Research article

ROLE OF MINERAL COMPONENT IN CONTAMINATION OF SOIL AND PLANT BY SOME HEAVY METALS FOR AL-MUSAYYIB ELECTRICITY THERMAL POWER STATION RESIDUES

Abbas S.S. AL-Wotaify, Rand L. Al-Jaryan and Israa L. Al-jeryan

Online First: November 30, 2022


This research included study of Barium, Copper, Rubidium, Bromine, Lanthanum and Thorium by XRF in soils and plant of Musayyib and Alexandria-Babylon Governorate between Longitude °32 99ˊ 861ˊˊN and Latitude °44 29ˊ 00ˊˊE. As well as estimation them in plant. They were (228.10-241.01, 54.40-56.20, 51.10-54.30, 23.90-32.40, 13.30-14.10 and 4.40-4.50mg kg-1) respectively in impacted soil (Ss1, Ss2) by Al-Musayyib electricity thermal power station residues. Also, they ranged in sand Ss11 and Ss21 of mentioned soil samples (18.20-20.18,11.04-12.30, 10.45-10.76, 2.66-3.80,1.21-2.10 and 0.85-1.01mgkg-1), while they were (138.16-109.80, 25.80-27.10, 25.20-28.50,16.80-21.90, 6.70-10.79 and 2.20-2.50mgkg-1) in clay fraction (Ss12, Ss22). Consequently, in dry matter of Vicia faba L. plant leaves were (38.90-65.10, 25.80-45.90, 30.30-30.80, 4.90-6.03, 2.01-3.10 and 2.01mg kg-1), and they were (35.40-55.30, 27.10-39.90, 23.70-28.80, 4.80-5.20, 2.01-5.20 and 1.50-1.80mg kg-1) respectively in dry matter of roots growing at polluted soil samples (Ss1,Ss2). Pollution load index(PLI) for heavy metals group in each of contaminated Musayyib soil samples(Ss1,Ss2) compared with soil Alexandria samples (S01,S02)was (1.21-1.47). It was (1.12-1.45) in sand samples, while in clay samples was (1.29-1.70). Geo-accumulation index(Igeo) recorded the highest values for Br and La compared to other heavy metals in the study samples affected by the power station residues, and La was higher than Br in contaminated soil sample Ss1 comparison with S02 was (0.63), and contaminated sand sample Ss11 with comparison S021(Ss11-Ss021) was (0.43). While Igeo for Br was the highest (0.75) in clay sample Ss12-Ss22. For Th and Ba, Igeo was the highest in the sand sample Ss11- S011: 0.37 and 0.23 respectively. Igeo for La was the highest: 1.03 followed Br: 0.57 in clay sample Ss22-S022. Ba and Th maintained the increase in the sand sample Ss21-S011: 0.73, 0.44 consecutively. Mineral concentration factor (MCF) of clay fraction contributed to soil pollution more than MCF for sand which was (0.08-0.23, 0.46-0.68) respectively. While bioaccumulation factor(BCF) of sand fraction contributed to plant pollution more than BCF of clay (0.45-14.55 and 0.18-2.53) consecutively with regard to heavy metals in the study soils. X-ray diffraction results showed present of montmorillonite, true chlorite, kaolinite and mica minerals for impacted clay sample in electricity Al-Musayyib thermal power station residues (Ss21). Also, the intensity of peaks appeared percentages of these minerals 23.29, 24.90, 12.85, 18.87 and 20.09% respectively.

Keywords

Clay and Sand, Soil and plant pollution, Rubidium, Barium, XRF and XRD