Magnetic Response of Heavy Metal Pollution in Soil of Urban Street Greenbelts

Abstract

The magnetic characteristics and heavy metal elements of surface soil samples in Baoji urban street greenbelts were systematically analyzed in order to explore the feasibility of using magnetic parameters to indicate heavy metal pollution in urban street greenbelts soil. The results of the study showed that ferromagnetic minerals with low-coercivity and coarse magnetic grains dominated magnetic properties of the samples. The average values of low-frequency magnetic susceptibility (χ lf ) was 200.65×10 -8 m 3 /kg, which was much higher than the background value. The spatial variation of magnetic mineral content was remarkable, with high levels observed in heavy traffic areas and industrial gathering areas, and low content in areas heavily covered by short vegetation, which was basically consistent delineated by pollution load index (PLI). Magnetic parameters χ lf , saturated isothermal remanent magnetization (SIRM) and soft remanent magnetization (SOFT) can be used as the effective indicators for monitoring heavy metals pollution in soil of urban street greenbelts.

Advances in Studies on Heavy Metals in Urban Soil: A Bibliometric Analysis

“…The spatial distribution of magnetic concentration and heavy metal content in agricultural soils matches the spatial pattern of parameters in river sediments [111]. In recent years, environmental magnetic methods based on magnetization rates and rock magnetic parameters have been developed as suitable alternative techniques for characterizing and quantifying the extent of soil heavy metal pollution, for identifying the types of various industrial pollution sources [112][113][114][115], and as alternative indicators for determining the spatial distribution of soil heavy metal pollution and anthropogenic emission sources [100,101,106,109,110,116], with an increasing number of applications in various study areas [101,102,107,110,111,117].…”

“…This correlation can serve as an effective indicator for monitoring soil heavy metal pollution. The magnetic susceptibility of soils around industrial centers and areas with heavy traffic is higher than that of natural soils in non-urban areas [109]. Soil metal content is often used to evaluate the degree of anthropogenic influence in urban environments [37,38].…”

Magnetic Particles In Soils And Epiphytes In The Zone Of Influence Of A Ferrous Metallurgy Factory In The City Of Perm

“…The concentrations of metals in moss pseudotissues are not so affected by local fluctuations in the level of metals in the soil (Jiang et al 2018). Mosses have been widely used in several countries in Europe and China as biological monitors of metal pollution for decades because they easily accumulate pollutants over time, reflecting their long-term levels (Fernández et al 2015;Zhang et al 2022). As a result, numerous studies have successfully used elemental analysis of mosses to estimate the spatial distribution and sources of metals associated with urban and vehicular traffic.…”

“…The value of MS in urban soils polluted with TMP increases significantly. During hightemperature technogenic processes, some of the Fe ions in the lattice of technogenic magnetite are replaced by other cations, which makes it possible to identify the increase in the magnetic susceptibility of soils with an increase in the degree of their contamination with heavy metals (Vasiliev, Lobanova 2015;Bobrova 2021;Narayana 2021;Zhang et al 2022).…”

“…Biomonitoring methods are widely introduced into the practice of ecological and geochemical research in urban areas (Varduni 2015;Gatziolis et al 2016;Jiang et al 2018;Koroleva 2020;Messager et al 2021;Kropova et al 2022;Zhang et al 2022). The study of the elemental composition of epiphytes is often used to assess the degree of aerial pollution of ecosystems with heavy metals (Tarkhanov 2016;Ananyan 2020;Mostalygina 2020;Evseev et al 2021;Kataeva, Belyaeva 2021;Nuguyeva, Mammadov 2021).…”