超声辅助酸淋洗对制革污泥Cr的浸出及形态转化影响研究

doi:10.19677/j.issn.1004-7964.2020.01.002

皮革科学与工程 ›› 2020, Vol. 30 ›› Issue (1): 7-12.doi: 10.19677/j.issn.1004-7964.2020.01.002

超声辅助酸淋洗对制革污泥Cr的浸出及形态转化影响研究

马宏瑞¹, 李晓洁², 陈丰羽¹, 朱超¹, 王晴¹, 陈湘萍¹, 黄彬¹

1.陕西科技大学环境科学与工程学院,陕西西安 710021;
2.陕西科技大学化学与化工学院,陕西西安 710021

收稿日期:2019-06-10 上线日期:2020-03-26
作者简介:马宏瑞(1963-),教授,博士生导师,研究方向为化工污染控制与资源化研究;联系电话：13991376232;E-mail：mahrxingfeng@163.com。
基金资助:
国家水体污染控制与治理科技重大专项; （2017ZX07602-001）及国家自然科学基金（51704189）

Chromium Liberation and Speciation from Tannery Sludge by Ultrasond-assisted Acid Leaching

MA Hongrui¹, LI Xiaojie², CHEN Fengyu¹, ZHU Chao¹, WANG Qing¹, CHEN Xiangping¹, HUANG Bin¹

1.School of Environmental Science and Engineering, Shaanxi University of Science & Technology, Xi'an 710021,China;
2.School of Chemistry and Chemical Engineering, Shaanxi University of Science & Technology, Xi'an 710021, China

Received:2019-06-10 Published:2020-03-26

摘要/Abstract

摘要： 针对制革含铬污泥中残渣态Cr难以通过酸淋洗达到高效回收的问题,现提出超声协同酸浸提的工艺方案高效实现污泥的无害化及Cr的回收。随着超声波处理时间的延长,对残渣态Cr的提取效率有所提高。在以0.5 mol/L硫酸为浸提剂1800 W下超声40 min,此时污泥上清液TOC值从937.5 mg/L增加至1581.4 mg/L,VSS由49.9%减少至10%。Cr的浸提率高达90.61%,残渣态Cr可减少至4.4 mg/g干泥,表明超声波作用强化了酸对残渣态Cr的提取,具有明显的协同效应。超声协同酸浸提的工艺方案为制革污泥中残渣态Cr相互包夹的复杂结构提供了一种高效、可行的破解方案。

关键词: 制革污泥, 残渣态Cr, 超声, 浸提率

Abstract: The residual Cr in tannery sludge cannot be recovered efficiently by traditional acid leaching. To resolve the problem, a process scheme of ultrasonic assisted acid leaching was proposed to realize the harmlessness of tannery sludge and the efficient recovery of Cr . The results indicated that the removal of Cr by acid leaching increased with the duration of ultrasonic treatment. Total organic carbon (TOC) raised from 937.5 mg/L to 1571.4 mg/L under the condition of 0.5 mol/L H₂SO₄, ultrasonic power of 50% (1800 W) and leaching time of 40 min, while VSS declined from 49.9% to 10%, leaching efficiency of Cr reached 90.61%, and the residual Cr could be reduced to less than 4.4 mg/g. The results verified that ultrasonication obviously intensified the efficiency of acids extraction of Cr from sludge with significant synergic effect. The ultrasonic assisted acid leaching process provides an efficient and feasible solution for the breakdown of complex structure and the release of residual Cr in the tannery sludge.

Key words: tannery sludge, residual Cr, ultrasound, leaching efficiency

中图分类号:

X794

马宏瑞, 李晓洁, 陈丰羽, 朱超, 王晴, 陈湘萍, 黄彬. 超声辅助酸淋洗对制革污泥Cr的浸出及形态转化影响研究[J]. 皮革科学与工程, 2020, 30(1): 7-12.

MA Hongrui, LI Xiaojie, CHEN Fengyu, ZHU Chao, WANG Qing, CHEN Xiangping, HUANG Bin. Chromium Liberation and Speciation from Tannery Sludge by Ultrasond-assisted Acid Leaching[J]. Leather Science and Engineering, 2020, 30(1): 7-12.

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超声辅助酸淋洗对制革污泥Cr的浸出及形态转化影响研究

Chromium Liberation and Speciation from Tannery Sludge by Ultrasond-assisted Acid Leaching

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