Impacts of spectral characteristics of dissolved organic matter on methylmercury contents in peatlands, Northeast China

溶解有机碳 泥炭 甲基汞 环境化学 化学 腐殖质 Mercury(编程语言) 有机质 湿地 土壤水分 土壤有机质 环境科学 土壤科学 生态学 生物累积 计算机科学 生物 有机化学 程序设计语言
作者
Xin Yuan,Xuehui Zhang,Dongmei Zheng,Zhongsheng Zhang,Ming Jiang
出处
期刊:Environmental Geochemistry and Health [Springer Science+Business Media]
卷期号:45 (3): 913-923 被引量:6
标识
DOI:10.1007/s10653-022-01257-1
摘要

Dissolved organic matter (DOM) plays an important role in promoting or suppressing methylmercury (MeHg) production in wetlands. However, the effects of DOM spectral characteristics on MeHg levels remain poorly understood in boreal peatlands in Northeast China, where is undergoing remarkable climate warming. In the present work, soil samples were collected from 22 peatlands in the Greater Khingan Mountains (GKM) to test the hypothesis that DOM spectral properties control MeHg levels. DOM was characterized by UV–Vis absorption and fluorescence spectroscopy; the three-dimensional fluorescence excitation-emission matrix (EEM) was used to unveil the origin of DOM. The average total mercury (THg) and MeHg contents were 112.76 µg/kg and 12.43 µg/kg across all peatlands, respectively. There was a significantly positive correlation between MeHg and the longitude spanning the range from 120 to 123°E (p < 0.05). Proportions of MeHg to THg (%MeHg), 12.3% on average, were positively correlated with DOM humification degree at p < 0.05 level. Protein-like components of DOM (P-like) were negatively related to %MeHg. DOM had positive effects on THg, and P-like components, HIX and BIX can negatively affect THg as well as MeHg. Our findings demonstrate that the spectral characteristics of DOM in soil are crucial to the content of methyl mercury in the GKM soil.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
老吴发布了新的文献求助10
1秒前
2秒前
佳语妍说完成签到,获得积分10
3秒前
4秒前
5秒前
酷波er应助平淡的凝竹采纳,获得10
6秒前
8秒前
小星星发布了新的文献求助10
8秒前
田様应助c_123采纳,获得10
8秒前
11秒前
11秒前
无所归兮应助微7采纳,获得30
11秒前
英姑应助tracy采纳,获得30
12秒前
天天快乐应助耍酷问兰采纳,获得10
13秒前
16秒前
18秒前
酷酷飞烟完成签到,获得积分10
19秒前
英姑应助开放的煎蛋采纳,获得10
20秒前
21秒前
22秒前
小青年儿完成签到 ,获得积分10
23秒前
23秒前
追寻书白发布了新的文献求助10
23秒前
耍酷问兰发布了新的文献求助10
24秒前
tracy发布了新的文献求助30
24秒前
24秒前
25秒前
英姑应助莹0000采纳,获得10
25秒前
Kris发布了新的文献求助10
27秒前
我是老大应助牛马采纳,获得10
28秒前
科研通AI2S应助鳗鱼思真采纳,获得10
32秒前
Liufgui应助机灵的觅山采纳,获得10
35秒前
35秒前
上官若男应助Kris采纳,获得10
36秒前
酷波er应助追寻书白采纳,获得10
37秒前
38秒前
39秒前
小北完成签到,获得积分10
41秒前
李健应助Ch_7采纳,获得10
41秒前
41秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
‘Unruly’ Children: Historical Fieldnotes and Learning Morality in a Taiwan Village (New Departures in Anthropology) 400
Indomethacinのヒトにおける経皮吸収 400
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
基于可调谐半导体激光吸收光谱技术泄漏气体检测系统的研究 350
Robot-supported joining of reinforcement textiles with one-sided sewing heads 320
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3989069
求助须知:如何正确求助?哪些是违规求助? 3531351
关于积分的说明 11253589
捐赠科研通 3269939
什么是DOI,文献DOI怎么找? 1804851
邀请新用户注册赠送积分活动 882074
科研通“疑难数据库(出版商)”最低求助积分说明 809073