhang, Dandan Ma, Zhaolan Wei
Summary: To improve nanostructural stability and algal removal efficiency, a novel nanochitosan-grafted flocculant (PAD-g-MNC) with enhanced nanostructure and high molecular weight was synthesized. PAD-g-MNC exhibited superior algal and extracellular organic matter (EOM) removal, with turbidity and chlorophyll-a removal rates of 93.46%-95.39% and 95.10%-97.31%, respectively, at a dosage of 4-5 mg L-1. The growth rate, strength factor, and recovery factor of algal flocs flocculated by PAD-g-MNC were higher than other conventional flocculants. The results suggest that the branched nanostructure and high molecular weight of PAD-g-MNC promote the formation of stable flocs and enhance the regeneration ability of flocs.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Chemistry, Physical
Daniel V. Dixon, Joao B. P. Soares
Summary: This study investigates the effect of polyacrylamide dispersity on flocculation performance in a kaolinite clay system. It is found that lower dispersity polyacrylamides result in larger clay aggregates, and the low molecular weight fraction has less influence on aggregate size. These findings suggest that polymers with narrow molecular weight distributions can be used in lower dosages.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Chemistry, Applied
Khaled Mostafa, Mohamed Ramadan, Azza El-Sanabary
Summary: The purpose of this study was to compare the flocculation efficiency of the authors' previously prepared poly (methacrylamide)-chitosan nanoparticles (CNPs) graft copolymer with polyacrylamide as a synthetic flocculant. The results showed that the prepared copolymers had comparable flocculation efficiency with polyacrylamide and a higher grafting extent.
PIGMENT & RESIN TECHNOLOGY
(2023)
Article
Chemistry, Physical
Wencheng Xia, Yijiang Li, Feng Wu, Chenkai Niu
Summary: The flotation process of fine non-coking coal from kaolinite was improved by the addition of anionic polyacrylamide, which interacted with kaolinite and coal particles through hydrogen bonding. Anionic polyacrylamide selectively flocculated kaolinite particles, reducing kaolinite pollution in the froth and decreasing the amount of kaolinite particles coating the clean coal surface. Ultimately, the flotation selectivity was enhanced by anionic polyacrylamide pre-conditioning.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Environmental Sciences
Leen Labeeuw, Audrey S. Commault, Unnikrishnan Kuzhiumparambil, Benjamin Emmerton, Luong N. Nguyen, Long D. Nghiem, Peter J. Ralph
Summary: Flocculation is a cost-effective method for microalgae biomass harvesting, with the efficiency depending on the species involved. Polyacrylamide flocculants showed high efficiency in harvesting, but the impact on different algal species varied in terms of compromised cells and product release. The pilot-scale demonstration using polyacrylamide maintained high efficiency and biomass quality similar to laboratory-scale results, indicating its potential for industrial application without the need for pre-treatment.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Yuning Chen, Xuhao Li, Wang Zizeng, Li Feng, Jiehong Xie, Zeluan Lin, Zhihong Xu, Bingzhi Liu, Xiang Li, Huaili Zheng
Summary: The research successfully synthesized a new type of template copolymer with a distinct cationic microblock structure, which can effectively improve the flocculation structure and enhance treatment efficiency, leading to an improved sludge dewatering performance.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Environmental Sciences
Bing Guo, Jiachen Zeng, He Bai, Yuchi Hao, Xiaowei Yan, Sheng Wang
Summary: This study investigated the effect of cation polyacrylamide (CPAM) on the dewatering performance of dredged sludge and compared it with other organic and inorganic agents. The results showed that CPAM significantly improved the dewatering performance, reducing sludge resistance filtration and capillary adsorption time. Mechanism experiments revealed that CPAM achieved this by increasing sedimentation rate, accelerating organic matter dissolution, neutralizing sludge surface charge, and improving void structure. CPAM outperformed other agents in terms of dewatering performance.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Physical
Jian Zhang, Shengzhen Hou, Qi Zhang, Xiujun Wang, Pengyao Xing
Summary: This work demonstrates the role of amine-grafted inorganic clay minerals as an efficient supramolecular crosslinker for anionic polyacrylamide. The study investigates the control of ordered aggregation behavior of polymers using amino clay as a supramolecular crosslinker, offering a strategy for fabricating polymer-mineral composite materials.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Engineering, Chemical
Ziyong Chang, Chunbao Sun, Jue Kou, Guangqin Fu, Xiaoyue Qi
Summary: The study showed that polyacrylamide (PAM) has a significant impact on bauxite flotation, with high concentrations reducing recovery and selectivity. PAM may hinder collector adsorption and cause unselective flocculation. Hexametaphosphate can mitigate the negative effects of PAM and improve flotation performance.
