JOURNAL OF HAZARDOUS MATERIALS
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2019
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IF 7.65
Shuai Tang,Lujian Lin,Xuesong Wang,Anxin Feng,Anqi Yu
Both heavy metals and microplastic pollutants are ubiquitous in the aquatic environment. The uptake of lead(II) ions from aqueous solutions onto aged nylon microplastics was investigated as a function of pH, contact time, temperature, supporting electrolyte concentration and fulvic acid concentration in batch studies. The effect of surface properties on the adsorption behavior of lead(II) was investigated with scanning electron microscope equipped with the energy dispersive X-ray spectroscope (SEM-EDAX), Fourier transform-infrared (FTIR) spectroscopy, thermal gravimetric analysis (TGA), X-ray diffraction (XRD) and differential scanning calorimetric (DSC). The adsorption kinetics conformed to the pseudo-second order equation, Elovich equation and intraparticle diffusion model well. The experimental data of the adsorption process was fitted to the Langmuir and Freundlich adsorption isotherms and the parameters were estimated. The lead(II) uptake on aged nylon microplastics was spontaneous and endothermic in nature. The lead(II) adsorption was significantly dependent on the sodium chloride concentrations, initial solution pH and fulvic acid concentrations. Results of this study highlight the importance of surface carboxyl function group of aged nylon microplastics in controlling lead(II) adsorption.
研究领域:
环境科学
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化学
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PubMed
高影响因子
Nanoscale Research Letters
·
2015
·Vol. 10
·期 1
·1-9
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IF 2.779
Qi Yun,Jiang Meng,Cui Yuan-Lu,Zhao Lin,Zhou Xia
Pb(II) is a representative heavy metal in industrial wastewater, which may frequently cause serious hazard to living organisms. In this study, comparative studies between alginate nanoparticles (AN) and quercetin-decorated alginate nanoparticles (Q-AN) were investigated for Pb(II) ion adsorption. Characterization of AN and Q-AN were analysed by transmission electron microscopy (TEM), Fourier transform infrared spectrometry (FT-IR), X-ray diffractometer (XRD), and thermogravimetric analysis (TG-DTG-DSC). The main operating conditions such as pH, initial concentration of Pb(II), and co-existing metal ions were also investigated using a batch experiment. AN and Q-AN, with a diameter of 95.06 and 58.23 nm, were constituted by many small primary nanoparticles. It revealed that when initial concentration of Pb(II) is between 250 and 1250 mg L −1 , the adsorption rate and equilibrium adsorption were increased with the increase of pH from 2 to 7. The maximum adsorption capacities of 147.02 and 140.37 mg L −1 were achieved by AN and Q-AN, respectively, with 0.2 g adsorbents in 1000 mg L −1 Pb(II) at pH 7. The adsorption rate of Pb(II) was little influenced by the co-existing metal ions, such as Mn(II), Co(II), and Cd(II). Desorption experiments showed that Q-AN possessed a higher desorption rate than AN, which were 90.07 and 83.26 %, respectively. AN and Q-AN would probably be applied as adsorbents to remove Pb(II) and then recover it from wastewater for the advantages of simple preparation, high adsorption capacity, and recyclability.
研究领域:
环境科学
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材料科学
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高影响因子
Journal of Environmental Chemical Engineering
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2022
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IF 7.968
Shenyi Jiang,Shuang Li,Pingbo Zhang,Hongyan Miao,Pingping Jiang,Yan Leng
Melamine sponge (MS) with open three-dimensional porous structure is regarded to be an ideal substrate to prepare monolithic adsorbents for heavy metal ions removal. However, most of the existing surface modification strategies of MS are still difficult to achieve a satisfactory adsorption ability for Pb(II). In this study, tannic acid (TA) and polyethyleneimine (PEI) were alternatively deposited on the framework of MS via layer-by-layer covalent assembly between polyphenols of TA and amine groups of PEI. The morphology, molecular structure, and overall properties of the obtained multilayer-decorated MS materials (PEI-TA) n -MS were characterized using SEM, XPS, FT-IR, and TGA . (PEI-TA) 2 -MS was demonstrated to be extremely stable and exhibited excellent adsorption behavior for Pb(II). The maximum Pb(II) adsorption capacity reached 257.4 mg/g at pH value of 5.0 and initial Pb(II) concentration of 200 mg/L. It is better than those of previous reported PEI-based adsorbents under similar conditions. The kinetic and isotherm data revealed that such process is exothermic, and well fits the Langmuir isotherm and the pseudo-second-order kinetic models. The present PEI-TA-based layer-by-layer assembly strategy may offer new prospects for the versatile design of other monolithic adsorbent materials.
