Article
Environmental Sciences
L. Jothinathan, Q. Q. Cai, S. L. Ong, J. Y. Hu
Summary: The combined microbubble-catalytic ozonation process (M-O-3/Fe/GAC) was found to significantly enhance the efficiency of ozonation in petrochemical wastewater treatment, achieving a COD removal efficiency of 88% and a reduction of phenolic compounds by 63% within 15 minutes.
Article
Chemistry, Analytical
Ziguo Liu, Wei Zhou, Xianli Liu, Xuefen Yang, Wei Yang, Han Zheng
Summary: In this study, the combination of zero-valent iron Fenton reagent (ZVI Fenton-like) system and chemical precipitation method was used for the treatment of desulfurization wastewater from coal-fired power plants by evaluating the organic matter through chemical oxygen demand (COD). The study investigated the effects of reaction time, H2O2 dosage, zero-valent iron dosage, pH, and reaction temperature. The results showed that the optimal operating conditions were achieved when the ZVI Fenton-like reagent system ran for 1 hour, with H2O2 dosage of 33.3 mg/L, iron dosage of 0.075 g/L, pH ranging from 4.5 to 6.5, and reaction temperature of 35°C. The study provides a new approach for the treatment of desulfurization wastewater from coal-fired power plants.
Article
Engineering, Environmental
Qianhui Liu, Yangyang Chen, Ting Mei, Shaohui Wang, Lizhi Zhang, Hongwei Sun, Xiaomei Liao
Summary: In this study, oxalated zero-valent iron (OA-ZVIbm) catalyzed ozonation was demonstrated to effectively remove typical antibiotic resistance genes (ARGs) tetG and sul1 from municipal sewage sludge, surpassing the performance of ozone alone and ozone/zero-valent iron counterparts. The treatment also eliminated total Class 1 integron (total intI1) and may suppress the horizontal gene transfer potential of ARGs. The good performance of the treatment was attributed to the FeC2O4 center dot 2H(2)O shell of ZVI, which enhanced the accessibility of core iron species for the decomposition of ozone and the production of reactive oxygen species (ROSs) for ARG removal.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Environmental
Jiajun Wu, Jingjing Zheng, Ke Ma, Chao Jiang, Liang Zhu, Xiangyang Xu
Summary: This study constructed three bench-scale integrated flow constructed wetlands (IFCWs) to investigate the tertiary treatment of municipal wastewater with different filler medium arrangements. The incorporation of biochar and zero-valent iron (ZVI) significantly enhanced nutrient removal efficiency. Analysis of microbial community and functional genes revealed the enrichment of nitrifiers in biochar-treated IFCW and denitrifiers in ZVI-biochar-treated IFCW. Principal component analysis (PCA) indicated that biochar mainly enhanced microbial nitrification, while ZVI improved denitrification and anammox.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Engineering, Environmental
Jinyu Hou, Yun Zhang, Xianghua Wu, Linmeng Liu, Yucheng Wu, Wuxing Liu, Peter Christie
Summary: The study found that zero-valent iron (ZVI) can promote the biomineralization of lindane, but it has a certain inhibitory effect on the growth and functions of soil bacterial community. Metagenomic analysis revealed that the genes involved in the degradation of lindane were upregulated, but the presence of genes responsible for lindane dechlorination was not confirmed. In addition, the benzoate biodegradation pathway linked to the downstream catabolism of lindane was enhanced.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Engineering, Chemical
Lei Guo, Zhiqiang Xiao, Wenquan Sun, Hao Xu, Yanhua Xu, Huaili Zheng, Yongjun Sun
Summary: In this study, a honeycomb ceramic catalyst Fe/Mn@CH with high catalytic activity was prepared and its optimal working conditions and mechanism in the degradation of Fischer-Tropsch synthesis wastewater were systematically studied.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Environmental Sciences
