ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2025
·
IF 0
Liu Pengxiao,Gao Shuai,Li Ying,Hou Bin,Liu Ning,Du Zhen,Lu Jing
This study investigated the aging and pollution behavior of acrylonitrile butadiene styrene (ABS) and polycarbonate (PC) microplastics (MPs) exposed to residual chlorine in tap water distribution systems. The ABS and PC MPs in the aging processes were analyzed using scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). Results revealed that 0.4 mg/L residual chlorine could induce morphological changes, increase surface oxygen-containing functional groups, and enhance the hydrophilicity of MPs at the CT value of 9216 mg·min/L. Additionally, both ABS and PC MPs released dissolved organic matter (DOM) into water, with higher DOM concentrations observed in the presence of residual chlorine. Besides, this interaction also led to the formation of trichloromethane (TCM). And the TCM production increased with higher MPs concentrations, smaller particle size, and longer chlorine exposure time.
研究领域:
环境科学
·
污染生态学
✓ 已验证
产品关联
DOI
PubMed
SCIENCE OF THE TOTAL ENVIRONMENT
·
2022
·
IF 10.753
Shijun Zhu,Huiming Zheng,Huihong Sun,Junping Liu,Xiaoyan Ma,Xueyan Li,Qingsong Li,Andrea M. Dietrich
Based on a one-year field investigation of disinfection by-products (DBPs) in large scale water distribution system (LSWDS), the various characteristics of DBPs together with their correlation with booster chlorination were elaborated through ArcGIS model. Furthermore, the effects of booster chlorination on DBP formation were investigated through simulated experiments. Residual chlorine showed a strong relationship with occurrence of different DBPs in LSWDS, and the yield of DBPs increased significantly after booster chlorination. The simulated chlorination experiments showed that diminution of the ratio of primary to secondary (booster) chlorination dosage, and delaying the secondary chlorine addition reduced the generation of DBPs during water conveyance. The yield concentrations of THMs and HAAs obviously increased after booster chlorination. The correlation between HAAs and chlorine dosage is weaker in the field research than in the simulation experiment while THMs had a positive correlation with the chlorine addition in both field research and simulation experiment.
研究领域:
环境科学
·
公共卫生
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2015
·
IF 2.729
Xiao-Hui Dai,Juan Zhang,Xin-Jing Pang,Jun-Ping Zhou,Guang-Zhou Liu,Shu-Yong Zhang
In-situ electrolytic generation of chlorine is commercially adopted as an economic and effective method for treating ballast water (BW). An in-situ and rapid method for detecting total residual chlorine (TRC) is necessary for automatic control on the electrolysis. A polymer-coated electrode fabricated by coating a glassy carbon (GC) electrode with a polyvinyl chloride (PVC) coating that contains zephiran chloride (ZephCl) was prepared in this study. This all-solid ion-selective sensor was used to detect TRC in the simulated electrolytically treated BW. Results showed that adding ferrocene (Fc) in the PVC coating could significantly improve the response speed, reproducibility and stability of the electrode. The potential of the Fc–PVC–ZephCl–GC electrode was linearly proportional to the logarithm of TRC within the range of 1 mg/L to 20 mg/L. The interference of the dissolved oxygen and the possible co-existing ions in seawater was also evaluated without evident interference found. The response mechanism of the electrode, the enhancement of Fc and the failure mechanism of the electrode were discussed. The Fc–PVC–ZephCl–GC electrode could be used as a suitable sensor for the in-situ monitoring of TRC in the electrolytic treatment of BW.
研究领域:
环境科学
·
分析化学
✓ 已验证
DOI
高影响因子
SENSORS
·
2021
·Vol. 21
·期 2
·350
·
IF 3.576
Yaning Zhang,Zhihui Li,Xiaotong Guo,Guangzhou Liu,Shuyong Zhang
A new potentiometric sensor based on modified carbon paste electrode (CPE) was prepared for the sensitive and selective detection of total residual chlorine (TRC) in simulated electrolytically-treated ballast water (BW). The modified CPE was prepared using ferrocene (Fc) as the sensing species and paraffin oil as the binder. It is revealed that the addition of Fc can significantly shorten the response time and improve the reproducibility, selectivity, and stability of the sensor. The open circuit potential of the Fc-CPE is in linear proportion to the logarithm of TRC within the TRC concentration range from 1 mg∙dm−3to 15 mg∙dm−3. In addition, the Fc-CPE sensor exhibits good selectivity to TRC over a wide concentration range of the possible co-exiting interference ions in seawater. The Fc-CPE electrode can be used as a convenient and reliable sensor for the continuous monitoring of TRC during the electrolytic treatment of BW.Keywords:ballast water;electrolytic treatment;carbon paste electrode;total residual chlorine;potentiometric sensor
研究领域:
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Catalysis
·
2019
·
IF 12.221
Muhong Li,Feifei Bi,Yida Xu,Panpan Hao,Kun Xiang,Yu Zhang,Shanyong Chen,Jia Guo,Xuefeng Guo,Weiping Ding
An oxide catalyst plays an important role in environmental catalysis. Metal chlorides are widely used as precursors in the preparation of oxide catalysts. However, residual chlorine usually influences the performance of catalysts. In this work, we systematically investigate the influence and efficient removal of chlorine residue on the Co3O4 catalyst in CO oxidation by control experiments and related characterizations. Compared to the cobalt nitrate-derived catalyst, the cobalt chloride-derived Co3O4 catalyst shows a significant improvement in catalytic activity after being washed with water, suggesting that residual chlorine exerts a detrimental effect on the Co3O4 catalyst in CO oxidation. Further investigations show that residual chlorine inhibits the activity of surface oxygen species as well as blocks the active sites. It is noteworthy that residual chlorine cannot be efficiently removed before the calcination because of the strong interactions between the chloride anions and cobalt precursor. In addition, the washed chloride-derived catalyst even shows a better catalytic performance than the nitrate-derived one because of more active sites that are exposed on the surface with the removal of residual chlorine. More importantly, most of the commercial Co3O4 samples are found to be seriously poisoned by chlorine. Hence, efficient elimination of residual chlorine is very important and should be undertaken before the use of catalysts in the case of using chlorides as precursors.
研究领域:
环境催化
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）