Article
Environmental Sciences
Benjamin Malvoisin, Fabrice Brunet
Summary: A review of H2-rich gases in continental rocks found that they are mainly located near orogenic gold deposits. Two types of geomorphological features, barren ground depressions and small white spots, were observed near orogenic gold deposits. Point pattern analysis revealed that the white spots are self-organized, similar to vegetation patterns associated with termite mounds and fairy circles. A geochemical model was proposed to explain the relationship between orogenic gold deposits, H2 emanations, and geomorphological features.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Materials Science, Multidisciplinary
Junwoo Park, Hyeonwoo Park, Dereje Degefa Geleta, Wan Ho Kim, Joonho Lee
Summary: X-ray radiographic technique was used to investigate slag holdup in a fixed bed of SiC particles at 1773K, revealing that liquid slag droplets started dripping through bottom holes of the graphite crucible at 1718K and stopped after holding the sample at 1773K for 63 minutes. The estimated slag holdup was 4.25%, which closely matched a recent CFD-DEM simulation result.
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
(2021)
Article
Agriculture, Multidisciplinary
Maria T. Cieschi, Juan J. Lucena
Summary: Iron humate participates in the chelate shuttle mechanism, providing available Fe to the chelating agent and then to the plants, showing a slight synergic effect. After a few days, the contribution of the chelates to the Fe nutrition decreases substantially, but the contribution of the humates is maintained. The most efficient ratio was two parts of iron humates and one part of iron chelate. Specifically, HBED/Fe3+ was the most suitable iron chelate because its lasting effect fits the iron humate long-term effect better.
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
(2021)
Article
Agricultural Engineering
Jing Zhang, Zhongran Wu, Yanghua Huang, Xinmin Zhan, Youchi Zhang, Chao Cai
Summary: In this study, an industrial-scale composting experiment was conducted to treat swine manure with the addition of 5% yellow phosphorus slag (YPS), using a semi-permeable membrane for cover. The changes in temperature, compost quality, and phosphorus (P) speciation were monitored for 27 days. The results showed that the temperature of the compost pile sharply increased on day 2, indicating a thermophilic period of 15 days. The dynamic changes in germination index (GI), pH, nutrient contents, etc. were similar to those of conventional composting process. The distribution of P in the composting products also underwent changes, with an increase in total P and citric acid extracted P (CAP), and a decrease in Olsen-P. The dominant fraction of P in the product was HCl extracted inorganic P (HCl-Pi), which showed an increasing trend during composting. These findings suggest that industrial-scale composting with the novel YPS additive is feasible and can result in compost products with abundant slowly released P.
BIORESOURCE TECHNOLOGY
(2023)
Article
Energy & Fuels
Ji Wang, Lingxue Kong, Jin Bai, Kang Xue, Xiaolong Zhu, Yongdong Luo, Xiaopeng Zhao, Huaizhu Li, Zhenxing Guo, Zongqing Bai, Wen Li
Summary: The formation of residual char in slag from anthracite gasification in moving bed slagging gasifier mainly depends on the low reactivity of anthracite, unreacted limestone, and high molten slag level.
Article
Agricultural Engineering
Tao Liu, Mukesh Kumar Awasthi, Minna Jiao, Sanjeev Kumar Awasthi, Shiyi Qin, Yuwen Zhou, Huimin Liu, Ji Li, Zengqiang Zhang
Summary: This study investigated the fungal diversity and relative abundance during pig manure composting with the addition of FCGS as an additive. The 10% FCGS treatment showed higher fungal abundance compared to other treatments. Results suggest that FCGS could enhance composting quality by improving fungal diversity and increasing total nitrogen content.
BIORESOURCE TECHNOLOGY
(2021)
Article
Agronomy
Ashfaq Ahmad Rahi, Muhammad Akbar Anjum, Javed Iqbal Mirza, Saleha Ahmad Ali, Theodore Danso Marfo, Shah Fahad, Subhan Danish, Rahul Datta
Summary: The study demonstrated that increasing potassium humate significantly improved the yield, total biomass, and harvesting index of tomatoes, while enhancing iron uptake. The research indicated that in both autumn and spring seasons, potassium humate and micronutrient mixture had significant effects on the growth of tomatoes.
