Article
Environmental Sciences
Liangmei Rao, Yifu Zhu, Zhongshu Duan, Ting Xue, Xuemin Duan, Yangping Wen, Annamalai Senthil Kumar, Weiming Zhang, Jingkun Xu, Akbar Hojjati-Najafabadi
Summary: This study proposes a green approach to utilize biomass waste for carbon materials and successfully develops a portable, flexible, and low-cost sensing platform.
Article
Chemistry, Analytical
Jianqi Lv, Hongtao Xia, Qi Ren, Yang Wang, Yuting Liu, Zihao Feng, Yang Li, Yanjun Du, Yun Wang
Summary: Amino functionalized lotus seedpods-derived biochar (LSBC-NH2) was prepared using natural lotus seedpods as raw material and urea as nitrogen source through hydrothermal method for the removal of uranium (VI) from aqueous solution. LSBC-NH2 exhibited a thin sheet structure with a rough porous surface and cluster structure, and possessed good thermal stability. Kinetics, isotherms, and thermodynamics studies showed that the adsorption of uranium (VI) by LSBC-NH2 was a spontaneous, endothermic, and single-layer chemisorption process, with a maximum uranium (VI) adsorption capacity of 367.99 mg g(-1). The adsorption mechanism indicated that the adsorption process of LSBC-NH2 for uranium (VI) involved amino, carboxyl, and hydroxyl groups in LSBC-NH2.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2023)
Article
Environmental Sciences
Yuehui Tan, Xirui Wan, Xue Ni, Le Wang, Ting Zhou, Huimin Sun, Nong Wang, Xianqiang Yin
Summary: A novel chitosan-modified kiwi branch biochar (CHKB) was prepared as a low-cost adsorbent for the removal of Cd (II) from wastewater. The modification significantly improved the adsorption performance of kiwi biochar (KB), with mechanisms including cation exchange, electrostatic interaction, surface complexation, and precipitation involved in the sorption of Cd (II) on CHKB.
Article
Agricultural Engineering
Tingting Yang, Yingming Xu, Qingqing Huang, Yuebing Sun, Xuefeng Liang, Lin Wang, Xu Qin, Lijie Zhao
Summary: In this study, Fe/Zn-RBC and Fe/Zn-DBC adsorbents were successfully prepared for Cd(II) removal in water, showing significantly higher sorption capacities compared to unmodified RBC and DBC. The adsorption mechanisms of Fe/Zn-BC on Cd(II) may involve precipitation and chemical binding, providing potential applications in waste resource utilization.
BIORESOURCE TECHNOLOGY
(2021)
Article
Agricultural Engineering
Aihua Xiang, Zhennan Gao, Ke Zhang, Encheng Jiang, Yongzhi Ren, Mingfeng Wang
Summary: The study demonstrated that the biochar-based infiltration urea fertilizer has the potential for Cd(II) adsorption and urea slow release. The adsorption of Cd(II) fits better with the pseudo-second order model and is dominated by chemical adsorption. The functional groups containing oxygen and nitrogen play a significant role in Cd(II) adsorption.
INDUSTRIAL CROPS AND PRODUCTS
(2021)
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
Engineering, Chemical
Xiaojing Qin, Song Cheng, Baolin Xing, Chao Xiong, Guiyun Yi, Changliang Shi, Hongying Xia, Chuanxiang Zhang
Summary: MgCl2-modified biochar (MgC700) derived from cotton stem is prepared by microwave heating and shows excellent adsorption performance for Cd(II) and tetracycline (TC). The Cd(II) and TC adsorption capacity of MgC700 is 178.17 and 201.85 mg/g at pH of 5 and 6, respectively. The adsorption mechanisms involve precipitation, cation exchange, electrostatic attraction, and π-π interaction. MgC700 can be used as a low-cost adsorbent for Cd(II) and TC removal.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Environmental Sciences
Guanhai Mo, Jiang Xiao, Xiang Gao
