| 某铅蓄电池厂土壤中铅的含量分布特征及生态风险 |
| 摘要点击 2381 全文点击 1597 投稿时间：2012-08-10 修订日期：2012-11-13 |
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| 中文关键词 铅蓄电池厂 土壤污染 铅 空间分布 生态风险 |
| 英文关键词 lead battery plant soil contamination lead spatial distribution ecological risk |
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| 中文摘要 |
| 以西南地区某搬迁铅蓄电池厂为研究对象,在不同车间分层采集了48个(共18个土壤样点,其中3个样点只采集表层,15个样点分0~20、20~40、40~60 cm三层采集)土壤样本,利用电感耦合等离子体发射光谱(ICP-OES)检测了土壤中铅的含量,研究了铅在该蓄电池厂不同车间表层土壤中的累积状况和土壤剖面中铅的垂直分布特征并对其进行了生态风险评价. 结果表明:①该搬迁铅蓄电池厂不同车间表层土壤(0~20 cm)中铅的含量介于 18.18~52332.50 mg ·kg-1 之间,其最大含量严重超过国家相应标准(HJ 350-2007); 土壤中铅的累积排序为:4车间>2车间>废铅存放坑>污水处理站>3车间>5车间>1车间>原4车间>包装车间>办公区. ②在该厂区内,铅的剖面分布表明土层深度对铅的累计无显著影响; 与一般的自然土壤或城市土壤中铅在表层的累积情况不同,铅在土壤的不同深度均能实现较高的累积. ③Hakanson潜在生态危险指数法评价结果表明,该厂区内土壤中的铅普遍存在生态风险,在大量富集的车间存在"很强的生态风险",该铅蓄电池厂局部富集的场地如果要开发利用,必须经过修复治理. |
| 英文摘要 |
| Soil samples were collected from 18 sites at a relocated lead accumulator factory in the Southwest region, China. Among the 15 sample sites, profile soil samples at 0-20 cm, 20-40 cm and 40-60 cm were taken. Soil lead contents were analyzed by inductively coupled plasma-optical emission spectroscopy (ICP-OES). Characteristics of Pb in topsoil and soil profiles collected from different sampling sites were discussed. Results showed that: ① The total Pb contents in topsoil(0-20 cm)ranged from 18.18 to 52332.50 mg ·kg-1. The maximum content greatly exceeded the national standard (HJ 350-2007). The Pb concentration in different workshops followed a decreasing order: the fourth workshop>the second workshop>waste lead storage pit>sewage works>the third workshop>the fifth workshop>the first workshop>the original fourth workshop>the packing workshop>the office area. ② Results of profile distribution showed that soil depth had no significant effect on Pb content. Lead can be highly accumulated at different depths of the soil, which was quite different from natural soils.③ Hakanson's potential ecological risk index evaluation showed that there was widespread ecological risk in the soil of the plant, and serious ecological risk existed in some workshops where a large number of lead was enriched. Therefore, the site must be restored in order to reuse it. |
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