Chemical influences on trace metal-sulfide interactions in anoxic sediments

黄铁矿 硫化物 化学 无机化学 氧化还原 氧阴离子 缺氧水域 硫化物矿物 动力学 硝酸 环境化学 矿物学 有机化学 催化作用 物理 量子力学
作者
John W. Morse,George W. Luther
出处
期刊:Geochimica et Cosmochimica Acta [Elsevier BV]
卷期号:63 (19-20): 3373-3378 被引量:708
标识
DOI:10.1016/s0016-7037(99)00258-6
摘要

Interactions of trace metals with sulfide in anoxic environments are important in determining their chemical form and potential toxicity to organisms. In recent years, a considerable body of observational data has accumulated that indicates very different behavior for various trace metals in sulfidic sediments. These differences in behavior cannot be entirely attributed to thermodynamic relationships, but also reflect differences in ligand exchange reaction kinetics, and redox reaction pathways. Pb, Zn, and Cd, which are generally pyritized to only a few percent of the “reactive” fraction, have faster water exchange reaction kinetics than Fe2+, resulting in MeS phases precipitating prior to FeS formation and subsequent pyrite formation, whereas, Co and Ni, which have slower H2O exchange kinetics than Fe2+, are incorporated into pyrite. Although Hg and Cu have faster reaction kinetics than Fe2+, both are incorporated into pyrite or leached from the pyrite fraction with nitric acid. Hg undergoes significant chloride complexation, which can retard reaction with sulfide, but can also replace Fe in FeS to form HgS, which can only be dissolved in the pyrite fraction. Cu2+ is reduced by sulfide and forms a variety of sulfides with and without Fe that can only be dissolved with nitric acid. Mn2+ does not form a MnS phase easily and is incorporated into pyrite at high iron degrees of pyritization (DOP). Oxyanions of Mo and As are first reduced by sulfide. These reduced forms may then react with sulfides resulting in incorporation into pyrite. However, the oxyanion of Cr is reduced to Cr3+, which is kinetically inert to reaction with sulfide and, therefore, not incorporated into pyrite.
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
刚刚
1秒前
Ava应助坚定路人采纳,获得10
3秒前
5秒前
6秒前
潘善若发布了新的文献求助10
6秒前
戴岱发布了新的文献求助10
8秒前
9秒前
10秒前
momo发布了新的文献求助10
12秒前
大模型应助潘善若采纳,获得10
12秒前
13秒前
jolt发布了新的文献求助10
14秒前
15秒前
传奇3应助戴岱采纳,获得10
16秒前
nini完成签到,获得积分10
18秒前
zzzjh发布了新的文献求助10
18秒前
量子星尘发布了新的文献求助10
19秒前
19秒前
21秒前
22秒前
nini发布了新的文献求助10
25秒前
Lucas应助XAN采纳,获得10
26秒前
潘善若发布了新的文献求助10
26秒前
棠棠完成签到 ,获得积分10
26秒前
29秒前
yyer完成签到,获得积分10
29秒前
31秒前
FashionBoy应助潘善若采纳,获得10
32秒前
慕青应助忐忑的阑香采纳,获得10
32秒前
momo发布了新的文献求助10
33秒前
冰淇淋完成签到,获得积分10
33秒前
XylonYu完成签到,获得积分10
34秒前
36秒前
坚定路人发布了新的文献求助10
38秒前
张宁波完成签到,获得积分0
39秒前
sue完成签到,获得积分10
40秒前
41秒前
慕青应助害羞的山柏采纳,获得10
42秒前
平常的可乐完成签到 ,获得积分10
44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 3989297
求助须知:如何正确求助?哪些是违规求助? 3531418
关于积分的说明 11253893
捐赠科研通 3270097
什么是DOI,文献DOI怎么找? 1804884
邀请新用户注册赠送积分活动 882087
科研通“疑难数据库(出版商)”最低求助积分说明 809158