亲爱的研友该休息了!由于当前在线用户较少,发布求助请尽量完整的填写文献信息,科研通机器人24小时在线,伴您度过漫漫科研夜!身体可是革命的本钱,早点休息,好梦!

Molecular composition and spatial distribution of dissolved organic matter (DOM) in the Pearl River Estuary, China

溶解有机碳 河口 环境化学 有机质 盐度 环境科学 生物地球化学循环 作文(语言) 富营养化 化学 营养物 海洋学 地质学 语言学 哲学 有机化学
作者
Chen He,Qiong Pan,Penghui Li,Wei Xie,Ding He,Chuanlun Zhang,Quan Shi
出处
期刊:Environmental Chemistry [CSIRO Publishing]
卷期号:17 (3): 240-240 被引量:69
标识
DOI:10.1071/en19051
摘要

Environmental contextEstuaries play an important role in global carbon cycling in terms of transforming dissolved organic matter (DOM). We describe the molecular composition and spatial distribution of DOM in the Pearl River Estuary, an area severely impacted by anthropogenic activities, and show how DOM composition gradually changes with salinity. The results will help our understanding of the sources and transformations of anthropogenic DOM discharged to the coastal seas. AbstractThe Pearl River is the second-largest river in China in terms of water discharge and brings enormous amounts of nutrients and terrestrial organic matter to the South China Sea, which makes the Pearl River Estuary (PRE) highly eutrophic. However, the molecular composition and distribution of dissolved organic matter (DOM) in the PRE have scarcely been investigated. In this study, solid-phase extraction (SPE) was performed to collect DOM samples from PRE along a salinity gradient. The samples were characterised by negative-ion electrospray ionisation (ESI) Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) to analyse their molecular composition and spatial distribution. The FT-ICR MS results showed that the terrestrial organic matter was gradually diluted and/or degraded during the migration from the river to the coastal ocean. Furthermore, both sulfur containing and unsaturated molecules were highly abundant in the upper stream samples, which indicated that anthropogenic input might be another important source of the assigned DOM in PRE. A group of bio-refractory molecules, characterised as carboxylic-rich alicyclic-like molecules, was found to accumulate with the increase of salinity. The composition of the SPE-DOM showed a gradual variation with the salinity and spatial changes; however, the variation was slightly different from those in pristine estuaries. This study demonstrates that the molecular composition of DOM is crucial for elucidating its source and transformation in an estuary.
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
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
lynn发布了新的文献求助30
1秒前
Lucas应助导师有他道理采纳,获得10
10秒前
Lucas应助舒适路人采纳,获得10
15秒前
24秒前
31秒前
www完成签到 ,获得积分10
31秒前
32秒前
清逸之风完成签到 ,获得积分10
34秒前
tanhaowen发布了新的文献求助10
36秒前
36秒前
星河圈揽发布了新的文献求助30
37秒前
Qvby3完成签到 ,获得积分10
37秒前
导师有他道理完成签到,获得积分10
39秒前
41秒前
星河圈揽完成签到,获得积分10
48秒前
lynn完成签到,获得积分10
53秒前
11111完成签到 ,获得积分10
55秒前
zxb完成签到,获得积分10
55秒前
油炸小甜糕砸完成签到,获得积分10
57秒前
Pengzhuhuai完成签到,获得积分10
1分钟前
lyy完成签到 ,获得积分10
1分钟前
科研通AI5应助科研通管家采纳,获得10
1分钟前
汉堡包应助科研通管家采纳,获得10
1分钟前
香蕉觅云应助科研通管家采纳,获得10
1分钟前
ding应助左肩微笑采纳,获得10
1分钟前
ChencanFang完成签到,获得积分10
1分钟前
若雨凌风应助Abner采纳,获得20
1分钟前
SciGPT应助小蒋快去写文章采纳,获得10
1分钟前
zzzzzz发布了新的文献求助10
1分钟前
1分钟前
1分钟前
ksrcc发布了新的文献求助10
1分钟前
1分钟前
李剑鸿发布了新的文献求助30
1分钟前
Ava应助拼搏流沙采纳,获得10
1分钟前
YY完成签到,获得积分20
1分钟前
无花果应助未雨绸缪采纳,获得10
1分钟前
2分钟前
深情安青应助寄草采纳,获得10
2分钟前
FLY完成签到,获得积分10
2分钟前
高分求助中
Les Mantodea de Guyane Insecta, Polyneoptera 2500
Mobilization, center-periphery structures and nation-building 600
Technologies supporting mass customization of apparel: A pilot project 450
China—Art—Modernity: A Critical Introduction to Chinese Visual Expression from the Beginning of the Twentieth Century to the Present Day 430
Tip60 complex regulates eggshell formation and oviposition in the white-backed planthopper, providing effective targets for pest control 400
A Field Guide to the Amphibians and Reptiles of Madagascar - Frank Glaw and Miguel Vences - 3rd Edition 400
China Gadabouts: New Frontiers of Humanitarian Nursing, 1941–51 400
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 物理 生物化学 纳米技术 计算机科学 化学工程 内科学 复合材料 物理化学 电极 遗传学 量子力学 基因 冶金 催化作用
热门帖子
关注 科研通微信公众号,转发送积分 3792399
求助须知:如何正确求助?哪些是违规求助? 3336688
关于积分的说明 10281848
捐赠科研通 3053424
什么是DOI,文献DOI怎么找? 1675608
邀请新用户注册赠送积分活动 803581
科研通“疑难数据库(出版商)”最低求助积分说明 761468