JOURNAL OF HAZARDOUS MATERIALS
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2026
·
IF 10.6
Dingqiang Zhang,Xiaoqun Wu,Tengchao Jiao,Weizhen Zhang,Jiahao He,Yanhua Xie,Yingming Hu,Yao Wei
Trace-Cu(II)/CaO 2 /PAC achieves > 95% algal removal in natural waters. • Pre-oxidation degrades algal extracellular matter to aid coagulation. • PAC mitigates matrix interference, indirectly maintaining oxidation. • Intracellular ROS induces functional death without severe lysis. Harmful algal blooms release microcystins and other metabolites that threaten aquatic ecosystems and human health. Conventional removal methods often induce cell lysis and are affected by matrix interference in natural waters, limiting their practical applicability. A sequential process coupling trace-Cu(II)/CaO 2 pre-oxidation with PAC coagulation was developed for efficient algal removal. The system removed 98.5% of M. aeruginosa from lake water. During the 10-min pre-oxidation stage, trace-Cu(II)/CaO 2 effectively degraded extracellular microcystin-LR (MC-LR) and the dissolved organic matter (DOM) surrounding algal cells, thereby weakening electrostatic repulsion and enhancing coagulation efficiency. The coupled process generated Cu(III), •OH, •O 2 − , and 1 O 2 within the cells, which led to functional cell death without severe membrane rupture. Conventional molecular dynamics (MD) simulations confirmed the stability of a representative pentameric cation-channel model, and steered molecular dynamics (SMD) further showed that Cu 2+ and H 2 O 2 could be guided through its pore under an applied axial bias, supporting the physical plausibility of channel-mediated intracellular access. Mechanistically, OH − generated during CaO 2 hydrolysis promoted the Cu(II)/Cu(I)/Cu(III) catalytic cycle and sustained reactive species production, with Cu(III) as the dominant contributor to functional inactivation (68.5%). These findings establish an innovative and practical strategy for the safe and effective removal of algae from contaminated natural waters. Download: Download high-res image (297KB) Download: Download full-size image
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Xianhong Deng,Wenbin Wu,Shuangqin Tian,Yi He,Shujie Wang,Bifang Zheng,Kai Xin,Ziqin Zhou,Lihong Tang
In this study, we employed a straightforward in-situ synthesis strategy to fabricate multi-site adsorption functional composites known as aminated chitosan@ZIF-8 (AmCs@ZIF-8) for the efficient removal of Cu(II) and Congo red. The AmCs@ZIF-8 adsorbed Cu(II) at pH 5 and Congo red at pH 3 with excellent removal efficiency values of 94 % and 100 % respectively. The maximum adsorption capacity for Cu(II) and Congo red are obtained as 785 mg g −1 and 1156 mg g −1 , respectively. Interestingly, AmCs@ZIF-8 composites exhibited an excellent removal efficiency (>80 %) after reusing them for four sequential cycles. Analysis of the adsorption isotherm and kinetic data indicated that chemisorption primarily governed the adsorption of Cu(II) and Congo red by AmCs@ZIF-8. Furthermore, we elucidated the adsorption energy of Cu(II) and Congo red on the AmCs@ZIF-8 composite through density functional theory. Specifically, the adsorption energy values for Cu(II) with AmCs and ZIF-8 were −20.907 and −57.809 kcal·mol −1 , and −26.514 and −16.242 kcal·mol −1 for Congo red, respectively. The efficient adsorption mechanism of Cu(II) and Congo red on the AmCs@ZIF-8 composite can be attributed to the synergistic effects of chelation, electrostatic attraction, ion exchange, and hydrogen bonding through the analysis of experimental characterization and theoretical calculation. Therefore, AmCs@ZIF-8 composites elevate the adsorption capacity of Cu(II) and Congo red in a single-component system and exhibit high removal efficiency (>90 %) in the context of the Cu(II)-Congo red binary system.
