Article
Chemistry, Applied
Yuru Yang, Lei Zeng, Zongkun Lin, Huabin Jiang, Aiping Zhang
Summary: A chitosan-based bead was synthesized by crosslinking and sulfhydryl modification reaction, with good removal ability for heavy metal ions Pb2+, Cu2+, and Cd2+. The adsorption process of the beads fits the Langmuir isotherm model and pseudo second-order kinetics model.
CARBOHYDRATE POLYMERS
(2021)
Article
Environmental Sciences
Sara Ranjbari, Ali Ayati, Bahareh Tanhaei, Amani Al-Othman, Fatemeh Karimi
Summary: In this study, bi-functionalized chitosan beads were successfully prepared and used for the efficient removal of anionic food dye from polluted water. The experimental data showed high adsorption efficiency, fitting well with the pseudo-first-order kinetic model and the Langmuir isotherm model under optimal conditions. The conjugation of chitosan beads with surfactant and ionic liquid introduced a new type of adsorbents for wastewater treatment.
ENVIRONMENTAL RESEARCH
(2022)
Article
Biochemistry & Molecular Biology
Wenqi Li, Liping Zhang, Die Hu, Ran Yang, Jie Zhang, Ying Guan, Fanxun Lv, Hui Gao
Summary: A novel mesoporous nanocellulose/sodium alginate/carboxymethyl-chitosan aerogel was fabricated and its adsorption performance towards Cu2+ and Pb2+ was investigated. The aerogel showed high efficiency, large adsorption capacity, and excellent recyclability, making it promising for wastewater treatment.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Materials Science, Multidisciplinary
Ankurita Nath, Subhadeep Biswas, Preeti Pal, Anjali Pal
Summary: In this study, chitosan hydrogel beads and surfactant-modified chitosan hydrogel beads were used to remove Cu(II) ions from aqueous solutions, and the waste beads loaded with Cu(II) ions were used as catalysts for the reduction of 4-nitrophenol. The results showed that the surfactant-modified beads exhibited superior catalytic performance compared to the normal beads.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Environmental Sciences
Soheil Hamidi Tabrizi, Bahareh Tanhaei, Ali Ayati, Sara Ranjbari
Summary: In this study, the surface of montmorillonite K10 was successfully modified to Mt-HDA, resulting in improved removal efficiency of Tartrazine (TZ) from aqueous phase. The experimental results showed that HDA modification significantly enhanced the adsorption ability of montmorillonite towards TZ molecules, with fast adsorption process and maximum adsorption capacity of 59mg/g at 45 degrees C.
ENVIRONMENTAL RESEARCH
(2022)
Article
Engineering, Environmental
Abubakar Chadi Sadiq, Ayo Olasupo, Nurul Yani Rahim, Wan Saime Wan Ngah, Faiz Bukhari Mohd Suah
Summary: This study investigated the adsorption properties of malachite green dye on two types of chitosan deep eutectic solvent adsorbents. The optimal pH and adsorption capacity under different factors were determined, while various characterization techniques were used to reveal the surface properties, crystallinity, pore sizes, and magnetic characteristics of the adsorbents. The results showed good fitting with the Langmuir model and the best description of kinetic behavior by the pseudo-second-order kinetic model for both adsorbents.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Chemical
Lingli Li, Qi Liao, Bingchao Hou, Chuanshu He, Jiamei Liu, Bingrui Li, Ming Yu, Yucheng Liu, Bo Lai, Bing Yang
Summary: A functionalized magnetic chitosan beads (MCB-ECH-SH/SO3H) was found to efficiently remove hexavalent chromium (Cr(VI)) from wastewater by reducing it to less toxic trivalent chromium (Cr(III)). The material also exhibited high stability, strong reducing capacity, easy recycling, making it an ideal candidate for treating chromium-containing wastewater.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Chemical
Yilin Yu, Zhixiang Lin, Yijiang Luo, Yingmin Liao, Xiaojia Huang
Summary: This study proposes an adsorbent based on waste material for efficient removal of surfactants from water. The modified adsorbent shows good removal performance for the target surfactant and is applicable to different water sources. The study also reveals that an increase in temperature promotes the removal of surfactants. Additionally, the study demonstrates the feasibility of waste material reutilization.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Jingyu Du, Junzhuo Sun, Daohai Zhang
Summary: Heavy metals in wastewater pose a serious threat to human health and survival. Among the various methods for removing heavy metals, adsorption is the most popular due to its simplicity and safety. Zeolite, with its unique spatial structure, low cost, and environmental friendliness, has excellent adsorption properties and is a promising adsorbent. In this study, a modified zeolite-chitosan composite film was prepared and the effects of various factors on the adsorption of Pb2+ were investigated. The optimal conditions and adsorption performance were determined.
