Trace Metal Concentrations in the Liquid Phase of  Phosphate Rock-Treated Soils

Abstract

Concentrations of potentially toxic elements were determined in the soil solution of two soils (acidic sandy and slightly acidic clay loam) treated with phosphate rocks having high Cd content in a pot experiment. Relative concentrations characterizing the mobility of metals (expressed as soil solution concentrations in percentage of their “total” amounts in the phosphate rock-treated soil) decreased with increasing phosphate rock rates in the sandy soil. Mn@Sr>Cd@Co were the most, while Pb and Cr the least mobile elements. The relative concentrations in the clay loam soil were much lower than in the sandy soil and they practically remained constant with increasing phosphate rock rates. It was concluded that in the experimental time frame the environmental risk did not increase with the increase of phosphate rock rate.

Pursuing development on the Eastern Flank of Mt Cameroon: Implications on its heavy metal status, environmental quality and human security

“…The highest Cd concentration was obtained at Molyko. Cd is a common additive in phosphorus fertilizers (Csillag et al, 2006;Scaccabarozzi et al, 2020). Though higher concentrations were still below food safety considerations, Cd can easily enter the human body through the food materials, when accumulated in the soils.…”

The Response of Thiols to Cadmium Stress in Spinach (Spinacia Oleracea L.)

“…Cd occurs locally in high concentrations in the Northern Plains of the US [6] due to the background Cd soil concentrations, up to an average of 0.4 mg/kg [7] and a median of 0.3 mg/kg in the Canadian Great Plains [8]. Data showed higher concentrations of Cd in the agricultural soils of Western Europe compared with those in the new members of EU12 owing to phosphorus fertilizers [9]. Meanwhile, the agricultural areas in the EU are safe from Cd contamination; based on the analysis of the top soils from approximately 22,000 locations in EU; only 5.5% of the samples have concentrations above the threshold (0.3 mg/kg), and there was excess Cd in agricultural soils in isolated cases in France and Spain [10].…”

Nyersfoszfátok agronómiai hatékonyságának vizsgálata tenyészedény-kísérletben. IV. A nyersfoszfátok hatása a tavaszi árpa bokrosodáskori tömegére és P-felvételére

“…Ebben a második kísérletsorozatban is, hasonlóan az elsőhöz, mind az agronómiai értékelést, mind a környezetvédelmi kockázatbecslést is elvégeztük, ill. elvégezzük. Komplex megközelítéssel, a nyersfoszfátok laboratóriumi oldhatósági viszonyait (OSZTOICS et al, 2005c), a vörös here potenciálisan toxikus elemtartalmát (OSZTOICS et al, 2006c), a talajoldat potenciálisan toxikus elemtartalmát (CSILLAG et al, 2005(CSILLAG et al, , 2006a, a gyökérkörnyezet (VÉGH et al, 2006), valamint a növény-mikorhiza szimbiózis (TAKÁCS et al, 2006) szerepét is értékeltük, ill. értékeljük.…”