Comparative analysis with the similar data obtained from leaves ash of Populus nigra L. It is the major industrial center of Kazakhstan Republic on the territory where the industrial giants of non-ferrous metallurgy and nuclear energy are situated. The article deals with the content of 28 chemical elements in the leaves ash of black poplar (Populus nigra L.) growing in Ust-Kamenogorsk city area. Yalaltdinova, Albina Baranovskaya, Natalya Rikhvanov, Leonid Matveenko, Irina Geochemical peculiarities of black poplar leaves (Populus nigra L.) in the sites with heavy metals intensive fallouts These results are helpful for understanding the exposure risk to PCDD/Fs, PCBs and PCNs in numerous metallurgical plants being operation in China. The comparison of PCDD/F, PCB and PCN profiles between air samples and stack gas samples by similarity calculation and principal component analysis suggested the influence of stack gas emissions from metallurgical plants on surrounding air. Stack gas samples from metallurgical plants were also collected and analyzed for comparing their emission profiles with that of air samples. The estimated cancer risk were higher than 100 per million people for three secondary aluminum and copper smelters among the sixteen metallurgical plants, indicating high cancer risks. The estimated inhalation intakes of PCDD/Fs, PCBs, and PCNs together in eight iron ore sintering plants, three secondary copper plants, four secondary aluminum plants, and one secondary lead plant were 4.9-213.4, 21.4-4026.4, 28.7-630, and 11.7fgTEQkg -1 day -1, respectively, and the corresponding cancer risks were estimated to be 8.7Ã-10 -7 to 3.8Ã-10 -5, 5.1Ã-10 -6 to 1.1Ã-10 -4, 3.8Ã-10 -6 to 7.1Ã-10 -4, and 2.1Ã-10 -6, respectively. It is significant to evaluate the air levels and human risks of PCDD/Fs, PCBs and PCNs in metallurgical plants considering their adverse effects on human health and thousands of metallurgical plants being in operation in China. Metallurgical plants are important sources of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs), polychlorinated biphenyls (PCBs) and polychlorinated naphthalenes (PCNs). Yang, Lili Liu, Guorui Zheng, Minghui Jin, Rong Zhu, Qingqing Zhao, Yuyang Zhang, Xian Xu, Yang The provisions of this subpart apply to process wastewater discharges.Ītmospheric occurrence and health risks of PCDD/Fs, polychlorinated biphenyls, and polychlorinated naphthalenes by air inhalation in metallurgical plants. CATEGORY Metallurgical Acid Plants Subcategory Â§ 421.90 Applicability: Description of the metallurgical acid plants subcategory. 421.90 Section 421.90 Protection of Environment ENVIRONMENTAL PROTECTION. 40 CFR 421.90 - Applicability: Description of the metallurgical acid plants subcategory.

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