Article
Environmental Sciences
Jia Li, Xuehai Chen, Songguo Yu, Min Cui
Summary: Adsorption is an efficient and eco-friendly technique for removing small pristine microplastics from water. However, it is unclear whether this technique is effective in removing large aged microplastics from water.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Jiangxin Xiang, Qintie Lin, Xiaosheng Yao, Guangcai Yin
Summary: The magnesium oxide biochar-chitosan composite modified with MgCl2 and chitosan demonstrated high Cd adsorption capacity and effective Cd stabilization in soil, reducing both bioavailable and acid-extractable Cd content while increasing residual Cd content. The synergistic effect of surface complexation and precipitation mechanisms played a major role in Cd removal, highlighting the potential of MgO-BCR-W as an effective and eco-friendly adsorbent for Cd remediation in water and soil environments.
ENVIRONMENTAL RESEARCH
(2021)
Article
Environmental Sciences
Qian Wang, Bing Wang, Yuena Ma, Xueyang Zhang, Wenqiang Lyu, Miao Chen
Summary: Heavy metals pollution in mining soils poses a serious threat to the ecological environment and human health worldwide. Phytoremediation and pyrolysis have been shown to be effective methods for stabilizing heavy metals in plants, reducing their toxicity to the environment and human body. Additionally, biochars produced from post-phytoremediation plant residues demonstrate excellent adsorption capacities for heavy metals.
ENVIRONMENTAL POLLUTION
(2022)
Article
Environmental Sciences
Zhe Wang, Yuan Bian, Yilin Xu, Chunli Zheng, Qinghong Jiang, Chunjiang An
Summary: This study investigated the changes in physicochemical properties and in situ adsorption performance of biochar during aging processes. The results showed that aging treatments reduced the adsorption performance of Cd2+ due to changes in ash content and pH value. The adsorption capacity of different biochars varied after aging, which was closely related to the changes in the content of oxygen-containing functional groups.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Biotechnology & Applied Microbiology
Xinyue Li, Tianyi Wang, Yilin Li, Tonglinxi Liu, Xiulan Ma, Xing Han, Yujun Wang
Summary: The effects of aging on the adsorption capacity of Pb and Cd by maize stover biochar were studied. Aging decreased the pH, ash, and aromaticity of the biochar, while increasing its polarity, oxygenated functional groups, specific surface area, and average pore size. The sorption behavior of Pb2+ and Cd2+ could be explained by quasi-second-order kinetics and the Langmuir equation. The maximum adsorption of Pb2+ and Cd2+ was higher in a single metal system compared to a binary metal system, indicating a competitive relationship. The mechanisms for removing Pb2+ and Cd2+ by aged biochar included pore filling, electrostatic adsorption, ion exchange, mineral precipitation, pi-pi interaction, and surface complexation.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2023)
Article
Biotechnology & Applied Microbiology
Xinyue Li, Tonglinxi Liu, Xing Han, Yilin Li, Xiulan Ma
Summary: In this study, peanut shells were used to prepare biochar, which was then aged using artificial simulated aging. The effectiveness of biochar for the removal of Pb and CIP, both individually and simultaneously, was investigated. Different aging methods were employed to study the physicochemical properties of the biochar. The results showed that aging inhibited the adsorption of ciprofloxacin on biochar, while the effect on Pb adsorption was insignificant. The study highlights the importance of considering regional climatic factors and target pollutant species when using biochar for pollutant removal.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2023)
Article
Environmental Sciences
Dan Xing, Hongguang Cheng, Zengping Ning, Yizhang Liu, Shan Lin, Yongfu Li, Xi Wang, Paul Hill, Dave Chadwick, Davey L. Jones
Summary: The present study investigates the effects of field aging on biochar to reduce cadmium uptake in pepper plants. The results show that field aging decreases the potential of biochar to lower heavy metal bioavailability, and fresh biochar has a better ability to reduce cadmium content in plants.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Environmental Sciences
Xiaoya Huang, Peng Lyu, Lianfang Li, Jinni Xie, Changxiong Zhu
Summary: The aging process of modified biochar affects its physicochemical properties and adsorption capacity for As(V). Freeze-thaw and dry-wet aging treatments improve the adsorption capacity, while natural aging has a smaller effect. Aging increases the specific surface area and oxygen-containing functional groups of modified biochar.
