Sequestration of Labile Organic Matter by Secondary Fe Minerals from Chemodenitrification: Insight into Mineral Protection Mechanisms

矿物 有机质 环境化学 化学 固碳 粘土矿物 环境科学 地球科学 地球化学 矿物学 地质学 二氧化碳 有机化学
作者
Shiwen Hu,Lirong Zheng,Hanyue Zhang,Yang Yang,Guojun Chen,Hanbing Meng,Kuan Cheng,Chao Guo,Wang Ying,Xiaomin Li,Tongxu Liu
出处
期刊:Environmental Science & Technology [American Chemical Society]
卷期号:58 (25): 11003-11015
标识
DOI:10.1021/acs.est.3c10134
摘要

Labile organic matter (OM) immobilized by secondary iron (Fe) minerals from chemodenitrification may be an effective way to immobilize organic carbon (OC). However, the underlying mechanisms of coupled chemodenitrification and OC sequestration are poorly understood. Here, OM immobilization by secondary Fe minerals from chemodenitrification was investigated at different C/Fe ratios. Kinetics of Fe(II) oxidation and nitrite reduction rates decreased with increasing C/Fe ratios. Despite efficient sequestration, the immobilization efficiency of OM by secondary minerals varied with the C/Fe ratios. Higher C/Fe ratios were conducive to the formation of ferrihydrite and lepidocrocite, with defects and nanopores. Three contributions, including inner-core Fe–O and edge- and corner-shared Fe–Fe interactions, constituted the local coordination environment of mineral–organic composites. Microscopic analysis at the molecular scale uncovered that labile OM was more likely to combine with secondary minerals with poor crystallinity to enhance its stability, and OM distributed within nanopores and defects had a higher oxidation state. After chemodenitrification, high molecular weight substances and substances high in unsaturation or O/C ratios including phenols, polycyclic aromatics, and carboxylic compounds exhibited a stronger affinity to Fe minerals in the treatments with lower C/Fe ratios. Collectively, labile OM immobilization can occur during chemodenitrification. The findings on OM sequestration coupled with chemodenitrification have significant implications for understanding the long-term cycling of Fe, C, and N, providing a potential strategy for OM immobilization in anoxic soils and sediments.
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
djdh完成签到 ,获得积分10
刚刚
肖果完成签到 ,获得积分10
3秒前
哭泣笑柳发布了新的文献求助10
4秒前
CipherSage应助长安采纳,获得10
5秒前
飒飒完成签到,获得积分10
6秒前
RONG完成签到 ,获得积分10
6秒前
落落完成签到,获得积分10
7秒前
Yan完成签到 ,获得积分10
8秒前
8秒前
谨慎的凝丝完成签到 ,获得积分10
9秒前
雨洋完成签到,获得积分10
10秒前
chi完成签到 ,获得积分10
11秒前
还单身的湘完成签到,获得积分10
13秒前
fyjlfy完成签到 ,获得积分10
13秒前
深情安青应助Nayvue采纳,获得10
14秒前
研友_Y59785完成签到,获得积分0
14秒前
Xiaoxiao发布了新的文献求助10
15秒前
初初见你完成签到,获得积分10
22秒前
25秒前
思源应助淡淡月饼采纳,获得20
25秒前
dd完成签到 ,获得积分10
26秒前
Nayvue发布了新的文献求助10
30秒前
未来的幻想完成签到,获得积分10
32秒前
Kvolu29完成签到,获得积分10
33秒前
长理物电强完成签到,获得积分10
34秒前
若安在完成签到,获得积分10
35秒前
完美世界应助潘特采纳,获得10
36秒前
拼搏问薇完成签到 ,获得积分10
36秒前
单薄乐珍完成签到 ,获得积分0
39秒前
张静枝完成签到 ,获得积分10
39秒前
六步郎完成签到,获得积分10
39秒前
啊怙纲完成签到 ,获得积分10
41秒前
量子星尘发布了新的文献求助10
43秒前
scott_zip完成签到 ,获得积分10
44秒前
gxl完成签到,获得积分0
48秒前
xxx完成签到 ,获得积分10
51秒前
51秒前
努力生活的小柴完成签到,获得积分10
53秒前
55秒前
tangyong完成签到,获得积分10
57秒前
高分求助中
【提示信息,请勿应助】关于scihub 10000
Les Mantodea de Guyane: Insecta, Polyneoptera [The Mantids of French Guiana] 3000
徐淮辽南地区新元古代叠层石及生物地层 3000
The Mother of All Tableaux: Order, Equivalence, and Geometry in the Large-scale Structure of Optimality Theory 3000
Handbook of Industrial Diamonds.Vol2 1100
Global Eyelash Assessment scale (GEA) 1000
Picture Books with Same-sex Parented Families: Unintentional Censorship 550
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 4038184
求助须知:如何正确求助?哪些是违规求助? 3575908
关于积分的说明 11373872
捐赠科研通 3305715
什么是DOI,文献DOI怎么找? 1819255
邀请新用户注册赠送积分活动 892662
科研通“疑难数据库(出版商)”最低求助积分说明 815022