Heavy Metals in Waters and Suspended Sediments Affected by a Mine Tailing Spill in the Upper San Lorenzo River, Northwestern México

Abstract Heavy metal (HM) pollution has become a serious threat to coastal aquatic ecosystems. This study, therefore, aimed at assessing the spatial distribution of selected heavy metals/metalloids including Arsenic (As), Cadmium (Cd), Chromium (Cr), Lead (Pb), and Mercury (Hg) in surface sediment (0–15 cm) samples collected across Kalametiya Lagoon in southern Sri Lanka. Forty-one (41) grid points of the lagoon were sampled and the sediment samples were analyzed for HM content by using ICP-MS. A questionnaire survey was carried out to investigate the possible sources for HM pollution in Kalametiya Lagoon. Water pH and salinity showed significant variation across the lagoon. Overall mean value of pH and salinity were 6.68 ± 0.17 and 2.9 ± 2.2 PSU respectively. The spatial distribution of the heavy metals was not monotonic and showed a highly spatial variation. The kernel density maps of the measured heavy metals demarcated several different areas of the lagoon. The mean contents of As, Cd, Cr, Hg, and Pb were lower than that of threshold effect level (TEL) however, higher for Hg at the North Inlet. Nevertheless, it was still lower than potential effect level (PEL). Socio-economic interactions have dramatically reduced during the past two decades. Industrial sewage, river suspended sediments and agrochemicals such as fertilizers, pesticides were reportedly identified as the possible sources for heavy metal loads. Accumulation of toxic heavy metals can be minimized by detouring the water inflow to the lagoon.

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The effects of ectomycorrhizal fungi on heavy metals’ transport in Pinus massoniana and bacteria community in rhizosphere soil in mine tailing area

Journal of Hazardous Materials ◽

10.1016/j.jhazmat.2019.121203 ◽

2020 ◽

Vol 381 ◽

pp. 121203 ◽

Cited By ~ 11

Author(s):

Peiyi Yu ◽

Youping Sun ◽

Zhongliang Huang ◽

Fan Zhu ◽

Yujing Sun ◽

...

Keyword(s):

Heavy Metals ◽

Ectomycorrhizal Fungi ◽

Rhizosphere Soil ◽

Pinus Massoniana ◽

Mine Tailing

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Study on Procedure Toxicity and Harmless Disposal of Manganese Mine Tailing Slag

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.414.312 ◽

2011 ◽

Vol 414 ◽

pp. 312-316 ◽

Cited By ~ 2

Author(s):

Wen Zhang Huang ◽

Ning Lu

Keyword(s):

Heavy Metals ◽

Water Content ◽

Extraction Procedure ◽

Mine Tailing ◽

Hazardous Wastes ◽

Manganese Zinc ◽

Leaching Solution ◽

Cement Solidification ◽

Harmless Disposal

Manganese mine slag was the salvage in the course of manganese producing. Many matters shall be extracted by rain eluviation and then turn into the water and soil to pollute environment. The water content and extraction procedure toxicity of the manganese waste residue were studied. Combining solidification additive was used to process the manganese waste residue for the harmless disposal. The results showed that the contents of Manganese、Zinc、Chromium and Cadmium in the manganese waste slag exceeded the maximum of the Chinese Identification standard for hazardous wastes. The extraction procedure toxicity was effectively decreased by the harmless disposal when the proportion of cement and manganese in the whole mine slag was 60%, and the content of heavy metals in the leaching solution were under the standard. Hence, the method of cement solidification could control the pollution to the environment effectively.

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