Inyoung Kim, Daniel K. Cha
Summary: The study found that ZVI-supported microbial denitrification is more sustainable at lower temperatures, and it becomes a more dominant reaction for nitrate removal in microbial-ZVI systems at low temperatures.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Chemistry, Physical
Ge Gao, Lei Zhang, Yixin Shi, Shengjiong Yang, Gen Wang, Huining Xu, Dahu Ding, Rongzhi Chen, Pengkang Jin, Xiaochang C. Wang
Summary: The study found that the microscopic galvanic cell (mGC) exhibited higher Fe(II) release performance compared to ordinary nanoscale-ZVI (nZVI), resulting in improved Cr(VI) removal efficiency. Density functional theory (DFT) revealed that the close proximity of cathode and anode in mGC enhanced the galvanic corrosion of Fe(0). Additionally, hydroxyl radicals generated by a series of side-reactions slightly hindered the reduction of Cr(VI) in the system.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Environmental Sciences
Feng Liang, Le Wang, Huijie Zhu, Qian Dong, Yan Zhang, Jiayan Liu, Siyu Zhang, Zhiwei Ye, Ye Zhang, Xiuji Zhang, Bo Liu
Summary: In this study, a domestic metallurgical enterprise's As(V)-rich wastewater was treated using zero-valent iron (ZVI) to remove arsenate (As(V)). Experimental results showed that ZVI of specific particle size can efficiently remove As(V) from the wastewater, with an arsenate removal percentage of over 98.2%. Column experiments demonstrated that ZVI is more effective in removing arsenate from wastewater compared to other adsorbents, while meeting the national discharge standard for other pollutants. Therefore, ZVI is an ideal candidate for efficient, cost-effective, and environmentally friendly heavy metal removal from wastewater.
Article
Chemistry, Physical
Jingjuan Qiao, Weizhou Jiao, Youzhi Liu
Summary: The study proposed a sequential NZVI-Na2S2O8 process for degrading NB-containing wastewater, achieving high efficiency in NB degradation and total organic carbon removal. Sulfate radicals (SO4 center dot-) and hydroxyl radicals ((OH)-O-center dot) were identified as playing a major role in the process through electron paramagnetic resonance spectroscopy and radical capture experiments.
GREEN ENERGY & ENVIRONMENT
(2021)
Article
Engineering, Environmental
Cintia Andreia Alves Pereira, Mariana Riboli Nava, Jilvana Barbara Walter, Claudio Eduardo Scherer, Amanda Dominique Kupfer Dalfovo, Marcio Barreto-Rodrigues
Summary: The study prepared calcium alginate beads incorporated with nZVI and applied them in a catalytic ozonation system for dye treatment, showing high process efficiency and potential application in treating petroleum effluents.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Environmental
Yanping Shi, Tao Liu, Xie Quan, Shuo Chen, Hongtao Yu, Wuzhe Quan
Summary: A municipal WWTP upgraded its process to A2O-IFFAS by filling ZVI-modified biofilm carriers into anoxic bioreactors and clinoptilolite-modified biofilm carriers into aerobic bioreactors. The upgraded process achieved high nitrogen removal efficiency and met the discharge standard requirements.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Afzal Ansari, Vasi Uddin Siddiqui, Md. Khursheed Akram, Weqar Ahmad Siddiqi, Anish Khan, Abeer Nasser Al-Romaizan, Mahmoud A. Hussein, Madhu Puttegowda
Summary: In this study, nZVI was fabricated through wet chemical technique using ferric iron and sodium borohydride as reducing agents in the presence of ethanol. The obtained nZVI particles remained in a zero-valent oxidation state and showed spherical morphology. The catalytic treatment performance of domestic wastewater was evaluated, and the results showed that anaerobic condition significantly improved COD solubilization and suspended solids reduction. The presence of iron ions enhanced the reduction of phosphorous by nZVI.
