Evaluation of Growth Characteristics and Lead Uptake of Lettuce under different application levels of Bottom Ash

Abstract

BACKGROUND: Most of the bottom ash(BA) from wood pellet-based thermal power plants that is not recycled is placed into landfill. BA has a function and structure similar to biochar. Hence, BA is classified as waste, but, it is predicted that BA can be used agricultural utilization. METHODS AND RESULTS: To investigate the effect of BA application on lettuce, growth characteristics and Pb contents were examined with BA application levels(0, 1, 2, 3 and 4 g/L), respectively, in hydroponic cultivation with Pb solution. Irrespective with BA application levels, the length, leaf number and fresh weight of lettuce in BA treatments were increased by 84.3~120, 36.2~39.0, and 215~322%, respectively, compared to the BA-0 treatment. The groups with BA treatments, Pb in the nutrient solution was adsorbed to the BA due to the surface area and functional groups of the BA, and the lettuce growth was maintained more smoothly than in the BA-0 treatment. BA application is considered to have created a favorable environment for lettuce growth in hydroponic cultivation with Pb solution. CONCLUSION(S): Although direct comparing the removal effect of heavy metal between BA and biochar is not present, the BA application in contaminated area suggested a significant meaning on the recycling waste, and increasing potential crop productivity by immobilizing heavy metal.

Effect of Saline Soil and Crop Growth with Bottom Ash from Biomass Power Plant Based Wood Pellet

“…또한, 발전소의 폐기물 매립지 대부분이 포 화상태이며, 매립지에서 빗물과 바람에 의해 주변의 환경 오염 을 일으켜 원인 물질로 보고된 바 있다 [2]. 이에 따라, 바이오 매스 발전소에서 발생하는 폐기물을 활용하기 위한 연구가 활 발히 진행되고 있는 가운데 [3], 그 중 저회의 흡착능력을 활용 하여 중금속, 폐수 오염물질 제거 등 다양한 연구를 통해 흡착 능력이 효과적인 것으로 보고된 바이다 [4][5][6].…”