Article
Agricultural Engineering
Se-Eun Ban, Eun-Ju Lee, Da-Jung Lim, In-Seon Kim, Jae-Won Lee
Summary: In this study, hemicellulose was effectively removed from biomass using sulfuric acid pretreatment, resulting in the production of biochar with an aromatic and graphitized structure. Biochar derived from pretreated biomass had a higher specific surface area and more micropores, leading to a higher removal rate of diazinon in soil.
BIORESOURCE TECHNOLOGY
(2022)
Article
Green & Sustainable Science & Technology
Fanzhi Qin, Chen Zhang, Guangming Zeng, Danlian Huang, Xiaofei Tan, Abing Duan
Summary: Lignocellulosic biomass pyrolysis and gasification technologies have been widely explored for the production of bio-oil, syngas, and process heat. The byproduct of this process, biochar, has attracted attention for its potential value in carbon utilization and carbon neutralization. However, there is a lack of systematic studies on the chemical composition and structure changes during the carbonization process of lignocellulosic biomass, as well as the origin of biochar reactivity. This article provides insights into the decomposition/transformation mechanisms of lignocellulosic biomass and the reactivity-related compositions of biochar. The discussion also expands on the origin of biochar's reactivity and potential ways to express its reactivity. The outlook section highlights future directions and prospects for further research and green applications.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2022)
Article
Chemistry, Multidisciplinary
Peiyu Zhao, Yanchao Yin, Wei Cheng, Xianmang Xu, Deliang Yang, Wenpeng Yuan
Summary: The study successfully synthesized mesoporous carbon with ultra large pore volume and abundant mesopores structure, and impregnated with tetraethylenepent amine (TEPA) to prepare the adsorbent, demonstrating high CO2 capture performance.
JOURNAL OF CO2 UTILIZATION
(2021)
Article
Thermodynamics
Oraleou Sangue Djandja, Shimin Kang, Zizhi Huang, Junqiao Li, Jiaqi Feng, Zaiming Tan, Adekunle Akim Salami, Bachirou Guene Lougou
Summary: Machine learning methods are promising for controlling thermochemical processes. This study used XGBoosting and Random Forest to predict fuel properties of hydrochar from co-hydrothermal carbonization of sewage sludge and biomass. XGBoosting performed better than Random Forest in predicting carbon content, heating value, and mass and energy yields, while Random Forest outperformed XGBoosting in predicting fuel ratio. The best models achieved high R2 values between predicted and experimental values for training and testing.
Article
Engineering, Chemical
Leticia dos Reis Darcie, Brenna Vieira Jacon, Grazielle Santos Silva Andrade, Anderson Maida Siqueira Oliveira, Melina Savioli Lopes, Tania Regina Giraldi
Summary: This study explores the decoloration potential of eucalyptus sawdust as a low-cost natural adsorbent for rhodamine B removal. The characterization of the adsorbent and optimization of dye removal conditions were conducted, with findings indicating that RhB adsorption follows second-order kinetics. Thermodynamic analysis showed that the adsorption of RhB is endothermic, spontaneous, and favorable.
DESALINATION AND WATER TREATMENT
(2021)
Article
Environmental Sciences
Nahar Sachin, Nahar Singh, Kalpit Shah, Biplob Kumar Pramanik
Summary: This study synthesized pure and doped zinc oxide (ZnO) nanoparticles and investigated their adsorption capabilities for removing toxic dyes. The results showed that Mn-doped ZnO had the highest adsorption efficiency for congo red (CR) dye. The study also found that Van der Waal interactions, H-bonding, and electrostatic interaction were the mechanisms responsible for dye removal.
ENVIRONMENTAL RESEARCH
(2023)
Article
Environmental Sciences
Shuo Ai, Yue Qin, Yuxiang Hong, Linghui Liu, Wanguo Yu
Summary: This study modified cellulosic materials for the removal of Pb2+ in wastewater through carbonization and ion exchange methods, demonstrating improved adsorption capacity and recyclability, indicating its potential application value.
