Article
Engineering, Environmental
Shengnan Yuan, Jinyu Zhang, Zhongxin Tan
Summary: Modified silicate composite biochar prepared through magnetization and granulation can effectively fix the heavy metal cadmium in soil, increase wheat yield, and reduce cadmium content.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Environmental Sciences
Lulu Long, Na Huang, Xin Liu, Li Gong, Min Xu, Shirong Zhang, Chao Chen, Jun Wu, Gang Yang
Summary: In this study, an economical and environmentally friendly amorphous iron silicate (AIS) was prepared and found to have better remediation efficiency on Cd-contaminated soil compared to natural silicates. Plant experiments showed that AIS could effectively inhibit the absorption and accumulation of Cd2+ in garlic, reducing the potential ecological risk assessment of soil. The immobilization mechanism of Cd2+ by AIS includes electrostatic adsorption, co-precipitation, ion exchange, and complexation of surface functional groups.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Environmental Sciences
Jinyu Zhang, Zhongxin Tan, Qiaoyun Huang
Summary: The study found that the new biochar greatly improves the adsorption effect of cadmium in water, with a maximum adsorption capacity of 400 mg/g. The special structures in the biochar can react with cadmium to form stable complexes, providing more adsorption sites and strengthening the adsorption and passivation of cadmium in soil.
Article
Multidisciplinary Sciences
Michael Winter, Dominic C. Walter, Byungsul Min, Robby Peibst, Rolf Brendel, Jan Schmidt
Summary: The fast-firing step at the end of solar cell production lines can induce light-induced degradation effects on solar cells made on different silicon materials. This study focuses on the degradation phenomena of high-efficiency solar cells with poly-Si passivating contacts made on Ga-doped Czochralski-grown silicon (Cz-Si) under elevated temperatures. The degradation extent increases with temperature up to 140 degrees C, but decreases beyond that. The degradation primarily affects the short-circuit current and fill factor, with a lesser impact on the open-circuit voltage. The degradation in these solar cells is significantly lower compared to B-doped Cz-Si wafers. Additionally, prolonged illumination at elevated temperatures can lead to improved conversion efficiency and long-term stability.
SCIENTIFIC REPORTS
(2022)
Article
Engineering, Environmental
Fengrui Zhang, Li Wang, Yifan Wang, Yanmin Cao, Shenghua Zhang
Summary: This study prepared a new material CA@BC by modifying peanut shell biochar, which showed great potential in the remediation of eutrophic heavy metal-contaminated sediments. CA@BC exhibited high adsorption capacity for phosphorus and cadmium, and showed synergistic enhancement during synchronous adsorption. The adsorption mechanisms for phosphorus and cadmium during synchronous adsorption involved phosphate precipitation and inner sphere complexes. The results demonstrated that CA@BC could effectively immobilize active phosphorus and cadmium in sediments and maintain low concentrations of phosphorus and cadmium in the overlying water.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Wolfram Buss, Christian Wurzer, David A. C. Manning, Eelco J. Rohling, Justin Borevitz, Ondrej Masek
Summary: Mineral doping of biomass before pyrolysis can reduce carbon loss, lower the cost of carbon dioxide removal, and improve the nutrient value of biochar and the availability of phosphorus. This method not only offers a ready-to-implement carbon dioxide removal technology, but also addresses global phosphorus and potassium shortages.
COMMUNICATIONS EARTH & ENVIRONMENT
(2022)
Article
Engineering, Environmental
Huabo Gong, Zhongxin Tan, Kang Huang, Yuqian Zhou, Jiahui Yu, Qiaoyun Huang
Summary: The study successfully prepared a new type of silicate bonded biochar with good adsorption performance and separation and recovery characteristics by applying silicate gel materials to the preparation of biochar. The silicate bonded biochar maintained good mechanical properties after three rounds of soil remediation, with compressive strength remaining between 210 and 270 N. The total Cd and available Cd in the soil were significantly reduced, and both SBC and MSBC showed high rates of reuse and adsorption regeneration, effectively decreasing Cd content in wheat.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Environmental
Yatian Pan, Weiling Zhang, Yanping Shi, Owais Khan, Weijie Xu, Xiaocui Xie, Dan Liu
Summary: This study evaluated the physical characterization of biochar produced from lobster shells and straw through co-pyrolysis, and found that the biochar reduced cadmium content in contaminated soil and improved cadmium fixation. The co-pyrolysis process altered the physical properties of the resulting biochar compared to biochar derived solely from straw or lobster shells. Incorporating the biochar into soil significantly increased soil pH and electrical conductivity, while reducing the availability of heavy metals. The application of different biochars resulted in varying levels of reduced cadmium content in the soil, with the biochar produced from a 1:3 mass ratio of lobster shells to straw proving most effective.
ENVIRONMENTAL ENGINEERING SCIENCE
(2023)
Article
Environmental Sciences
Yong Liu, Long Wang, Chang Liu, Jie Ma, Xiaoxue Ouyang, Liping Weng, Yali Chen, Yongtao Li
Summary: The combination of biochar and iron minerals improves pollutant adsorption capacity. The study explored the mechanism of cadmium adsorption by biochar-iron oxide composites. The synergistic effect significantly improved the adsorption capacity of the composites. Stability between iron minerals and biochar was maintained through different interactions.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Review
Engineering, Environmental
Tianqi Liu, Yelly Lawluvy, Yang Shi, Joshua O. Ighalo, Yide He, Yongjun Zhang, Pow-Seng Yap
Summary: This review provides an overview of the sources and hazards of cadmium and lead in the environment, discusses the preparation methods of modified biochar for removing Cd and Pb, as well as the adsorption kinetics and mechanisms. Modified biochar has been proven more suitable for the adsorption of cadmium and lead, with various mechanisms including surface precipitation, surface complexation, ion exchange, chelation, electrostatic attraction, inner sphere complexation, redox, and physical adsorption.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Engineering, Environmental
Lu Wang, Hanrui Chen, Jizi Wu, Laibin Huang, Philip C. Brookes, Jorge L. Mazza Rodrigues, Jianming Xu, Xingmei Liu
Summary: The study investigated the interaction between biochar, microorganisms, and Cd remediation in paddy soil by conducting a 90-day microcosm experiment in Hunan, China. Results showed that MBB had better remediation efficiency under anaerobic conditions compared to SBB. Both composites caused changes in microbial communities, with MBB application slightly decreasing alpha diversity but increasing total bacteria population by 700% under aerobic conditions.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Environmental Sciences
Xi Liu, Wei Wang, Jinguang Xiao, He Zhang, Yi Zhang, Wu Xiao
Summary: This study aimed to explore the efficiency of magnetic hydroxyapatite loaded biochar (MHBC) in removing and passivating cadmium (Cd) in paddy soil. The results showed that MHBC effectively decreased bioavailable and total Cd content in the soil. It also had positive effects on Cd accumulation and yield of different rice cultivars. The use of MHBC was a promising remediation technology for Cd-contaminated paddy soil.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Feng Han, Shu-yu An, Lei Liu, Li-qi Ma, Ye Wang, Liu Yang
Summary: The addition of PBC improved soil nutrients, porosity, and water-holding capacity, promoted plant growth, and reduced the bioavailability of lead and cadmium in contaminated mining soil.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
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
Environmental Sciences
Tarawee Taweekarn, Worawit Wongniramaikul, Aree Choodum
Summary: A novel calcium silicate hydrate composite cryogel was prepared for efficient removal and recovery of phosphate pollutants, demonstrating excellent adsorption performance and environmental friendliness.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)