亲爱的研友该休息了!由于当前在线用户较少,发布求助请尽量完整地填写文献信息,科研通机器人24小时在线,伴您度过漫漫科研夜!身体可是革命的本钱,早点休息,好梦!

A novel green synthesis of MnO2-Coal composite for rapid removal of silver and lead from wastewater

吸附 弗伦德利希方程 朗缪尔 离子强度 水溶液 朗缪尔吸附模型 化学 废水 环境修复 核化学 打赌理论 化学工程 环境工程 污染 有机化学 环境科学 生态学 生物 工程类
作者
Naseem Abbas,Syed M. Husnain,Umar Asim,Faisal Shahzad,Yawar Abbas
出处
期刊:Water Research [Elsevier BV]
卷期号:256: 121526-121526 被引量:7
标识
DOI:10.1016/j.watres.2024.121526
摘要

The presence of Ag(I) and Pb(II) ions in wastewater poses a significant threat to human health in contemporary times. This study aims to explore the development of a novel and economical adsorbent by grafting MnO2 particles onto low-rank coal, providing an innovative solution for the remediation of water contaminated with silver and lead. The synthesized nanocomposites, referred to as MnO2-coal, underwent thorough characterization using FTIR, XRD, BET, SEM, and TEM to highlight the feasibility of in-situ surface modification of coal with MnO2 nanoparticles. The adsorption of Ag(I) and Pb(II) from their respective aqueous solution onto MnO2-coal was systematically investigated, with optimization of key parameters such as pH, temperature, initial concentration, contact time, ionic strength, and competing ions. Remarkably adsorption equilibrium was achieved within a 10 minutes, resulting in impressive removal rates of 80-90 % for both Ag(I) and Pb(II) at pH 6. The experimental data were evaluated using Langmuir, Freundlich, and Temkin isotherm models. The Langmuir isotherm model proved to be more accurate in representing the adsorption of Ag(I) and Pb(II) ions onto MnO2-coal, exhibiting high regression coefficients (R2 = 0.99) and maximum adsorption capacities of 93.57 and 61.98 mg/g, along with partition coefficients of 4.53 and 71.92 L/g for Ag(I) and Pb(II), respectively, at 293 K. Kinetic assessments employing PFO, PSO, Elovich, and IPD models indicated that the PFO and PSO models were most suitable for adsorption mechanism of Pb(II) and Ag(I) on MnO2-coal composites, respectively. Moreover, thermodynamic evaluation revealed the spontaneous and endothermic adsorption process for Ag(I), while exothermic behavior for adsorption of Pb(II). Importantly, this approach not only demonstrates cost-effectiveness but also environmental friendliness in treating heavy metal-contamination in water. The research suggests the potential of MnO2-coal composites as efficient and sustainable adsorbents for water purification applications.
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
团团完成签到 ,获得积分10
2秒前
Jasper应助linkman采纳,获得10
4秒前
天天快乐应助linkman采纳,获得30
13秒前
黙宇循光完成签到 ,获得积分10
15秒前
追三完成签到 ,获得积分10
17秒前
温暖笑容发布了新的文献求助10
26秒前
32秒前
温暖笑容完成签到,获得积分10
38秒前
wackykao完成签到 ,获得积分10
38秒前
汉堡包应助linkman采纳,获得30
39秒前
41秒前
42秒前
CC完成签到,获得积分10
43秒前
CC发布了新的文献求助10
45秒前
hilton完成签到,获得积分10
50秒前
xiaoya完成签到,获得积分20
51秒前
善学以致用应助CC采纳,获得10
51秒前
54秒前
xiaojia0501完成签到,获得积分10
55秒前
xiaojia0501发布了新的文献求助10
1分钟前
脑洞疼应助松松果采纳,获得10
1分钟前
健壮的花瓣完成签到 ,获得积分10
1分钟前
1分钟前
手打鱼丸完成签到 ,获得积分10
1分钟前
打打应助linkman采纳,获得10
1分钟前
HMR完成签到 ,获得积分10
1分钟前
自由的无色完成签到 ,获得积分10
1分钟前
1分钟前
sarah完成签到,获得积分10
1分钟前
所所应助科研通管家采纳,获得10
1分钟前
科研通AI2S应助科研通管家采纳,获得10
1分钟前
大大大应助科研通管家采纳,获得10
1分钟前
喂喂发布了新的文献求助10
1分钟前
1分钟前
Hello应助linkman采纳,获得10
1分钟前
松松果发布了新的文献求助10
1分钟前
1分钟前
wmj完成签到,获得积分20
1分钟前
轻松的惜芹给沉静安荷的求助进行了留言
1分钟前
1分钟前
高分求助中
The Mother of All Tableaux: Order, Equivalence, and Geometry in the Large-scale Structure of Optimality Theory 3000
A new approach to the extrapolation of accelerated life test data 1000
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
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 3990012
求助须知:如何正确求助?哪些是违规求助? 3532049
关于积分的说明 11256153
捐赠科研通 3270925
什么是DOI,文献DOI怎么找? 1805123
邀请新用户注册赠送积分活动 882270
科研通“疑难数据库(出版商)”最低求助积分说明 809216