Article
Environmental Sciences
Sheng-Nan Zhang, Yi Gu, Zhen-Li Zhu, Sheng-Hong Hu, Peter M. Kopittke, Fang-Jie Zhao, Peng Wang
Summary: The analysis of Cd isotope ratios in soil, rice grain, and human urine samples from two Cd-contaminated regions in southern China revealed a preferential enrichment of heavy Cd isotopes from soil to rice grain and from grain to urine. The fractionation of Cd isotopes in the soil-rice-human continuum is likely due to processes such as partitioning between the soil solid phase and soil solution, as well as preferential enrichment by metal transporters in humans.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Daniel Bouchard, Patrick Hohener, Didier Gori, Daniel Hunkeler, Tim Buscheck
Summary: Several types of laboratory experiments were conducted to evaluate isotope fractionation caused by phase transfer process for a selection of common environmental contaminants. Carbon and hydrogen isotope fractionation caused by vaporization of non-aqueous phase liquid (NAPL), volatilization from water, and dissolution into an organic solvent (TGDE) were investigated. The results showed significant isotope fractionation during NAPL vaporization and volatilization from water, while no significant fractionation was observed during the air-TGDE partitioning process, except for certain compounds.
Article
Environmental Sciences
Young-Jae Jeong, Bo-Seong Seo, Nuri Baek, Jin-Hyeob Kwak, Sang-Mo Lee, Hyun-Jin Park, Woo-Jung Choi
Summary: This study proposed methods for determining the δN-15 of multiple nitrogen species. The methods included traditional distillation, direct evaporation, and isotope mass balance equation. The accuracy and precision of the methods were evaluated through a series of experiments, and the influences of different conditions on the analysis results were assessed.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2022)
Article
Engineering, Environmental
Weishen Zeng, Riming Lu, Dehan Wang, Lintong He, Zhaoyun Wu
Summary: In this study, an ultrafiltration pretreatment method was developed for building pig farm wastewater, effectively reducing the concentration and types of organics in the wastewater and meeting the discharge standards.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Environmental Sciences
Weishen Zeng, Jinrong Qiu, Dehan Wang, Zhaoyun Wu, Lintong He
Summary: In this study, ultrafiltration membrane technology was used to prepare ultrafiltration concentrated biogas slurry (UCBS) to reduce the risk of small-molecule organic pollution of groundwater during land application compared to raw biogas slurry (RBS). Both UCBS and RBS were found to cause nitrate pollution to groundwater, with UCBS having a lower risk of organic pollution. Irrigating UCBS in hydragric anthrosols posed a higher risk of organic pollution to groundwater than in acric ferralsols. Analysis showed that organic pollutants in the leaching solution were mainly small molecules <10 kDa, including fulvic acid, microbial protein metabolites, and humic acid organic compounds.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Geochemistry & Geophysics
S. Klemme, F. Genske, P. A. Sossi, J. Berndt, C. J. Renggli, A. Stracke
Summary: The new experimental results reveal fractionation of Cr isotopes during degassing of silicate melts. Lighter isotope Cr-52 is enriched in the gas phase and residual melt becomes enriched in the heavier Cr-53 isotope. This study provides important clues for understanding the recording of chromium isotope loss by evaporation in terrestrial magmas.
Article
Environmental Sciences
Feihong Liang, Lang Xu, Long Ji, Qingyao He, Lanlan Wu, Shuiping Yan
Summary: A new method of converting biogas slurry into organic flower fertilizer was proposed in this study, showing promising results in cultivating Spathiphyllum with improved agronomic traits and ornamental values.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Agronomy
Jingjie Zhou, Yan Sun, Han Xiao, Qingxu Ma, Linlin Si, Liang Ni, Lianghuan Wu
Summary: This study investigated the uptake and translocation of silicon in rice, finding that the transporters Lsi1 and Lsi2 play key roles in silicon absorption, with other silicon transport pathways likely belonging to ion channels and electrogenic pumps. The fractionation of silicon isotopes proved to be a useful tool in studying plant silicon uptake and translocation.