ENVIRONMENTAL POLLUTION
(2022)
Article
Agricultural Engineering
Efthalia Georgiou, Marija Mihajlovic, Jelena Petrovic, Ioannis Anastopoulos, Carsten Dosche, Ioannis Pashalidis, Dimitrios Kalderis
Summary: In the bio-circular economy framework, miscanthus biomass was valorized through a single-stage, low severity hydrothermal carbonization process. The produced hydrochars exhibited higher C content and lower O content, with MIS-180 identified as the optimal sample for adsorption of Cu2+ and NH4+. The higher adsorption capacities of MIS-180 were attributed to its higher number of O-containing functional groups. Cu2+ adsorption followed the 2nd order kinetic model, while NH4+ adsorption followed the 1st-order kinetic model, due to different mechanisms involved.
BIORESOURCE TECHNOLOGY
(2021)
Article
Engineering, Environmental
Xiaochen Liu, Jun Lu, Minghao Fu, Hua Zheng, Quanyuan Chen
Summary: Powdered activated carbon (PAC) was used as a catalyst for hydrothermal carbonization (HTC) of cotton pulp black liquor (CPBL). The results showed that PAC-HTC could effectively decontaminate CPBL and had excellent reusability.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Energy & Fuels
Betul Ercan, Koray Alper, Suat Ucar, Selhan Karagoz
Summary: In this study, hydrothermal carbonization, torrefaction, and pyrolysis were conducted on hornbeam wood chips. The resulting biochars and hydrochars were analyzed. Biochars from torrefaction had high yields with no significant structural changes compared to the raw material. Biochars from pyrolysis had high fixed carbon content that increased with temperature. Hydrochars from hydrothermal carbonization had higher degree of carbonization than biochars from torrefaction. The highest heating value of the biochar was 32.51 MJ kg-1, produced from pyrolysis at 575 & DEG;C.
JOURNAL OF THE ENERGY INSTITUTE
(2023)
Article
Biochemistry & Molecular Biology
Yi Wei, Wei Chen, Chuanfu Liu, Huihui Wang
Summary: This study involved the preparation of two Cr(VI) adsorbents using hemicelluloses, with the HTC-NH2 showing higher adsorption capacity. The results suggest that the green hydrothermal treatment with ammonia solution offers a simple and feasible method for preparing Cr(VI) adsorbents.
Article
Thermodynamics
Xiaoluan Lu, Xiaoqian Ma, Xinfei Chen
Summary: The addition of lignocellulosic biomass reduced the release of heavy metals and potential ecological risks. Hydrochar derived from co-HTC had higher fuel ratio and high HHV, with safer and more stable combustion behavior compared to that derived from SS.
Article
Environmental Sciences
T. Hien Tran, Anh Hoang Le, T. Huu Pham, La Duc Duong, X. Cuong Nguyen, Ashok Kumar Nadda, Soon Woong Chang, Woo Jin Chung, D. Duc Nguyen, Dinh Thanh Nguyen
Summary: In this study, activated carbon was successfully synthesized from corncobs using hydrothermal carbonization and hydrochemical activation. The activated carbon showed a high specific surface area and oxygenated functional groups, and exhibited a high adsorption capacity for methylene blue. The results indicate that this inexpensive adsorbent derived from corncobs has potential for wastewater treatment.
ENVIRONMENTAL RESEARCH
(2022)
Article
Engineering, Chemical
Houle Xiang, Kun Dai, Jingwei Kou, Guiqin Wang, Zhen Zhang, Dan Li, Chen Chen, Jinglan Wu
Summary: Two novel adsorbents (M-0 and M-1) were synthesized by one-step synthesis of magnetic nanoparticles with alkaline lignin and oxidized alkaline lignin, respectively. The core-shell structure of the adsorbents was confirmed by various characterization techniques. The adsorption performance of M-0 and M-1 for ferulic acid and furfural was investigated, and the results showed pH sensitivity for ferulic acid, rapid adsorption process, and thermodynamic unfavorable adsorption. Furthermore, the detoxification of simulated acid hydrolysate using M-1 and its reusability were studied, and M-1 exhibited high removal rates for ferulic acid and furfural with excellent reusability.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Review
Environmental Sciences
Sivaprasad Shyam, Jayaseelan Arun, Kannappan Panchamoorthy Gopinath, Gautam Ribhu, Manandhar Ashish, Shah Ajay
Summary: This paper summarizes the negative impacts of excessive phosphate run-off on water environments, and strategies for reducing phosphorus concentration using hydrochar and biochar, as well as potential handling methods for spent char. It highlights the advantages of hydrochar and biochar as phosphorus adsorbents, emphasizing their cost-effectiveness and potential for reuse. Further research on optimizing conditions and analysis could lead to commercialization of char-based adsorption technology.
