Assessment of Heavy Metal(loid)s Pollution in Arable Soils near Industrial Complex in Gyeongsang Provinces of South Korea

다국어 초록 (Multilingual Abstract)

Industrial complex releasing huge amounts of dusts, fumes and wastewater containing heavy metal(loid)s couldbe a source of heavy metal(loid)s pollution in arable soil. Heavy metal(loid)s pollution in arable soil adverselyaffect crops safety, subsequently human being. Hence, it is important to accurately assess the heavy metal(loid)spollution in soil using pollution indices. The objectives of this study are 1) to compare assessment methods ofheavy metal(loid)s pollution in arable soils located near industrial complex in Gyeongsang provinces and 2) todetermine the relationship between concentration of plant available heavy metal(loid)s and chemical propertiesof soil. Soil samples were collected from 85 sites of arable lands nearby 10 industrial complex in Gyeongsangprovinces. The average total concentration of all heavy metal(loid)s of the studied soils was higher than that ofKorean arable soils but did not exceed the warning criteria established by the Soil Environmental ConservationAct of Korea. Only six sites of arable soils for the total concentration of As, Cu and Ni exceeded the warningcriteria (As: 25 mg kg-1, Cu: 150 mg kg-1, Ni: 100 mg kg-1). The contamination factor (CF) and geoaccumulationindex (Igeo) of the heavy metal(loid)s in arable soils varied among the sampling sites, and the average values ofAs and Cd were relatively higher than that of other metals. Results of integrated indices of As and Cd in arablesoils located near industrial complex indicated that some arable soils were moderately or heavily polluted. Theplant available concentration of heavy metal(loid)s was negatively related to the soil pH and negative charge ofsoil. Available Cd, Pb, and Zn concentrations had relatively high correlation coefficient with pH and negativecharge of soil when compared with other heavy metal(loid)s. Based on the above results, it might be a good soilmanagement to control pH with soil amendments such as lime and compost to reduce phytoavailability of heavymetal(loid)s in arable soil located near industrial complex.

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