Article
Environmental Sciences
Zhuowen Meng, Shuang Huang, Zhongbing Lin
Summary: By modifying rice straw biochar with KMnO4, its adsorption capacity was significantly improved, especially during co-aging with soil. Modified biochar always had higher adsorption capacity than unmodified biochar after aging processes, and its dominant adsorption mechanism was precipitation and adsorption with minerals.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Agricultural Engineering
Zepeng Liu, Yueyao Hu, Jie Zhang, Ying Guan, Liping Zhang, Ping Ye, Tongtong Zhang, Xingyu Huang, Meng Wang, Hui Gao
Summary: This study proposes a novel approach to synthesize adsorbents with excellent physicochemical properties and green synthetic routes for efficient removal of Congo red wastewater. By co-modification with urea/calcium chloride, biochar NCBC obtained from Medulla Tetrapanacis was synthesized. NCBC exhibits a large surface area and a micro-mesoporous composite structure, with higher nitrogen content in comparison to directly modified biochar. The active sites on NCBC were found to be homogeneous and primarily bind to CR through chemisorption. Additionally, the practicality of NCBC was proven through the cultivation of Nelumbo nucifera Gaertn. and Penicillium.
BIORESOURCE TECHNOLOGY
(2023)
Article
Engineering, Environmental
Bo Cao, Jianhua Qu, Yihang Yuan, Weihang Zhang, Xuemei Miao, Xinru Zhang, Yuan Xu, Tianyi Han, Haijiao Song, Shouyi Ma, Xue Tian, Ying Zhang
Summary: Sulfide-iron decorated biochar (BC-Fe-S) was used for the removal of cadmium (Cd) and lead (Pb) from water. BC-Fe-S exhibited pH-dependent uptake capacities and conformed to pseudo-second-order and Langmuir models. Thermodynamic consequences showed that the contaminants uptake proceeded spontaneously. BC-Fe-S primarily bound Cd(II)/Pb(II) through chelation, ion exchange, co-precipitation, and electrostatic interaction.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Environmental Sciences
Han-Saem Lee, Hyun-Sang Shin
Summary: This study investigated the modified biochars for heavy metal removal from road runoff, finding that biochar prepared by manganese oxide impregnation showed excellent adsorption efficiency even under competitive conditions. The type of biochar and modification method significantly influenced the adsorption properties, with manganese and alkaline modifications causing substantial changes in surface area and functional groups.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Environmental Sciences
Yang Liu, Lixun Zhang, Zhengfang Zhang, Ying Zhang, Yuntao Guan
Summary: This study introduced a novel citrate-modified biochar as a soil conditioner to increase plant-available silicon and immobilize heavy metals. The biochar pre-treated with 0.1 mol.L-1 citrate showed optimal adsorption capacity for Cu, with mechanisms involving surface precipitation, surface complexation, electrostatic attraction, and hydrogen bonding. Our research suggests the potential of these materials for addressing silicon deficiency and heavy metal contamination issues in agro-ecosystems.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
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)
Review
Agricultural Engineering
Anil Kumar Patel, Ravi Katiyar, Chiu-Wen Chen, Reeta Rani Singhania, Mukesh Kumar Awasthi, Shashikant Bhatia, Thallada Bhaskar, Cheng-Di Dong
Summary: The evolving multidrug resistance in microbes due to increasing antibiotic pollution is a severe global crisis. Recent developments in antibiotic remediation using biochar show promising results. Biochar engineering advancements have improved the efficiency of biochar remediation by enhancing its interactions and bonding abilities with antibiotic pollutants. This review focuses on highlighting the effectiveness of biochar in reducing emerging antibiotic pollutants and discusses the relationship between feedstock, production conditions, engineering techniques, and biochar properties. The review also explores various modification strategies to improve biochar remediation potential and examines the interactions and properties of biochar and related composites, such as photocatalysis, adsorption, and oxidation processes. Additionally, future research directions and opportunities for biochar research are discussed.
BIORESOURCE TECHNOLOGY
(2022)
Article
Engineering, Environmental
Guangcai Yin, Xingling Chen, Binoy Sarkar, Nanthi S. Bolan, Tian Wei, Haiyi Zhou, Hailong Wang
Summary: This study aims to unravel the co-adsorption mechanisms of Cd(II) and As(III) by a Pennisetum sp. straw biochar (BC) modified with Fe-Mn oxide (FMBC). The maximum adsorption capacity of Cd(II) and As(III) by FMBC was 141.1 and 31.8 mg/g, respectively, which was 2.71 and 3.89 times higher than that of BC. In the dual-adsorbate system, Cd(II) increased the adsorption of As(III) on FMBC by 5.1-123.9%, while As(III) reduced the adsorption of Cd(II) by 0.7-24.8%, indicating respective synergism and competition effect.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
LingYan Liu, ChunHong Zhang, ShuangRong Chen, Lan Ma, YingMei Li, YiFeng Lu
Summary: The La(OH)3-modified canna biochar (CBC-La) exhibits excellent phosphate adsorption capacity, wide pH adaptability, and high selectivity. The main mechanisms of phosphate adsorption by CBC-La include electrostatic adsorption, ion exchange, and inner sphere complexation.