MINERALS ENGINEERING
(2021)
Review
Chemistry, Applied
Xingran Kou, Dongdong Su, Fei Pan, Xiwei Xu, Qingran Meng, Qinfei Ke
Summary: This review provides a systematic discussion of the application of molecular dynamics (MD) simulations in aroma compounds (ACs)/cyclodextrins (CDs) inclusion complexes (ICs). It covers the establishment of the simulation process, parameter selection, model evaluation, and various application cases, summarizing the major achievements and challenges of this method.
CARBOHYDRATE POLYMERS
(2024)
Review
Chemistry, Applied
Haoyu Yu, Quanbin Zhang, Ammad Ahmad Farooqi, Jing Wang, Yang Yue, Lihua Geng, Ning Wu
Summary: Brown algae are rich in fucoidan, which has been found to have anti-cancer and anti-metastasis effects. Fucoidan inhibits tumor cell growth, proliferation, and metastasis, and also promotes immune responses in the tumor microenvironment.
CARBOHYDRATE POLYMERS
(2024)
Review
Chemistry, Applied
Liang Dong, Yanan Li, Hailin Cong, Bing Yu, Youqing Shen
Summary: Gene therapy is a revolutionary treatment that requires suitable vectors for protecting and releasing exogenous nucleic acids in target cells. Chitosan, as a non-viral vector, has gained attention due to its good biocompatibility and ability to load large amounts of nucleic acids. This paper summarizes the potential of chitosan and its derivatives as gene delivery vector materials, discusses factors influencing transfection efficiency, performance evaluation, ways to optimize infectious efficiency, and current research development directions. It also provides an outlook on the future prospects of chitosan.
CARBOHYDRATE POLYMERS
(2024)
Article
Chemistry, Applied
Ana Iglesias-Mejuto, Beatriz Magarinos, Tania Ferreira-Goncalves, Ricardo Starbird-Perez, Carmen Alvarez-Lorenzo, Catarina Pinto Reis, Ines Ardao, Carlos A. Garcia-Gonzalez
Summary: This study developed a novel processing strategy to manufacture drug-loaded and personalized aerogels with nanostructures. The aerogels demonstrated bioactivity and antimicrobial effects, promoting bone regeneration and preventing infections in bone tissue engineering.
CARBOHYDRATE POLYMERS
(2024)
Article
Chemistry, Applied
Zhenxu Shi, Dimei Yang, Yan Zhou, Xinyu Chen, Lin Gan, Jin Huang
Summary: This study proposes a micro-assembly method to improve the photoluminescent properties of crystalline cellulose nanocrystals (CNCs) by organizing them within a sub-micrometer-sized metal-organic framework and coating with TiO2. The TiO2 coating prevents CNC assembly breakdown and allows information to be revealed using screenprinted labels for anti-counterfeiting purposes.
CARBOHYDRATE POLYMERS
(2024)
Article
Chemistry, Applied
Xuejiao Liu, Bin Fu, Jierong Chen, Zhenyu Sun, Dongdong Zheng, Zhonghua Li, Bing Gu, Ying Zhang, Haojie Lu
Summary: Liver disease is a major cause of global mortality, and identifying biomarkers for diagnosing its progression is crucial for improving outcomes. Targeted mass spectrometry is a powerful tool for verifying biomarker candidates and clinical applications, particularly for glycoproteins translation. However, the limitation of analyzing only one sample per run has become apparent. In this study, a high-throughput intact N-glycopeptides quantification strategy was developed, allowing the validation of 20 samples per run with an average analysis time of 3 minutes per sample. The strategy was applied in a cohort of 461 serum samples and identified a panel of 10 IgG N-glycopeptides that have strong clinical utility in evaluating the severity of liver disease.
CARBOHYDRATE POLYMERS
(2024)
Article
Chemistry, Applied
Qian Wang, Hao Jiang, Hongli Zhang, Weiqiao Lu, Xiao Wang, Wenfeng Xu, Jia Li, Youjing Lv, Guoyun Li, Chao Cai, Guangli Yu
Summary: This study proposes a novel strategy of antibody-beta-glucan conjugates (AGC) to enhance the antitumor immune response to immune checkpoint blockade (ICB) therapy. AGC demonstrated powerful tumor suppression and promoted interaction between tumor cells and dendritic cells (DCs), thereby enhancing immunotherapeutic benefits.
CARBOHYDRATE POLYMERS
(2024)
Article
Chemistry, Applied
Chaeyeon Lee, Sojeong Lee, Sang Wook Kang
Summary: The study aims to enhance the properties of porous membranes by addressing the limitations associated with phase separation. By using cellulose acetate and citric acid, the researchers were able to fabricate membranes with improved mechanical strength and thermal stability. The cross-linking effect of citric acid resulted in a more uniform pore structure and higher porosity.
