摘要
采用网格采样法,在渤海湾潮间带泥质区、泥沙过渡区和粉沙区分别以10 m和1 m为间隔,采集了384个表层沉积物样品,对Al、Fe、Ti、Mn、Ba、Sr、Zn、Cr、Ni、Cu 10种重金属含量特征进行研究,对比了潮间带不同粒度沉积物中重金属的蓄积特征.结果表明,10种重金属在淤泥、泥沙混合、粉沙3种研究区的总含量分别为147.37、98.68和94.27 g.kg-1,粒度变化造成重金属含量的显著分异;除Ba、Sr倾向在富含长石的粗颗粒区富集外,多数重金属元素呈现细颗粒区富集倾向;Sr含量受粒度变化影响最大,而Cr、Ti含量受粒度变化影响相对较小.
384 surface sediment samples were collected from mud flat, silt flat and mud-silt flat of Bohai Bay by 1 m and 10 m interval using grid sampling method. Concentrations of Al, Fe, Ti, Mn, Ba, Sr, Zn, Cr, Ni and Cu in each sample were measured by ICP-AES. To figure out the random distribution and concentration characteristics of these heavy metals, concentration of them were compared between districts with different grain size. The results show that varieties of grain size cause the remarkable difference in the concentration of heavy metals. Total concentration of heavy metals are 147.37 g·kg^-, 98.68 g·kg^- and 94.27 g·kg^-1 in mud fiat, mud-silt flat and silt flat respectively. Majority of heavy metals inclines to concentrate in fine grained mud, while Ba and Sr have a tendency to concentrate in coast grained silt which contains more K2 O· Al2O3·6SiO2 . Concentration of Sr is affected significantly by the grain size, while concentration of Cr and Ti are affected a little by the grain size. Key words：
出处
《环境科学》
EI
CAS
CSCD
北大核心
2008年第2期421-427,共7页
Environmental Science
基金
中国科学院地理科学与资源研究所海外杰出学者客座研究基金项目
国家自然科学基金项目(40101027)
关键词
潮间带
网格采样
重金属
沉积物
粒度
intertidalite
grid sampling method
heavy metals
sediment
grain size
