Multi-metal contaminant mobilizations by natural colloids and nanoparticles in paddy soils during reduction and reoxidation

胶体 化学 土壤水分 环境化学 金属 氧化还原 纳米颗粒 有机质 水溶液 粒径 氢氧化物 作文(语言) 无机化学 化学工程 地质学 土壤科学 物理化学 有机化学 哲学 工程类 语言学
作者
Xinyang Li,Zhenyu Cao,Yanpei Du,Yu Zhang,Jiajia Wang,Xingmao Ma,Pengjie Hu,Yongming Luo,Longhua Wu
出处
期刊:Journal of Hazardous Materials [Elsevier]
卷期号:461: 132684-132684 被引量:13
标识
DOI:10.1016/j.jhazmat.2023.132684
摘要

Naturally-occurring colloids and nanoparticles are crucial in transporting heavy metal contaminants in soil-water systems. However, information on particle-bound metals’ size distribution and elemental composition in paddy soils under redox-fluctuation is scarce. Here, we investigated the mobilization of Cu, Cd, and Pb-containing nanoparticles and colloids in four contaminated soils with distinctive geochemical properties during reduction and subsequent re-oxidation. Using AF4-UV-ICP-MS and STEM-EDS, we observed that particle-bound metals were primarily associated with two sizes ranges: 0.3−40 kDa (F1) and 130 kDa−450 nm (F2), which mainly consisted of organic matter (OM), iron hydroxide and clay minerals. Cu and Pb were more likely bound to colloid than Cd. Colloidal Cu, Pb and Cd accounted for averages of 83.2%, 72.4% and 19.8% of their total concentration in solution (<0.45 µm) during soil reduction, and decreased during soil re-oxidation. This proportion was also positively correlated with aqueous pH and DOC but negatively correlated with Eh. Further quantitative analysis demonstrated that Cu/Cd positively correlated with OM at nanometric scale (F1). This study provides quantitative insights into the size, composition and abundance of polymetallic pollutant-carrying particles in paddy soils during redox fluctuation, and highlights the importance of nanometric interactions between OM and toxic cationic metals for their release.
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
刚刚
刚刚
1秒前
顺利小陈完成签到,获得积分10
3秒前
tingting发布了新的文献求助10
3秒前
3秒前
4秒前
苏卿应助LiHuiwang采纳,获得10
5秒前
唯心如意完成签到,获得积分10
6秒前
yufeng发布了新的文献求助10
6秒前
网易邮箱发布了新的文献求助10
7秒前
顺利小陈发布了新的文献求助10
8秒前
佳小佳完成签到,获得积分10
8秒前
落寞代亦完成签到,获得积分10
9秒前
10秒前
哈哈哈哈完成签到,获得积分10
11秒前
佳小佳发布了新的文献求助30
12秒前
12秒前
彭于晏应助半分青蓝采纳,获得10
12秒前
橘子石榴完成签到 ,获得积分10
12秒前
今后应助echo采纳,获得10
14秒前
chriswtr发布了新的文献求助50
16秒前
斑点发布了新的文献求助10
17秒前
木樨完成签到,获得积分10
21秒前
务实的乌冬面完成签到,获得积分20
23秒前
dbq完成签到 ,获得积分10
23秒前
25秒前
Junlei完成签到,获得积分10
25秒前
26秒前
CodeCraft应助parpate采纳,获得10
26秒前
chriswtr完成签到,获得积分10
27秒前
28秒前
28秒前
粥小周发布了新的文献求助10
29秒前
30秒前
领导范儿应助羊青丝采纳,获得10
31秒前
无聊完成签到,获得积分10
31秒前
碧蓝帅哥发布了新的文献求助10
31秒前
一木发布了新的文献求助20
32秒前
今后应助无Wen3采纳,获得10
34秒前
高分求助中
Continuum Thermodynamics and Material Modelling 3000
Production Logging: Theoretical and Interpretive Elements 2700
Les Mantodea de Guyane Insecta, Polyneoptera 1000
Structural Load Modelling and Combination for Performance and Safety Evaluation 1000
Conference Record, IAS Annual Meeting 1977 820
England and the Discovery of America, 1481-1620 600
電気学会論文誌D(産業応用部門誌), 141 巻, 11 号 510
热门求助领域 (近24小时)
化学 材料科学 生物 医学 工程类 有机化学 生物化学 物理 纳米技术 计算机科学 内科学 化学工程 复合材料 基因 遗传学 物理化学 催化作用 量子力学 光电子学 冶金
热门帖子
关注 科研通微信公众号,转发送积分 3572296
求助须知:如何正确求助?哪些是违规求助? 3142501
关于积分的说明 9448015
捐赠科研通 2843973
什么是DOI,文献DOI怎么找? 1563103
邀请新用户注册赠送积分活动 731630
科研通“疑难数据库(出版商)”最低求助积分说明 718640