Kim Shin Woong, Chae Yooeun, Moon Jongmin, Kim Dokyung, Cui Rongxue, An Gyeonghyeon, Jeong Seung-Woo, An Youn-Joo
Department of Environmental Health Science, Konkuk University , Seoul 05029, Korea.
Department of Environmental Engineering, Kunsan National University , Kunsan 54150, Korea.
J Agric Food Chem. 2017 Feb 15;65(6):1239-1246. doi: 10.1021/acs.jafc.6b04339. Epub 2017 Feb 2.
Soils contaminated with heavy metals have been reused for agricultural, building, and industrial uses following remediation. This study assesses plant growth and bioaccumulation of heavy metals following remediation of industrially contaminated soil. The soil was collected from a field site near a nonferrous smelter and was subjected to laboratory- and field-scale studies. Soil from the contaminated site was remediated by washing with acid or mixed with soil taken from a distant uncontaminated site. The activities of various soil exoenzymes, the rate of plant growth, and the bioaccumulations of six heavy metals were measured to assess the efficacy of these bioremediation techniques. Growth of rice (Oryza sativa) was unaffected in acid-washed soil or the amended soil compared to untreated soil from the contaminated site. The levels of heavy metals in the rice kernels remained within safe limits in treated and untreated soils. Rice, sorghum (Sorghum bicolor), and wheat (Triticum aestivum) cultivated in the same soils in the laboratory showed similar growth rates. Soil exoenzyme activities and crop productivity were not affected by soil treatment in field experiments. In conclusion, treatment of industrially contaminated soil by acid washing or amendment did not adversely affect plant productivity or lead to increased bioaccumulation of heavy metals in rice.
经过修复后，被重金属污染的土壤已被重新用于农业、建筑和工业用途。本研究评估了工业污染土壤修复后植物的生长情况以及重金属的生物累积情况。土壤取自一个有色金属冶炼厂附近的田地，并进行了实验室规模和田间规模的研究。污染场地的土壤通过酸洗或与取自远处未受污染场地的土壤混合进行修复。测量了各种土壤外酶的活性、植物生长速率以及六种重金属的生物累积量，以评估这些生物修复技术的效果。与污染场地未经处理的土壤相比，在酸洗土壤或改良土壤中，水稻（Oryza sativa）的生长未受影响。在处理过的和未处理的土壤中，水稻籽粒中的重金属含量均保持在安全限值内。在实验室中，种植在相同土壤中的水稻、高粱（Sorghum bicolor）和小麦（Triticum aestivum）表现出相似的生长速率。在田间试验中，土壤外酶活性和作物生产力不受土壤处理的影响。总之，通过酸洗或改良处理工业污染土壤，不会对植物生产力产生不利影响，也不会导致水稻中重金属的生物累积增加。
