Assessment of metal transfer factor under irrigation with treated municipal wastewater

作者：Kalavrouziotis Ioannis K^*; Koukoulakis Prodromos; Kostakioti Eirini

来源：Agricultural Water Management, 2012, 103: 114-119.

DOI：10.1016/j.agwat.2011.11.002

• Optimum transfer factor
• Municipal wastewater
• Heavy metals
• Cabbage

The knowledge of the optimum transfer factor (TF) of heavy metals from soil to plant is of vital importance, because IF is an indicator of heavy metal mobility in soils and a factor that quantifies the existing differences in the bioavailability of metals to plants. Optimum heavy metal transfer factors were found during multiple linear regression analysis (MLRA), under the effect of treated municipal wastewater (TMWW), in the context of a greenhouse randomized blocks experiment. The treatments used were: control (fresh well water), 25%, 50%, 75%, and 100% TMWW in four replications. Cabbage (Brassica oleracea var Capitata) was used as test plant. The optimum metal IF was expressed, as a function of: (i) dry matter (dm) yield of cabbage plant parts (roots, leaves, stems, head) and whole plant, (ii) dm metal content (DMMC), and (iii) pollution load index (PLI). Based on the parameters used in the multiple regression equation, the DMMC and the PLI were found to be statistically, significantly related to IF. Optimum metal transfer values were also calculated as the geometric mean of all metal TFs for each plant part (root, leaves, stems, heads). The geometric mean IF values found, reflecting the whole plant, were 3.44 for Zn, 0.93 for Cu, 4.32 for Cd, 116.67 for Cr, 2.86 for Ni, and 0.56 for Pb.

• 出版日期2012-1