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FUEL
·
2023
·
IF 7.4
Mengxia Qing,Wenbin Liu,Liang Liu,Sibiao Huang,Zihang He,Yanshan Yin,Jun Xiang
Enhancing biochar's adsorption and solidification performance in compound-polluted aqueous solutions remains a crucial task for achieving the cost-effective removal of heavy metals from water bodies. The study examined the removal performances and mechanisms of Cu(II) and Cr(III) using biochar prepared from food waste at temperatures of 350 °C, 450 °C, and 550 °C (FWB-350, FWB-450, and FWB-550). FWB-450 exhibited the highest overall effectiveness in adsorbing Cu(II) and Cr(III), demonstrating the adsorption capacity (Q e ) of 40.283 and 21.456 mg/g in single-solution, respectively. Thermodynamic parameters indicate that the adsorption process involves physical and chemical reactions involving heat absorption. The impact of Cr(III) on the adsorption of Cu(II) is more apparent in the mixed competitive system. The pH, the oxygen-functional groups and carbonate ion quantity of FWB are crucial in improving Cu(II) and Cr(III) adsorption by affect the hydrolysis, complexation, and ion exchange processes. The presence of alkaline earth metal ions in FWB, like Ca(II), aids in the elimination of Cu(II) and Cr(III) through ionic precipitation and ion exchange, correspondingly. Furthermore, FWB adsorbed with Cu(II) and Cr(III) is relatively less hazardous than solid waste. The study validates the resource utilization of FW and its potential application of biochar in heavy metal adsorption.
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2021
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IF 4.464
Baitong Niu,Biying Yao,Meihua Zhu,Hongxu Guo,Shaoming Ying,Zhangxu Chen
A fern leave-like structure metal-organic frameworks (MOFs), MIL-47(as) has been fabricated by a simple one-pot hydrothermal reaction and characterized by a variety of means, such as X-ray diffraction, Fourier transform infrared spectroscopy, micro-morphology analysis, X-ray photoelectron spectroscopy and specific surface area and pore size distribution. The as-prepared MOFs were found to be an effective material for the selective electrochemical detection of microgram levels of Pb(II), Cu(II) and Hg(II) in aqueous solution performed by differential pulse voltammetry. The electrochemical properties and applications of the modified electrode were also studied, in which operational parameters such as pH, deposition potential, and deposition time, were optimized to detect trace amounts of Pb(II), Cu(II) and Hg(II) ions. The as-prepared electrode not only has good stability and repeatability, but also has good practical detection ability.
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JOURNAL OF POROUS MATERIALS
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2020
·Vol. 28
·期 1
·299-310
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IF 2.183
Ma Zixuan,Li Fang,Jia Aizhong,Zhang Xiao,Wang Yanji
The highly efficient adsorbents with fast adsorption rate, high adsorption capacity and selectivity as well as good reusability were successfully synthesized through fabricating 3D spherical-chain porous silica material and grafting modification with ethylenediaminetetraacetic acid (EDTA) for the selective removal Cu(II) from wastewater. The obtained adsorbents were characterized by XRD, FT-IR, SEM, TEM, XPS, N 2 adsorption–desorption and back titration. The results indicate that the 3D framework structure is adjustable in a certain range by varying the parameters of the synthesis system. And the adsorption performance of the materials was investigated under different conditions such as pH, contact time and initial metal ions concentration. Under the experiment conditions, the synthesized adsorbent is efficient in removing Cu(II) and the adsorption equilibrium could be achieved within only 5 min, and the kinetic data are well fitted by pseudo-second-order and Langmuir isotherm models. The prepared adsorbents display good selective adsorption of Cu(II) and can be feasibly regenerated without evident decrease even after five recycles. Basing on the obtained results, the plausible adsorption mechanism was proposed and analyzed.
