Article
Engineering, Chemical
Di Zhang, Kaihong Yan, Yanju Liu, Ravi Naidu
Summary: This study investigated the immobilization efficiency of different amendments on arsenic, cadmium, and copper in co-contaminated soil. The results showed that red mud and biochar significantly reduced the concentrations of cadmium and copper, while the reduction of arsenic was limited. Phosphate reduced the concentrations of cadmium and copper, but not arsenic. Soil pH was found to be a key factor in driving the changes in soil enzymatic activity. Further research is needed to develop an efficient method for simultaneously immobilizing arsenic, cadmium, and copper using modified or combined amendments.
Article
Engineering, Environmental
Tuan Nguyen Quoc, Jeong Wook Kim, Zahra Derakhshan Nejad, Thao Le Thanh, Myung Chae Jung
Summary: The effects of cost-effective amendments and their composites on remediating heavy metals-contaminated soils were investigated. It was found that the composite amendments effectively immobilized heavy metals, induced plant growth parameters, and improved the microbial diversity.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Environmental Sciences
Arwenyo Beatrice, Jac J. Varco, Andrew Dygert, Felix S. Atsar, Sabrina Solomon, Rooban Venkatesh K. G. Thirumalai, Charles U. Jr Jr Pittman, Todd Mlsna
Summary: This study compared the effectiveness of different methods in immobilizing lead in soil and found that biochar-supported phosphate showed the best results in reducing the mobility of lead in contaminated soil. The concentration of ammonium nitrate extractable lead in the amended soil was significantly lower, indicating that this method can reduce lead uptake by plants and minimize the potential for water contamination.
Article
Soil Science
Srimathie P. Indraratne, Gary M. Pierzynski, Lucas R. Baker, P. V. Vara Prasad
Summary: The study showed that nanoparticles can effectively remediate soil metal contaminations and promote plant growth. Nano-oxides of Al-O and Ti-O were more effective in remediating metals compared to Fe-O.
CANADIAN JOURNAL OF SOIL SCIENCE
(2021)
Article
Environmental Sciences
Chi Zhang, Jie Li, Yuxia Dai, Williamson Gustave, Weiwei Zhai, Zhong Zhong, Jianmeng Chen
Summary: Heavy metal pollution in soils poses a threat to food safety and human health. Calcium sulfate and ferric oxide are commonly used to immobilize heavy metals, but the effectiveness of a combined material of calcium sulfate and ferric oxide (CSF) in regulating the bioavailability of heavy metals in soils is unclear. This study conducted two soil column experiments to investigate the spatial and temporal variations of CSF immobilized Cd, Pb, and As. The results showed that CSF had a significant immobilization effect on Cd and Pb, with the immobilization range and depths increasing over time, while the effect on As was limited. These findings can guide the application of CSF in in-situ immobilization of heavy metals in soils.
Article
Engineering, Environmental
Guifang Wang, Guangchuan Liang, Huizhen Xiao, Jun Qiu, Haiyan Liu, Shaojian Ma, Sridhar Komarneni
Summary: In this study, dynamic column simulation experiments were conducted to compare the immobilization persistence of heavy metals in sulfide tailings by the addition of triethylenetetramine modified montmorillonite (TTA-Mt) and calcium-based montmorillonite (Ca-Mt) during a simulated 5-year study of acid rain leaching. The results showed that TTA-Mt had superior environmental stability and could persistently immobilize heavy metal ions, while Ca-Mt had little effect.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Environmental Sciences
Pengcong Wang, Junhui Xue, Zongmin Zhu
Summary: This study investigated the impact of particle sizes in urban sediments on the bioaccessibility of heavy metals in the human digestive system. It was found that clay minerals and Fe/Mn oxides in fine particles play a crucial role in absorbing and fixing heavy metals in the intestinal tract. Additionally, magnetic minerals formed during the digestion process may affect the bioaccessibility of metals in the gastrointestinal tract.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
Xin Qi, Jialei Gou, Xiaoming Chen, Shiqi Xiao, Imran Ali, Ran Shang, Dan Wang, Yuewen Wu, Mengwei Han, Xuegang Luo
Summary: The research demonstrated the positive effects of biochar pyrolyzed from various materials on soil properties and microbial activities, with corn stalk biochar showing the best improvement. Mixed bacteria MB9 composed of three strains effectively adsorbed U and Cd, and two types of MB9-loaded biochar demonstrated superior immobilization performance. These findings offer a feasible and cost-effective solution for remediating heavy metal contamination in farmland soil.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Multidisciplinary Sciences
Jose A. Siles, Inmaculada Garcia-Romera, Tomas Cajthaml, Jorge Belloc, Gloria Silva-Castro, Jirina Szakova, Pavel Tlustos, Mercedes Garcia-Sanchez
Summary: The application of biochar made from olive residue can enhance the functionality and abundance of microbial communities in metal-contaminated soils. Biochar amendment increases microbial abundances and has different effects on enzyme activities depending on the pyrolysis temperature and application dose. Inoculation with arbuscular mycorrhizal fungi promotes the growth of AMF community and results in increased soil glomalin content and AMF root colonization rates.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Multidisciplinary
Yilin Yang, Xiaojun Hu, Huifeng Wang, Xinling Zhong, Kaishan Chen, Biao Huang, Chunxiang Qian
Summary: This study successfully immobilized Cd in soil using corncob biochar loaded with Bacillus subtilis. The 400 degrees C-CB@B demonstrated outstanding efficiency and durability in immobilizing Cd, providing a safe habitat for the bacteria and contributing to a synergistic effect.
