Effect of Soil Amendments on Soil Enzyme Activity of Paddy Soils Polluted with Arsenic

Abstract

This study was conducted to evaluate the effect of soil amendments on changes in enzyme activity in soils polluted with As. The effects of S and calcium superphosphate (CSP) on the activities of dehydrogenase, urease, arylsulfatase (ASF), β-glucosidase, and phosphatase (PHA) were measured in paddy soils. In CSPamended soil, As concentration in soil solution was lowest and rice growth increased. However, the activity of PHA was significantly lower for CSP-amended soil (0.9 -1.4 µmol h -1 g -1 ) than control and S-amended soils (2.3 -2.7 µmol h -1 g -1 ). As availability was reduced in CSP-and S-amended soils, and in those soils, the activities of ASF were approximately two times higher (2.4 -3.9 µmol h -1 g -1 ) than that in control (1.3 -2.0 µmol h -1 g -1 ). Overall, ASF activity could be used as an index for evaluating changes in quality of As-polluted paddy soils after amendment treatment.

Bioaccumulation of Lead, Cadmium, and Arsenic in a Mining Area and Its Associated Health Effects

“…As of 2020, 2428 abandoned mines have been identified in Korea [ 11 ]. In 1995–1996, some residents near the Gahak mine were exposed to heavy metals through crops grown in contaminated soil, and in 2004, Itai-itai disease was recorded in another mining area [ 12 , 13 , 14 ]. Accordingly, comprehensive analyses of soil and agricultural products are necessary for determining the overall level of environmental contamination and assessing the risk posed to residents living near mining areas.…”