土壤中酚污染物对水稻发育的影响及其残留特点的研究

本工作选择了由美国环境保护局认定的优先污染物的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，水稻土中硝基酚和五氯酚平均残留率分别为２．２％和３．７％，水稻根

Effect of Phenols in Soil on Development of Rice and Phenolic Residual Characteristics

This work studies the effect of phenols in paddy soil on the development of rice and phenolic residual characteristics in rice/soil system via pot tests. Four kinds of phenols which are confirmed as priority pollutants that by EPA were chosen for monitor pollutants.Results showed that rice couldn't survive the conyaminated level higher than 600 mg/kg in paddy soil. According to the ratio of amending, residue of 2, 4-Dichlorophenol and pentachlorophenol were detected in the paddy soil of 75 mg/kg and 3. 7% resultes in average residual Percentage 2. 2% and 3.7% respectively. Pentachlorophenol and 2, 4-Dichlorophenol were detected in rice root. The pentachlorophenol'S concentration was Positive correlated with the amended concentration.