Article
Engineering, Environmental
Ali Shan, Ayesha Idrees, Waqas Qamar Zaman, Zain Abbas, Meesam Ali, Muhammad Saif Ur Rehman, Sabir Hussain, Muhammad Danish, Xiaogang Gu, Shuguang Lyu
Summary: The study shows that the nZVI-Ni@BC composite material performs well in activating PS to degrade chlorinated contaminants in water, achieving over 99% TCE degradation. The experimental results also indicate that in acidic environments, both SO4·- and OH· radicals play a dominant role in TCE degradation, while high levels of carbonates, bicarbonates, and NOM inhibit the oxidation reaction of TCE.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Chemical
Zhengyuan Zhou, Jingyao Huang, Zhiqiang Xu, Meesam Ali, Ali Shan, Rongbing Fu, Shuguang Lyu
Summary: This study investigated the synergistic effect of Fe(II)/CA, Fe(II)/nZVI, and Fe(II)/S-nZVI as activated catalysts for TCE removal, with HO center dot and SO4 center dot playing crucial roles in TCE degradation. Additionally, the presence of CA was found to maintain Fe(II) concentration for catalytic activity.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Environmental
Jingyao Huang, Zhengyuan Zhou, Muhammad Danish, Qian Sui, Shuguang Lyu
Summary: This study investigated the effect of synergistic strengthening by citric acid (CA) coupled with micron zero valent iron (mZVI) in Fe(II) catalyzed sodium percarbonate (SPC) system on trichloroethylene (TCE) removal in an aqueous environment with the existence of sodium dodecyl sulfate (SDS). Compared with SPC/Fe(II), SPC/Fe (II)/mZVI, SPC/Fe(II)/CA, and SPC/Fe(II)/CA/mZVI systems, the synergistic strengthening effect by CA and mZVI could maximize TCE removal to 92.0 % and dechlorination of TCE to 88.0 % within 30 min. Furthermore, the synergistic system has the widest pH range of 3-7. The presence of CA and mZVI continuously releases Fe(II) and efficiently promotes the formation of hydroxyl radicals, as well as other reductive radicals such as superoxide radical and carbon dioxide radical. The system shows superiority in the remediation of actual contaminated groundwater.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Engineering, Environmental
Yinxu Wang, Andac Armutlulu, Wenyuan Hu, Ruzhen Xie
Summary: In this study, a durable zero-valent iron super dispersed sodalite-graphene oxide hybrid was developed and applied as a visible-light-driven photocatalyst for the remediation of ciprofloxacin. The hybrid material had a mesoporous structure with strong interaction between iron and GO, allowing efficient charge separation and transportation. The use of solar energy for catalyst preparation and wastewater remediation was demonstrated, offering a sustainable solution for environmental solid waste pollution and water scarcity.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Jingyao Huang, Zhengyuan Zhou, Shuguang Lyu
Summary: Based on a comparative study, it was found that citric acid (CA), oxalic acid (OA), and glutamic acid (GA) chelating agents could relieve the inhibition of sodium dodecyl sulfate (SDS) on trichloroethylene (TCE) removal in the Fe(II) catalyzed sodium percarbonate (SPC) system. GA, in particular, had the most significant promoting effect on TCE degradation due to the presence of SDS. The combination of GA and SDS could maintain the highest Fe(II) content and accelerate the formation of hydroxyl radical (HO center dot), leading to increased TCE removal.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Engineering, Environmental
Ayesha Idrees, Ali Shan, Meesam Ali, Zain Abbas, Tanvir Shahzad, Sabir Hussain, Faisal Mahmood, Usman Farooq, Muhammad Danish, Shuguang Lyu
Summary: Polyvinylpyrrolidone coated nano zero valent iron-copper (PVP-nZVI-Cu) bimetallic nanoparticles were successfully synthesized for dechlorination of trichloroethylene (TCE) into non-toxic byproducts in the presence of persulfate oxidant. The system showed significant potential in real groundwater for remediation of TCE contaminated groundwater.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Environmental
Usman Farooq, Fei Wang, Jingyi Shang, Malik Zeeshan Shahid, Waseem Akram, Xinhai Wang
Summary: This study developed an efficient and environmentally friendly method for remediating groundwater contaminants using a natural organic ligand cysteine. By improving the redox cycling of iron species, the method achieved enhanced degradation of trichloroethylene (TCE) under neutral conditions.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Jiashu Liu, Lin Zhao, Hongzhi Geng, Bin Wang, Xuejiao Tong, Yihan Li, Daying Chen, Peizhe Sun, Yongkui Yang
Summary: This study investigates the removal of trichloroethylene (TCE) using Fe-MOF-derived carbon (MFC) in combination with persulfate (PS). The results show that Fe-MOF-derived materials from different templates exhibit varying TCE removal rates, and the pyrolysis temperature of MFC affects its physicochemical properties and catalytic performance. The MFC600 catalyst derived from MF88B and pyrolyzed at 600 celcius demonstrates excellent catalytic activity over a wide pH range and a possible degradation mechanism is proposed.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Review
Green & Sustainable Science & Technology
Zhewei Hu, Jiaqi Shi, Hao Yang, Jianbo Huang, Feng Sheng
Summary: The addition of organic catalysts to promote pollutant oxidation degradation has garnered significant attention. Studies have shown that organic substances can enhance traditional oxidation reactions by accelerating the redox cycle of transition metals, activating oxidants to produce reactive oxygen species, or altering the electron distribution of pollutants. The development of metal-organic frameworks has provided a promising avenue for enhancing practical applications of oxidation technology.
