The study on metal(loid) contamination of sediment in river upstream is lacking. The content, pollution, risk and source of ten metal(loid)s (As, Co, Pb, Cu, Ni, Cr, V, Mn, Ba, and Zn) in the upstream sediment of Danjiang River, China were investigated to explore the environmental quality of headwater area. The pollution levels were ascertained by geo-accumulation index, enrichment factor, and pollution load index and ecological risks were evaluated by sediment quality guidelines (SQGs) and potential ecological risk index. The results indicated that the mean contents of the determined metal(loid)s except As in the sediment exceeded their corresponding background values. All determined metal(loid)s except As, Ni, and Cr in the upstream sediment of Danjing River presented a certain degree pollution. The comprehensive pollution and overall ecological risk of the metal(loid)s in the sediment were moderate. The combination of As, Cu, Cr, Pb, Ni, and Zn in most samples might have 21% probability of being toxicity in terms of the SQGs results. Four main sources were identified for the metal(loid)s: Cu, Ni, Mn, and V were mainly originated from agricultural and natural sources; As, Ba, Pb, and Zn affected by traffic and industrial sources; Co originated from building material and Cr was mainly from natural source.

缺乏对上游河流沉积物的金属（胶体）污染的研究。研究了丹江上游沉积物中十种金属（砷，钴，铅，铜，镍，铬，钒，锰，钡和锌）的含量，污染，风险和来源，以探索源头地区的环境质量。通过地质累积指数，富集因子确定污染水平，并通过沉积物质量准则（SQG）和潜在生态风险指数评估污染负荷指数，并评估生态风险。结果表明，沉积物中除砷外，所测定的金属（金属）的平均含量超过了其相应的背景值。丹江上游沉积物中除砷，镍，铬外的所有确定的金属（金属）均具有一定程度的污染。沉积物中金属（金属）的综合污染和总体生态风险中等。就SQG结果而言，大多数样品中As，Cu，Cr，Pb，Ni和Zn的组合可能具有21％的毒性。确定了四种主要的金属（铜）来源：Cu，Ni，Mn和V主要来自农业和自然资源。砷，钡，铅和锌受交通和工业来源的影响；Co源自建筑材料，而Cr主要来自自然资源。锌受交通和工业来源的影响；Co源自建筑材料，而Cr主要来自自然资源。锌受交通和工业来源的影响；Co源自建筑材料，而Cr主要来自自然资源。