Article
Chemistry, Physical
Sivakumar Vigneshwaran, Palliyalil Sirajudheen, Perumal Karthikeyan, Sankaran Meenakshi
Summary: In this study, a sulfur tethered adsorbent of Tapioca peel (S@TP) biochar was successfully fabricated and utilized for the removal of organic dyes such as Malachite Green (MG) and Rhodamine B (RhB) from water, showing adsorption efficiency of 30.18 and 33.10 mg/g, respectively.
SURFACES AND INTERFACES
(2021)
Article
Environmental Sciences
Xinxin Chen, Siheng Cai, Nan Zhang, Jieqiu Yang, Tangjian Peng, Fei Yang
Summary: Heavy metal pollution poses a serious threat to the environment and human health. Biosorption, a cost-effective and environmentally friendly method, has gained worldwide attention. This study investigates the biosorption of U(VI) onto live and dead cells of a Sphingopyxis strain YF1. The results show that both live and dead cells have good adsorption performance, with the maximal adsorption capacities of U(VI) being 140.7 mg g(-1) and 205.7 mg g(-1), respectively. The mechanisms of U(VI) adsorption by Sphingopyxis sp. YF1 were also revealed.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Review
Environmental Sciences
Don Berslin, Angelin Reshmi, Baskaran Sivaprakash, Natarajan Rajamohan, P. Senthil Kumar
Summary: This review focuses on the effective application of biochar in treating water contaminated by chromium, lead, and arsenic. It highlights the on-field applications of biochar in soil amendment, industrial wastewater treatment, and groundwater treatment. The article also discusses the feedstock for biochar production, various production processes, and the importance of optimal conditions. The removal performance and adsorption mechanism of biochar at different working conditions are consolidated.
Article
Engineering, Chemical
Adeyinka S. Yusuff, Lekan T. Popoola, Anselm I. Igbafe
Summary: This study compared the adsorption behavior of unmodified biochar and ZnCl2-modified biochar for the removal of Cr(VI) from water. The optimized ZMBC demonstrated a significantly higher removal efficiency than BC, mainly due to its higher surface area, well-developed porous structure, and dominant active surface functional groups. The Freundlich isotherm and PSO models were found to agree well with the experimental data.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2022)
Article
Environmental Sciences
Judilyn Q. Filipinas, Kim Katrina P. Rivera, Dennis C. Ong, Sheila Mae B. Pingul-Ong, Ralf Ruffel M. Abarca, Mark Daniel G. de Luna
Summary: This study successfully removed sodium diclofenac from aqueous solutions using rice hull biochar as an adsorbent, and identified factors affecting the removal efficiency. The Langmuir isotherm best fitted the experimental data, and the pseudo second-order model showed high correlation coefficients.
Article
Chemistry, Multidisciplinary
Bingyuan Huang, Dan Huang, Qian Zheng, Changhan Yan, Jiaping Feng, Hejun Gao, Hongquan Fu, Yunwen Liao
Summary: Excessive tetracycline in the water environment poses a threat to human and ecosystem health. To address this issue, researchers successfully prepared porous graphitic biochar with an ultra-large surface area. They investigated the structural changes of biochar under different conditions and examined the factors affecting tetracycline removal efficiency. The results highlight the importance of temperature, surface area, and pore structure in the removal of tetracycline.
Article
Environmental Sciences
Gokulan Ravindiran, Praveen Saravanan, Avinash Alagumalai, Saravanan Subbarayan
Summary: The present research successfully applied RSM, ANN, and ANFIS models for the decolorization of RY81 in aqueous solution, with thorough characterization and analysis. The study found that biochar can efficiently remove dyes and has good regeneration capabilities.
Article
Environmental Sciences
Xinyuan Yang, Wenfang Zhu, Fangyuan Chen, Yali Song, Ya Yu, Haifeng Zhuang
Summary: Retinervus luffae fructus biochar (RLFB) and ZnCl2 pretreated Retinervus luffae fructus biochar (ZRLFB) were prepared by pyrolysis for dye adsorption and granular sludge cultivation. Results showed that ZRLFB had higher adsorption effect on the dyes compared to RLFB. The adsorption process can be described using pseudo-second-order mechanisms and Langmuir model.
