Probing the intermolecular interaction mechanisms between humic acid and different substrates with implications for its adsorption and removal in water treatment

化学 吸附 腐植酸 疏水效应 DLVO理论 相互作用能 单层 粘附 氢键 化学工程 水溶液 分子间力 静电学 静电相互作用 分子 有机化学 化学物理 物理化学 胶体 肥料 生物化学 工程类
作者
Lei Xie,Qiuyi Lu,Xiaohui Mao,Jingyi Wang,Linbo Han,Junqing Hu,Qingye Lu,Yixiang Wang,Hongbo Zeng
出处
期刊:Water Research [Elsevier BV]
卷期号:176: 115766-115766 被引量:60
标识
DOI:10.1016/j.watres.2020.115766
摘要

Humic substance is a ubiquitous class of natural organic matter (NOM) in soil and aquatic ecosystems, which severely affects the terrestrial and aquatic environments as well as water-based engineering systems by adsorption on solids (e.g., soil minerals, nanoparticles, membranes) via different interaction mechanisms. Herein, the chemical force microscopy (CFM) technique was employed to quantitatively probe the intermolecular forces of humic acid (HA, a representative humic substance) interacting with self-assembled monolayers (SAMs, i.e., OH-SAMs, CH3-SAMs, NH2-SAMs and COOH-SAMs) in various aqueous environments at the nanoscale. The interaction forces measured during approach could be well fitted by the extended Derjaguin-Landau-Verwey-Overbeek (DLVO) theory by incorporating the hydrophobic interaction. The average adhesion energy followed the trend as: NH2-SAMs (∼3.11 mJ/m2) > CH3-SAMs (∼2.03 mJ/m2) > OH-SAMs (∼1.38 mJ/m2) > COOH-SAMs (∼0.52 mJ/m2) in 100 mM NaCl at pH 5.8, indicating the significant role of electrostatic attraction in contributing to the HA adhesion, followed by hydrophobic interaction and hydrogen bonding. The adhesion energy was found to be dependent on NaCl concentration, Ca2+ addition and pH. For the interaction between NH2-SAMs and HA, their electrostatic attraction at pH 5.8 turned to repulsion under alkaline condition which led to the sudden drop of adhesion energy. Such results promised the adsorption and release of HA using the recyclable magnetic Fe3O4 nanoparticles coated with (3-aminopropyl)tiethoxysilane (APTES). This work provides quantitative information on the molecular interaction mechanism underlying the adsorption of HA on solids of varying surface chemistry at the nanoscale, with useful implications for developing effective chemical additives to remove HA in water treatment and many other engineering processes.
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
kk发布了新的文献求助20
1秒前
1秒前
ED应助小科采纳,获得10
2秒前
4秒前
汉堡包应助社科狗采纳,获得10
5秒前
shi发布了新的文献求助10
5秒前
清水胖子发布了新的文献求助10
5秒前
英俊雪瑶发布了新的文献求助10
5秒前
MOMO完成签到,获得积分10
6秒前
kik发布了新的文献求助10
6秒前
温暖的皮皮虾完成签到,获得积分10
7秒前
7秒前
8秒前
vikoel完成签到,获得积分10
8秒前
稳重的玫瑰完成签到,获得积分20
8秒前
lily发布了新的文献求助10
9秒前
9秒前
Ing发布了新的文献求助10
9秒前
9秒前
123完成签到,获得积分10
10秒前
123456发布了新的文献求助10
10秒前
英姑应助sup采纳,获得10
10秒前
evan完成签到 ,获得积分10
11秒前
wjx发布了新的文献求助10
11秒前
sdl发布了新的文献求助10
11秒前
12秒前
13秒前
lewe发布了新的文献求助10
13秒前
香蕉觅云应助Awojiuzheyang采纳,获得10
13秒前
13秒前
爆米花应助辛勤夜柳采纳,获得10
13秒前
陈茜应助西西采纳,获得10
14秒前
14秒前
情怀应助axn采纳,获得10
15秒前
淡水痕发布了新的文献求助10
15秒前
hunbaekkkkk发布了新的文献求助10
15秒前
踏实万天发布了新的文献求助10
16秒前
goth发布了新的文献求助10
16秒前
slx完成签到,获得积分10
16秒前
17秒前
高分求助中
Picture Books with Same-sex Parented Families: Unintentional Censorship 700
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Nucleophilic substitution in azasydnone-modified dinitroanisoles 500
不知道标题是什么 500
Indomethacinのヒトにおける経皮吸収 400
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
Effective Learning and Mental Wellbeing 300
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 3974844
求助须知:如何正确求助?哪些是违规求助? 3519270
关于积分的说明 11197844
捐赠科研通 3255496
什么是DOI,文献DOI怎么找? 1797791
邀请新用户注册赠送积分活动 877187
科研通“疑难数据库(出版商)”最低求助积分说明 806202