研究领域:
环境科学
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材料科学
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化学工程
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DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2021
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IF 10.588
Yaoyao Huang,Huaili Zheng,Xuebin Hu,Yuyang Wu,Xiaohui Tang,Qiang He,Shangyu Peng
Simultaneously removing heavy metal and dye from complex wastewater is of great significance to industrial wastewater treatment . Herein, a novel magnetic adsorbent, DTPA-modified chitosan-coated magnetic silica nanoparticle (FFO@Sil@Chi-DTPA), was successfully prepared and used to enhance the Pb(II) selective adsorption from multi-metal wastewater based on anion-synergism. In the competitive experiment conducted in a multi-ion solution, the type of selective adsorption of metals was changed by the adsorbents before and after amidation, in which FFO@Sil@Chi-DTPA exhibited an excellent selectively for capturing Pb(II), while FFO@Sil@Chi demonstrated highly selective adsorption of silver. More importantly, the selective adsorption of Pb(II)S by FFO@Sil@Chi-DTPA was enhanced from 111.71 to 268.01 mg g −1 when the coexisting MB concentrations ranged from 0 to 100 mg L −1 at pH 6.0. In the Pb(II)-MB binary system, Pb(II) and MB exhibited a synergistic effect, in which the presence of MB strengthened the adsorption effect of Pb(II) due to the sulfonic acid groups in MB molecules that create new specific sites for Pb(II) adsorption, while MB adsorption was also enhanced by the presence of Pb(II). This work provides a new strategy for exploring novel adsorbents that can enhance the selective removal of heavy metal in complex wastewater based on anion-synergism.
研究领域:
环境科学
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材料科学
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化学工程
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高影响因子
CHEMICAL ENGINEERING SCIENCE
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2025
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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.
研究领域:
环境科学
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材料科学
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污染控制
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水处理技术
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吸附材料
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重金属去除
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功能材料
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DOI
高影响因子
CHEMICAL PHYSICS LETTERS
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2025
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IF 3.1
Haodong Wang,Yao Feng,Chaoqun Mu,Zhixian He,Lvling Zhong,Liang Zhang
Thermo-responsive materials represent a novel class of functional materials capable of reversible swelling, contraction, or phase transition in response to environmental temperature changes, demonstrating vast potential in environmental remediation. This study successfully synthesized a composite hydrogel with interpenetrating network structure, using sodium alginate (SA) and sodium carboxymethyl cellulose (CMC) as the matrix, and incorporating the thermo-sensitive polymer poly(N-isopropylacrylamide) (PNIPAM). The SCP composite gel enables controlled adsorption and release of Pb(II) through temperature-dependent regulation of surface hydrophilicity. At lower temperatures, hydrophilic groups are exposed on the material surface, resulting in a high Pb(II) adsorption capacity of up to 311 mg g −1 . When the temperature exceeds the lower critical solution temperature (LCST), a conformational transition occurs, leading to the concealment of hydrophilic groups and subsequent release of adsorbed Pb(II). This tunable approach ensures superior regeneration performance of the material. The reliability of the experimental data was further validated by fitting with isothermal adsorption models and kinetic models. This study has shown that SCP composite hydrogel is a cost-effective and highly efficient adsorbent for Pb(II), holding significant application value in the treatment of heavy metal wastewater.
研究领域:
环境修复
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功能高分子材料
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重金属污染治理
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吸附动力学
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水处理技术
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Sheng Cai,Yirong Zhang,Zhi ming Liu,Luming Tian,Deliang He,Ruirui Zhu,Yan Xing
In this study, a novel carbon aerogel adsorbent (Mn-PA-CS) was synthesized through a one-step calcination-activation method using manganese acetate as the precursor. Unlike conventional phytic acid-activated carbons, this work introduces manganese doping as an effective strategy to tailor the pore structure and surface chemistry. The resulting material features enriched surface P/O functional groups and a significantly increased proportion of micropores (0.7–0.8 nm), which closely match the hydration diameter of Pb(II) ions, alongside elevated defect density (ID/IG = 0.94). These modifications synergistically promote adsorption through micropore filling, electrostatic attraction, and surface complexation. The optimized Mn-PA-CS, prepared with 100 mg of manganese acetate, exhibited a high Pb(II) uptake capacity of 302.88 mg·g -1 , which represents a 132.43% improvement compared to the undoped material. The adsorption behavior followed pseudo-second-order kinetics and the Freundlich isotherm, suggesting a spontaneous, endothermic, and multilayer chemisorption process. This study indicates that transition metal doping is a promising strategy for regulating the adsorption performance of bio-derived carbon materials.
研究领域:
环境科学
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材料科学
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化学工程
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水处理技术
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高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2019
·Vol. 26
·期 32
·33427-33439
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IF 2.914
Wang Zongwu,Wu Qing,Zhang Jing,Zhang Huan,Feng Jinglan,Dong Shuying,Sun Jianhui
The efficient removal of heavy metals from aqueous environment is imperative and challenging. A novel ternary composite constructed of diaminopyridine polymers, graphene oxide, and ferrite magnetic nanoparticles was designed by a facile in situ polymerization strategy for the removal of Pb(II) from aqueous solution. Detailed characterization of morphological, chemical, and magnetic properties was employed systematically to confirm the formation of the composite material. Batch adsorption experiment studies suggested that the composite was an excellent adsorbent for Pb(II) which was easily collected after use via exposure to an external magnetic field for 30 s. The effects of different parameters such as solution pH, adsorbent dosage, contact time, initial Pb(II) concentration, temperature, and co-existing ions were examined. The maximum adsorption capacity at pH = 5 was estimated to be 387.2 mg g −1 at 298 K by the Langmuir isotherm model, accompanied by favorable adsorption recyclability according to the investigation of regeneration experiments. Thermodynamic studies revealed that the Pb(II) adsorption via our ternary composite was endothermic and spontaneous. The corresponding removal performance for effluent containing Pb(II) from the battery industry was successfully examined. The present results indicated that our designed adsorbent is beneficial to the practical Pb(II) removal in wastewater purification.
研究领域:
环境科学
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材料科学
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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
危险品化学品经营许可证（带存储）