Akademik Veri Yönetim Sistemi
LISTY CUKROVARNICKE A REPARSKE, cilt.133, sa.1, ss.25-30, 2017 (SCI-Expanded)
An experiment was carried out to determine heavy metal loading capacity, metal mobility and pollution risks in soil and to determine growth, heavy metal accumulation and health risks in sugar beet plants following sewage sludge application. Application of sewage sludge led to a far greater introduction of heavy metals and brought about a significant increase in their concentrations in soil. Metal speciation studies showed that soluble, exchangeable and Fe-Mn bound fractions of metals increased considerably by sewage sludge application. Sewage sludge application in soil caused higher mobility factor values for all metals with the exception of Ni. Sewage sludge treatment increased both leaf and root dry matter yields and heavy metal concentrations in sugar beet plants. Total sugar content in roots did not show any statistically significant change. Sewage sludge application led to greater transfers of Zn, Cd and As metals both into leaf and root tissue of plants. Contamination evaluation studies showed that single and composite pollution coefficient of heavy metals in soil did not exceed its critical value. However, target hazard quotient of Zn and Pb exceeded its critical value after sewage sludge treatment. Food hazard index was also above its critical value after sewage sludge treatments.