Article
Environmental Sciences
Hanna Runtti, Tero Luukkonen, Sari Tuomikoski, Tao Hu, Ulla Lassi, Teija Kangas
Summary: Naturally occurring layered double hydroxide mineral, brucite (BRU), was found to be the most efficient adsorbent for removing antimony (Sb) from synthetic and real wastewaters. It showed slightly higher experimental maximum adsorption capacity than hydromagnesite (HYD) and a commercial magnesium-rich mineral adsorbent in batch experiments. Brucite also demonstrated efficient performance in continuous removal of Sb from mine effluent. Regeneration of adsorbents was more effective under acidic conditions.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Inorganic & Nuclear
Petteri Laine, Marianna Hietaniemi, Juho Valikangas, Toni Kauppinen, Pekka Tynjala, Tao Hu, Shubo Wang, Harishchandra Singh, Lassi Ulla
Summary: The co-precipitation of Ni0.8Co0.1Mn0.1(OH)(2) (NCM811) and Mg-doped (0.25 wt% and 0.5 wt%) NCM811 precursors from concentrated metal sulphate solutions was investigated. The study aimed to understand the impact of magnesium dopant on the co-precipitation step and the performance of Li-ion battery cells using NCM811 as the cathode active material. The results showed that magnesium was fully co-precipitated in the NCM811 precursors and evenly distributed throughout the sample. However, contrary to expectations, magnesium doping did not improve the cyclability of coin cells. Evaluation in pouch cells after 1000 cycles showed a slight improvement in cyclability. Washing effects were observed in lattice parameters, and washing also decreased the capacity retention after 62 cycles for all samples.
DALTON TRANSACTIONS
(2023)
Article
Engineering, Chemical
Hanna Runtti, Elavarasi Sundhararasu, Janne Pesonen, Sari Tuomikoski, Tao Hu, Ulla Lassi, Teija Kangas
Summary: Five alkali-activated analcime sorbents were developed for ammonium ion removal, and the effects of sorbent dosage, initial concentration, and contact time were evaluated. ANA-MK 1, ANA 2, and ANA-MK 4 showed the highest efficiency with maximum sorption capacities of 29.79, 26.00, and 22.24 mg g(-1), respectively. The sorption process was described by Langmuir, Freundlich, Sips, and Bi-Langmuir isotherm models, and the kinetic studies revealed different sorption mechanisms for different sorbents.
Article
Environmental Sciences
Mikael Manninen, Teija Kangas, Tao Hu, Toni Varila, Ulla Lassi, Hanna Runtti
Summary: The removal of dissolved zinc from water using a novel alkali-activated material (AAM) made from steel industry slags in a fixed-bed column was studied. The optimal operational parameters for the removal of Zn2+ from a ZnCl2 solution were determined using experimental design. The novel AAM showed great potential for water purification applications.
ENVIRONMENTAL TECHNOLOGY
(2023)
Article
Engineering, Environmental
Kyosti Rajaniemi, Anne Heponiemi, Tao Hu, Davide Bergna, Sari Tuomikoski, Ulla Lassi
Summary: In this study, three different electrocoagulation (EC) sludges were investigated as adsorbents and catalysts. The sludges, derived from the treatment of mining industry wastewater, were characterized and analyzed for their stability and iron leaching behavior. The results showed that the calcined EC sludges exhibited high adsorption efficiency for humic acids and catalytic activity for the removal of bisphenol A (BPA). The study also discovered a novel sludge modification process in the EC treatment, which could potentially provide low-cost materials for various applications.