Article
Engineering, Environmental
Yuting Yuan, Shikha Garg, Yuan Wang, Wenbo Li, Guifeng Chen, Minglong Gao, Jinlong Zhong, Jikun Wang, T. David Waite
Summary: The presence of salts, particularly chloride ions, significantly influences the performance of both conventional and catalytic ozonation processes by affecting the rate and extent of organic compound degradation. This influence is due to scavenging of O-3, transformation of organics to more hydrophobic forms, and inhibition of hydroxyl radicals. Through appropriate choice of catalyst, this effect can be mitigated to some extent.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Engineering, Chemical
Ningfan Song, Zihan Chen, Jinghua Shi, Dezhi Shi, Li Gu
Summary: The study demonstrated that the Pd/Cu bimetallic catalyst supported on a chelating resin can effectively reduce nitrate to N2 under neutral conditions, without generating other intermediate compounds or by-products, showing a high selectivity for N2.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Environmental
Heng Zhang, Renjing Zhang, Zechao Wu, Fashan Yang, Mengfan Luo, Gang Yao, Zhimin Ao, Bo Lai
Summary: In this study, cobalt-doped perovskite material was synthesized and used for peroxymonosulfate (PMS) activation to remove atrazine from water. The performance of PMS activation was significantly improved by doping cobalt. The primary active species in the LFCO/PMS system were determined to be (OH)-O-center dot and SO4 center dot-. The activation pathway of LFCO was revealed and a synergistic effect between cobalt and iron was identified. The potential application of the LFCO/PMS system and the transformation pathway of atrazine were also discussed.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Engineering, Environmental
Zhongjuan Wang, Ye Du, Peng Zhou, Zhaokun Xiong, Chuanshu He, Yang Liu, Heng Zhang, Gang Yao, Bo Lai
Summary: Low Fe(II) generation is the main limitation for Fenton process, and providing electrons is the solution to promote Fe(III) reduction. This study systematically reviewed the strategies for enhancing Fe(III)/Fe(II) cycle based on electron donors, which can be classified into five categories: e-PF, e-EF, e-Re, e-Ox, and e-TC. The principles and mechanisms of each enhanced Fenton process were clarified, and the role of chelate agents and carbon-based materials were discussed. Among them, e-Re showed the best performance in pollutant degradation, making it the most promising approach. The development of reductants for future practical application is necessary.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Minxian Cheng, Yichu Zhang, Bo Lai, Lingzhen Wang, Shengjiong Yang, Kailong Li, Dongqi Wang, Yaoguo Wu, Guang-Hao Chen, Jin Qian
Summary: Nitrogen and phosphorus co-doped porous carbons were synthesized and their excellent degradation ability to tetracycline was observed. Electron transfer mediated by metastable reactive complexes and singlet oxygen played a key role in the degradation process. The introduction of phosphorus promoted the adsorption and activation of peroxydisulfate, leading to high-efficiency removal of contaminants.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Min Wang, Yiwu Tang, Jiadian Wang, Zhenqi Xu, Qing Dong, Taizhuo Ma, Bo Lai
Summary: This study prepared a nitrogen-doped carbon-embedded iron on a nickel foam cathode for the activation of peroxydisulfate for organic pollutant degradation. The optimized cathode showed excellent removal efficiency for sulfamethoxazole, with almost 100% removal achieved in 15 minutes. The study also provided valuable insights into the catalytic active sites of the cathode for PDS activation.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Yuchen Zhang, Peng Zhou, Rongfu Huang, Chenying Zhou, Yang Liu, Heng Zhang, Xiaowei Huo, Jian Zhao, Zhaokun Xiong, Bo Lai
Summary: In this study, iron boride (FeB) was proposed as a new material to sustainably decompose H2O2 to generate hydroxyl radicals, which can degrade refractory organic pollutants. Fe(II) was steadily released by the oxidation of FeB, and B-B bonds on the surface of FeB promoted the regeneration of Fe(II) from Fe(III) and accelerated the production of hydroxyl radicals. The FeB/H2O2 system showed low generation of toxic by-products and high utilization rate of iron species, providing a green and long-lasting environmental remediation strategy.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Engineering, Chemical
Lili Ma, Jieyu Xu, Yucheng Liu, Yongtao An, Zhicheng Pan, Bing Yang, Lingli Li, Ting Hu, Bo Lai
Summary: In this study, a bimetallic organic framework doped with Cu was fabricated and used as a catalyst for the degradation of tetracycline through the combined process of visible-light photocatalysis and persulfate oxidation. The results showed that the Cu-doped framework significantly improved the degradation efficiency of tetracycline under certain operating conditions.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Chemical
