Catchment land use effect on mercury concentrations in lake sediments: A high-resolution study of Qinghai Lake
文献类型：期刊论文
| 作者 | Dai, Lijun; Zhang, Bo5; Liao, Xiaoyong; Wang, Lingqing; Zhang, Qian; Tian, Shuhan4; Liang, Tao; O'Connor, David; Rinklebe, Joerg2 |
| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 出版日期 | 2024-03-15 |
| 卷号 | 916页码:170260 |
| 关键词 | Mercury pollution Sediment pollution Catchment land use Tibetan plateau ecosystem Biogeochemical cycling |
| DOI | 10.1016/j.scitotenv.2024.170260 |
| 产权排序 | 1 |
| 文献子类 | Article |
| 英文摘要 | Mercury (Hg) contamination in aquatic environments presents a significant ecological and human health concern. This study explored the relationship between catchment land use and Hg concentrations within Qinghai Lake sediment, the largest lake in China, situated on the Qinghai -Tibet plateau. The study entailed detailed mapping of Hg sediment concentrations and a subsequent environmental risk assessment. Considering the complex nature of the plateau landform and surface vegetation, the study area was delineated at a 100 km radius centered on Qinghai Lake, which was divided into 30 sectors to quantify relationships between land use and the sediment Hg concentration. The results revealed a mean sediment Hg concentration of 29.91 mu g/kg, which was elevated above the background level. Kendall's correlation analysis revealed significant but weak associations between sediment Hg concentrations and three land use types: grassland (rangeland and trees) (rs = 0.27, p < 0.05), crops (rs = -0.37, p < 0.05), and bare ground (rs = -0.25, p < 0.1), suggesting that growing areas of grassland correlated with higher Hg levels in the lake sediment, in contrast to bare ground or crops area, which correlated with lower Hg concentrations. Multiple linear regression models also observed weak negative relationships between bare ground and crops with sediment Hg concentration. This research methodology enhances our understanding of the impact of land use on Hg accumulation in lake sediments and underscores the need for integrated watershed management strategies to mitigate Hg pollution in Qinghai Lake. |
| WOS关键词 | ATMOSPHERIC MERCURY ; SURFACE SEDIMENTS ; METHYL-MERCURY ; METAL POLLUTION ; ORGANIC-CARBON ; HEAVY-METALS ; FOREST FLOOR ; RIVER-BASIN ; DEPOSITION ; SOILS |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:001175214600001 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/203361]  |
| 专题 | 陆地表层格局与模拟院重点实验室_外文论文 |
| 作者单位 | 1.Univ Wuppertal, Inst Fdn Engn Water and Waste Management, Sch Architecture & Civil Engn, Pauluskirchstr 7, D-42285 Wuppertal, Germany 2.Royal Agr Univ, Sch Real Estate & Land Management, Stroud Rd, Cirencester GL7 6JS, England 3.Qingdao Univ, Sch Publ Hlth, Dept Occupat & Environm Hlth, Qingdao 266021, Peoples R China 4.Beijing Municipal Ecol Environm Bur, Beijing 100161, Peoples R China 5.Inst Geog Sci & Nat Resources Res, Chinese Acad Sci, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Dai, Lijun,Zhang, Bo,Liao, Xiaoyong,et al. Catchment land use effect on mercury concentrations in lake sediments: A high-resolution study of Qinghai Lake[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2024,916:170260. |
| APA | Dai, Lijun.,Zhang, Bo.,Liao, Xiaoyong.,Wang, Lingqing.,Zhang, Qian.,...&Rinklebe, Joerg.(2024).Catchment land use effect on mercury concentrations in lake sediments: A high-resolution study of Qinghai Lake.SCIENCE OF THE TOTAL ENVIRONMENT,916,170260. |
| MLA | Dai, Lijun,et al."Catchment land use effect on mercury concentrations in lake sediments: A high-resolution study of Qinghai Lake".SCIENCE OF THE TOTAL ENVIRONMENT 916(2024):170260. |
入库方式： OAI收割
来源：地理科学与资源研究所
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