POLYMER ENGINEERING AND SCIENCE
(2023)
Article
Environmental Sciences
Dongliang Hao, Yali Liang
Summary: In this study, a novel adsorbent, N-carboxymethyl chitosan hydrogel (NCS-hydrogel), was developed for the removal of Cu, Cd, and Pb ions from water pollution. The results showed that NCS-hydrogel exhibited excellent adsorption performance, and the adsorption process was a spontaneous monolayer chemisorption.
ENVIRONMENTAL TECHNOLOGY
(2022)
Article
Engineering, Environmental
Kheira Belkassa, Mounir Khelifa, Isabelle Batonneau-Gener, Kheira Marouf-Khelifa, Amine Khelifa
Summary: In this study, Halloysite was processed with different concentrations of HCl solutions and analyzed for its adsorption efficiency towards crystal violet. It was found that the optimal adsorption was achieved by balancing the hydrophilic and hydrophobic properties of the material, which could be controlled through treatment methods and conditions.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Biochemistry & Molecular Biology
Adel Mokhtar, Soumia Abdelkrim, Mohammed Hachemaoui, Bouhadjar Boukoussa, Wahiba Chaibi, Amina Sardi, Amal Djelad, Mohammed Sassi, Ismail Issam, Jibran Iqbal, Shashikant P. Patole, Mohamed Abboud
Summary: In this study, biodegradable and low-cost adsorbent beads were prepared using date pits powder and sodium alginate. These beads were found to have a high adsorption capacity for the cationic dye Crystal violet. The optimal composite beads (SA@6DP) achieved a removal efficiency of 99.873% for Crystal violet.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Engineering, Environmental
Joanna Kurczewska
Summary: In this study, chitosan beads with incorporated montmorillonite were prepared and characterized. The results showed that the chitosan beads with montmorillonite had better adsorption capacity for methyl green removal. Several parameters were investigated to optimize the process.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Engineering, Chemical
Haohe Huang, Qifeng Yang, Lanyu Zhang, Chongxing Huang, Yong Liang
Summary: A simple polyacrylamide modification method was used to improve the adsorption capacity and anti-interference of kaolin, enhancing the adsorption performance of sodium alginate/carboxymethyl chitosan composite hydrogel. The modified kaolin showed reduced interference from coexisting ions and pH influence, and maintained a high adsorption capacity even after multiple reuse cycles.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2022)
Article
Environmental Sciences
Joydeep Dutta, Asma Ashraf, Sumedha Mehmi, Anupam Kumar, Abdullah Alodhayb, George Z. Kyzas
Summary: The incorporation of groundnut hull powder with chitosan gels forms composite beads that enhance their stability and adsorption capacity for toxic dyes and metals in water. Characterization techniques such as SEM, TGA, FTIR, and XRD showed that the surface morphology of the composite beads changed, becoming rougher with more valley-like features and irregular cracks. The impregnation of groundnut hull powder resulted in increased functional groups, as indicated by the FTIR data. Thermal analysis and XRD analysis confirmed the presence of groundnut hull in the composite beads, which formed amorphous beads suitable for the adsorption of toxic substances.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
Utpal Ghosh, Ankush Majumdar, Anjali Pal
Summary: A novel 3D macroporous structure of graphitic carbon nitride composed of self-assembled 2D nitrogen vacancy engineered nanosheets was fabricated through a facile synthesis method. The photocatalyst exhibited superior photocatalytic efficiency towards tetracycline antibiotic degradation under LED light illumination, attributed to its extended visible light extraction efficiency, increased suppression efficacy of charge carriers, and porous structure. The material also showed excellent stability even after five cycles of photocatalytic tetracycline degradation.
