CAJ | 학술논문

采用现场采样及室内分析测试方法,研究了岩溶地区某铅锌矿厂区下游水田表层土壤及典型剖面中Cu、Zn、Pb、Cd的污染特征及其在剖面上的垂向迁移特性.结果表明,厂区下游水田表层土壤Cu、Zn、Pb、Cd的含量范围分别为35-89 mg·k~(-1)、1 440-11 100mg·kg~(-1)、249-4610mg·kg~(-1)、8.3-61.6mg·kg~(-1).除Cu的污染程度较轻外,Zn、Pb、Cd的污染达到了中度到极重污染的水平,且以Cd的污染最为严重.沿灌溉渠往下,表层土壤受到的污染越来越小,污染指数呈下降趋势.Cu、Zn、Pb、Cd在典型土壤剖面上均呈现出极为明显的向下迁移趋势.在0~20cm,4种重金属的含量均较大;从20 cm往下至180cm,其变化趋势基本上是先升高后降低,向下迁移的浓度峰值均出现在60-120 cm,但各元素向下迁移的规律略有差异.cd向下迁移浓度峰值出现的深度比Cu、Zn、Pb的要深.
채용현장채양급실내분석측시방법,연구료암용지구모연자광엄구하유수전표층토양급전형부면중Cu、Zn、Pb、Cd적오염특정급기재부면상적수향천이특성.결과표명,엄구하유수전표층토양Cu、Zn、Pb、Cd적함량범위분별위35-89 mg·k~(-1)、1 440-11 100mg·kg~(-1)、249-4610mg·kg~(-1)、8.3-61.6mg·kg~(-1).제Cu적오염정도교경외,Zn、Pb、Cd적오염체도료중도도겁중오염적수평,차이Cd적오염최위엄중.연관개거왕하,표층토양수도적오염월래월소,오염지수정하강추세.Cu、Zn、Pb、Cd재전형토양부면상균정현출겁위명현적향하천이추세.재0~20cm,4충중금속적함량균교대;종20 cm왕하지180cm,기변화추세기본상시선승고후강저,향하천이적농도봉치균출현재60-120 cm,단각원소향하천이적규률략유차이.cd향하천이농도봉치출현적심도비Cu、Zn、Pb적요심.
The pollution characteristics of Cu, Zn, Pb, and Cd in downstream paddy soil near a typical Pb-Zn mining region in the karst area are investigated, and their migration regularity in the soil profiles is also studied. The results show that the contents of Cu, Zn, Pb, and Cd in topsoil(0～20 cm) are 35～89, 1 440～11 100, 249～4 610, and 8.3～61.6 mg·kg~(-1) respectively. The topsoil is moderately and seriously polluted by Zn, Pb, and Cd, and excessively by Cd, only slightly by Cu. The contaminated degree in the topsoil decreases gradually along the irrigation channel and the pollution index indicates downward trend. In the representative soil profiles, Cu, Zn, Pb, and Cd transfer obviously from top-soil to subsoil, where their contents are larger than that in the topsoil, and from 20 to 180 cm their contents rise before reaching the peak of 60～120 cm, and then decline. There are some differences in the migration regularity among the four metals. The peak of Cd content appears in much deeper soil than that of the others.