Article
Energy & Fuels
Riti Thapar Kapoor, Selvaraju Sivamani
Summary: This study successfully demonstrated the effective adsorption of the anionic dye direct red 31 (DR31) from aqueous solution using biochar derived from Eucalyptus citriodora leaves. The biochar exhibited high adsorption capacity and removal efficiency, making it a cost-effective and reusable option for treating dye-contaminated wastewater.
BIOMASS CONVERSION AND BIOREFINERY
(2021)
Article
Engineering, Environmental
Bowen Zheng, Jun Liao, Ling Ding, Yong Zhang, Wenkun Zhu
Summary: The study found that the biochar derived from horse manure, specifically HMBM-500, showed excellent adsorption performance for uranium due to the conversion of Mg2+ to MgO and the presence of active adsorption sites on the surface. The adsorption characteristics remained stable in the presence of environmental interferences, indicating its potential use in treating actual wastewater. Multiple characterizations confirmed that the high adsorption performance of HMBM-500 was attributed to coordination and precipitation to uranium with surface active sites, highlighting the importance of surface modification in developing high-performance adsorbents for uranium.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Environmental Sciences
Jun Liao, Xiaoshan He, Yong Zhang, Wenkun Zhu, Lin Zhang, Zhibing He
Summary: The Bi2O3 doped horse manure-derived biochar exhibited efficient removal of uranium(VI) from wastewater, with short equilibrium time, fast adsorption rate, and high adsorption capacity. The removal behavior of uranium(VI) by the biochar was not affected by interfering ions and ion strength, except for a few specific ions. The enrichment of uranium(VI) on the surface of the biochar was controlled by multiple factors.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Chen Zhou, Ermias Gebrekrstos Tesfamariam, Youneng Tang, Ang Li
Summary: This study quantifies the contributions of adsorption, bioreduction, and desorption in EPS-mediated U(VI) immobilization. Experimental results show that U(VI) immobilization is faster when exposed to H-2 compared to O-2. The kinetic model reveals that adsorption is dominant in the first minute, bioreduction is dominant from the second minute to the 50th minute, and after 50 minutes, bioreduction is balanced by desorption. This study also provides the first set of equilibrium data for U(VI) adsorption by EPS alone and shows that U(VI) adsorption onto EPS is endothermic, spontaneous, and favorable at higher temperatures.
FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING
(2023)
Article
Green & Sustainable Science & Technology
Huiting Zeng, Honghu Zeng, Hua Zhang, Asfandyar Shahab, Kang Zhang, Yanqin Lu, Iqra Nabi, Faiza Naseem, Habib Ullah
Summary: The research demonstrates that eucalyptus activated carbon can effectively remove hexavalent chromium from water, with a significantly higher removal rate than eucalyptus carbon. The surface area of activated carbon increased significantly, and the adsorption process is influenced by multiple factors.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Environmental Sciences
Haiyan Zhao, Ziqian Wang, Yonghong Liang, Tianxiang Wu, Yiliang Chen, Jieru Yan, Yiyong Zhu, Dahu Ding
Summary: Efficient adsorption of antibiotics from livestock wastewater is urgently needed. In this study, alkaline-modified biochar with larger surface area and pore volume was used for the adsorption of different types of antibiotics. The adsorption process was mainly determined by chemisorption and was influenced by solution pH. The study also revealed that the -OH groups on biochar surface were the dominant active sites for antibiotics adsorption. Furthermore, the biochar showed synergistic adsorption towards Zn2+/Cu2+ and antibiotics in a multi-pollutants system.
ENVIRONMENTAL RESEARCH
(2023)
Article
Chemistry, Analytical
Christiana Stasi, Efthalia Georgiou, Ioannis Ioannidis, Ioannis Pashalidis
Summary: The study found that oxidized biochar prepared from palm tree fibers is effective for removing uranium from laboratory and environmental waters. The adsorption process follows a second order kinetic model, which is endothermic and entropy-driven. Inner-sphere complex formation between carboxylic moieties on the surface and UO22+ was observed via IR spectra.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2022)