Article
Geochemistry & Geophysics
Wenhong Johnson Qiu, Mei-Fu Zhou, Xiaochun Li, Fang Huang, John Malpas
Summary: The study investigates the formation of sediment-hosted stratiform sulfide (SHSS) deposits using Fe, S, and C isotopes. It found that pyrite grains in laminated ores and black shales from the Devonian Dajiangping SHSS-type pyrite deposit in South China exhibit different isotopic compositions, with positive Fe isotopic values in black shales indicating gradual crystallization from sediment-derived iron and negative Fe isotopic values in laminated ores due to kinetic fractionation in hydrothermal plumes.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2021)
Article
Chemistry, Applied
Hongxia Li, Meijia Wu, Seng She, Guanghui Lin, Jinhui Zhou, Lanzhen Chen
Summary: A new idea and strategy for honey traceability and identification was provided by studying the carbon isotope fractionation of rape honey and its components. The moisture content of rape honey continued to decrease, and the glucose and fructose content continued to increase during the ripening process. The fractionation of carbon isotope from rape flowers to honey was significant, and the delta C-13 of rape honey and its components were mainly related to rape flowers and its stamens.
Article
Engineering, Environmental
Yaqing Liu, Juan Fu, Langping Wu, Steffen Kuemmel, Ivonne Nijenhuis, Hans H. Richnow
Summary: In this study, multi-element compound-specific stable isotope analysis was used to evaluate the α-HCH and γ-HCH transformations catalyzed by LinA1 and LinA2 enzymes. The results showed slight differences in the isotopic fractionation patterns of different enantiomers, but both enzymes exhibited similar reaction mechanisms during γ-HCH transformation.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Environmental
Clara Torrento, Violaine Ponsin, Christina Lihl, Thomas B. Hofstetter, Nicole Baran, Martin Elsner, Daniel Hunkeler
Summary: Although multielement isotope fractionation studies have been well-established for point-source pollution, they are only emerging for diffuse pollution by micropollutants like pesticides. This study found that chlorine isotope fractionation can be a robust indicator of chloroacetanilide degradation, with distinct patterns observed for different degradation pathways. The 3D isotope approach allows for differentiation of transformations that may not be distinguishable based on C and N isotope data alone.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Environmental Sciences
Yingmei Huang, Jicai Yi, Yao Huang, Songxiong Zhong, Bin Zhao, Jing Zhou, Yuxuan Wang, Yiwen Zhu, Yanhong Du, Fangbai Li
Summary: This study investigates the impact of biochar on methylmercury (MeHg) accumulation in rice. The results show that biochar reduces MeHg levels in paddy soils by decreasing bioavailable Hg and microbial Hg methylation. Additionally, biochar decreases the uptake and translocation of MeHg in rice plants, resulting in a reduction of MeHg accumulation in rice grains.
ENVIRONMENTAL POLLUTION
(2024)
Article
Plant Sciences
Feihong Liang, Shihui Wei, Lanlan Wu, Shuiping Yan
Summary: To mitigate global warming caused by increased CO2 concentration, it is suggested to supply CO2 to plants through other forms to enhance their CO2 uptake. This study investigated the potential of using CO2-stored biogas slurry as a carrier for plant growth by converting CO2 into HCO3-. Results showed that the physiological toxicity of CO2-rich biogas slurry to rice diminished, as indicated by decreased pH and increased EC values. Rice cultivated with CO2-rich biogas slurry exhibited higher root activities and reduced toxicity from HCO3-. Furthermore, adopting this method promoted rice tillering and nutrient accumulation compared to traditional biogas slurry irrigation.
ENVIRONMENTAL AND EXPERIMENTAL BOTANY
(2023)
Article
Environmental Sciences
Yuxiao Gou, Tomihiko Higuchi, Yuki Iino, Tsuyoshi Nagasaka, Yuichi Shimizu, Kotaro Shirai, Takashi Kitagawa
Summary: This study determined the oxygen isotope fractionation equation for chum salmon and found that both oxygen and carbon isotopes deplete simultaneously in lower temperature settings.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Neurosciences
Liwei Sun, Chunlin Li, Songjian Wang, Qian Si, Meng Lin, Ningyu Wang, Jun Sun, Hongjun Li, Ying Liang, Jing Wei, Xu Zhang, Juan Zhang
Summary: This study investigated the neural representation of sound locations in high-level regions using various analysis methods. The results showed that besides the auditory cortices, regions such as the intraparietal sulcus, superior parietal lobule, and frontal eye field were also activated to different extents by sound locations. Additionally, both hemispheres of the auditory cortices and the left frontal eye field exhibited a multivariate pattern representation of sound locations.