Article
Environmental Sciences
Di Zhang, Aifang Ding, Ting Li, Xiaoxia Wu, Yanju Liu, Ravi Naidu
Summary: The study found that the application of hydroxyapatite, bentonite, and biochar significantly increased the residual fraction of Cd and Pb in soil, reducing their mobility, bioavailability, and bioaccessibility. However, the immobilization efficiency of these three amendments decreased over time.
JOURNAL OF SOILS AND SEDIMENTS
(2021)
Article
Environmental Sciences
Olugbenga T. Fajemila, Michael Martinez-Colon, Ivory Council, Silvia Spezzaferri
Summary: The Apapa and Badagry creeks in Nigeria have been heavily impacted by long-term human activities, resulting in the destruction of mangroves, urban expansion, and industrialization. This uncontrolled development has led to the release of untreated effluents and wastes, leading to degradation of sediment and water quality. The study shows that the highest degree of pollution occurs in the area north of Tincan Island, where potentially toxic elements (PTEs) are deposited. The presence of PTEs negatively impacts foraminiferal distribution and diversity, especially in the most polluted sediments.
MARINE POLLUTION BULLETIN
(2022)
Article
Environmental Sciences
Huawei Wang, Zijuan Lv, Ya-nan Wang, Yingjie Sun, Yiu Fai Tsang
Summary: The study shows that biogenic hydroxyapatite (HAP) recycled from chicken waste can effectively remove Pb(II) from wastewater, achieving over 99% removal efficiency under specific operational conditions. Additionally, the presence of coexisting divalent ions has no significant impact on Pb(II) removal.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Environmental Sciences
Ying Zhang, Qinghong Sun, Jianmin Wang, Yuexuan Ma, Bo Cao
Summary: This study found that the addition time of activated carbon during chicken manure composting can affect the mobility of heavy metals, with the addition of activated carbon during the thermophilic period effectively reducing the mobility of heavy metals. High-throughput sequencing analysis revealed the dominant and abundant bacterial communities in compost samples, mainly including Proteobacteria, Firmicutes, etc. Redundancy analysis showed the impact of dominant bacteria on the mobility of heavy metals in activated carbon amended compost.
