本文二维码信息
二维码（扫一下试试看！）
Acute Toxicity Evaluation of Wastewater from ECF Bleaching Bamboo Pulp and the Toxic Organic Chloride Degradation by Electrochemical Oxidization
Received:May 09, 2023  
DOI：10.11980/j.issn.0254-508X.2023.10.012
Key Words:element chlorine free bleaching  absorbable organic halogen  electrochemical oxidation  toxicity evaluation  bamboo pulp
Fund Project:陕西省重点研发计划项目（项目编号：2020SF-406）。
Author NameAffiliationPostcode
JING Liming* College of Environmental Science and Engineering， Shannxi University of Science & Technology，Xi’an， Shaanxi Province， 710021
China Light Industry Water Pollution Control Engineering Center， Xi’an， Shaanxi Province， 726300 		726300
LIU Shuang College of Environmental Science and Engineering， Shannxi University of Science & Technology，Xi’an， Shaanxi Province， 710021 710021
AI Shuang College of Environmental Science and Engineering， Shannxi University of Science & Technology，Xi’an， Shaanxi Province， 710021 710021
DANG Yidi College of Environmental Science and Engineering， Shannxi University of Science & Technology，Xi’an， Shaanxi Province， 710021
Water Conservancy Bureau of Shangnan County， Shangluo， Shaanxi Province， 726399 		726399
MA Lan College of Environmental Science and Engineering， Shannxi University of Science & Technology，Xi’an， Shaanxi Province， 710021
Xinjiang Municipa Research Institute of Environmental Protection， Urumqi， Xinjiang Uygur Autonomous Region， 830000 		830000
Hits: 1305
Download times: 1020
Abstract:In this study， the pollutant characteristics from element chlorine free （ECF） bleaching bamboo pulp were analyzed， the acute toxicity of the wastewater was comprehensively evaluated， and the degradation of toxic organic chloride in wastewater was also discussed by Ti/IrO2-RuO2 coating electrode. Wastewater characteristic analysis showed that the pollutants were mainly generated in D0 stage of ECF bleaching process， contributing chemical oxygen demand （COD） and absorbable organic halogen （AOX） 71.8% and 73.4% respectively， and its acute toxicity （EC50 of 27.7%） was slightly more than Eop wastewater （EC50 of 44.4%）， but both of which were in the moderate toxicity grade ， organic chlorides played more tribute to wastewater’s toxicity. The results showed the pollution load of wastewater from ECF bleaching bamboo pulp was greatly decreased with Ti/IrO2-RuO2 coating electrode oxidization. With the conditions of voltage 7.0 V and the electrolysis time 240 min， the CODCr removal rate of wastewater from D0 stage， Eop stage and the mixed wastewater of D0 and Eop were 57.7%， 37.5% and 43.5%， the decolored rate were 90.2%， 82.3% and 83.1% respectively. And better toxic organic chloride （AOX） degradation efficiencies were 66.3% ，70.2% and 100% respectively， the toxicity grade reached low toxicity from moderate toxicity， and the Eop wastewater indicated non-toxic level.
View Full Text  HTML  View/Add Comment  Download reader