Article
Thermodynamics
Shuai Wang, Zhi Wen, Ruifeng Dou, Yongli Xiao, Yunze Guan, Xunliang Liu
Summary: The slag mixing technique eliminates the lumping phenomenon in iron desulfurization slag by mixing high-temperature converter slag and iron desulfurization slag. A numerical model based on Eulerian multiphase flow and a simplified temperature dropping model based on the principle of energy conservation were established. The simplified model effectively predicts the chemical reaction rate and temperature change.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Oceanography
Mitsuo Yamamoto, Aigo Takeshige, Akira Yamaguchi, Dan Liu, Shingo Kimura
Summary: This study investigates the environmental conditions influencing the distribution of seaweed beds in the Tsushima Islands, Japan, focusing on the influence of terrestrial and oceanic waters. The results show that the materials supplied from terrestrial areas are not the primary factors determining the seaweed bed distribution, while the contribution of oceanic particulate organic matter is more significant. The study also suggests that the characteristics of the marine environment potentially influence the distribution of seaweed beds in the Tsushima Islands.
CONTINENTAL SHELF RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
Shuai Wang, Guang Li, Yufeng Guo, Feng Chen, Jianfa Jing, Jinlai Zhang, Lingzhi Yang, Guanzhou Qiu
Summary: In this study, the effects of MnO on the electric furnace smelting of vanadium titanomagnetite pre-reduced pellets were systematically investigated. The results showed that the addition of MnO in appropriate amounts could reduce the viscosity of titanium slag, promote the separation of iron from the slag, and improve the reduction degree of vanadium oxides.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Biotechnology & Applied Microbiology
Lan Huong Nguyen, Huu Tap Van, Quoc Nguyen Ngo, Van Nam Thai, Van Hung Hoang, Nguyen Thi Thanh Hai
Summary: The study demonstrates that the use of magnetic waste iron slag composite as a catalyst enhances the heterogeneous catalytic Fenton of Rhodamine B. The enriched Fe content in MIS-10 significantly improves the catalytic efficiency of RhB degradation and oxidation under optimal conditions. MIS-10 exhibits high stability and promising catalytic activity for the oxidation of persistent organic compounds in wastewater.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Construction & Building Technology
Saeid Ghorbani, Yubo Sun, Manu K. Mohan, Stijn Matthys
Summary: Reusing and recycling waste materials in construction can have positive impacts on the environment and economy. This study focuses on the use of three industrial by-products (metallurgical slags) - copper slag (CS), stainless steel slag (SS), and ground granulated blast furnace slag (GGBFS) - as solid precursors to produce binary blend alkali activated materials (AAMs). The behavior of the mixtures was analyzed in terms of flow spread, compressive and flexural tensile strengths, porosity, and water absorption. Partially replacing GGBFS with CS or SS improved workability properties of the mixture, but reduced its strength. However, the 28-day compressive strength of the studied mixtures remained higher than 50 MPa. The capillary porosity of the specimens increased with higher contents of CS or SS. The water absorption results were influenced by the drying temperature used in the test method. Overall, replacing GGBFS with CS or SS up to 50% showed promise.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Green & Sustainable Science & Technology
Paul Kwangho Kwon, Hyung-Suek Kim, Sung Woo Jeong
Summary: Blue carbon ecosystems play a crucial role in global carbon sequestration. This study demonstrates that providing seaweed with an iron source can enhance its growth and carbon conversion into biomass. The use of steel slag and its chelating agent significantly increased photosynthetic pigment levels and seaweed weight without any toxic effects. The findings suggest that steel slag-DTPA pellet treatment could contribute to sea forestation and the sequestration of blue carbon.
