Evaluation of Heavy Metal Pollution in Rice (Oryza sativa L.) Fields of Bafra Plain

Authors : Betul BAYRAKLİ, Elif ÖZTÜRK

Pages : 208-219

Doi:10.19159/tutad.1294740

View : 81 | Download : 55

Publication Date : 2023-07-31

Article Type : Research Paper

Abstract :Heavy metals are naturally present in the soils in trace quantity. Besides, some soils include these elements at high levels resulting from the weathering of minerals or human activities. Contamination of these metals has been of great concern in the environment interrelatedly with their toxicity, persistence and non-degradability. So, this article aimed to evaluate heavy metal pollution by using several pollution indices contamination factor insert ignore into journalissuearticles values(CF);, degree of contamination insert ignore into journalissuearticles values(CD);, pollution load index insert ignore into journalissuearticles values(PLI);, summarization of the sources of heavy metals, and change of these metals along soil depth. For this purpose, 10 coordinated soil samples were taken from 0-20 cm and 20-40 cm depths in the rice fields of Bafra Plain in Samsun-Türkiye. In these samples, some physico-chemical soil characteristics insert ignore into journalissuearticles values(texture, pH, electrical conductivity, organic matter and lime content, available phosphorus and cation exchange capacity); and heavy metal contents Zinc insert ignore into journalissuearticles values(Zn);, copper insert ignore into journalissuearticles values(Cu);, nickel insert ignore into journalissuearticles values(Ni);, cobalt insert ignore into journalissuearticles values(Co);, cadmium insert ignore into journalissuearticles values(Cd);, chromium insert ignore into journalissuearticles values(Cr); and lead insert ignore into journalissuearticles values(Pb); were determined. According to the results, metal contents were determined between 39.79-58.44 mg kg-1, 32.15-68.31 mg kg-1, 75.68-132.6 mg kg-1, 11.95-18.02 mg kg-1, 0.001-0.278 mg kg-1, 61.88-102.5 mg kg-1, and 9.942-14.67 mg kg-1 for Zn, Cu, Ni, Co, Cd, Cr and Pb, respectively. While Cd content was higher at 0-20 cm depth, Cr, Ni and Zn values were higher at 20-40 cm. Cu, Pb and Co values did not show significant change with depth. Average CF values for heavy metals were determined as Ni>Pb>Cr>Cu>Cd>Zn>Co. Degree of contamination values varied between 4.922-7.848 and PLI values varied between 0.946-1.028. In all elements, CF and CD values were classified in the group of low and moderate contamination. Besides, significant relationships were found between soil physicochemical properties, heavy metal concentrations and pollution indices.
Keywords : Rice, heavy metal, soil, pollution indices