Summary: A novel sludge-derived biochar (MNBC) was prepared by NaHCO3 activation and KMnO4 modification, which exhibited higher adsorption capacity and faster equilibrium time for Cd(II) compared to pristine biochar. MNBC had a maximum Cd(II) removal efficiency of 90.24% after 5 repeated experiments, and over 98% in different actual water bodies. It showed excellent Cd(II) adsorption performance in fixed bed experiments with a treatment capacity of 450 BV. The Cd(II) removal mechanism involved co-precipitation, complexation, ion exchange, and Cd(II)-pi interaction.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Environmental
Anyu Li, Wenzhan Ge, Lihu Liu, Yutong Zhang, Guohong Qiu
Summary: This study successfully synthesized an amine-functionalized magnesium ferrite-biochar composite and investigated its performance and mechanisms for removing or immobilizing heavy metals in wastewater and polluted soils. The mechanisms in wastewater treatment primarily involved complexation and ion exchange, while in soils polluted by heavy metals, immobilization was achieved through electrostatic attraction, precipitation, and complexation. This new type of biochar composite has shown effectiveness in simultaneously removing and immobilizing heavy metals in wastewater and soil.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Chemical
Yaru Li, Yanyan Liu, Caiying Liu, Li Feng, Shuao Yang, Yuxue Shan, Fei Xiao
Summary: In this study, MgO-loaded lotus stem biochar was used as an efficient adsorbent for the removal of Pb(II) and Cd(II) from aqueous solution. The adsorption capacities of MgO-loaded biochar were significantly higher than that of the original biochar. The adsorption process was found to be a chemisorption-based heat absorption reaction, and ion exchange mechanism was quantitatively confirmed as the main adsorption mechanism.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2023)
Article
Agricultural Engineering
Liheng Liu, Tiantian Yue, Rui Liu, Hua Lin, Dunqiu Wang, Baoxiang Li
Summary: The study found that biochar derived from co-pyrolysis of sewage sludge and calcium sulfate had good adsorption efficiency for Cd(II) in aqueous solution. The adsorption process was a multi-layer process dominated by chemisorption, with an increasing contribution from physisorption as the initial Cd(II) concentration increased. The Cd(II) removal process was divided into three stages, ultimately reaching dynamic equilibrium.
BIORESOURCE TECHNOLOGY
(2021)
Article
Environmental Sciences
Dezheng Sun, Fayong Li, Junwei Jin, Sangar Khan, Kamel Mohamed Eltohamy, Miaomiao He, Xinqiang Liang
Summary: This study investigates the modification of biochars using sodium phytate and its effect on the adsorption of Cd(II) from solutions. It was found that the modified biochars had higher adsorption capacities compared to raw biochars. The modification method increased the content of dissolved organic matter and carbonate in the biochars, leading to enhanced adsorption mechanisms. The contribution of co-deposition with dissolved organic matter to adsorption was particularly significant at low pyrolysis temperatures.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Na Zhang, Febelyn Reguyal, Sai Praneeth, Ajit K. Sarmah
Summary: A novel biochar-based magnetic nanocomposite (GSMB) was synthesized from white tea waste. The sorption properties and regeneration of GSMB for Pb(II) and Cd(II) were studied. The sorption process was dominated by chemisorption rather than physisorption, and Langmuir and Temkin models best described the sorption isotherms for Pb(II) and Cd(II) respectively. Iron oxides played a key role in the adsorption process, and the adsorption mechanisms involved surface electrostatic attraction and surface complexation. Among the regenerating agents, 0.1 M EDTA-2Na was the most effective for Pb(II) desorption. The adsorbent showed potential for reuse with approximately 54% of its adsorption capacity remained after three sorption-desorption cycles.