Article
Green & Sustainable Science & Technology
Lei Zhang, Yang Jia, Hao Shu, Lei Zhang, Xi Lu, Fang Bai, Qianyu Zhao, De Tian
Summary: This study focused on preparing blast furnace slag (BFS) as a denitration catalyst, and investigated the effect of alkalinity on denitrification performance after modifying BFS with different alkaline and acidic oxides. The results showed that alkaline oxides modification improved denitration performance by generating -OH, while acidic oxides modification absorbed f-CaO in the slag and did not enhance denitrification. Increasing alkalinity of modified GGBS led to improved denitration performance.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Materials Science, Multidisciplinary
Sarina Bao, Merete Tangstad, Kai Tang, Kristian Etienne Einarsrud, Martin Syvertsen, Morten Onsoien, Artur Kudyba, Sergey Bublik
Summary: This study aims to develop a methodology to study the wetting behavior of two immiscible liquids at high temperatures and investigate the influencing parameters. The results indicate that the wetting between slag and FeMn alloy is relatively stable at temperatures up to 100 K above their melting points.
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
(2021)
Article
Environmental Sciences
Yoshishige Kawabe, Takeshi Komai
BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY
(2019)
Article
Geosciences, Multidisciplinary
Batdemberel Bayanzul, Kengo Nakamura, Isao Machida, Noriaki Watanabe, Takeshi Komai
HYDROGEOLOGY JOURNAL
(2019)
Article
Multidisciplinary Sciences
Noriaki Watanabe, Kiyotoshi Sakaguchi, Ryota Goto, Takahiro Miura, Kota Yamane, Takuya Ishibashi, Youqing Chen, Takeshi Komai, Noriyoshi Tsuchiya
SCIENTIFIC REPORTS
(2019)
Article
Chemistry, Multidisciplinary
Jiajie Wang, Noriaki Watanabe, Atsushi Okamoto, Kengo Nakamura, Takeshi Komai
JOURNAL OF CO2 UTILIZATION
(2019)
Article
Chemistry, Physical
Jiajie Wang, Noriaki Watanabe, Atsushi Okamoto, Kengo Nakamura, Takeshi Komai
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2019)
Article
Engineering, Civil
Yasuhide Sakamoto, Fuyuki Kaneko, Yusuke Nakano, Kengo Nakamura, Takeshi Komai
INTERNATIONAL JOURNAL OF OFFSHORE AND POLAR ENGINEERING
(2019)
Article
Energy & Fuels
Noriaki Watanabe, Kohei Saito, Atsushi Okamoto, Kengo Nakamura, Takuya Ishibashi, Hanae Saishu, Takeshi Komai, Noriyoshi Tsuchiya
Article
Geochemistry & Geophysics
Takahiro Watanabe, Noriyoshi Tsuchiya, Shin-ichi Yamasaki, Yuki Sawai, Norihiro Hosoda, Fumiko W. Nara, Toshio Nakamura, Takeshi Komai
APPLIED GEOCHEMISTRY
(2020)
Article
Chemistry, Physical
Jiajie Wang, Noriaki Watanabe, Atsushi Okamoto, Kengo Nakamura, Takeshi Komai
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2020)
Article
Engineering, Civil
Yasuhide Sakamoto, Fuyuki Kaneko, Yusuke Nakano, Kengo Nakamura, Takeshi Komai
INTERNATIONAL JOURNAL OF OFFSHORE AND POLAR ENGINEERING
(2020)
Article
Environmental Sciences
Arie Pujiwati, Jiajie Wang, Kengo Nakamura, Yoshishige Kawabe, Noriaki Watanabe, Takeshi Komai
Summary: This study investigated the effects of geological features and anthropogenic activities on element distribution in the Tohoku region of Japan. It found that geological features, especially igneous rock distribution, were the primary factor influencing elemental distribution, rather than human activities. The study also clarified the origins of toxic elements and revealed potential rare-earth element mineral resources in the region.
Article
Construction & Building Technology
Kengo Nakamura, Yuusuke Inoue, Takeshi Komai
Summary: Coal fly ash mixed with cement in concrete can significantly improve the physical properties and compressive strength. X-ray CT visualization of the 3D porosity distribution is crucial for evaluating the performance. Findings suggest that the moisture ratio plays a vital role in the porosity structure and long-term strength development of concrete containing coal fly ash.
JOURNAL OF BUILDING ENGINEERING
(2021)
Proceedings Paper
Energy & Fuels
J. Wang, K. Nakamura, N. Watanabe, A. Okamoto, T. Komai
2019 9TH INTERNATIONAL CONFERENCE ON FUTURE ENVIRONMENT AND ENERGY
(2019)