ENVIRONMENTAL RESEARCH
(2022)
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
Multidisciplinary Sciences
Liqiang Cui, Qinya Fan, Jianxiong Sun, Guixiang Quan, Jinlong Yan, Kiran Hina, Hui Wang, Zhiqiang Zhang, Qaiser Hussain
Summary: The formation of Fenton-like system in a natural soil environment is considered significant in the aging process of biochar. Aged biochars have improved surface properties and increased adsorption capacity for 2,4,6-trichlorophenol (2,4,6-TCP), making them useful for soil improvement. The aged biochar contains abundant functional groups that are associated with its enhanced adsorption behavior, indicating potential value for long-term remediation of organically polluted soils.
SCIENTIFIC REPORTS
(2021)
Article
Environmental Sciences
Zhuowen Meng, Ting Xu, Shuang Huang, Haimeng Ge, Wenting Mu, Zhongbing Lin
Summary: This study investigated the effects of competitive adsorption with Ni(II) and Cu(II) on the adsorption of Cd(II) by modified biochar co-aged with acidic soil. The results showed that competitive adsorption weakened the improvement of modification on the adsorption performance of modified biochar. Co-aging with soil further decreased the adsorption capacities of biochars for Cd(II).
Article
Environmental Sciences
Yuxin Ke, Song Cui, Qiang Fu, Rupert Hough, Zulin Zhang, Yi-Fan Li
Summary: This study investigated the effects of pyrolysis temperature and aging treatment on the adsorption performance of coffee grounds biochar (CGB) for Cd2+ and Zn2+. The results showed that the adsorption performance of fresh CGB increased with increasing pyrolysis temperature, while the adsorption performance of aged CGB peaked at medium pyrolysis temperature and decreased at higher temperatures. The XRD results indicated that the graphitization degree of CGB increased with pyrolysis temperature, leading to improved environmental stability. EDS and FTIR results suggested that ion-exchange and complexation played a dominant role in the adsorption processes, and the aging treatment improved the selectivity for Cd2+.
Article
Chemistry, Analytical
Can Wu, Yi Yang, Yaping Zhong, Yan Guan, Qingqing Chen, Wenping Du, Guo Liu
Summary: This study evaluated the effect of bio-CaCO3 on the immobilization ability of biochar for the cationic heavy metal lead and the anionic heavy metal antimony. The addition of bio-CaCO3 significantly improved the passivation ability of Pb and Sb and reduced their migration in the soil. Mechanistic studies showed that the enhanced ability of biochar to immobilize heavy metals can be attributed to the precipitation and ion exchange of CaCO3, the formation of strong complexes with lead and antimony through polycondensation reactions, and the increased aromaticity and surface π-electron density of biochar.
ENVIRONMENTAL SCIENCE-PROCESSES & IMPACTS
(2023)
Article
Environmental Sciences
Jie Wang, Jiaqiang Liu, Luo Chang, Yuting Pan, Lulu Zhai, Zhenguo Shen, Liang Shi, Yahua Chen
Summary: This study investigates the effects of earthworm activity on the natural aging process of rice husk biochar. The results show that earthworm activity can accelerate the natural aging of biochar and alter its physicochemical characteristics and functions.
Article
Engineering, Environmental
Haowen Zou, Jiawei Zhao, Feng He, Zhong Zhong, Jinsheng Huang, Yulin Zheng, Yue Zhang, Yicheng Yang, Fang Yu, M. Asaad Bashir, Bin Gao
Summary: A novel biochar/iron oxide composite was successfully prepared by ball milling iron-laden biochar, showing fast kinetics and large adsorption capacity for Cr(VI) removal. The composite performed well under acidic pH conditions, but the presence of competition ions inhibited the removal efficiency.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
