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331.
Zhiguo Cao Qiaoying Chen Xiaoying Wang Yajie Zhang Shihua Wang Mengmeng Wang Leicheng Zhao Guangxuan Yan Xin Zhang Ziyang Zhang Tianfang Yang Mohai Shen Jianhui Sun 《Environmental geochemistry and health》2018,40(6):2441-2452
Concentrations of eight trace metals (TMs) in road dust (RD) (particles?<?25 μm) from urban areas of Xinxiang, China, were determined by inductively coupled plasma mass spectrometry. The geometric mean concentrations of Zn, Mn, Pb, As, Cu, Cr, Ni and Cd were 489, 350, 114, 101, 60.0, 39.7, 31.6, and 5.1 mg kg?1, respectively. When compared with TM levels in background soil, the samples generally display elevated TM concentrations, except for Cr and Mn, and for Cd the enrichment value was 69.6. Spatial variations indicated TMs in RD from park path would have similar sources with main roads, collector streets and bypasses. Average daily exposure doses of the studied TMs were about three orders of magnitude higher for hand-to-mouth ingestion than dermal contact, and the exposure doses for children were 9.33 times higher than that for adults. The decreasing trend of calculated hazard indexes (HI) for the eight elements was As?>?Pb?>?Cr?>?Mn?>?Cd?>?Zn?>?Ni?>?Cu for both children and adults. 相似文献
332.
Cao Yanmei Li Zhe Ji Wei Ma Meng 《Environmental science and pollution research international》2021,28(23):29467-29483
Environmental Science and Pollution Research - The aerodynamic noise around the high-speed railway bridge is studied by the train-bridge-flow field numerical model and theory analysis. With the... 相似文献
333.
Zhao Yuhuan Cao Ye Shi Xunpeng Zhang Zhonghua Zhang Wenjie 《Environmental science and pollution research international》2021,28(11):13469-13486
Environmental Science and Pollution Research - Electricity generation is the largest sector with decarbonization potential for China and the world. Based on the new emission factors, this paper... 相似文献
334.
Li Guiju Cao Yaning Zhang Zhen Hao Linlin 《Environmental science and pollution research international》2021,28(7):7945-7954
Environmental Science and Pollution Research - The removal of ammonia nitrogen from wastewater is always a focus in current water treatment. In this study, a combination of mesoporous carbon... 相似文献
335.
Feng Shi-Jin Li An-Zheng Zheng Qi-Teng Cao Ben-Yi Chen Hong-Xin 《Environmental science and pollution research international》2019,26(15):15229-15247
Environmental Science and Pollution Research - Aeration by airflow technology is a reliable method to accelerate waste biodegradation and stabilization and hence shorten the aftercare period of a... 相似文献
336.
Huy Tran Hong Phat Bui Dai Thi Cao Minh Van Viet Pham 《Environmental Chemistry Letters》2019,17(1):527-531
Environmental Chemistry Letters - Tin oxide nanoparticles (SnO2 NPs) with a diameter less than 10 nm are usually used in waste water treatment via the photocatalytic reaction. However,... 相似文献
337.
338.
H. Resit Akçakaya Ana S. L. Rodrigues David A. Keith E. J. Milner-Gulland Eric W. Sanderson Simon Hedges David P. Mallon Molly K. Grace Barney Long Erik Meijaard P. J. Stephenson 《Conservation biology》2020,34(3):561-571
Species interactions matter to conservation. Setting an ambitious recovery target for a species requires considering the size, density, and demographic structure of its populations such that they fulfill the interactions, roles, and functions of the species in the ecosystems in which they are embedded. A recently proposed framework for an International Union for Conservation of Nature Green List of Species formalizes this requirement by defining a fully recovered species in terms of representation, viability, and functionality. Defining and quantifying ecological function from the viewpoint of species recovery is challenging in concept and application, but also an opportunity to insert ecological theory into conservation practice. We propose 2 complementary approaches to assessing a species’ ecological functions: confirmation (listing interactions of the species, identifying ecological processes and other species involved in these interactions, and quantifying the extent to which the species contributes to the identified ecological process) and elimination (inferring functionality by ruling out symptoms of reduced functionality, analogous to the red-list approach that focuses on symptoms of reduced viability). Despite the challenges, incorporation of functionality into species recovery planning is possible in most cases and it is essential to a conservation vision that goes beyond preventing extinctions and aims to restore a species to levels beyond what is required for its viability. This vision focuses on conservation and recovery at the species level and sees species as embedded in ecosystems, influencing and being influenced by the processes in those ecosystems. Thus, it connects and integrates conservation at the species and ecosystem levels. 相似文献
339.
340.
红壤丘陵脆弱生态环境的形成与整治对策 总被引:2,自引:0,他引:2
通过对我国东南部红壤丘陵区生态状况的历史回顾,分析了该区脆弱生态环境形成的主要原因,提出其整治应采取的生态、经济、社会诸方面的综合措施。 相似文献