Environmentally geochemical characteristics of vanadium in the topsoil in the Panzhihua mining area, Sichuan Province, China

Abstract

Vanadium is a trace element, which may be biologically beneficial and possibly essential but certainly harmful to human beings and some living organisms if excessive. After over 40 years of development, the mining industry has caused serious environmental problems in the Panzhihua mining area. Vanadium is significantly accumulated in the soil of the Panzhihua area. Human activities have intensified the pollution and release of vanadium and caused serious damages to the ecological system there. In the past few years, the authors have made investigations into and assessments on the geochemical distribution, chemical speciation, adsorption characteristics and transfer behavior of vanadium in the topsoil in the Panzhihua mining area. The results showed that: (1) the difference in the contents of vanadium in soil between premonsoon and monsoon is insignificant; (2) the adsorption isotherms of vanadium on soil in the Panzhihua mining area are well described by the Langmuir type; (3) the transfer ability of vanadium in soil is interrelated to soil properties; and (4) the chemical speciation of vanadium shows an order of insoluble residue > oxidizable=reducible > soluble component. According to the above results, some countermeasures to control pollution of vanadium in soil should be put forward.

Occurrence of Vanadium in Belgian and European Alluvial Soils

“…Stepwise multiple linear regressions was performed with pH(CaCl 2 ), organic carbon content, clay content, CaCl 2 -extractable V in P concentrations, dissolved organic carbon (DOC) content in the CaCl 2 -extracts, and ammonium-EDTA-extractable V in P concentrations. Phosphorus was included because phosphate can influence the release of V from soils [7,13,57].…”

“…Beside its natural occurrence in soils and sediments, several anthropogenic sources can cause an enrichment or even pollution of soils and sediments with V. The main anthropogenic sources of V are (1) the use of V as a catalyst in the metal-, cement-, electronics, and textile industry; (2) the production of certain metals such as iron and uranium, with V as a secondary product [2], vanadium concentrations up to 738 mg/kg [7] and 3505 mg/kg [1] have been reported in mining areas; (3) air emission of V from the combustion of fossil fuels [8]. The majority of the emissions of V into the air are taken up by the soil surface, especially when soils are rich in organic matter [9].…”

Bioavailability of Vanadium Extracted by EDTA, HCl, HOAC, and NaNO3 in Topsoil in the Panzhihua Urban Park, Located in Southwest China

“…The average amount of tourists is about a hundred people every day, and the maximum amount is about 20,000 people, mainly children. Furthermore, the children may touch the topsoil directly, so there was a potential health risk to these children [20].…”

Variabilidade espaçotemporal das águas subterrâneas do aquífero Bauru impróprias para o consumo humano: concentrações de Bário, Crômio Total e Vanádio

“…Este elemento pode ser benéfico e possivelmente essencial para os seres humanos (CETESB, 2019). Por outro lado, o interesse no Vanádio também tem crescido nas últimas décadas devido ao seu potencial efeito toxicológico em seres humanos e animais (Teng et al, 2006). A distribuição e concentração do Vanádio nas águas são dependentes da geografia do ambiente e da característica da fonte hídrica.…”