CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Zhijie Liu,Xin Li,Hezhi Guo,Zekai Zhang,Yongchun Wang,Polun Pang,Yuting Gao,He Guo
This paper presents a novel type of Underwater Bubble Plasma-Divalent Copper Salt-Peroxymonosulfate (UBP-Cu(Ⅱ)-PMS) for the efficient degradation of emerging contaminants in water. The results demonstrate that Cu(Ⅱ)-PMS can be effectively activated during UBP treatment process, generating two highly reactive free radicals ( OH and · S O 4 _ ) that promote the degradation of high-concentration tetracycline hydrochloride (TC). A comparative analysis of UBP’s performance in activating persulfate (PS), PMS, and sulfite (S(IV)) for the synergistic degradation of TC revealed that PMS and UBP exhibited the strongest synergistic effect. When PMS is 0.5 g/L, the activation performance peaked, with the UBP-PMS system achieving an impressive 87.22 % degradation efficiency of TC within 20 min, which is 30.02 % higher than that of the single UBP system. Furthermore, upon introducing Cu(Ⅱ) into the UBP-PMS system, with PMS at 0.5 g/L and Cu(Ⅱ) at 0.05 g/L, the degradation efficiency of TC reached 95.73 %, and energy efficiency was measured at 1.5509 g·(kWh) −1 within 20 min, surpassing other treatment systems. Free radical trapping experiments indicated that the primary reactive species responsible for TC degradation in UBP-Cu(Ⅱ)-PMS co-catalytic strategy include OH, ONOOH/ · O 2 _ , · S O 4 _ and 1 O 2 . Fenton-like reaction enhances the concentration of OH in the solution, while oxygen-sulfur radical reaction produces · SO 4 \_ . The conversion between different valence states of Cu primarily involves electron transfer. Possible degradation pathways were proposed based on DFT calculations and LC-MS analysis during the synergistic treatment, and the toxicity of by-products generated during the degradation process was evaluated using T.E.S.T. software. Ultimately, a synergistic degradation mechanism for the UBP-Cu(Ⅱ)-PMS strategy was proposed. This study introduces a new activation strategy involving UBP-Cu(Ⅱ)-PMS and provides valuable insights into the degradation performance and mechanisms of emerging contaminants.
研究领域:
环境科学
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化学工程
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
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IF 9.9
Hengxin Liu,Haoxi Dai,Shuang Wu,Ning Li,Beibei Yan,Guanyi Chen
Persulfate (PS) activated by thermal or homogeneous metals can generate reactive oxygen species (ROS) and high-valence-state metals for contaminants degradation, showing great potential for applications. However, thermal effect in peroxymonosulfate (PMS) system with high-valence-state metal is still ambiguous. In this study, divalent copper (Cu(II)) catalysis was taken to explore thermal effect on PMS performance. Results showed that the Sulfamethoxazole (SMX) removal efficiency in the Cu(II)/PMS system at 60 min increased by only 5.9% with temperature increase from 30 °C to 60 °C. Moreover, SMX removal efficiency was excellent at neutral or basic pH, best with PMS concentration of 2.4 mM, and slightly affected by Cu(II) concentration. The singlet oxygen ( 1 O 2 ) was identified as main active species at low temperature while sulfate radicals (SO 4 − ) was more effective at high temperature with Cu(II) co-activation. Also, trivalent copper (Cu(III)) was an important active species. The higher Cu(III) content, the better SMX removal efficiency, but the stronger intermediates toxicity. In combination with removal efficiency and intermediates toxicity at different temperatures, 30 °C was the optimal reaction temperature. Overall, this study provides new perspective on utilization of waste heat and high-valence-state metal for organic wastewater treatment in PMS systems.
研究领域:
环境科学
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化学工程
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水处理
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DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
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2025
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IF 5.1
Ying Zhang,Jing Hu,Chenghui Li,Xiandeng Hou
A novel photochemical vapor generation (PVG)-inductively coupled plasma mass spectrometric (ICP-MS) method was proposed for the sensitive determination of trace cobalt. A synergistic enhancement effect of Fe(II) and Cu(II) ions on the PVG of cobalt was discovered in this work. The critical factors influencing the PVG process, including the reaction medium, the UV irradiation time, and the flow rate of carrier gas were investigated in detail; and the interference of the coexisting ions was also studied. The analytical sensitivity of this method increased by about 16-fold in comparison with that of the PVG without sensitizers, and the limit of detection (LOD) for cobalt was found to be 2 ng L −1 . The possible photocatalytic mechanism of the photochemical reaction was initially explored through experimental studies. The method was successfully applied to the direct analysis of seven real water samples for trace cobalt, showing analytical results consistent with those by pneumatic nebulization (PN)-ICP-MS and achieving spike recoveries of 97–113 %. The findings of this study would extend the application scope of PVG technique.