Article
Computer Science, Information Systems
Menghui Wu, Jingjing Guo, Chunlin Li, Youlong Luo
Summary: The paper focuses on cache optimization and service selection algorithms in the cloud-edge environment. A cache optimization model based on popularity is proposed to solve the problem of cached content in edge servers considering factors such as energy consumption and cost. For service selection, a Q-learning-based algorithm is proposed to address the dynamic task allocation and Qos optimization in the edge computing environment. Experimental results show that the proposed algorithms can significantly improve cache hit ratio, minimize transmission overhead, and ensure server load balancing in the cloud-edge environment.
Article
Computer Science, Information Systems
Qingzhe Zhang, Chunlin Li, Yong Huang, Youlong Luo
Summary: This paper proposes a framework for multi-access edge computing systems based on software-defined networking and a reliable placement method. It also introduces a mobile-aware service adaptive deployment method. Experimental results show that the proposed algorithm can optimize the quality of user experience.
Article
Geochemistry & Geophysics
A. P. Martin, C. Lim, M. Kah, M. S. Rattenbury, K. M. Rogers, E. L. Sharp, R. E. Turnbull
Summary: Soil chemistry is influenced by environmental conditions, parent material and human activities. Cities built on volcanic rock, like Auckland, have unique and important soil characteristics. This study analyzed the geochemical properties of urban soils in Auckland and found that volcanic parent material and C4 grasses significantly influenced the soil composition. Metal contamination in urban soils was associated with anthropogenic sources, such as leaded paint, industrialization, and pesticide residues. Comparison with other urban areas built on volcanic rock or non-volcanic substrates showed that the duration of urbanization and the age and quality of housing are important factors in soil pollution. Cities like Auckland and Naples have elevated levels of certain elements in their soils compared to cities with non-volcanic substrates, such as Arica.
APPLIED GEOCHEMISTRY
(2023)
Article
Computer Science, Artificial Intelligence
Chunlin Li, Yong Zhang, Youlong Luo
Summary: Computation-intensive and time-delay-sensitive tasks are growing rapidly, leading to higher requirements for mobile user devices. To address this, a mobile edge computing system is needed. However, in this system, the lack of popular cached content in the edge server leads to delays and backhaul link load. To tackle this, this article proposes a content caching policy using DQN to optimize the caching scheme. Additionally, a quantum ant colony based computing offloading strategy is introduced to improve computing capacity and consider delay, energy consumption, and server cost.
APPLIED SOFT COMPUTING
(2023)
Article
Computer Science, Information Systems
Chunlin Li, Yong Zhang, Youlong Luo
Summary: This paper introduces the impact of controller deployment solutions on the service quality of SDN and proposes a multi-controller deployment algorithm based on network partition and a collaborative task scheduling algorithm based on dependency relationship. The experiments show that both algorithms can effectively reduce latency and improve efficiency.
CLUSTER COMPUTING-THE JOURNAL OF NETWORKS SOFTWARE TOOLS AND APPLICATIONS
(2023)
Review
Chemistry, Applied
Chunlin Li, Xuming Kang, Jing Nie, An Li, Mohamed A. Farag, Cuiling Liu, Karyne M. Rogers, Jianbo Xiao, Yuwei Yuan
Summary: Over the last decade, isotope ratio mass spectrometry (IRMS) using multiple light stable isotopes has been widely applied in China for food origin verification and authentication. It has successfully characterized and identified Chinese food products, reducing fraud, improving food safety, and enhancing consumer trust and government regulatory policies.
Article
Engineering, Civil
Karyne M. Rogers, Rob van der Raaij, Andy Phillips, Mike Stewart
Summary: A national survey in New Zealand uses nitrogen and oxygen isotopes to identify the extent and sources of nitrates in freshwater resources. The study investigates the impact of various factors on nitrate isotopes and finds that nitrate contamination is a significant threat to drinking water resources in New Zealand. Groundwater has higher nitrate concentrations compared to surface water, and the unique farming practices in New Zealand contribute to the nitrate pollution.