ENVIRONMENTAL POLLUTION
(2021)
Article
Environmental Sciences
Chengpeng Yuan, Baolin Gao, Yutao Peng, Xing Gao, Beibei Fan, Qing Chen
Summary: A detailed analysis was conducted on the effects of biochar application in remediation of heavy metal-polluted soils, revealing that biochar aging can influence the changes in heavy metal bioavailability, with factors such as soil pH, texture, aging time, and pyrolysis temperature playing significant roles. Different impacts of biochar application and aging on heavy metal bioavailability were observed in various types of soils.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
Weiping Cai, Yujun Wang, Yu Feng, Peng Liu, Shuofei Dong, Bo Meng, Hua Gong, Fei Dang
Summary: This study developed a standardized protocol using single particle inductively coupled plasma-mass spectrometry to extract and quantify nanoparticulate mercury in different soils. The study found a significant presence of indigenous Hg-NPs in soils, accounting for 3-40% of the total mercury mass.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Environmental
Ping Wu, Peixin Cui, Ying Zhang, Marcelo Eduardo Alves, Cun Liu, Dongmei Zhou, Yujun Wang
Summary: Engineered biochar loaded with MnOx from a Mn-hyperaccumulator species showed significantly enhanced Cd sorption capacity, with spectroscopic techniques and experiments elucidating the sorption mechanisms. Leaching of Mn was lower, Cd sorption was higher, and sorption was mainly through association with organic matter, carbonate, and MnOx. This sustainable and effective material proved to be an eco-friendly solution for remediating Cd-contaminated waters.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Engineering, Environmental
Yingnan Huang, Fei Dang, Yongguang Yin, Guodong Fang, Yujun Wang, Guanghui Yu, Dongmei Zhou, Baoshan Xing
Summary: Microplastics (MPs) are commonly found in the environment, and research has shown that they can alter the chemical speciation of coexisting contaminants. This study demonstrates that upon solar irradiation, polystyrene (PS) is able to photoreduce dissolved silver (Ag(I)) to metallic silver nanoparticles (Ag(0)-NPs), with carbonyl groups on weathered PS playing a key role in the reduction process. These findings reveal the chemical reactivity of weathered PS and highlight the potential impact of microplastics in the natural environment.
ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS
(2022)
Article
Environmental Sciences
Huijun Yan, Shiyu Yin, Fei Dang, Min Li, Dongmei Zhou, Yujun Wang
Summary: The buildup of silver nanoparticles in soil has raised concerns about their impact on human health. This study used a physiologically based extraction test to assess the bioaccessibility of silver nanoparticles in soil and in earthworms. The results showed that earthworms had higher bioaccessibility of silver compared to the soil, and the particle size decreased upon direct exposure but remained constant upon indirect exposure.
BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY
(2022)
Article
Environmental Sciences
Tongliang Wu, Xiaodan Cui, Syed Tahir Ata-Ul-Karim, Peixin Cui, Cun Liu, Tingting Fan, Qian Sun, Hua Gong, Dongmei Zhou, Yujun Wang
Summary: This study investigates the effects of two common irrigation methods, alternate wetting and drying and continuous flooding, on the accumulation of antimony (Sb) in rice. The results show that continuous flooding immobilizes more Sb in soil, but facilitates Sb accumulation in rice. The findings contribute to the understanding of Sb speciation and behavior in soils with different water management regimes.
Article
Engineering, Environmental
Yu Zeng, Guodong Fang, Qinglong Fu, Fei Peng, Xinghao Wang, Dionysios D. Dionysiou, Jianbo Guo, Juan Gao, Dongmei Zhou, Yujun Wang
Summary: This study investigated the effects of agricultural amendments on the photochemistry of paddy water, revealing that these amendments significantly influenced the photogenerated reactive intermediates and the degradation rate of organic contaminants. Additionally, the amendments led to the formation of more toxic and stable products.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Environmental
Peixin Cui, Cun Liu, Xiaozhi Su, Qiang Yang, Liqiang Ge, Meiying Huang, Fei Dang, Tongliang Wu, Yujun Wang
Summary: Phytoremediation is an environmentally friendly and cost-effective method for environmental pollution remediation. However, the utilization of harvested biomass poses challenges in practical applications. This study presents a novel approach using a manganese-carbon-based single-atom catalyst method to enhance the potential utilization of biomass for phytoremediation and demonstrates its high efficiency and stability in the degradation of organic pollutants.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Environmental
Tongliang Wu, Peixin Cui, Meiying Huang, Cun Liu, Fei Dang, Zimeng Wang, Marcelo Eduardo Alves, Dongmei Zhou, Yujun Wang
Summary: Antimony trioxide dissolution is catalyzed by manganese and the oxidation of manganese plays a critical role in antimony release. The released antimony is partially retained on manganese oxides as bidentate-binuclear complexes. Valentinite exhibits higher activity in catalyzing manganese oxidation and faster dissolution compared to senarmontite.
