CAJ | 학술논문

为初步探讨粒径大小对污染物迁移循环机制的影响，分析了广东省海陵湾水体中的悬浮颗粒与表层沉积物中不同粒径颗粒的质量分布特征和正构烷烃的空间分布。结果表明，此区域水体中的悬浮物的絮凝临界粒径约在细颗粒(Φ<30μm)范围内。悬浮颗粒与表层沉积物中的正构烷烃的富集能力受多种因素作用，其中不同粒径组分的有机质的组成与类型及污染物的来源是重要的影响因素。水体底层细粒径中 nC31的浓度增加说明水流作用与颗粒物粒径大小是影响海底沉积物再悬浮的重要参数。
위초보탐토립경대소대오염물천이순배궤제적영향，분석료광동성해릉만수체중적현부과립여표층침적물중불동립경과립적질량분포특정화정구완경적공간분포。결과표명，차구역수체중적현부물적서응림계립경약재세과립(Φ<30μm)범위내。현부과립여표층침적물중적정구완경적부집능력수다충인소작용，기중불동립경조분적유궤질적조성여류형급오염물적래원시중요적영향인소。수체저층세립경중 nC31적농도증가설명수류작용여과립물립경대소시영향해저침적물재현부적중요삼수。
Occurrence of n-alkanes in sediments and suspended particulate matter (SPM) was examined to gain a better understanding of the distribution and transport of this class of contaminants in relation to particle grain size distribution. The samples were studied in five grain size fractions for sediment (fromΦ<450μm toΦ<30μm) and three grain size fractions for SPM (from Φ> 63 μm to Φ< 30 μm). The study illustrates that the maximal flocculation diameter of fine suspended particulate matter in study areas was 30μm. And the type and structure of organic matter and the source of pollutants play an important role in n-alkane distribution in different grain size particles in SPM and sediments fractions. The contents of nC31 in fine-size fraction of SPM were higher than those in sediment on the sampling site, which indicated that water current and grain size of particulate matter are the chief contributor of bed-sediment re-suspension.