TY - CONF A1 - Krüger, Oliver A1 - Adam, Christian T1 - Use of secondary phosphates to reduce soil pollution T2 - 4th International conference on environmental pollution and remediation (Proceedings) N2 - Phosphorous is essential for all living creatures and indispensable in its functions regarding bone structure, energy metabolism, and storage and expression of genetic information. It is removed from the soils through farming and husbandry and has to be replaced. Annually, more than 17 million tons of phosphorous are applied to soils in the form of mineral fertilizer worldwide (Killiches, 2013). In Germany, this accounts for 150,000 t/a. This fertilizer is produced from rock phosphate, which is often contaminated with heavy metals (Dissanayake et al., 2009), especially cadmium and uranium. Cd concentrations are around 30 mg/kg, U around 100 mg/kg, with even higher peak values. Since rock phosphate is treated with acids to make the phosphorous bioavailable, those heavy metals were also mobilized. When the fertilizer is applied to the farmland, the contaminants can pollute the soil and pose an environmental risk. Sewage sludge is another phosphorous source for farming. In Germany, 15,000 t/a phosphorous are applied to farmlands this way. However, there is a growing concern of possible environmental hazards since sewage sludge contains not only inorganic contaminants but also organic pollutants, especially pharmaceuticals and personal care products (Guardia et al., 2004). T2 - 4th International conference on environmental pollution and remediation CY - Prague, Czech Republic DA - 11.08.2014 PY - 2014 UR - https://opus4.kobv.de/opus4-bam/frontdoor/index/index/docId/33432 AN - OPUS4-33432 SP - Paper 136-1 EP - 136-2 AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany