COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Xuejiao Liu,Beibei Pan,Zhiwei Li,Poonnawit Hanphaiboon,Yin Wang
Activated carbon supported nanoscale zero-valent iron (NZVI/AC) has been proved to be versatile for removing several kinds of contaminants from environmental matrix. The structural properties of NZVI/AC composites play a crucial role in determining both the decontamination efficiency and adsorption capacity of these materials. However, studies relevant to structural evolution and corresponding manipulation routes for AC-supported NZVI are still scarce. Herein, AC-supported NZVI were prepared under different synthesis conditions followed by characterizing them using several techniques and evaluating their reactivity toward heavy metal in aqueous solution. NZVI/AC synthesized under different molecular weight of PEG and m AC :m Fe possessed a similar removal efficiencies of Pb(II) from aqueous solution, meanwhile, NZVI/AC synthesized with a suitably prolonged time at n BH4 :n Fe = 8.0 exhibited obvious enhancement for Pb(II) removal from aqueous solution. As for structural evolution of AC-supported NZVI, results show that the crystallization was more complete, the shape was converted from needle to sphere, the particle size was becoming smaller, the particle distribution was more homogeneous, the specific surface area was smaller, and the surface oxidation was lower as suitably increasing m AC :m Fe , n BH4 :n Fe , and reaction time. The size and density of iron precursor by complexation of PEG and Fe 2+ , and ratio of nuclei formation to growth values are essentially responsible for manipulating structure of AC-supported NZVI. Spherical AC-supported NZVI with higher iron content based on smaller particle size, uniform distribution, and lower surface oxidation in one is responsible for significant enhancement of Pb(II) removal rate and capacity thanks to higher surface reactivity, more accessible surface-active sites, and faster electron transfer from core to shell of iron. This study would provide a new insight into comprehending manipulation mechanism for the key structure of AC-supported NZVI composites for aquatic remediation.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Xiaoxiao Yu,Yuanhong Tang,Tong Shao,Xiaohan Xu,Hong Xiao,Xiaojing Wang,Hong Peng,Xiaohui Lu,Shihuai Deng,Gang Yang,Yanzong Zhang,Zhenxing Zeng
The selective removal of highly toxic heavy metal ion Pb(II) from wastewater is of significant importance to the ecological environment and human health, while the development of high performance adsorbents for selective Pb(II) adsorption remains a big challenge. Herein, a cleverly designed heavy metal adsorbent over potassium and cyano modified carbon nitride (KCCN) is proposed, exhibiting excellent performance toward Pb(II) selective removal. The amino and cyano groups in KCCN are found high affinity to that of Pb(II) in such a potassium doped system, as a result showing an excellent Pb(II) selective adsorption performance in the presence of various ions without obviously changing the distribution coefficient K d value. In addition, the adsorption process is found to follow the Langmuir isotherm model and pseudo-second-order kinetic, with a maximum adsorption capacity for Pb(Ⅱ) of 293.26 mg/g. Furthermore, no obvious adsorption capacity drop is found after five cycles of Pb(II) adsorption processes, demonstrating the high reusability on Pb(II) removal.
✓ 已验证
产品关联
DOI
高影响因子
BIOLOGICAL TRACE ELEMENT RESEARCH
·
2024
·
IF 3.4
Wu Shihao,Zhao Peng,Wang Aihua,Dong Linpei,Wu Xiaojun,Wang Jifen,Zhang Yunfeng
Monochromatic excitation X-ray fluorescence (ME-XRF) spectrometry emerges as a novel technique in trace element analysis, distinguished by its simplicity, rapidity, and efficiency. Its application in forensic toxicology has grown significantly for identifying toxic trace metals in biological samples. This study further expands its utility by developing a method for the rapid determination of arsenic (As), mercury (Hg), thallium (Tl), and lead (Pb) in hair samples. Calibration curves were established using analytical reference samples, and optimal detection conditions were determined and validated. The LODs for As, Hg, Tl, and Pb were 0.03, 0.03, 0.03, and 0.05 μg g −1 , respectively. Method precision was evaluated through seven parallel analyses of samples within the concentration range of 0.27 to 20.051 μg g⁻ 1 , with relative standard deviations (RSDs) consistently below 10%. The feasibility of the ME-XRF technique for forensic toxicology analysis was validated through the analysis of authentic poisoned hair samples collected from the animal experiment.
✓ 已验证
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Xinglu Jiang,Yiwu. Qin,Jun Zhou,Wenjin Chen,Beibei Xie,Hailun Zhou,Kangjing Li,Chunyun Liang,Cong Liu,Ao Long,Shufang Zhuo,Yigeng Liu,Fengyuan Zhou
As exposed to heavy metals, they can bind to biomacromolecules and damage these molecular structures, thereby seriously threatening human's health，for example. Hence, to study the mechanism of interaction between heavy metals and biomacromolecules plays an important role in protecting human health from heavy metal hazards. Here, ssDNA and E. coli lysates were severed as biomacromolecules to analyze their molecular structure changes as exposed to gold (Au) ion and other heavy metal ions, such as Pb 2 + , Cd 2+ , Cr 2+ and Hg 2+ . Gold nanoparticles coated by E. coli lysates (ECL-Au NPs) have been produced in the process of reducing the toxicity of Au(III) by E. coli lysates. As simultaneously exposed to heavy metal ions and sunlight, Au(III) ion can be generated from ECL-Au NPs to rapidly cleave DNA through cycling between Au(0) and Au(III). Meanwhile, the electron transfers also occur in the biomacromolecules from E. coli lysates, and it must cause their structure destruction as well. In conclusion, as exposed to multiple heavy metals, sunlight can enhance the synergetic damage of biomacromolecules by heavy metals. This study provides not only a new tool for DNA cleavage, but also a new mechanism of DNA and proteins damage caused by heavy metal pollution.
✓ 已验证
DOI
高影响因子
Journal of Cleaner Production
·
2025
·
IF 10
Zhanqi Liu,Manyu Zhang,Shuo Wang,Hui Qiu,Yaran Song,Qina Sun,Tifeng Jiao,Qingrui Zhang
Heavy metal contamination in industrial wastewater, particularly lead (Pb(II)), poses significant environmental and health challenges. Conventional membrane technologies, like nanofiltration and ultrafiltration, struggle with selectivity and separation recovery in complex wastewater streams. To address this, we present an advanced metal-phenolic network (MPN) membrane that leverages the tunable coordination chemistry of Tannic Acid (TA) and metal complexes to address these limitations. The TA-MPN membrane demonstrates exceptional performance, achieving 6–15 times higher selectivity for Pb(II) than commercial polyamide membranes, even in the presence of competing ions such as Cd(II), Zn(II), Cr(VI) and Ni(II). In electroplating wastewater applications, the membrane reduces Pb(II) levels to below 0.1 mg/L with a capacity of 80 L/m 2 and removal efficiency exceeding 95 %, meeting stringent GB21900-2008 standards. Furthermore, the membrane exhibits outstanding regenerability, maintaining consistent performance over 10 regeneration cycles using extremely low doses of 0.1 % HCl. An economic analysis reveals a preparation cost of 22.6 USD/m 2 and a treatment cost of 0.227 USD per ton of wastewater, demonstrating its cost-effectiveness. The findings establish the TA-MPN membrane as a scientifically robust solution for selective and cost-effective Pb(II) remediation and recovery, effectively addressing the limitations of conventional membranes while advancing scalable and sustainable technologies for heavy metal treatment.
✓ 已验证
DOI
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Dongfang Wang,Jie Wu,Ruohan Li,Xianghai Kong,Pan Zhao,Yanping Zhu,Zerong Song,Jinjing Xu,Ziyu You,Yuhao Wang,Qingchuan Wu,Dongqing Cai
White pollution, excessive heavy metals, and fertilizer leaching have become key issues restricting the development of agriculture. In this work, we prepared multifunctional starch mulch film (SMF/MAP/FeS) by loading ferrous sulfide (FeS) and monoammonium phosphate (MAP) onto commercial starch mulch film using poly(vinyl alcohol) for bonding. The removal efficiencies of Pb(II)/Cr(VI) for SMF/MAP/FeS could reach 97% and 93% in the aqueous solution. The adsorption isotherm, thermodynamic, and kinetics studies indicated that the adsorption process was an endothermic multimolecular-layer chemisorption. The main removal mechanisms for Pb(II)/Cr(VI) of SMF/MAP/FeS were precipitation and redox reactions. In addition, SMF/MAP/FeS not only possessed great thermal insulation and moisturizing properties but also could realize the slow release of NH4+. Furthermore, the maximum release rate of NH4+ for SMF/MAP/FeS could reach 93.4% during Pb(II)/Cr(VI) removal. At the same time, SMF/MAP/FeS has a good degradability at 50 d. A pot experiment indicated that SMF/MAP/FeS had a detoxifying effect on the Pb(II)/Cr(VI)-contaminated soil to promote the growth of pakchoi. Therefore, this study not only solves the problem of plastic and heavy metal pollution but also realizes the slow release of nutrients.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Desalination and Water Treatment
·
2025
·
IF 1
Jingyi Chen,Xiaoxue Zhang,Junsheng Liu,Shan Jiang,Chunyu Ji,Jie Zhang
A series of novel polyethyleneimine/graphene oxide (PEI@GO) membranes were prepared and their adsorptions for heavy metal ions in mixed solutions were examined. It was found that they had good sorption performances for Pb(II), Cu(II), and Zn(II) in water. Their adsorptions for Pb(II), Cu(II), and Zn(II) obeyed the first-order kinetic modeling, dominating a physical style. Meanwhile, the fitting of intra-particle diffusion showed that Pb(II) and Cu(II) did not conform to the intra-particle diffusion stage, whereas Zn(II) did. Moreover, it was confirmed that the sorption of PEI@GO membranes for Pb(II), Cu(II), and Zn(II) followed the Langmuir isotherm modeling, and the maximal values could reach 79.6 mg/g for Pb(II), 35.01 mg/g for Cu(II), and 32.27 mg/g for Zn(II), respectively. The calculation of thermodynamic parameters indicated that these adsorptions were spontaneous and endothermic processes. Further, the investigation of PEI@GO membranes for Pb(II), Cu(II), and Zn(II) in ternary mixed systems evidenced that Zn(II) can be preferentially removed via step-by-step mode. In addition, the exploration of sorption mechanism using XPS and FTIR analyses showed that ligand interactions were involved in the adsorptive removal of Pb(II), Cu(II), and Zn(II). This study discloses that PEI@GO membranes are promising adsorbents for the removal of heavy metal ions from water.
✓ 已验证
产品关联
DOI
高影响因子
WASTE MANAGEMENT & RESEARCH
·
2024
·
IF 3.7
Yan Zhou,Wenhui Liu,Dandan Chen,Bangwei Liu,Ping Lu,Yiwei Zhang
A novel Fe/Ca-modified biochar (BC) derived from corn stalk was prepared in this study for the simultaneous adsorption and immobilization of arsenic, cadmium and lead in aqueous solution and soil, respectively. The adsorption experiment in aqueous solution indicated that 1Ca-Fe@BC exhibited excellent removal efficiency (R, %) towards arsenic (46.3%), cadmium (76.3%) and lead (93.6%). The presence of cadmium and lead could enhance the adsorption efficiency of arsenic by facilitating the formation of ternary complexes with it. Moreover, both cooperative and competitive effects occurred between cadmium and lead adsorption. When the distribution coefficient of cadmium and lead was equimolar, cooperative adsorption prevailed. However, when the distribution coefficient deviated from this balance, competitive adsorption dominated with a higher affinity for lead. The soil culture experiment demonstrated that the utilization of 1Ca-Fe@BC could enhance the stability of arsenic, cadmium and lead in soil by enhancing soil cation exchange capacity and pH while reducing dissolved organic carbon. The competitive and cooperative effects of arsenic, cadmium and lead in soil were consistent with those found in aqueous solution. The results showed that 1Ca-Fe@BC exhibited an excellent remediation efficiency for both arsenic, cadmium and lead-contaminated aqueous solution and soil.
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 20
·1-10
·
IF 2.8
Liu Hao,Wang Yiping,Wang Jiakang,Yang Ying,Liu Huihui,Wu Jintao,Zhang Jiyang
Temperature stability of the piezoelectric ceramics is critical to its performance in high-power devices. In this research, 5 mol% BiScO 3 (BS) is introduced into 0.05Pb(Mn 1/3 Sb 2/3 )O 3 –Pb(Zr 1− x Ti x )O 3 system. The morphotropic phase boundary (MPB) has been re-located by shifting Zr/Ti ratio systematically for the piezoceramic. Optimal piezoelectric properties with piezoelectric coefficient d 33 of 341 pC/N, electromechanical coupling factor ( k p ) of 0.51, and mechanical quality factor Q m value of 859 are obtained in MPB compositions of 0.05BiScO 3 –0.05Pb(Mn 1/3 Sb 2/3 )O 3 –0.9Pb(Zr 45.5 Ti 54.5 )O 3 ceramic at room temperature. Furthermore, the addition of BiScO 3 effects profoundly on the temperature dependence of the piezoelectric and ferroelectric properties. Comparing to common Pb(Zr, Ti)O 3 -based piezoceramic, the BS-doped ceramic presents elevating ferroelectric polarization with temperature up to 200 °C, as well as stabilized d 33 , k p , and Q m values from room temperature to 120 °C.
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Xuan Zhou,Can Jin,Guifeng Liu,Guomin Wu,Shuping Huo,Zhenwu Kong
With the increasing concern in sustainable development and environmental governance, the biomass-based magnetic materials containing sufficient active sites and regular structure can be regarded as the high-performance adsorbents for removal of heavy metal pollutants from wastewater. In this study, we reported the tunable covalent binding of lignin onto amine-functionalized magnetic nanoparticles (AMNP) using cyanuric chloride as a chemoselective cross-linker. The chemical structures, morphologies, and magnetic properties of the synthesized lignin-based magnetic adsorbents (L1@MNP and L2@MNP) were comprehensively characterized. Batch adsorption experiments were conducted to investigate various effecting factors, including pH, contact time, solution concentration and temperature. With the higher component ratio of AMNP/lignin, L1@MNP displayed higher adsorption affinity ( q max = 111.23 mg/g) and selectivity towards Pb(II) than L2@MNP ( q max = 81.97 mg/g). The adsorption kinetics agreed well with the pseudo-second-order kinetic model, and the thermodynamic adsorption behaviors were found to be an endothermic and spontaneous process. In addition, the presence of magnetic cores in the network facilitated the fast recovery of both two magnetic adsorbents after the adsorption process, owing to the good superparamagnetic properties for L1@MNP (40.06 emu/g) and L2@MNP (26.95 emu/g). Furthermore, the core–shell magnetic adsorbents also showed superior stability even in an acidic solution, of which the removal efficiency could well maintain over 85% after 5 cycles. This work provides a facile strategy for the design and synthesis of lignin-based adsorbents with flexible nanoparticles as a building block for the potential application prospects in Pb(II) removal from wastewater.
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Jianzhi Huang,Xinrong Guo,Xinjian Huang,Lishi Wang
Herein, mesoporous hollow kapok-tubes (denoted as MHKTs) is first used as carbon electrocatalyst for CO 2 electroreduction that can selectively convert CO 2 to formate without doping active elements, achieving the highest Faradaic Efficiency (FE) for formate at a potential range from −1.0 to −1.1 V vs. RHE (E = −1.0 V, FE = 48%; E = −1.1 V, FE = 50%). Moreover, MHKTs is also first used as new carbon support for loading metals in CO 2 electroreduction, metals (Sn, Bi, Pb and Cd) in-situ anchored on MHKTs are all prepared via in-situ simple one-pot synthetic strategy. The four electrocatalysts Sn@MHKTs (E = −0.9 V, FE = 94%; E = −1.0 V, FE = 95%; E = −1.1 V, FE = 90%), Bi@MHKTs (E = −0.9 V, FE = 90.5%; E = −1.0 V, FE = 93%; E = −1.1 V, FE = 92%), Pb@MHKTs (E = −1.0 V, FE = 85%; E = −1.1 V, FE = 80%) and Cd@MHKTs (E = −0.9 V, FE = 71%; E = −1.0 V, FE = 74%; E = −1.1 V, FE = 70%) all exhibit high selectivity for electrocatalytic CO 2 to formate at a wide potential range with low overpotential and high current density , respectively outperforming electrocatalysts synthesized under the same conditions that use traditional MWCNTs and rGO as carbon support (Sn@MWCNTs, Bi@MWCNTs, Pb@MWCNTs, Cd@MWCNTs; Sn@rGO, Bi@rGO, Pb@rGO, Cd@rGO). These outstanding performances of low cost metal@MHKTs electrocatalysts display great potential for large-scale using in CO 2 -to-formate process.
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Xiaolu Fan,Xue Wu,Xinzi Wang,Lei Zheng,Yunpeng Liu,Dayi Zhang
Chemical stabilization is frequently used to stabilize lead (Pb) or arsenate (As), but faces challenges in Pb-As co-contaminated soils because of the antagonistic reactions between chemical stabilizers and contaminants. In this work, we innovated an effective and cost-efficient stepwise steam flash heating (SSFH) strategy to simultaneously immobilize Pb and As, and unraveled the underlying mechanisms. The combination of 1.5 % Ca(H 2 PO 4 ) 2 and 2 % Fe 2 (SO 4 ) 3 only decreased 1.99 % Pb by toxicity characteristic leaching procedure (TCLP-Pb) but increased 17.8 % of TCLP-As due to the antagonistic effects. SSFH with Ca(H 2 PO 4 ) 2 in the first step and Fe 2 (SO 4 ) 3 in the second step achieved the minimal TCLP-Pb and TCLP-As of 0.778 and 0.327 mg/L, respectively. It also reduced 69.8 % of leachable As in 100-year acid rain simulation, indicating a favorable long-term stabilization performance. Additionally, SSFH approach reduced 43.2 % stabilizer dosage and 14.9 % cost. X-ray absorption near edge structure (XANES) documented that the stepwise SFH promoted the transformation of Pb(NO 3 ) 2 and NaAsO 2 /NaAsO 3 /As 2 O 3 /As 2 O 5 into stable Pb 3 (PO 4 ) 2 and FeAsO 4 , preventing the formation of AsO 4 3- and FePO 4 . Our findings proved the state-of-the-art SSFH approach and unraveled its mechanisms to stabilize Pb and As co-contamination in soils, offering a green and sustainable remediation alternative for the management of heavy metal contaminated sites. Environmental implication A novel stepwise SFH approach can be applied to overcome the stabilizer antagonist effects by separately immobilizing Pb and As in two sequential steps. It also decreased 43.2 % of stabilizer dosage and 14.9 % of cost comparing to conventional chemical stabilization. This approach can be used for other metal co-contaminated soils facing similar antagonistic challenges, and our work raises a state-of-the-art solution for cost-effective, green and sustainable remediation practices.
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）