研究领域:
分析化学
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环境化学
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光谱学
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无机化学
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DOI
高影响因子
ENZYME AND MICROBIAL TECHNOLOGY
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2019
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IF 3.553
Zhiwei Deng,Zichao Wang,Pan Zhang,Pinghui Xia,Kedong Ma,Degang Zhang,Lin Wang,Yusuo Yang,Yuejing Wang,Shipeng Chen,Shilong Deng
The effects of divalent copper (Cu(II)) on microbial community, enzymatic activity and functional genes in a sequencing batch reactor (SBR) at tetracycline (TC) stress were investigated. The enzymatic activity and functional genes abundance associated with nitrification and denitrification at a 20 mg L −1 TC stress were higher than those at a mixtures stress of 20 mg L −1 TC and 10 mg L −1 Cu(II), while they were lower than those at a mixtures stress of 20 mg L −1 TC and 40 mg L −1 Cu(II). Compared to lactate dehydrogenase (LDH) release and reactive oxygen species (ROS) production at a 20 mg L −1 TC stress, they were lower at the TC stress with 10 mg L −1 Cu(II), while they were higher at the TC stress with 40 mg L −1 Cu(II). The incremental Cu(II) concentration at a 20 mg L −1 TC stress could not change the result that the sensitivity of denitrifying enzymatic activity to TC was higher than nitrifying enzymatic activity. Compared to the relative abundance of nitrifers and denitrifers at a 20 mg L −1 TC stress, the 10 mg L −1 Cu(II) addition resulted in their increase, while they decreased as the 40 mg L −1 Cu(II) addition. The relative abundance of genera Pseudomonas, Rivibacter and Nitrobacter at the stress of Cu(II) and TC were higher than those at TC stress, suggested they had an ability to resist the stress of Cu(II) and TC.
研究领域:
环境工程
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微生物学
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生物技术
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Jin-Zheng Wang,Cheng-Kun Wu,Xin-Ying Wang,Yuan-Zhi Xu,Richard Ansah Herman,Sheng Sheng,Shuai You,Jun Wang,Fu-An Wu
Edible insects are rich in oil and protein resources, and has it become increasingly important to develop them reasonably when resources are increasingly scarce. However, due to the challenges in recovering enzymes in the enzyme-assisted aqueous extraction technique and the remaining organic solvents in the extraction process based on organic solvent, it is difficult to achieve simultaneous utilization of oil and protein from edible insects. Hence, an improved enzyme-assisted aqueous extraction process based on the assistance of chitosan cross-linked Fe 3 O 4 nanoparticles (CNPs) immobilized enzymes and divalent copper ions chelation, [email protected] aqueous extraction technique, was first proposed. The hydrolysis activity was significantly increased by 6.16 times, and the value of K cat / K m was increased by 1.7 times for the results of the formation of the hydrophilic microenvironment. Furthermore, the extraction ratio of silkworm pupae oil extracted via [email protected] aqueous extraction technique could be increased to 93%, and the oil extraction rate could be maintained above 65% after 10 times reused. Improvement of enzyme-assisted aqueous extraction under the addition of divalent copper ions could achieve an ideal effect of oil extracted from silkworm pupae with less time. Additionally, the quality of silkworm pupae oil was significantly improved and the silkworm pupae protein hydrolysate also showed improved biological activity. Therefore, the enzyme-assisted aqueous extraction enhancement by trypsin immobilization and divalent copper ion chelation is a promising strategy for the green and sustainable exploration of edible insect oil and protein without the use of organic solvents.
研究领域:
食品科学
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生物化学
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纳米技术
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酶学
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可持续资源利用
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DOI
高影响因子
Journal of Materials Chemistry B
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2022
·Vol. 10
·期 22
·4293-4305
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IF 7.571
Ning Gan,Wei Qin,Chunlei Zhang,Ting Jiao
Postoperative infection and poor osteogenesis will cause the failure of dental implant surgery. Thus, the antibacterial and osteogenic activities are the core requirements for the surface modification of dental implants. Inspired by the strong chelating ability of naturally occurring phytic acid (PA), an in situ deposition method on the surface of titanium implants was developed based on the metal–phosphate coordination networks. Biologically relevant metal cations (i.e. ferric ions and divalent copper ions) were selected as metal constituents for the construction of organic–inorganic coordination network films. The stability of PA–metal coordination bonds is rationally explained by the chemical nature of transition metal elements. This PA–metal coordination complex coating exhibited an excellent antibacterial activity against Porphyromonas gingivalis, reducing the bacterial implant colonization by > 3.92 log10. The abundant phosphate groups greatly increased the surface hydrophilicity, promoted the early adhesion of proteins, improved the proliferation of bone marrow mesenchymal stem cells, and finally achieved an enhanced osteogenic activity. In addition, the phosphate groups of PA also facilitated the deposition of hydroxyapatite by providing reaction sites to chelate with calcium ions. These findings evaluate the anti-bacterial and osteogenic potentials of PA–metal coordination complexes, and clarify the feasibility for surface modification of dental implants.
研究领域:
牙科材料
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生物材料
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表面化学
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生物医学工程
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微生物学
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组织工程
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）