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Journal of Cleaner Production
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2020
·
IF 7.246
Dezhi Zhao,Zheng Wang,Shuang Lu,Xianming Shi
Eco-friendly adsorbents for removing heavy metals from wastewater are urgently needed. This work fabricated an amidoxime-modified polypropylene (PP) fiber as a cost-effective and recyclable adsorbent to remove heavy metals. The laboratory study aimed to evaluate the competitive adsorption of Cu(II), Pb(II) and Zn(II) onto AO-PP fiber in aqueous solutions. The adsorption isothermal data fitted the Langmuir isotherm well, and the maximum adsorption capacities (mg/g) were in the order of Cu (47.23)>Pb (45.64)>Zn (37.78) when applying the Langmuir isotherm at pH 5.0. Adsorption equilibrium could be reached within 90 min. The adsorption was pH-dependent and followed the pseudo-second-order model well. The adsorption can be explained by the coordination between N- and O-containing groups and the metallic ions. Metallic ion affinity, steric hindrance , and covalent index were the main factors affecting the competitive adsorption behavior. Regeneration experiments revealed that the obtained adsorbent maintained favorable adsorption capacity even after 20 cycles. Cement mortars incorporating the metal-adsorbed fiber exhibited improved mechanical properties and satisfactory leaching performance. This work experimentally validated the effective use of AO-PP fiber to capture heavy metals from wastewater as well as subsequent sequestration of the recycled fibers in a suitable material matrix , providing a new reference for heavy metal harvesting and final disposal.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2020
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IF 5.162
Wei Wei,Xuan Han,Mengjia Zhang,Yong Zhang,Yong Zhang,Chunmiao Zheng
Humic acid (HA) is well-known for its chelating activity towards various contaminants, but it dissolves in water thus cannot be used alone as an adsorbent. By immobilizing HA to the surface of nano-hydroxyapatite (nHAP), a novel HA-nHAP adsorbent was prepared. The composition and surface morphology of the obtained HA-nHAP composite were studied in detail. Adsorptive removal of Cu(II) and Methylene blue (MB) using HA-nHAP in single and binary systems were investigated. Results indicated that HA-nHAP exhibited efficient removal of Cu(II) and MB with a favorable adsorption at higher pH. The mechanisms involved in adsorption of Cu(II) and MB were electrostatic interaction and surface complexation. Optimization study using central composite design (CCD) based response surface methodology (RSM) was performed and 3-D response surfaces were plotted from the mathematical model. The optimum conditions were found to be 2.2 g/L (adsorbent dosage), 8 h (contact time), 25 mg/L (initial Cu(II) concentration), and 85 mg/L (initial MB concentration). At optimum conditions, removal rates of Cu(II) and MB were 97.68% and 100%, respectively. The adsorption kinetics and equilibrium fitted well with Elovich and Langmuir models, respectively. Desorption studies confirmed that HA-nHAP adsorbent could be effectively regenerated and reused.
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高影响因子
CARBOHYDRATE POLYMERS
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2020
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IF 7.182
Qi Wu,Hui He,Hang Zhou,Fei Xue,Hongxiang Zhu,Shile Zhou,Lei Wang,Shuangfei Wang
A novel multiple active sites cellulose-based adsorbent (MCC/TEPAA-BCTTC) with a high density of multiple active adsorption sites (N, O, S) was prepared by using epichlorohydrin cross-linking microcrystalline cellulose (MCC) with tetraethylenepentamine (TEPA), followed by grafting with bis(carboxymethyl) trithiocarbonate (BCTTC). It was shown that the removal rates of MCC/TEPAA-BCTTC for Pb(II) (1 mg/L), Cu(II) (3 mg/L) and Cr(VI) (1 mg/L) reached 100 %, 98 % and 99 %, respectively, and the remaining concentration after adsorption reached the United States Environmental Protection Agency (US EPA) standards for Pb(II) and Cu(II) and the China integrated wastewater discharge standard for Cr(VI). These results indicate that the high removal rate of MCC/TEPAA-BCTTC for removing anionic and cationic heavy metal ions in low-concentration mixed heavy metal ions environments was mainly due to the high density of multiple adsorption sites that act via multiple cooperative mechanisms.
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BIORESOURCE TECHNOLOGY
·
2019
·
IF 6.669
Jianhong Ma,Tong Li,Yutang Liu,Tao Cai,Yuanfeng Wei,Wanyue Dong,Hui Chen
In this study, lignin extracted from rice husk was used to synthesis double network hydrogel adsorbent, named RH-CTS/PAM gel. RH-CTS/PAM gel exhibited macroporous structure and high buried water content, which gave rise to the exceptional adsorption performance. As results, in individual systems, the equilibrium time of Pb(II), Cu(II) and Cd(II) with initial concentration of 200 mg/L could be reached within 10 min, with the theoretical maximum adsorption capacity of 374.32, 196.68 and 268.98 mg/g, respectively. The adsorption rate and capacity of Pb(II), Cu(II) and Cd(II) in multicomponent systems were lower than that of individual systems. However, in a few cases of ternary system, higher adsorption rate and capacity was observed compare to binary systems. Adsorption mechanism indicated that both oxygen-containing and nitrogen-containing functional groups played a dominant role during the adsorption process, and mainly through chemical interaction along with a small amount of physical interaction.
