Heavy metals in soils of Hechuan County in the upper Yangtze (SW China): Comparative pollution assessment using multiple indices with high-spatial-resolution sampling

Evaluation of ecological risk, source, and spatial distribution of some heavy metals in marine sediments in the Middle and Eastern Black Sea region, Turkey

“…After the sediment samples were weighed on a precision scale to be about 100 g, they were left to dry at 105 o C for 48 hours until they reached a constant mass (Karbasdehi et al 2016;Tholkappian et al 2018) and the samples were ground to a fine powder in a mortar for 15-20 minutes. The samples were sieved with a 63 µm sieve, as metals accumulated more as a result of the increase in surface area as the particles became smaller in size (Ravisankar et al 2014;Kumar et al 2017;Gholizadeh and Patimar 2018;Ni et al 2018;Ustaoğlu and Islam 2020). Prior to metal analysis, the dried samples were placed in a vacuum evacuated desiccator.…”

Trace elements in Gobi soils of the northeastern Qinghai-Tibet Plateau

“…Trace elements in soils show persistence, toxicity, and bioaccumulation [6][7][8][9]. Therefore, the excessive trace elements in soils possibly change soil compositions and inhibit soil functions [10][11][12][13][14]. Anthropogenic activities will significantly increase the contents of trace elements in soil [15].…”

Trace metals’ contamination in water and soils in the vicinity of a small–medium waste electrical and electronic equipment recycling plant

“…This index takes into account the preindustrial reference level of metals of concern. Worldwide this ecological RI was found to be useful in assessing the pollution risk of soils and sediments in both the terrestrial and the marine environments . One of the weaknesses of the Hakanson index is that it does not take into account the lithogenic and sedimentary inputs.…”