ENVIRONMENTAL POLLUTION
(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
Menglan Wu, Bo Liu, Jun Li, Xintai Su, Weizhen Liu, Xiaoqin Li
Summary: Pyrolysis of sludge to biochar immobilizes heavy metals and reduces the potential ecological risk. The adsorption capacity of Cd(II) by sludge biochar is affected by pH and the presence of coexisting cations and anions. Different properties formed by pyrolysis temperature result in variations in the adsorption mechanisms.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Ecology
Quan Chen, Guorui Xu, Zhifeng Wu, Peng Kang, Qian Zhao, Yuanqi Chen, Guangxuan Lin, Shuguang Jian
Article
Ecology
Weixin Zhang, Yuanqi Chen, Leilei Shi, Xiaoli Wang, Yongwen Liu, Rong Mao, Xingquan Rao, Yongbiao Lin, Yuanhu Shao, Xiaobo Li, Cancan Zhao, Shengjie Liu, Shilong Piao, Weixing Zhu, Xiaoming Zou, Shenglei Fu
ECOLOGY AND EVOLUTION
(2019)
Article
Forestry
Songze Wan, Zhanfeng Liu, Yuanqi Chen, Jie Zhao, Qin Ying, Juan Liu
Article
Ecology
Yuanqi Chen, Jianbo Cao, Jie Zhao, Jianping Wu, Xiaoming Zou, Shenglei Fu, Weixin Zhang
Article
Environmental Sciences
Jianbo Cao, Xinxing He, Yuanqi Chen, Yuping Chen, Yanju Zhang, Shiqin Yu, Lixia Zhou, Zhanfeng Liu, Chenlu Zhang, Shenglei Fu
SCIENCE OF THE TOTAL ENVIRONMENT
(2020)
Article
Biodiversity Conservation
Yuanqi Chen, Yanju Zhang, Jianbo Cao, Shenglei Fu, Shuijin Hu, Jianping Wu, Jie Zhao, Zhanfeng Liu
GLOBAL ECOLOGY AND CONSERVATION
(2019)
Article
Ecology
Shiqin Yu, Qifeng Mo, Yuanqi Chen, Yingwen Li, Yongxing Li, Bi Zou, Hanping Xia, Wang Jun, Zhian Li, Faming Wang
ECOLOGY AND EVOLUTION
(2020)
Article
Environmental Sciences
Yu Zhang, Cancan Zhao, Guoliang Chen, Jianlin Zhou, Zhang Chen, Zhixian Li, Jiawen Zhu, Tao Feng, Yuanqi Chen
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2020)
Article
Environmental Sciences
Tao Liu, Zhenshan Chen, Zhixian Li, Hao Fu, Guoliang Chen, Tao Feng, Zhang Chen
Summary: This study successfully obtained magnetic nano-Fe3O4 hydrochar from iron-rich plants for efficient removal of Cd contamination, demonstrating multiple Cd adsorption mechanisms through adsorption process.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Chemistry, Multidisciplinary
Tao Liu, Zhenshan Chen, Zhixian Li, Guoliang Chen, Jianlin Zhou, Yuanqi Chen, Jiawen Zhu, Zhang Chen
Summary: This study successfully enhanced the efficiency of cadmium removal and achieved rapid separation of biochar from water by modifying carbonate on the biochar surface, leading to increased Cd precipitates and dominant surface precipitation mechanism for Cd removal.
Article
Agronomy
Yuanqi Chen, Yanju Zhang, Jianbo Cao, Shenglei Fu, Jun Wang, Hans Lambers, Zhanfeng Liu
Summary: This study examines the effects of understory plant and overstory tree removal on fine root decomposition in different aged Eucalyptus plantations. The results show that understory removal affects the decomposition of lower-order roots, while tree removal has no effect. Stand age and root branch order significantly influence fine root decomposition and nutrient remaining.
Article
Environmental Sciences
Zhenshan Chen, Tao Liu, Jiefu Dong, Guoliang Chen, Zhixian Li, Jianlin Zhou, Zhang Chen
Summary: In this study, a composite material FMBC was prepared using adsorbed Fe/Mn ions Bacillus cereus ZNT-03, lotus seeds, and graphene oxide to treat Cr (VI). The results showed that FMBC had high-density micropores and excellent adsorption stability, making it a promising material for water treatment.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Forestry
Yuanqi Chen, Shengfu Chen, Bohan Zhang, Xiaotong Ma, Xiaotong Liu, Ying Huang, Yu Zhang
Summary: This study examines the decomposition and nutrient dynamics of leaf litter and fine roots in an urban forest in subtropical China. The results show that the leaf litter decomposition rate and nutrient mineralization rate are faster for Elaeocarpus decipiens compared to Cinnamomum officinarum. Soil microbial biomass has different effects on leaf litter decomposition and fine root decomposition. Elaeocarpus decipiens has higher leaf litter production and nutrient storage, suggesting faster decomposition rate and nutrient return.
Article
Plant Sciences
Yuanqi Chen, Yu Zhang, Shiqin Yu, Feng Li, Suping Liu, Lixia Zhou, Shenglei Fu
Summary: The study revealed that reforestation and forest type affected soil DOC (0-60 cm) and aggregate C (0-10 cm), but had no impact on ROC concentration. Castanopsis hystrix plantation may enhance soil C stability by physical protection in topsoil.
JOURNAL OF PLANT ECOLOGY
(2021)
Article
Forestry
Yuanqi Chen, Jianbo Cao, Lixia Zhou, Feng Li, Shenglei Fu