Article
Geochemistry & Geophysics
Jiahui Gu, Yufang Sun, Tongliang Wu, Zhen Zeng, Qian Sun, Cun Liu, Yujun Wang
Summary: This study proposes a widely applicable soil acid digestion method for determining zinc isotope in soil samples. The recovery rate of zinc was found to be 99-100% using this method. The method was used to analyze soil samples from different regions, providing a range of zinc isotope compositions. These findings are important for data comparison and calibration between laboratories, as well as for future studies on zinc isotopes.
GEOSTANDARDS AND GEOANALYTICAL RESEARCH
(2022)
Article
Soil Science
Ting-Ting Fan, Qian Sun, Pei-Xin Cui, Liang Xuan, Yu-Jun Wang
Summary: Soil cadmium (Cd) contamination is a global environmental issue, and its chemical reactivity and bioavailability are closely related to soil properties. This study integrates batch sorption experiments, statistical analysis, and EXAFS spectroscopy to investigate the sorption mechanism of Cd(II) in different soils and its relationship with soil properties. The results indicate that Cd(II) sorption capacity is influenced by pH, metal (hydro)oxides, organic matter, and cation exchange capacity. Soil pH is identified as the most critical factor connecting Qmax with soil properties. EXAFS results suggest that Cd(II) in soils is mainly bound to metal (hydro)oxides or exists as CdCO3 precipitate. These findings provide a theoretical basis for predicting the risk of soil Cd contamination.
Article
Engineering, Environmental
Qiang Yang, Weixuan Wang, Yiyi Zhou, Jiachen Hao, Guodong Fang, Cun Liu, Peixin Cui, Yujun Wang
Summary: High-performance, environmentally friendly, and low-cost single-atom catalysts (SACs) show great potential in the degradation of organic contaminants using peroxymonosulfate (PMS). A novel manganese single-atom catalyst (SPBC-700N) was successfully synthesized using Phytolacca americana as a precursor through one-step pyrolysis. The SPBC-700N exhibited extraordinary catalytic activity for PMS activation, leading to over 90% removal of chloroquine phosphate (CQP) within 30 minutes. The excellent catalytic performance of the Mn SAC/PMS system is attributed to the maximized utilization of manganese atoms and the synergistic effect with neighboring pyrrolic nitrogen sites.
ACS ES&T ENGINEERING
(2023)
Article
Engineering, Environmental
Qian Sun, Edward D. Burton, Dunfeng Si, Tingting Fan, Hu Cheng, Zhenghong Yu, Xiaohou Shao, Peixin Cui, Yujun Wang
Summary: Iron (oxyhydr)oxides and organic matter are closely associated in natural environments, and their fate can be influenced by sulfur cycling. Sulfur preferentially reacts with iron (oxyhydr)oxides to form inorganic sulfur, indirectly affecting the fate of organic matter. During the oxidation stage, previously formed iron (II) species are reoxidized to iron oxides, recapturing released organic matter.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Review
Environmental Sciences
Ping Wu, Bhupinder Pal Singh, Hailong Wang, Zhifen Jia, Yujun Wang, Wenfu Chen
Summary: This study conducted a bibliometric analysis to visualize the current status and trends of biochar research. The results showed a significant increase in the number of publications in 2021, with China and the USA being the most contributing countries. The main research trends and hotspots in 2021 included toxic metal immobilization, biofuel production catalysts, climate change mitigation, salinity and drought stress amelioration, composting amendment, and anaerobic digestion additives. The study also proposed future research directions for the green and sustainable applications of biochar.
Article
Environmental Sciences
Hao Chen, Jiahui Yuan, Guanglei Chen, Xu Zhao, Shenqiang Wang, Dengjun Wang, Lei Wang, Yujun Wang, Yu Wang
Summary: The addition of biochar can decrease the concentration of soluble phosphorus and iron in the flooded rice rhizosphere, reducing the risk of phosphorus release and enhancing soil phosphatase activity.
Article
Chemistry, Multidisciplinary
Tai Li, Peixin Cui, Xiaolei Wang, Cun Liu, Yu Zeng, Guodong Fang, Yuan Zhao, Juan Gao, Yujun Wang, Dongmei Zhou
Summary: In this study, a novel cobalt-doped C3N5 material was developed for efficient and stable activation of PMS to degrade organic pollutants. The activation mechanism was elucidated using various characterization techniques, and the results showed that Co-C3N5 exhibited excellent catalytic performance with high stability and wide pH adaptability.
ENVIRONMENTAL SCIENCE-NANO
(2022)