Article
Engineering, Environmental
Zejun Wang, Zhibing Yang, Fritjof Fagerlund, Hua Zhong, Ran Hu, Auli Niemi, Tissa Illangasekare, Yi-Feng Chen
Summary: This study investigates the pore-scale dynamics of trichloroethylene degradation by permanganate through microfluidic experiments. The comprehensive descriptions of the growth patterns of the solid phase and their impact on the remediation efficiency are provided, and the stabilization mechanism provided by phosphate supplement is further validated.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Chemical
Zong-Han Yang, Ya-Lei Chen, Francis Verpoort, Cheng-Di Dong, Chiu-Wen Chen, Chih-Ming Kao
Summary: The study investigated the feasibility and effectiveness of in situ chemical oxidation (ISCO) for remediating sulfolane-contaminated groundwater through batch and pilot-scale studies. The results showed that the Fenton reaction could achieve complete sulfolane oxidation under specific operational conditions.
DESALINATION AND WATER TREATMENT
(2021)
Article
Chemistry, Multidisciplinary
Mengyang Wang, Yao Huang, Hui Liu
Summary: To address the safety risks and low utilization efficiency of H2O2 in traditional Fenton processes, researchers have turned to in situ production of H2O2 through enzymatic reactions. In this study, magnetite-immobilized glucose oxidase (MIG) was prepared and used for the heterogeneous Fenton reaction to remove trichloroethene from water. The MIG system exhibited high removal efficiency and remained effective across a wide range of temperature and pH conditions, with slight inhibition by certain cations, anions, and humic acid. The immobilized enzymes showed potential for in situ generation of reactive oxidative species and remediation of organic chlorinated contaminants.
Article
Engineering, Environmental
Ayesha Idrees, Ali Shan, Waqas Qamar Zaman, Ali Mohsin, Zain Abbas, Tanvir Shahzad, Atif Shakeel, Shuguang Lyu
Summary: M-metal (Ca and Cu) doped Ca-Fe2O3 and Cu-Fe2O3 catalysts were synthesized using solvothermal method. The catalytic performance of these catalysts for trichloroethylene (TCE) removal were improved by M-metal doping, leading to significantly higher TCE removal efficiency. Doping created defective structures and increased oxygen vacancies, resulting in the generation of abundant active species during the activation process.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Environmental Sciences
Carmen M. Dominguez, Arturo Romero, Alicia Checa-Fernandez, Aurora Santos
Summary: The intensive use of organochlorine pesticides and inadequate waste management pose a huge environmental problem. This study addressed the application of different chemical oxidation treatments for the remediation of HCH-polluted soils. Results showed that the combination of hydrogen peroxide and persulfate activated by alkali showed promising results in purifying contaminated soil.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
Yong Sun, Ming Li, Xiaogang Gu, Muhammad Danish, Ali Shan, Meesam Ali, Zhaofu Qiu, Qian Sui, Shuguang Lyu
Summary: The study found that TW-80 was the optimal surfactant for TCE solubilization and degradation. In the presence of 1 g L-1 TW-80, over 97.5% of TCE was removed at the PS/Fe(II)/CA/TCE molar ratio of 30/4/4/1, with more than 86.7% of TCE dechlorinated. The results suggest the potential of the PS/Fe(II)/CA process for actual groundwater remediation in containing TW-80 of TCE contaminant.
JOURNAL OF HAZARDOUS MATERIALS
(2021)