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高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2017
·
IF 4.421
Hengjia Zhu,Jianming Pan,Jun Cao,Yue Ma,Fengxian Qiu,Wenli Zhang,Yongsheng Yan
Herein we reported a facile method to prepare porous ion/molecule imprinted polymers (I-MIPs) via twice imprinting strategy for the simultaneous uptake of copper ions (Cu(II)) and λ-cyhalothrin (LC). Firstly, N -(β-aminoethyl)-γ-aminopropytrimethoxysilane (DAMO) was grafted on silica particles surface to synthesis Cu(II)-imprinted polymers to introduce iron imprinted sites. They were then utilized as stabilizers to prepare a stable W/O Pickering HIPEs template (LC as the imprinting molecule), which was then polymerized with dual imprinting sites including Cu(II) and LC. The adsorption equilibrium, kinetic results and selective recognition experiments were exhibited their prospected dual selectivity and simultaneous removal of LC and Cu(II).
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TALANTA
·
2015
·
IF 3.545
Maofang He,Chaozhan Wang,Yinmao Wei
In this paper, iminodiacetic acid-Cu(II) functionalized Fe 3 O 4 @SiO 2 magnetic nanoparticles were prepared and used as new adsorbents for magnetic solid phase extraction (MSPE) of six monoamine neurotransmitters (MNTs) from rabbit plasma. The selective enrichment of MNTs at pH 5.0 was motivated by the specific coordination interaction between amino groups of MNTs and the immobilized Cu(II). The employed weak acidic extraction condition avoided the oxidation of MNTs, and thus facilitated operation and ensured higher recoveries. Under optimal conditions, the recoveries of six MNTs from rabbit plasma were in the range of 83.9–109.4%, with RSD of 2.0–10.0%. When coupled the Cu(II) immobilized MSPE with high-performance liquid chromatography-fluorescence detection, the method exhibited relatively lower detection limits than the previously reported methods, and the method was successfully used to determine the endogenous MNTs in rabbit plasma. The proposed method has potential application for the determination of MNTs in biological samples. Also, the utilization of coordination interaction to improve the selectivity might open another way to selectively enrich small alkaloids from complex samples.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·Vol. 49
·期 24
·10338-10356
·
IF 2.5
Fan Bai,Yanjiao Gao,Yongbo Xiao,Jingyi Yang,Jiaxin Chen,Jing Xiao
In recent years, advanced oxidation based on periodate (PI) has become a research focus for disposal of recalcitrant organics from water due to its efficient oxidizing ability. This study systematically investigated the degradation of reactive black 5 (RB5) by the Cu(II)-activated sodium periodate (NaIO4, SPI) system. The optimal reaction conditions were determined via Box–Behnken response surface methodology as [Cu(II)] = 1.013 ± 0.021 g L−1, [SPI] = 45 ± 2 μM, and pH = 5.7 ± 0.3, achieving a RB5 removal rate of 91.98% (R2 = 0.9901, prediction error <1%). The free radical quenching experiment confirmed that the dominant ROS in the system were ˙OH, 1O2, and IO3˙, and their contribution was IO3˙ > 1O2 > ˙OH. The coexistence anion experiments showed that Cl− (0.1–5.0 mM) and SO42− (0.1–5.0 mM) had almost no effect on the RB5 degradation efficiency, with inhibition rates lower than 1.99% and 3.58%, respectively, while CO32− (1.0 mM) and HCO3− (1.0 mM) led to a decrease of 20.8% and 14.17% in the RB5 degradation rate. In the presence of HA, the degradation efficiency of RB5 was maintained at 89.88–92.66%. The system maintained a removal rate of 73.33–87.66% for RB5 in the simulated actual water bodies (tap water/river water/brewery wastewater). Energy-assisted experiments showed that the activation energy of the reaction was significantly reduced and the kobs values were increased by 10.3 times when the temperature was increased to 40 °C, and the reaction time could be shortened to 2 min (removal rate >98%) after ultraviolet (365 nm, 20 W) coupling. In summary, this study is expected to support the related PI-based advanced oxidation process in stubborn pollutant treatment.
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