Lingli Li, Qi Liao, Bingchao Hou, Chuanshu He, Jiamei Liu, Bingrui Li, Ming Yu, Yucheng Liu, Bo Lai, Bing Yang
Summary: A functionalized magnetic chitosan beads (MCB-ECH-SH/SO3H) was found to efficiently remove hexavalent chromium (Cr(VI)) from wastewater by reducing it to less toxic trivalent chromium (Cr(III)). The material also exhibited high stability, strong reducing capacity, easy recycling, making it an ideal candidate for treating chromium-containing wastewater.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Environmental
Shuang Meng, Minglu Sun, Peng Zhang, Chenying Zhou, Chuanshu He, Heng Zhang, Yang Liu, Zhaokun Xiong, Peng Zhou, Bo Lai
Summary: Metal borides act as a new class of co-catalysts to enhance Fenton-like oxidation for environmental remediation, by steadily donating electrons to inactive Fe(III) and overcoming the drawbacks of Fenton-like reactions.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Jiali Peng, Peng Zhou, Hongyu Zhou, Bingkun Huang, Minglu Sun, Chuan-Shu He, Heng Zhang, Zhimin Ao, Wen Liu, Bo Lai
Summary: The mechanism of carbon nanotubes (CNTs)-driven periodate (PI) activation for the oxidation of phenols was investigated. It was found that CNTs can strongly boost PI activation by forming high-potential metastable intermediates (CNTs-PI*). The adsorption of phenols on CNT surfaces and the electronic properties of CNTs play critical roles in the oxidation process.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Zelin Wu, Bingkun Huang, Xinhao Wang, Chuan-Shu He, Yang Liu, Ye Du, Wen Liu, Zhaokun Xiong, Bo Lai
Summary: The catalytic activity of Fe-NxC4-x sites with different coordination environments was predicted through theoretical calculations. Substituting N with C to coordinate with Fe atom resulted in inferior Fenton-like catalytic efficiency. Three configurations of Fe-SACs (Fe-N2C2, Fe-N3C1, and Fe-N4) were fabricated and showed that optimized Fe-NxC4-x coordination environments significantly promoted Fenton-like catalytic activity. The coordination dependency of Fe-SACs was also observed in terms of catalytic stability and actual hospital sewage treatment capacity. This strategy of local coordination engineering provides an example of how to modulate SACs with well-regulated coordination environments to maximize their catalytic efficiency.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Bingkun Huang, Xinyi Ren, Jian Zhao, Zelin Wu, Xinhao Wang, Xinyu Song, Xuning Li, Bin Liu, Zhaokun Xiong, Bo Lai
Summary: This study reports the functional group modification of model single atom catalysts (SACs) to improve the catalytic performance in Fenton-like reactions. The modified cobalt phthalocyanine catalyst exhibited superior catalytic activity and the mechanism was revealed through density functional theory (DFT) calculations. Scale-up experiments also demonstrated the stability and efficiency of the catalyst.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Mengfan Luo, Heng Zhang, Yang Shi, Jia Zhao, Can Feng, Jialong Yin, Yang Liu, Peng Zhou, Zhaokun Xiong, Bo Lai
Summary: In this study, electrochemical activation using graphite electrodes was found to significantly enhance the degradation of micropollutants by periodate. The system showed high efficiency in removing bisphenol A, wide pH tolerance, and long-term stability. It also reduced the formation of iodinated disinfection by-products by transforming periodate into iodate.
Article
Engineering, Environmental
Liwei Yang, Chao Hai, Heng Zhang, Can Feng, Mengfan Luo, Peng Zhou, Juntong Leng, Xinyuan Tian, Chuanliang Zhao, Bo Lai
Summary: This study investigated the degradation of methyl parathion using potassium ferrate. It was found that potassium ferrate has strong oxidation and adsorption abilities, and can completely degrade methyl parathion within a short period of time. Three conversion pathways of methyl parathion were proposed based on the identified by-products, and the toxicity of potassium ferrate-degraded methyl parathion was significantly reduced.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Environmental
Peishan Li, Hui Ma, Sijia Qian, Yi Chen, Bo Lai, Shengyan Pu
Summary: In this study, nFeS was modified with sodium carboxymethyl cellulose (CMC) to improve its stability and catalytic reactivity. The CMC-nFeS activator showed a higher reaction rate constant and better removal efficiency of p-nitrophenol compared to pure nFeS.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Physical
Rongrong Ding, Guannan Zhou, Chuanshu He, Wenqiang Li, Yiran Wang, Xiaocheng Liu, Bo Lai, Yang Mu
Summary: This study highlights the influence of coexisting heavy metals on the degradation of contaminants during FeS oxygenation. The introduction of Co2+ and Ni2+ significantly enhances the degradation of bisphenol A by increasing the generation of reactive species.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
