Iron-crosslinked alginate derived Fe/C composites for atrazine removal from water

热解 吸附 化学 碳纤维 零价铁 朗缪尔吸附模型 降级(电信) 核化学 动力学 复合数 相(物质) 化学工程 材料科学 复合材料 有机化学 电信 物理 工程类 量子力学 计算机科学
作者
Lei Cheng,Yan Song,Fanxu Meng,Yuqing Sun,Daniel C.W. Tsang,Kun Yang,Daohui Lin
出处
期刊:Science of The Total Environment [Elsevier]
卷期号:756: 143866-143866 被引量:21
标识
DOI:10.1016/j.scitotenv.2020.143866
摘要

Fe/C composite is emerging as a promising nanoscale zero-valent iron (nZVI) based material for wastewater treatment to counteract the limitations of nZVI, while its preparation method, structure-activity relationship, and working mechanisms and conditions still need to be studied. In this study, Fe/C composites derived from iron-crosslinked alginate was successfully achieved via high temperature pyrolysis. Ferric ions were only transformed into Fe3O4/γ-Fe2O3 at low pyrolysis temperature (≤500 °C), whereas Fe0/Fe3C became the primary Fe species with the formation of graphitic carbon at elevated pyrolysis temperature (≥700 °C). Fe/C composites from higher pyrolysis temperature presented better performance in atrazine (ATZ) removal, and the optimal pyrolysis temperature was 800 °C (Fe/C-800). Batch experiments showed that the removal kinetics of ATZ (10 mg L−1) by Fe/C-800 (0.2 g L−1) followed pseudo-second-order model, and 24-h ATZ removal efficiency maintained at 93.5 ± 1.0% within pH 3–9. The adsorption by the graphitic carbon phase of Fe/C-800 was the principal contributor to the pH-independent superior performance in ATZ removal, and the Langmuir model fitted adsorption capacity was 64.8 mg g−1 at pH 6. Although the carbon-phase adsorbed ATZ was basically unavailable for degradation, Fe0/Fe3C-mediated ATZ degradation contributed to the great reactivity of Fe/C-800 at pH 3. Fe0/Fe3C in Fe/C-800 was more efficient for ATZ degradation than commercial nZVI, and oxidative dealkylation by Fe0/Fe3C mediated Fenton reaction was the predominant ATZ degradation pathway rather than reductive dechlorination. Moreover, the produced ATZ degradation intermediates could be further adsorbed by Fe/C-800, mitigating potential secondary pollution. Thus, iron-crosslinked alginate derived Fe/C composites can be an excellent alternative for nZVI in organics-polluted water treatment with great reactivity and wide pH applicability.
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
大幅提高文件上传限制,最高150M (2024-4-1)

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
项惋清发布了新的文献求助10
2秒前
limao完成签到 ,获得积分10
16秒前
一只橘子完成签到 ,获得积分10
17秒前
CC完成签到 ,获得积分10
21秒前
bing完成签到 ,获得积分10
22秒前
小学徒完成签到 ,获得积分10
23秒前
FashionBoy应助小绵羊采纳,获得10
24秒前
24秒前
Micheal完成签到,获得积分10
27秒前
初七完成签到 ,获得积分10
27秒前
28秒前
啦啦啦发布了新的文献求助10
29秒前
小丸子完成签到,获得积分10
30秒前
酷波er应助小绵羊采纳,获得10
31秒前
swing发布了新的文献求助10
32秒前
laozhao完成签到,获得积分10
36秒前
swing完成签到,获得积分10
37秒前
呆萌的瑾瑜完成签到 ,获得积分10
37秒前
高兴的小完成签到,获得积分10
37秒前
Lylex完成签到,获得积分10
43秒前
huco完成签到,获得积分10
43秒前
壮观的晓露完成签到,获得积分10
45秒前
研友_Z6k7B8完成签到 ,获得积分10
45秒前
yuan完成签到,获得积分10
45秒前
光之战士完成签到 ,获得积分10
45秒前
隐形曼青应助科研通管家采纳,获得10
46秒前
星辰大海应助科研通管家采纳,获得10
46秒前
欣欣丽丽完成签到 ,获得积分0
48秒前
TTDY完成签到 ,获得积分10
49秒前
dms完成签到,获得积分10
1分钟前
我是老大应助chshqin2采纳,获得10
1分钟前
陌子完成签到 ,获得积分10
1分钟前
科研三井泽完成签到,获得积分10
1分钟前
神经娃完成签到,获得积分10
1分钟前
求助完成签到,获得积分10
1分钟前
1分钟前
chshqin2发布了新的文献求助10
1分钟前
1分钟前
xin应助风雪雅尘采纳,获得10
1分钟前
Chikit完成签到,获得积分10
1分钟前
高分求助中
Un calendrier babylonien des travaux, des signes et des mois: Séries iqqur îpuš 1036
Sustainable Land Management: Strategies to Cope with the Marginalisation of Agriculture 1000
Corrosion and Oxygen Control 600
Python Programming for Linguistics and Digital Humanities: Applications for Text-Focused Fields 500
Heterocyclic Stilbene and Bibenzyl Derivatives in Liverworts: Distribution, Structures, Total Synthesis and Biological Activity 500
重庆市新能源汽车产业大数据招商指南(两链两图两池两库两平台两清单两报告) 400
Division and square root. Digit-recurrence algorithms and implementations 400
热门求助领域 (近24小时)
化学 材料科学 医学 生物 有机化学 工程类 生物化学 纳米技术 物理 内科学 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 电极 光电子学 量子力学
热门帖子
关注 科研通微信公众号,转发送积分 2546297
求助须知:如何正确求助?哪些是违规求助? 2175702
关于积分的说明 5600550
捐赠科研通 1896461
什么是DOI,文献DOI怎么找? 946308
版权声明 565379
科研通“疑难数据库(出版商)”最低求助积分说明 503557