Source identification, accumulation and dispersion of heavy metals pollution into the surface sediments of urban runoff (case study, channels of Tehran City)

IF 3 4区 环境科学与生态学 Q3 ENGINEERING, ENVIRONMENTAL
Amin Hasani Moghaddam, Seyed Hossein Hashemi, Mojtaba Bashtamian
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Abstract

Heavy metals (HMs) pollution presents a significant challenge for both human health and natural ecosystems on a global scale. This study investigates the pollution of surface sediments resulting from urban runoff, identifies potential pollution sources, and examines the correlation between HMs and two factors: total organic carbon (TOC%) and particle size distribution (PSD). A total of 30 surface sediment samples were collected from three urban channels in the Tehran megacity. The concentrations of key elements, including strontium (Sr), lead (Pb), cadmium (Cd), nickel (Ni), and copper (Cu), were determined using Inductively Coupled Plasma-Optical Emission Spectrometry (ICP-OES). The mean concentrations of Cd, Ni, Cu, Pb, Sr, were 0.46, 39.80, 161.25, 261.75, 388.50 mg/litter, respectively, following the sequence Sr > Pb > Cu > Ni > Cd. To identify the HMs accumulation, factor analysis(FA) was employed. The HMs rank order based on FA was as follows: 37.7% > 24.4% > 24.1%. According to (FA), the possible accumulation source of Pb and Sr is as different as Cu, Ni, and Cd elements. A significant correlation between Sr with TOC% (r = 0.901, sig = 0.000), Pb with both TOC% and particles < 75µm (r = 0.77, r = 0.63, Sig = 0.000 respectively), while Cu, Ni and Cd with particles < 150µm (r = 0.68, r = 0.81, r = 0.87, Sig = 0.000 respectively) were observed). Overall, the concentration of heavy metals (HMs) demonstrated a significant negative correlation with the particle size of surface sediments.

重金属(HMs)污染在全球范围内对人类健康和自然生态系统都构成了重大挑战。本研究调查了城市径流对表层沉积物造成的污染,确定了潜在的污染源,并研究了 HMs 与两个因素(总有机碳 (TOC%) 和粒度分布 (PSD))之间的相关性。从德黑兰特大城市的三条城市河道中共采集了 30 个表层沉积物样本。采用电感耦合等离子体-光学发射光谱分析法(ICP-OES)测定了主要元素的浓度,包括锶(Sr)、铅(Pb)、镉(Cd)、镍(Ni)和铜(Cu)。按照 Sr > Pb > Cu > Ni > Cd 的顺序,镉、镍、铜、铅、锶的平均浓度分别为 0.46、39.80、161.25、261.75 和 388.50 毫克/升。为了确定 HMs 的累积量,采用了因子分析(FA)。根据因子分析,有害物质的排序如下37.7% > 24.4% > 24.1%。根据(FA),铅和锶的可能累积源与铜、镍和镉元素一样不同。锶与总有机碳含量(r = 0.901,sig = 0.000)、铅与总有机碳含量和颗粒< 75微米(r = 0.77,r = 0.63,sig = 0.000)之间存在明显的相关性,而铜、镍和镉与颗粒< 150微米(r = 0.68,r = 0.81,r = 0.87,sig = 0.000)之间存在明显的相关性。)总体而言,重金属(HMs)浓度与表层沉积物的颗粒大小呈显著负相关。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Journal of Environmental Health Science and Engineering
Journal of Environmental Health Science and Engineering ENGINEERING, ENVIRONMENTAL-ENVIRONMENTAL SCIENCES
CiteScore
7.50
自引率
2.90%
发文量
81
期刊介绍: Journal of Environmental Health Science & Engineering is a peer-reviewed journal presenting timely research on all aspects of environmental health science, engineering and management. A broad outline of the journal''s scope includes: -Water pollution and treatment -Wastewater treatment and reuse -Air control -Soil remediation -Noise and radiation control -Environmental biotechnology and nanotechnology -Food safety and hygiene
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