清晨好,您是今天最早来到科研通的研友!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,伴您科研之路漫漫前行!

Amino-modified hemp stem for high-capacity adsorption of Cr(VI) from aqueous solution

吸附 化学 水溶液 化学工程 有机化学 工程类
作者
Wentao Huang,Yuping Xu,Niansheng Chen,Guoe Cheng,Hanzhong Ke
出处
期刊:Journal of environmental chemical engineering [Elsevier BV]
卷期号:11 (6): 111441-111441 被引量:6
标识
DOI:10.1016/j.jece.2023.111441
摘要

Two novel adsorbents, triethylenetetramine-grafted hemp stems (HS-TETA) and choline chloride-grafted hemp stems (HS-CL), were prepared by using epichlorohydrin as etherifying agent. The obtained adsorbents were comprehensively characterized, and the adsorption capacity for hexavalent chromium (Cr(VI)) was evaluated under various single-factor conditions, including adsorbent dosage, contact time, solution pH, initial hexavalent chromium concentration, and temperature. HS-TETA and HS-CL exhibit excellent adsorption performance, with maximum adsorption capacities of 396.88 and 335.04 mg/g, respectively, outperforming previous relevant studies. The adsorption behavior of Cr(VI) by HS-TETA and HS-CL was investigated using adsorption kinetics, adsorption isotherms, and adsorption thermodynamics. The adsorption process follows the pseudo-second-order kinetic model and the Langmuir isotherm model, suggesting a monolayer adsorption process with chemical adsorption. Thermodynamic analysis reveals that the adsorption of Cr(VI) on two adsorbents is spontaneous and exothermic. Combined with the characterization, it can be speculated that the adsorption of Cr(VI) on two adsorbents involves electrostatic effects, reduction, and complexation processes. HS-TETA and HS-CL exhibit good recyclability. After 5 cycles, HS-TETA and HS-CL maintain over 50% and 85% of their initial adsorption capacity, respectively. The cycling performance of HS-CL containing quaternary ammonium and amine groups is significantly superior to that of HS-TETA containing only an amine group, indicating that the introduction of the quaternary ammonium group enhances the cycling performance of the adsorbent. HS-TETA and HS-CL, as cost-effective and efficient adsorbents, offer a promising solution for the treatment of Cr(VI)-contaminated wastewater and facilitate the recycling of agricultural waste.
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
Dr.Tang完成签到 ,获得积分10
9秒前
18秒前
Siren发布了新的文献求助30
22秒前
披着羊皮的狼完成签到 ,获得积分10
56秒前
57秒前
sci完成签到 ,获得积分10
59秒前
1分钟前
酷波er应助科研通管家采纳,获得10
1分钟前
Ava应助科研通管家采纳,获得10
1分钟前
yindi1991完成签到 ,获得积分10
1分钟前
1分钟前
科研通AI5应助Siren采纳,获得10
1分钟前
1分钟前
Siren发布了新的文献求助10
1分钟前
ding应助瑁柏采纳,获得10
1分钟前
瑁柏完成签到,获得积分10
1分钟前
1分钟前
1分钟前
瑁柏发布了新的文献求助10
1分钟前
Siren发布了新的文献求助10
2分钟前
2分钟前
Ggap1发布了新的文献求助10
2分钟前
Ggap1完成签到,获得积分10
3分钟前
思源应助Siren采纳,获得10
3分钟前
Raul完成签到 ,获得积分10
3分钟前
Akim应助科研通管家采纳,获得10
3分钟前
Hello应助科研通管家采纳,获得10
3分钟前
3分钟前
3分钟前
Siren发布了新的文献求助10
3分钟前
Xu完成签到,获得积分20
3分钟前
荣浩宇完成签到 ,获得积分10
3分钟前
3分钟前
科研通AI5应助和谐乌龟采纳,获得10
4分钟前
4分钟前
4分钟前
mo发布了新的文献求助10
4分钟前
4分钟前
雪山飞龙完成签到,获得积分10
4分钟前
4分钟前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
Cognitive Neuroscience: The Biology of the Mind 1000
Technical Brochure TB 814: LPIT applications in HV gas insulated switchgear 1000
Immigrant Incorporation in East Asian Democracies 600
Nucleophilic substitution in azasydnone-modified dinitroanisoles 500
不知道标题是什么 500
A Preliminary Study on Correlation Between Independent Components of Facial Thermal Images and Subjective Assessment of Chronic Stress 500
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 3968504
求助须知:如何正确求助?哪些是违规求助? 3513331
关于积分的说明 11167297
捐赠科研通 3248697
什么是DOI,文献DOI怎么找? 1794417
邀请新用户注册赠送积分活动 875030
科研通“疑难数据库(出版商)”最低求助积分说明 804664