MATERIALS RESEARCH BULLETIN
(2021)
Article
Chemistry, Physical
Ankush Majumdar, Utpal Ghosh, Anjali Pal
Summary: A novel visible-light-responsive 2D/2D g-C3N4/Bi4NbO8Cl nano-composite photocatalyst was successfully synthesized and demonstrated high photocatalytic degradation efficiency towards oxytetracycline. The improved performance can be attributed to the formation of a type-II heterojunction, which enhances visible light absorption and reduces recombination of photogenerated electron-hole pairs. Additionally, the nano-composite exhibited good stability after multiple cycles of degradation experiments, showing potential for low-cost and energy-efficient environmental remediation applications.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Subhadeep Biswas, Anjali Pal
Summary: The development of sustainable green catalysts, using alginate hydrogel beads as support for iron oxide, has shown efficient reduction of 4-nitrophenol to 4-aminophenol. The catalysts exhibit stability, cost-effectiveness, non-toxicity, and reusability for multiple cycles.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Imon Kalyan, Tarasankar Pal, Anjali Pal
Summary: The study successfully synthesized two different sizes of hollow gold nanoparticles through Galvanic replacement reaction (GRR) and immobilized them on cationic surfactant-modified silica. It was found that smaller particles exhibited higher catalytic activity than larger particles, and solid-supported catalysts showed advantages in terms of shelf-life and ease of application compared to solution-phase catalysts.
SURFACES AND INTERFACES
(2021)
Article
Engineering, Environmental
Utpal Ghosh, Anjali Pal
Summary: An all-solid-state Z scheme composite with excellent photocatalytic degradation performance and stability has been successfully designed through a single-step hydrothermal treatment.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Ankush Majumdar, Utpal Ghosh, Anjali Pal
Summary: A 2D-Bi4NbO8Cl nanosheet (BNOCF) photocatalyst was fabricated using a molten salt or flux method and exhibited a higher degradation efficiency towards tetracycline (TCH) compared to bulk-Bi4NbO8Cl (BNOCS). The increased efficiency was attributed to the 2D architecture of BNOCF, which provided a larger surface area and reduced charge recombination rate.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Review
Engineering, Environmental
Ankurita Nath, Subhadeep Biswas, Anjali Pal
Summary: Continuous release of synthetic organic pollutants in the ecosystem, such as Bisphenol A (BPA), poses a global concern due to their toxicity and persistent nature. This review focuses on the investigation of heterogeneous catalysts used for the degradation of BPA through Fenton-like reactions, which are commonly employed for wastewater remediation. The review documents the application of various Fenton catalysts, their morphological characteristics, oxidizing properties, toxicity analysis, and the current state of BPA degradation. Challenges and prospects for analyzing degradation products of landfill leachate are also highlighted.
WATER SCIENCE AND TECHNOLOGY
(2022)
Review
Chemistry, Multidisciplinary
Utpal Ghosh, Anjali Pal, Tarasankar Pal
Summary: In recent years, there has been great interest in near-infrared (NIR) active photocatalysts for their ability to harvest solar NIR energy. However, the quick energy relaxation of plasmon-generated hot electrons hinders their application in photocatalysis. This review summarizes the recent progress in plasmon-induced NIR active photocatalysis and discusses the drawbacks, solutions, and potential of non-noble metal plasmonic photocatalysis.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Materials Science, Multidisciplinary
Ankurita Nath, Subhadeep Biswas, Preeti Pal, Anjali Pal
Summary: In this study, chitosan hydrogel beads and surfactant-modified chitosan hydrogel beads were used to remove Cu(II) ions from aqueous solutions, and the waste beads loaded with Cu(II) ions were used as catalysts for the reduction of 4-nitrophenol. The results showed that the surfactant-modified beads exhibited superior catalytic performance compared to the normal beads.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Imon Kalyan, Subhadeep Biswas, Tarasankar Pal, Anjali Pal
Summary: This study prepared zero valent arsenic nanoparticles in two different size ranges and used them to synthesize silver nanoparticles. The prepared nanoparticles were immobilized onto surfactant-modified silica and used as catalysts for the reduction of 4-nitrophenol. The homogeneous catalysts were found to be more efficient than the supported catalysts. In addition, smaller sized nanoparticles showed higher reaction rates in both homogeneous and heterogeneous catalytic reactions.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Subhadeep Biswas, Anjali Pal
Summary: This study demonstrates a novel protocol for the treatment of dye wastewater and selective extraction of desired dye using biopolymer composite hydrogel beads. The application of biopolymers for wastewater treatment and resource recovery from the waste stream is of great significance. The results also show that the biopolymer composite beads exhibit good reusability and high recovery rate in real wastewater.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Ankurita Nath, Subhadeep Biswas, Anjali Pal
Summary: In this study, eggshell powder (ESP) was used as a selective heterogeneous catalyst for the oxidative degradation of crystal violet (CV) dye in aqueous media. ESP acted as a carbonate (CO32) source, facilitating the formation of carbonate anion radicals (CO3 (center dot-)) in the presence of H2O2. The combination of these radicals and center dot OH radicals led to the selective degradation of CV dye. The use of ESP as a catalyst offers a promising route for CV degradation and the utilization of eggshell waste.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Review
Chemistry, Applied
Subhadeep Biswas, Anjali Pal
Summary: Research on wastewater remediation by biopolymers and biopolymer composites, particularly in removing surfactants, is of great environmental significance. Biopolymer based adsorbents show potential to replace conventional adsorbents and exhibit competitive behavior in terms of adsorption capacity, cost effectiveness, and biocompatibility. Various interesting observations and interactions related to surfactant adsorption have been covered in this review, with recommendations for further exploration of unexplored biopolymers and applications in pollutant remediation.