JOURNAL OF ENVIRONMENTAL ENGINEERING
(2023)
Article
Chemistry, Physical
Yan Lin, Juho Valikangas, Rafal Sliz, Palanivel Molaiyan, Tao Hu, Ulla Lassi
Summary: Spinel LiNi0.5Mn1.5O4 (LNMO) is a promising cathode material for next-generation lithium-ion batteries due to its cobalt-free composition, high specific capacity, high operating voltage, low cost, and environmental friendliness. This study successfully synthesized single-crystal LNMO with optimized morphology and Mn3+ content through the sol-gel method, resulting in improved electrochemical performance.
Review
Chemistry, Multidisciplinary
Glaydson Simoes Dos Reis, Shaikshavali Petnikota, Chandrasekar M. Subramaniyam, Helinando Pequeno de Oliveira, Sylvia Larsson, Mikael Thyrel, Ulla Lassi, Flaviano Garcia Alvarado
Summary: The development of sustainable, low-cost, high energy and density power-density energy storage devices is crucial for achieving a carbon-neutral society by 2050. Biomass-derived carbon materials are extensively researched as electrode candidates for potassium and aluminum batteries due to their well-developed textures and large microcrystalline interlayer spacing.
Article
Environmental Sciences
Katariina Hautamaki, Anne Heponiemi, Sari Tuomikoski, Tao Hu, Ulla Lassi
Summary: In this study, cost-effective alkali-activated materials made from industrial side streams (blast furnace slag and Na-jarosite) were developed for catalytic wet peroxide oxidation reactions in wastewater treatment. The materials exhibited porous structure, high specific surface areas, and mainly mesoporous characteristics. They showed good removal efficiency of bisphenol A and high mechanical stability, making them promising catalysts for wastewater treatment.
ENVIRONMENTAL TECHNOLOGY
(2023)
Article
Electrochemistry
Petteri Laine, Juho Valikangas, Toni Kauppinen, Tao Hu, Shubo Wang, Graham King, Harishchandra Singh, Pekka Tynjala, Ulla Lassi
Summary: LiNiO2 cathode materials doped with magnesium and chromium were prepared through a cost-effective co-precipitation and lithiation method. The addition of magnesium improved electrochemical performance due to its phase stabilizing effects, while chromium doping led to poor performance. The study also explored the possibility of washing the lithiated materials to improve capacity retention, although the challenge of lithium loss from the surface layer remains.
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
(2023)
Review
Chemistry, Multidisciplinary
Varsha Srivastava, Katja Lappalainen, Annu Rusanen, Gabriel Morales, Ulla Lassi
Summary: This review focuses on the catalytic transformation of lignocellulosic biomass into value-added chemicals using MOF-based catalyst/composite materials. The tunability of MOF-based catalysts allows for tailoring their catalytic activity and selectivity through functionalization. The production of HMF and Furfural from lignocellulosic biomass is emphasized due to their versatility as intermediates for various biobased chemicals and fuels. The effects of different experimental parameters on biomass conversion by MOF-based catalysts are also discussed.
Article
Electrochemistry
Toni Kauppinen, Petteri Laine, Juho Valikangas, Pekka Tynjala, Tao Hu, Justin Salminen, Ulla Lassi
Summary: In this study, the co-precipitation of NCM811 precursors and cathodes for lithium-ion batteries was conducted using recycled and purified manganese solution. The aim was to investigate the role of impurities in the co-precipitation step and battery cell performance. It was found that cationic impurities including Ca, Zn, Mg, and Fe were co-precipitated with NMC811 precursors as expected based on thermodynamic considerations. These impurities did not significantly affect the particle morphology or tap density of NMC811, and surprisingly had minimal impact on cell performance. The cells with impurities exhibited good cyclability and high-capacity retention even after 1100 cycles compared to reference samples.
Article
Materials Science, Multidisciplinary
Ravi Moreno Araujo Pinheiro Lima, Glaydson Simoes dos Reis, Ulla Lassi, Eder Claudio Lima, Guilherme Luiz Dotto, Helinando Pequeno de Oliveira
Summary: In this study, activated biochar was prepared as the active electrode material for supercapacitors, and its capacitive performance was improved by doping with polypyrrole (PPy). Physicochemical characterization data showed that PPy doping affected the morphology, specific surface area, pore structure, and surface functionalities of the biochar. The biochar-PPy composite exhibited a lower surface area compared to pristine biochar.
C-JOURNAL OF CARBON RESEARCH
(2023)