CARBOHYDRATE POLYMERS
(2024)
Review
Chemistry, Applied
Tejaswini Kolipaka, Giriraj Pandey, Noella Abraham, Dadi A. Srinivasarao, Rajeev Singh Raghuvanshi, P. S. Rajinikanth, Vidya Tickoo, Saurabh Srivastava
Summary: This review focuses on the design and application of polysaccharide-based hydrogel wound dressings, highlighting aspects such as biocompatibility, biodegradability, drug entrapment, moisturizing ability, swelling, and mechanical properties. Additionally, various crosslinking methods and recent developments in stimuli-responsive hydrogels are discussed.
CARBOHYDRATE POLYMERS
(2024)
Article
Chemistry, Applied
Anqi Xu, Nan Zhang, Shixing Su, Hongyu Shi, Daoqiang Lu, Xifeng Li, Xin Zhang, Xin Feng, Zhuohua Wen, Gengwu Ma, Mengshi Huang, Chi Huang, Yuqi Hu, Hao Yuan, Qinwen Liu, Daogang Guan, Jun Wang, Chuanzhi Duan
Summary: The study presents a one-pot radical polymerization method to fabricate a hydrogel with adhesive properties, which can effectively treat bacterial-infected diabetic wounds and accelerate wound healing.
CARBOHYDRATE POLYMERS
(2024)
Article
Chemistry, Applied
Montarop Yamabhai, Munthipha Khamphio, Thae Thae Min, Chai Noy Soem, Nguyen Cao Cuong, Waheni Rizki Aprilia, Krisanai Luesukprasert, Karsidete Teeranitayatarn, Atthaphon Maneedaeng, Tina R. Tuveng, Silje B. Lorentzen, Simen Antonsen, Paiboon Jitprasertwong, Vincent G. H. Eijsink
Summary: The study investigates the bioconversion of chitosan into soluble anti-inflammatory chitosan oligosaccharides (CHOS) using an enzyme. The results show that the generated CHOS have anti-inflammatory activity, but the magnitude of the activity depends on the substrate and production process. Different methods of dissolving chitosan also affect the properties of CHOS. The study highlights the importance of quality assurance in CHOS preparations.
CARBOHYDRATE POLYMERS
(2024)
Article
Chemistry, Applied
Wen Cao, Jiangping Wu, Xinya Zhao, Zixu Li, Jie Yu, Taili Shao, Xuefeng Hou, Lutan Zhou, Chunfei Wang, Guodong Wang, Jun Han
Summary: In this study, a water-soluble polysaccharide (PLP1) was successfully isolated and purified from Pueraria lobata. It was found that PLP1 was composed of specific glycosidic units and exhibited a better free radical-scavenging ability. Moreover, PLP1 effectively protected the liver against acute alcoholic liver disease (ALD) in mice.
CARBOHYDRATE POLYMERS
(2024)
Article
Chemistry, Applied
Ya Su, Yaqian Liu, Xueyan Hu, Yueqi Lu, Jinyuan Zhang, Wenbo Jin, Wang Liu, Yan Shu, Yuen Yee Cheng, Wenfang Li, Yi Nie, Bo Pan, Kedong Song
Summary: A 3D printed scaffold based on carbon dots-curcumin nano-drug release has been developed for drug delivery after breast cancer surgery. The scaffold showed effective inhibition of tumor growth, antibacterial activity, and promotion of wound healing, making it a promising approach for preventing tumor recurrence.
CARBOHYDRATE POLYMERS
(2024)
Article
Chemistry, Applied
Ekaterina Sokolova, Diane Jouanneau, Antonin Chevenier, Murielle Jam, Nathalie Desban, Pierre Colas, Elizabeth Ficko-Blean, Gurvan Michel
Summary: Carrageenans, a compound synthesized in red algae, have various biological properties and are valuable in the pharmaceutical and cosmetic industries. Their fine structure affects wound healing, oxidative processes, hemostasis, and inflammation. Enzymatic modification of carrageenans produces oligosaccharides that bind to natural human serum antibodies and specific antibodies, showing potential for therapeutic applications.
CARBOHYDRATE POLYMERS
(2024)
Article
Chemistry, Applied
Yan Shi, Miao Yu, Kaijin Qiu, Tiantian Kong, Chunjing Guo, Wenxue Zhang, Daquan Chen, Ming Kong
Summary: In this study, functionalized transfersomes were developed to co-deliver doxorubicin and 1MT towards primary tumors and tumor draining lymph nodes via transdermal administration using microneedles. The results showed that the nano-complexed microneedles exhibited a stronger suppression in tumor growth compared to the intravenous group.
CARBOHYDRATE POLYMERS
(2024)