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本工作选择了由美国环境保护局认定为优先污染物的4种酚作为模拟污染物,采用盆栽方法,研究了人工施加于盆土的酚类污染物对水稻发育的影响,及在土壤─水稻系统中经过一个生长期后的残留特点。结果表明,水稻土中酚浓度在600mg/kg以上时,水稻秧苗不能成活。酚浓度不超过100mg/kg,水稻发育正常。酚浓度为75mg/kg和100mg/kg时,水稻土个硝基酚和五氯酚平均残留率分别为2.2%和3.7%,水稻根中检出五氯酚和二氯酚。五氯酚在根中检出浓度与施入浓度呈正相关。
In this study, four kinds of phenols identified as priority pollutants by the U.S. Environmental Protection Agency were selected as simulated pollutants. Pot experiments were conducted to study the effects of phenolic pollutants manually applied to potting soil on paddy rice development. System after a period of growth after the residue characteristics. The results showed that rice seedlings could not survive when the phenol concentration in paddy soil was above 600mg / kg. Phenol concentration does not exceed 100mg / kg, rice development is normal. At the concentrations of 75 mg / kg and 100 mg / kg, the average residue rates of nitrophenol and pentachlorophenol in paddy soil were 2.2% and 3.7%, respectively. Pentachlorophenol and dichlorophenol were detected in rice roots. Pentachlorophenol concentration detected in the root and the concentration was positively correlated.