含铬革屑生物炭活化过硫酸盐降解亚甲基蓝

doi:10.19677/j.issn.1004-7964.2023.04.001

皮革科学与工程 ›› 2023, Vol. 33 ›› Issue (4): 1-6.doi: 10.19677/j.issn.1004-7964.2023.04.001

• 试验研究 • 下一篇

含铬革屑生物炭活化过硫酸盐降解亚甲基蓝

唐余玲¹, 郭丽君¹, 周建飞¹, 石碧^1,2,*

1.四川大学制革清洁技术国家工程实验室,四川成都 610065;
2.四川大学皮革化学与工程教育部重点实验室,四川成都 610065

收稿日期:2022-12-16 出版日期:2023-08-01 上线日期:2023-07-21
通讯作者: *石碧(1958-),男,博士,教授,主要从事制革化学、制革清洁技术、皮胶原转化利用研究。E-mail:shibi@scu.edu.cn。
作者简介:唐余玲（1990-）,女,博士,副研究员,主要研究方向：污水处理与资源化。E-mail:tangyuling@scu.edu.cn。
基金资助:
国家重点研发计划（2019YFC1904501）

Persulfate Activation by Chrome Shavings Derived Biochar for Methylene Blue Degradation

TANG Yuling¹, GUO Lijun¹, ZHOU Jianfei¹, SHI Bi^1,2,*

1. National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu 610065, China;
2. Key Laboratory of Leather Chemistry and Engineering of Ministry of Education, Sichuan University, Chengdu 610065, China

Received:2022-12-16 Online:2023-08-01 Published:2023-07-21

摘要/Abstract

摘要： 以制革固体废弃物含铬革屑为原料,在高温限氧条件下制备得到了含铬革屑生物炭（Cr₂O₃-BC）,并探究了其活化过硫酸盐（PS）降解水中亚甲基蓝（MB）的性能。结果表明,在Cr₂O₃-BC的质量浓度为0.03 g/L、PS的浓度为10 mmol/L的条件下,Cr₂O₃-BC/PS体系对MB的去除率和矿化率可在30 min内分别达到99.9%和92.1%。在Cl^-、NO₃^-、HCO₃^-和腐殖酸的干扰下,体系中MB的去除率仍维持在80%以上。此外,循环实验进行6次后,Cr₂O₃-BC/PS体系对MB的去除率仍高达84.6%。淬灭实验表明,Cr₂O₃-BC/PS体系中产生的SO₄^·-和·OH均参与降解MB,且SO₄^·-起主导作用。该研究不仅为含铬革屑的高值化利用提供了新的思路,而且开发了一种可以去除废水中MB的高效PS催化剂,实现了以废治废的循环经济理念。

关键词: 含铬革屑, 生物炭, 过硫酸盐, 亚甲基蓝

Abstract: Chrome shavings were used as raw materials to prepare the Cr-containing biochar (Cr₂O₃-BC) via a pyrolysis process under the nitrogen atmosphere, and its performance for persulfate (PS) activation was studied using methylene blue (MB) as the model pollutant. Results illustrated that high removal rate (99.9%) and high mineralization efficiency (92.1%) of MB could be achieved within 30 min with PS concentration of 10 mmol/L and Cr₂O₃-BC dosage of 0.03 g/L. Besides, the coexisting substances (e.g. Cl^-, NO₃^-, HCO₃^- and humic acid) played a little effect on the MB removal, and more than 80% of MB still could be degraded in the Cr₂O₃-BC/PS system. In addition, the MB removal rate still reached 84.6% after six cycles of Cr₂O₃-BC/PS. Quenching experimental results indicated that both SO₄^·- and ·OH were responsible for the MB removal in the Cr₂O₃-BC/PS system, but SO₄^·- played the dominant role. Hence, this work not only provided a feasible strategy for the high-value use of chrome shavings, but also developed an efficient catalyst for PS activation to remove MB, which is in line with the concept of circular economy.

Key words: chrome shavings, biochar, persulfate, methylene blue

中图分类号:

X794

唐余玲, 郭丽君, 周建飞, 石碧. 含铬革屑生物炭活化过硫酸盐降解亚甲基蓝[J]. 皮革科学与工程, 2023, 33(4): 1-6.

TANG Yuling, GUO Lijun, ZHOU Jianfei, SHI Bi. Persulfate Activation by Chrome Shavings Derived Biochar for Methylene Blue Degradation[J]. Leather Science and Engineering, 2023, 33(4): 1-6.

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含铬革屑生物炭活化过硫酸盐降解亚甲基蓝

Persulfate Activation by Chrome Shavings Derived Biochar for Methylene Blue Degradation

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