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Magnetic Particles Unintentionally Emitted from Anthropogenic Sources: Iron and Steel Plants
Environmental Science & Technology Letters ( IF 8.9 ) Pub Date : 2021-03-18 , DOI: 10.1021/acs.estlett.1c00164 Shuya Li 1 , Bo Zhang 2 , Di Wu 1 , Zhiwei Li 2 , Sheng-Qi Chu 3 , Xiang Ding 1 , Xingfu Tang 1 , Jianmin Chen 1 , Qing Li 1
Environmental Science & Technology Letters ( IF 8.9 ) Pub Date : 2021-03-18 , DOI: 10.1021/acs.estlett.1c00164 Shuya Li 1 , Bo Zhang 2 , Di Wu 1 , Zhiwei Li 2 , Sheng-Qi Chu 3 , Xiang Ding 1 , Xingfu Tang 1 , Jianmin Chen 1 , Qing Li 1
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Magnetic particles suspended in the atmosphere have attracted public attention due to their adverse health impacts. However, the origin of these magnetic particles has not been addressed. This study first reports the magnetic properties and chemical characteristics of emitted dusts from various anthropogenic sources. On the basis of the combination of magnetic parameter measurements and PM2.5 emission inventories, the iron and steel industry contributes >80% of the total magnetic particle emission among the studied emission source categories. In contrast, the magnetic particles emitted from other sectors make up a significantly smaller portion. Magnetite is the dominant magnetic contributor, as suggested by X-ray diffraction, Mössbauer spectra, and X-ray absorption studies. Morphological studies further indicate that nanoscale magnetite contained in steel plants derived particles is consistent with that found in human tissues. Our results suggest that applying a priority control strategy in the iron and steel industry can decrease the unintended emission of magnetic particles.
中文翻译：
人为来源无意中散发出的磁性粒子：钢铁厂
悬浮在大气中的磁性颗粒由于对健康的不利影响而引起了公众的关注。但是，这些磁性粒子的起源尚未得到解决。这项研究首先报告了各种人为来源排放的粉尘的磁性和化学特性。在磁参数测量和PM 2.5结合的基础上排放清单中，钢铁行业在所研究的排放源类别中贡献了总磁粉排放的80％以上。相反，从其他扇区发出的磁性颗粒则占很小的一部分。X射线衍射，穆斯堡尔谱和X射线吸收研究表明，磁铁矿是主要的磁性成分。形态学研究进一步表明，钢铁厂衍生颗粒中所含的纳米级磁铁矿与人体组织中的纳米级磁铁矿一致。我们的结果表明，在钢铁行业中应用优先控制策略可以减少意外的磁性粒子发射。
更新日期：2021-04-13
中文翻译：
人为来源无意中散发出的磁性粒子：钢铁厂
悬浮在大气中的磁性颗粒由于对健康的不利影响而引起了公众的关注。但是，这些磁性粒子的起源尚未得到解决。这项研究首先报告了各种人为来源排放的粉尘的磁性和化学特性。在磁参数测量和PM 2.5结合的基础上排放清单中，钢铁行业在所研究的排放源类别中贡献了总磁粉排放的80％以上。相反，从其他扇区发出的磁性颗粒则占很小的一部分。X射线衍射，穆斯堡尔谱和X射线吸收研究表明，磁铁矿是主要的磁性成分。形态学研究进一步表明，钢铁厂衍生颗粒中所含的纳米级磁铁矿与人体组织中的纳米级磁铁矿一致。我们的结果表明，在钢铁行业中应用优先控制策略可以减少意外的磁性粒子发射。
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