Red mud with other waste materials as artificial soil substitute and its effect on Sinapis alba.

摘要: Abstract Despite efforts to utilise bauxite residue, the amount of red mud stored in reservoirs is increasing. This paper aims evaluate potential and other sludge waste types as a soil substitute by monitoring plant development. Pot experiments were carried out testing two mixtures: dredging from Lake Balaton mixed with garden sewage blend. These then treated (15 30% w/w). The plants under-, while roots more developed mix than blend control soil. In amendment, phosphorous content increased calcium was lower optimum. metals uptake factor quantity. Lead, nickel, titanium silicon had elevated concentrations parallel higher content, but only nickel exceeded threshold Hungarian legislation. Silicon beneficial for growth, compensating potentially toxic effects lead nickel. Results suggest that mixture either or can act catalysts growth rate test plants, allowing their utilisation secondary raw materials.