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
yue完成签到,获得积分10
2秒前
淼队完成签到,获得积分10
3秒前
3秒前
落叶解三秋完成签到,获得积分10
4秒前
Crystal完成签到 ,获得积分10
7秒前
小小酥完成签到,获得积分10
7秒前
等待蚂蚁完成签到 ,获得积分10
8秒前
zgt01发布了新的文献求助10
8秒前
心心完成签到 ,获得积分10
9秒前
123完成签到,获得积分10
10秒前
温超完成签到,获得积分10
10秒前
量子星尘发布了新的文献求助10
10秒前
11秒前
12秒前
Menta1y完成签到,获得积分10
12秒前
czzlancer完成签到,获得积分10
13秒前
汶溢完成签到,获得积分10
13秒前
xsss完成签到,获得积分10
14秒前
TAN完成签到,获得积分10
14秒前
通通通发布了新的文献求助10
15秒前
liudw完成签到,获得积分10
15秒前
丹丹子完成签到 ,获得积分10
16秒前
时光完成签到,获得积分10
16秒前
17秒前
充电宝应助vsvsgo采纳,获得10
19秒前
123完成签到 ,获得积分10
21秒前
Ammr完成签到 ,获得积分10
21秒前
无限的依波完成签到,获得积分10
21秒前
姽婳wy发布了新的文献求助10
22秒前
lemon完成签到,获得积分10
22秒前
传奇3应助duckspy采纳,获得30
23秒前
陈木木完成签到,获得积分10
24秒前
可可西里完成签到,获得积分10
25秒前
奋斗蜗牛完成签到,获得积分10
25秒前
CipherSage应助眼睛大的擎苍采纳,获得10
25秒前
打打应助小小酥采纳,获得10
26秒前
fox完成签到 ,获得积分10
26秒前
僦是卜够完成签到 ,获得积分10
27秒前
小马甲应助嘉梦采纳,获得10
30秒前
qiqi完成签到,获得积分10
31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 4038235
求助须知:如何正确求助?哪些是违规求助? 3575992
关于积分的说明 11374009
捐赠科研通 3305760
什么是DOI,文献DOI怎么找? 1819276
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