CARBOHYDRATE POLYMER TECHNOLOGIES AND APPLICATIONS
(2021)
Article
Engineering, Environmental
Ashish Kumar Nayak, Anjali Pal
Summary: This study prepared reusable bioadsorbents derived from overripe Abelmoschus esculentus seeds using thermodynamically-regulated esterification with carboxylic acids. The carboxylic acid-modified materials showed high adsorption capacity for gentian violet dye, with optimal conditions found at pH 5.67 and 45 degrees C. The adsorption process was determined to be endothermic, spontaneous, and favorable, with chemisorption and physisorption playing key roles. Additionally, artificial neural networks were successfully utilized to model and predict the non-linear relationships of process parameters in the adsorption process, demonstrating their applicability in predicting adsorption capacity.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Environmental
Utpal Ghosh, Ankush Majumdar, Anjali Pal
Summary: The potential of graphitic carbon nitride in the photocatalytic reduction of CO2 has been extensively explored, with heterostructure fabrication being the most efficient method for improving charge carrier separation efficiency. This review summarizes recent progress and design considerations of graphitic carbon nitride based heterostructures for CO2 reduction, highlighting the unique characteristics and potential applications in enhancing CO2 adsorption and activation efficacy.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Environmental
Francisco de Borja Ojembarrena, Elena Fuente, Angeles Blanco, Carlos Negro
Summary: Accumulation of Cr(VI) in industrial fiber cement process water can affect product quality and health, and it needs to be removed to avoid environmental risks. The study found that cationic cellulose nanocrystals (CCNCs) have higher adsorption efficiency and lower cost compared to conventional adsorbents.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Review
Engineering, Environmental
Shentan Liu, Yangchen Zhang, Xiaojuan Feng, Sang-Hyun Pyo
Summary: This paper summarizes the common problems of constructed wetlands (CWs) and proposes corresponding optimized solutions, including thermal insulation and additional aeration in cold climates, choosing suitable plant species and planting patterns to enhance phytoremediation in CWs, using various methods to monitor and evaluate CW clogging, implementing anti-clogging measures, controlling greenhouse gas emissions during CW treatment, constructing and utilizing CW databases, designing appropriate CW types, and implementing strict technical management and supervision.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Article
Engineering, Environmental
Norzila Mohd, Nazlina Haiza Mohd Yasin, Wan Hasnidah Wan Osman, Mohd Sobri Takriff
Summary: This study demonstrates that Chlamydomonas sp. is effective in removing nutrients from palm oil mill effluent and shows particular efficiency in the removal of ammonium and phosphate.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Article
Engineering, Environmental
Mingzhen Zhang, Guijian Liu, Ruijia Liu, Jinzhao Xu, Wen Si, Yong Wei
Summary: Tieguanyin tea stem was used to synthesize modified biochar for the adsorption of copper and zinc. Among the modified biochar, Fe-BCs had the highest adsorption capacity, with Fe-BC650 being the best adsorbent. It reached adsorption equilibrium in 1 minute and had a maximum adsorption capacity of 303.5996 mg/g for Cu (II) and 254.0711 mg/g for Zn (II) in single-metal solutions. However, there were antagonistic impacts between Cu2+ and Zn2+.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Article
Engineering, Environmental
Lingling Zhao, Qiaoshu Zhou, Yun Yang, Yuan Zhang, Yewei Qiu, Yanjun Chen, Xian Jin, Xiangjun Yang, Shixiong Wang
Summary: This research presents a method for selectively recovering gold from e-waste water using metal sulfides microspheres prepared by hydrothermal technique. The results show that the assistance of visible light significantly improves the gold adsorption performance of metal sulfides. The metal sulfides exhibit excellent gold adsorption properties, high selectivity, ultra-high adsorption capacity, and good recyclability.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Article