JOURNAL OF HYDROLOGY
(2023)
Article
Engineering, Civil
Hao Wu, Haiquan Chen, Bingqing Yi, Karyne M. Rogers, Xuehai Bian, Ni Lin, Xiuwen Zhou, Baohui Jin, Zhi Yan, Haichao Zhou
Summary: This study comprehensively analyzed 96 bottled mineral water samples from different origins including China, France, Italy, New Zealand, and Fiji. By investigating various factors such as dissolved inorganic carbon, water isotopes, mineral elements, and ions, the researchers were able to trace the origin of the mineral water. The results showed significant variations in the composition of mineral water from different regions, and statistical models were successful in accurately distinguishing the origins of the water samples.
JOURNAL OF HYDROLOGY
(2023)
Article
Engineering, Chemical
Xinrui Dai, Chunlin Li, Shibo Wang, Hua Wang, Jianxin Xu, Qingtai Xiao, Yuewei Fan
Summary: The rotation plus revolution (RPR) stirring method achieves chaotic mixing by inducing a specific chaotic state in the fluid, which disrupts isolated mixing regions. RPR significantly improves reaction rates by increasing effective collision probabilities. Compared to eccentric rotation (ER) and orbital rotation (OR), RPR achieved a purification rate of 96.9% in 60 minutes, which was 37.8% and 35.1% higher, respectively. RPR also had higher energy utilization and lower unit ion purification energy compared to ER and OR, resulting in improved purification efficiency with reduced energy consumption.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2023)
Article
Construction & Building Technology
Chuyi Zhang, Yuanman Hu, Matthew D. Adams, Rencang Bu, Zaiping Xiong, Miao Liu, Yan Du, Binglun Li, Chunlin Li
Summary: In this study, the spatial-temporal characteristics of PM exposure risk in Shenyang were analyzed using landscape patterns and data from land use, cell phone signaling, and PM mobile monitoring. The results showed different spatial distributions of PM on weekdays and weekends, with lower exposure risk on weekends. The study also identified the key factors influencing PM exposure risks.
SUSTAINABLE CITIES AND SOCIETY
(2023)
Article
Construction & Building Technology
Hongchao Xu, Chunlin Li, Yuanman Hu, Shuai Li, Ruixue Kong, Zhibin Zhang
Summary: With the continuous development of urbanization, the 2D landscape pattern is insufficient to explain complex urban thermal phenomenon. The relationship between 2D/3D urban patterns and land surface temperature (LST) in cities of different sizes has been analyzed. The study found that with the increase in city size, LST gradually increased in summer and decreased in winter. Factors such as tree volume, mean tree height, and impervious surface patch index significantly influenced LST.
BUILDING AND ENVIRONMENT
(2023)
Article
Computer Science, Hardware & Architecture
SenXing Lu, Mingming Zhao, Chunlin Li, Quanbing Du, Youlong Luo
Summary: This article proposes an efficient strategy to address the problems of data partitioning and job scheduling in the Spark framework. It introduces a balanced partitioning strategy for intermediate data and a task scheduling algorithm using a greedy strategy. Experimental results show that these strategies effectively improve system task processing efficiency and decrease overall task completion time.
Article
Chemistry, Analytical
Hanyi Mei, Jing Nie, Shu Wang, Yongzhi Zhang, Chunlin Li, Shengzhi Shao, Shanshan Shao, Karyne M. Rogers, Yuwei Yuan
Summary: This study successfully achieved the geographical identification of Hangbaiju by using stable isotopes and multivariate statistical analysis. The results showed significant differences in stable isotopic compositions among different producing regions of Hangbaiju, as well as significant isotopic variations at different growth stages.
Article
Computer Science, Information Systems
Shuai Chang, Chunlin Li, Chunping Deng, Youlong Luo
Summary: To address the issue of load balancing in multi-SDN controllers, a low-latency controller load balancing switch migration algorithm is proposed. It consists of a load monitoring module, a decision-making module, and a switch migration module. By migrating the switch with the highest load to a controller with better processing capacity and shorter distance, load balancing is achieved. Additionally, an offloading decision-generation algorithm based on Lyapunov optimization is proposed to consider the stability of the MEC system and maximize its profit while meeting stability and delay requirements.
CLUSTER COMPUTING-THE JOURNAL OF NETWORKS SOFTWARE TOOLS AND APPLICATIONS
(2023)