Article
Environmental Sciences
Xuewen Cao, Zhaofu Meng, En Song, Xiuxian Sun, Xiaolong Hu, Wenbin Li, Ze Liu, Shuai Gao, Bing Song
Summary: Bentonite-sludge biochar composites were used for simultaneous removal of norfloxacin and copper ions from aqueous solutions. The obtained composites showed high adsorption capacity and Sips adsorption model fitted well for the adsorption process. The results indicated that the adsorption of norfloxacin and copper ions was spontaneous and accompanied by different entropy changes.
Article
Environmental Sciences
Zhichao Xu, Hongyang Guo, Jinhua Gan, Taosif Ahmed, Teng Wang, Jingxin Liu, Meng Mei, Si Chen, Jinping Li
Summary: In this study, an efficient lanthanum ferrate magnetic biochar was synthesized and its performance and mechanisms for phosphate and tetracycline adsorption were investigated. The material showed high adsorption capacity and excellent performance in practical wastewater applications.
ENVIRONMENTAL RESEARCH
(2023)
Article
Green & Sustainable Science & Technology
Xuan Guo, Lin Zhu, Xin Xu, Maoting Ma, Guoyuan Zou, Dan Wei
Summary: This study explored the competitive or synergetic adsorption mechanism of phosphate and antibiotics using chestnut shell-derived biochar. Modified biochar containing Fe and Mn ions showed high adsorption capacities for phosphate and oxytetracycline. The adsorption processes followed the pseudo-second-order kinetic model, with phosphate fitting better to the Langmuir isotherm and oxytetracycline fitting better to the Freundlich isotherm. Solution pH and cation strength significantly influenced the adsorption.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Agricultural Engineering
Tianxiang Guo, Yonghe Zhang, Yuhan Geng, Jiahui Chen, Zhihui Zhu, Alemayehu Hailu Bedane, Yarong Du
Summary: The purpose of this paper is to demonstrate a surface oxidation modification strategy of nitrogen doping biochar for enhancing CO2 adsorption. The results indicate that the modified biochars exhibited high adsorption capacity of CO2 and improved selectivity by adjusting surface pore size and surface group distributions. The behavior of CO2 adsorption on the biochars well conformed to the quasifirst-order dynamical model.
INDUSTRIAL CROPS AND PRODUCTS
(2023)
Article
Environmental Sciences
Marta Marcinczyk, Patrycja Krasucka, Wenyan Duan, Bo Pan, Patryk Oleszczuk
Summary: This study evaluated the Zn-biochar composites after chemical aging, and found that aging process increased the surface oxygen functional groups, hydrophilicity and polarity, and affected the physicochemical properties and toxicity of the composites to organisms and the environment.
ENVIRONMENTAL POLLUTION
(2024)
Article
Biochemistry & Molecular Biology
Hongwei Sun, Jinjin He, Yucan Liu, Xianguo Ji, Gang Wang, Xiaoyong Yang, Yanxiang Zhang
Summary: In this study, iron and magnesium co-modified rape straw biochar (Fe/Mg-RSB) was synthesized and found to have enhanced adsorption efficiency for chloroquine phosphate (CQP), with a maximum adsorption capacity of 42.93 mg/g. The adsorption mechanism of Fe/Mg-RSB for CQP involved the synergistic effect of pore filling, pi-pi interaction, hydrogen bonding, surface complexation, and electrostatic interaction. The adsorption performance of Fe/Mg-RSB was affected by solution pH and ionic strength, but it still exhibited a high adsorption capability. The Yoon-Nelson model better described the dynamic adsorption behavior of Fe/Mg-RSB. Furthermore, Fe/Mg-RSB showed potential for repeated use in the remediation of CQP from contaminated water.
Article
Environmental Sciences
Zhuowen Meng, Shuang Huang, Ting Xu, Yiyi Deng, Zhongbing Lin, Xiugui Wang
ENVIRONMENTAL POLLUTION
(2020)
Article
Engineering, Geological
Chenyao Guo, Haoyu Yang, Zhongbing Lin, Jingwei Wu, Hang Li, Zhe Wu, Wei Mao
Summary: This study found that chemical precipitation significantly reduces the pore size of geotextiles in arid areas, while the network structure of geotextiles has a minimal impact on the precipitation process. With the increase in precipitate area density, the permeability and pore area variations of geotextiles decrease rapidly at first and then slowly.
