CAJ | 학술논문

分析湖南省某铁合金厂附近重金属铬在土壤中的分布及迁移特征,在土壤-植物系统中的迁移转化规律,以及铬污染蔬菜对人体的健康风险.结果表明:铁合金厂外排污口、污灌区和对照区土壤的铬含量平均值分别为2 239.5,995.33和104.9 mg/kg.总铬在排污口附近土壤中主要富集在地表下200-400 mm；在污灌区,主要富集于地表下0-200 mm;而在对照区,铬浓度从上至下逐渐降低且各层之间富集浓度相差不大.结果也表明芹菜、莴苣和白菜均能够把土壤中吸收的致毒性较强的六价铬转化成低毒的三价铬,且蔬菜中的铬含量平均值为11.95mg/kg.铬在土壤-蔬菜中的生物富集因子大小依次为:白菜＞莴苣＞芹菜.居民每天摄入的铬含量严重超过食物中最大铬允许摄入量,表明铬污染对当地居民存在一定的健康风险.
분석호남성모철합금엄부근중금속락재토양중적분포급천이특정,재토양-식물계통중적천이전화규률,이급락오염소채대인체적건강풍험.결과표명:철합금엄외배오구、오관구화대조구토양적락함량평균치분별위2 239.5,995.33화104.9 mg/kg.총락재배오구부근토양중주요부집재지표하200-400 mm；재오관구,주요부집우지표하0-200 mm;이재대조구,락농도종상지하축점강저차각층지간부집농도상차불대.결과야표명근채、와거화백채균능구파토양중흡수적치독성교강적륙개락전화성저독적삼개락,차소채중적락함량평균치위11.95mg/kg.락재토양-소채중적생물부집인자대소의차위:백채＞와거＞근채.거민매천섭입적락함량엄중초과식물중최대락윤허섭입량,표명락오염대당지거민존재일정적건강풍험.
Study was carried out to analyze the distribution and migration patterns,soil-to-plant transfer and potential health risks of chromium in soil-vegetable system in areas near a ferro-alloy manufactory in Hunan province.The results show that soils near sewer outlet,sewer channel and in control area are averaged 2 239.5,995.33 and 104.9 mg/kg,respectively.The total Cr has a relative accumulation in soil depth of 200-400 mm near the sewer outlet,mainly enriches in the surface layer (0-200 mm) near the sewer channel and decreases gradually in unpolluted soils.The differential concentration level of enrichment between layers is little.The results also indicate that the three vegetables of celery,lettuce and Chinese cabbage are able to convert the potentially toxic Cr (Ⅵ)species into the non-toxic Cr (Ⅲ) species,and the chromium contents in the edible parts of the vegetables are averaged 11.95 mg/kg.The transfer factors of the three vegetables follow the order:Chinese cabbage ＞ lettuce ＞ celery.The estimated total daily intake of chromium substantially exceeds the dietary allowable value,which may pose health risks to local population.