Engineering, Environmental
Laishram Saya, W. Rameshwor Singh, Sunita Hooda
Summary: Organic-inorganic nanoblends, such as polysaccharide-blended-inorganic ones, have versatile applications and have gained significant research attention. In this study, a magnetic guar gum/graphene oxide nanocomposite blended with CuO was successfully prepared and investigated for its adsorption capacity for ciprofloxacin removal. The results showed that the nanocomposite exhibited excellent adsorption capacity and the adsorption process was spontaneous.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Article
Engineering, Environmental
Umit Ecer, Sakir Yilmaz
Summary: A novel and effective catalyst Co@MIL-68(Fe)@Fe3O4@CM-BC was synthesized and used for the catalytic reduction of crystal violet in aqueous environments. The catalyst showed high efficiency in degrading crystal violet under specific conditions, and exhibited good regeneration performance.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Article
Engineering, Environmental
Chi Zhang, Miao Zhang, Haohan Yang, Wei Cai, Jun Wu
Summary: Enhancing the bioaugmentation of common nitrifiers in the partial nitrification/anammox process can decrease the activity of nitrite oxidizing bacteria and increase the activity of anammox bacteria, leading to improved total nitrogen removal efficiency.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Article
Engineering, Environmental
Runzhang Zuo, Dajun Ren, Yangfan Deng, Canhui Song, Yubin Yu, Xiejuan Lu, Feixiang Zan, Xiaohui Wu
Summary: This study found that fine bubble aeration in membrane bioreactors (MBR) can better control membrane fouling and reduce energy consumption. However, compared to fine bubble aeration, coarse bubble aeration released more proteins and polysaccharides, resulting in a decrease in functional bacteria and enzymes involved in nitrogen and phosphorus pathways.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Article
Engineering, Environmental
Ch Tahir Mehmood, Jiekai Dai, Hanjun Zhao, Ziyi Zhong
Summary: Wirelessly powered photocatalyst-coated spheres (WPS) have been developed and demonstrated for various applications, including photodegradation and fouling control. These WPS are cost-effective, easy to fabricate, and have excellent visible light sources, making them suitable as carriers for photocatalysts.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Article
Engineering, Environmental
Yifan Wang, Xiaoxuan Kang, Yuting Li, Ruyi Li, Chang Wu, Luyao Wang, Chongqing Wang, Tao Yang, Ming Ge, Zhangxing He
Summary: Cobalt/carbon nanofibers (Co/CNF) were prepared and exhibited excellent catalytic activity in the degradation of tetracycline by activating peroxodisulfate (PDS). The effects of process parameters on tetracycline removal were studied, and the reaction mechanism was confirmed through experiments.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Article
Engineering, Environmental
Ting Wei, Yaqian Zhao, Jia Guo, Bin Ji, Alvaro Pun Garcia, Abraham Esteve Nunez
Summary: This study developed a novel lightweight substrate (Al-NLS) composed of aluminum sludge and polyurethane, and investigated its effectiveness in constructed wetlands (CWs). Results showed that Al-NLS had favorable adsorption capacities for phosphorus and removal efficiencies for pollutants in real domestic wastewater. It also positively influenced the microbial community. Therefore, Al-NLS can be considered as a new alternative substrate in CWs technology.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Article
Engineering, Environmental
Dabojani Das, Achinta Bordoloi, Heyang Yuan, Daniel J. Caldwell, Rominder P. S. Suri
Summary: This study evaluates the degradation kinetics of antibiotic resistance genes and mobile genetic elements in water matrices by ozone treatment. The results show that extracellular antibiotic resistance genes can be effectively removed, while intracellular genes are more resistant to degradation. The impact of wastewater matrix on gene degradation is minimal.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)