ROLE OF Moringa oleifera SEEDS EXTRACT IN ELIMINATING SOIL AND WATER CONTAMINATION USING LETTUCE PLANTS AS INDICATOR.

A pot experiment was carried out on lettuce (Lactuca sativa L.) for growing 2021 season to study the effect of various water sources i.e., fresh water (FW), agricultural drainage (ADW), sewage (SW) and industrial drainage (IDW) after treated with moringa seed extract (MSE) on remove water and soils contamination and its effect on yield and heavy metals content of lettuce plants. The lowest values of SSP, SAR, SCAR, RSC, RSBC, PI, PS, KR and MAR were obtaind in fresh water followed by industrial drainage water, sewage water and agricultural drainage water when treated with MSE. The classification of all water sources indicates before treated with MSE of high salinity-low sodicity (C4S1) and moderate low sodicity (C2S1) after treated with MSE. Addition of MSE to water soureces reduced water turbidity, NO3-N, BOD, COD, DO and heavy metals compared with untreated water. The highest values of fresh and dry weight, N, P and K- uptake of lettuce plants obtainted in different water sources treated with MSE. Addition of MSE to different water sources gave the lowest accumulation of Pb, Cd, Ni, Fe, Cu, Zn and Mn in soil and lettuce plants compared to untreated water. [ABSTRACT FROM AUTHOR]