98%
921
2 minutes
20
In order to understand the characteristics of atmospheric heavy metal deposition in Harbin City, 46 deposition samples were collected which were taken using bulk deposition samplers during the period of 2008-2009 (about 365 days). The samples were analyzed for heavy metal concentration by atomic fluorescence spectrometry (AFS) and inductively coupled plasma-atomic spectrometry (ICP-AES). The deposition flux was calculated. Sources analysis was made by the method of principal component analysis (PCA), Pearsons and enrichment factor (EF). The following points can be gained through multivariate analysis. Mn and Co are mostly from natural sources while the others may be brought by coal dust, vehicle emissions and metal smelting.
Download full-text PDF |
Source |
---|
Braz J Biol
September 2025
Universidade Estadual Paulista (Unesp), Instituto de Ciência e Tecnologia, Departamento de Engenharia Ambiental, São José dos Campos, SP, Brasil.
The present study carried out the first systematic review with meta-analysis on the effects of metals and temperature rise individually and their associations with terrestrial invertebrates. Initially, a systematic review of peer-reviewed articles was performed. Meta-analysis demonstrated that metals negatively affected the fitness of annelids, arthropods, and nematodes and positively affected physiological regulation in annelids.
View Article and Find Full Text PDFPhys Rev Lett
August 2025
University of Delaware, Department of Physics and Astronomy, Newark, Delaware 19716, USA.
Ultrafast light-driven strongly correlated antiferromagnetic insulators, such as prototypical NiO with a large Mott energy gap ≃4 eV, have recently attracted experimental attention using photons of both subgap [H. Qiu et al., Nat.
View Article and Find Full Text PDFPhys Rev Lett
August 2025
Pohang University of Science and Technology, Department of Physics, Pohang 37673, Korea.
d-wave altermagnets have magnetic octupoles as their order parameters [S. Bhowal and N. A.
View Article and Find Full Text PDFPhys Rev Lett
August 2025
University of Konstanz, Department of Physics and Center for Applied Photonics, D-78457 Konstanz, Germany.
Femtosecond laser excitation of nanometer thin heterostructures comprising a heavy metal and a magnetically ordered material is known to result in the emission of terahertz radiation. However, the nature of the emitted radiation from heavy metal/antiferromagnet heterostructures has sparked debates and controversies in the literature. Here, we unambiguously separate spin and charge contributions from Pt/NiO heterostructures by introducing an unprecedented methodology combining high external magnetic fields with a symmetry analysis of the emitted terahertz polarization.
View Article and Find Full Text PDFPLoS One
September 2025
Bureau of Qinghai Environmental Geological Prospecting, Xi'ning, China.
This study focuses on mineral groundwater in alpine regions and its sustainable exploitation. The Tongde basin on Tibetan Plateau was investigated to reveal the hydrochemistry and formation of mineral groundwater in alpine basins and its sustainable development under anthropogenic disturbances. The results show that groundwater there is characterized by enriched strontium, with concentrations in the range of 0.
View Article and Find Full Text PDF