GEOTEXTILES AND GEOMEMBRANES
(2021)
Article
Environmental Sciences
Zhuowen Meng, Shuang Huang, Zhongbing Lin
Summary: By modifying rice straw biochar with KMnO4, its adsorption capacity was significantly improved, especially during co-aging with soil. Modified biochar always had higher adsorption capacity than unmodified biochar after aging processes, and its dominant adsorption mechanism was precipitation and adsorption with minerals.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Zhuowen Meng, Shuang Huang, Zhongbing Lin, Wenting Mu, Haimeng Ge, Daoyou Huang
Summary: This study quantified the long-term immobilization of Cd by biochar and its potential risk in soils with different pH levels under a simulated aging process. The results showed that biochars had a positive effect on Cd immobilization in acidic and neutral soils, but had negative effects in alkaline soil.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Rong Tang, Xudong Han, Xiugui Wang, Shuang Huang, Yihui Yan, Jiesheng Huang, Tao Shen, Youzhen Wang, Jia Liu
Summary: Controlled drainage by regulating the groundwater level in open ditches is necessary for the normal growth of crops in the Northern Huaihe River Plain, China. The study found that proper drainage measures can alleviate drought and waterlogging issues in the region.
Article
Engineering, Environmental
Zhuowen Meng, Shuang Huang, Ting Xu, Zhongbing Lin, Jingwei Wu
Summary: This study investigated the competition, immobilization, and desorption of Cd, Ni, and Cu in saturated-unsaturated soils treated with original and KMnO4-modified biochars. The results showed that modified biochar had improved immobilization effects and maintained the most stable remediation effects. However, for Ni and Cu, the biochar application reduced the residual fraction and increased desorption by citric acid.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Agronomy
Rong Tang, Xiugui Wang, Xudong Han, Yihui Yan, Shuang Huang, Jiesheng Huang, Tao Shen, Youzhen Wang, Jia Liu
Summary: Open-ditch controlled drainage is an important water management measure that reduces drought and waterlogging stress, promotes crop yield, decreases drainage discharge, and minimizes water pollution. A simulation model was developed to assess the effects of different control schemes on crop yield and drainage in an area in China. The results provide practical implications for improving crop yield and reducing farmland drainage in similar regions.
Article
Environmental Sciences
Zhuowen Meng, Shuang Huang, Zhongbing Lin, Jingwei Wu
Summary: This study investigated the behaviors and mechanisms of Cd adsorption and immobilization by biochar in unsaturated soils, and found that the adsorption behavior of Cd in unsaturated soils is different from that in aqueous solutions.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Zhuowen Meng, Shuang Huang, Jingwei Wu, Zhongbing Lin
Summary: This study investigated the competitive adsorption and immobilization of cadmium (Cd), nickel (Ni), and copper (Cu) by biochar in unsaturated soils under single-, binary-, and ternary-metal systems. The results showed that the immobilization effects by the soil itself were in the order of Cu > Ni > Cd, and the adsorption capacities of freshly contaminated heavy metals by biochar were in the order of Cd > Ni > Cu in unsaturated soils. The adsorption and immobilization of Cd by biochars in soils was weakened by competition more in the ternary-metal system than that in the binary-metal system; the competition with Cu caused a more significant weakening effect than that with Ni. For Cd and Ni, nonmineral mechanisms preferentially adsorbed and immobilized Cd and Ni compared to mineral mechanisms, but the contributions of the mineral mechanisms to the adsorption gradually increased and became dominant with increasing concentrations (at average percentages of 62.59%-83.30% and 41.38%-74.29%, respectively). However, for Cu, the contributions of the nonmineral mechanisms to Cu adsorption were always dominant (average percentages of 60.92%-74.87%) and gradually increased with increasing concentrations. This study highlighted that the types of heavy metals and coexistence should be focused when remediating heavy metal contamination in soils.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Environmental Sciences
Zhuowen Meng, Shuang Huang, Wenting Mu, Jingwei Wu, Zhongbing Lin
Summary: In this study, the transport and immobilization of cadmium (Cd) on passivators (biochar, organic fertilizer) and soils under different conditions were analyzed independently. The adsorption capacity of Cd by biochar and organic fertilizer was comparable in acidic soils, but in alkaline soils, organic fertilizer had a significantly higher adsorption capacity. In acidic soils, passivators effectively immobilized Cd, with the combination treatment showing the highest immobilization effect. In alkaline soils, all treatments had negative effects on Cd immobilization as Cd became more activated in the soil. Therefore, considering soil conditions is crucial when using biochar and organic fertilizers for Cd remediation.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Environmental
Zhuowen Meng, Shuang Huang, David A. Laird, Jingwei Wu, Zhongbing Lin
Summary: This study investigated the effects of major environmental processes on biochar aging in field soils. The results showed that dry-wet cycling is the key environmental process, and leaching is the only process that produces positive outcomes. Modified biochar is more effective for Cd immobilization than pristine biochar. Therefore, combined environmental effects should be considered when assessing biochar aging in field soils.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
