E-POLYMERS
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2021
·Vol. 21
·期 1
·590-605
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IF 2.025
Li Zhao,Xianzhi Hu,Futing Zi,Yingmei Liu,Deqiong Hu,Peng Li,Huiling Cheng
In this study, a novel functional monomer N -(1-(2,4-difluorophenyl)-2-(1 H -1,2,4-triazol-1-yl)ethyl)acrylamide (NDTEA) was designed and synthesized, and was used to prepare Ni( ii ) ion-imprinted polymers (Ni( ii )-IIPs). Sixteen kinds of Ni( ii )-IIP (Ni( ii )-IIP 1–16 ) and corresponding non-imprinted polymers (NIP 1–16 ) were prepared by precipitation polymerization method. After optimized condition experiment, Ni( ii )-IIP 5 possessed maximum adsorption capacity and better imprinting factor under optimal experimental conditions which indicated by equilibrium adsorption experiments. The morphology and structural characteristics of Ni( ii )-IIP 5 were characterized by scanning electron microscopy (SEM) and Brunauer–Emmett–Teller (BET). The adsorption selectivity of Ni( ii )-IIP 5 was analyzed by ICP-OES, and the results showed that Ni( ii )-IIP 5 had favorable selectivity recognition ability for Ni( ii ) when Cu( ii ), Co( ii ), and Cd( ii ) are used as competitive ions. The kinetic experiment indicated that the performance of Ni( ii ) adsorption on the surface of Ni( ii )-IIP 5 obeyed the pseudo-first-order model, and adsorption equilibrium was attained after 15 min. Isothermal adsorption process fitted to Langmuir and Freundlich isothermal adsorption models, simultaneously. The results showed that Ni( ii )-IIP 5 prepared by using a new functional monomer had better permeation selectivity and higher affinity for Ni( ii ), which also verified the rationality of the functional monomer design. At the same time, it also provided a broad application prospect for removal of Ni( ii ) in complex samples.
研究领域:
高分子科学
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环境化学
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材料科学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Lanlan Gao,Hong Wang,Yunlei Zhou,Zhipeng Tian,Huanshun Yin,Jun Wang
MXene-based Ti 3 C 2 T X composite aerogels (βCD-MXene-SA) were prepared using thin layers of MXene and sodium alginate (SA) as matrix materials, β-cyclodextrin (β-CD) as surface modifier, and epichlorohydrin as cross-linker. The βCD-MXene-SA was characterized by scanning electron microscopy, X-ray diffraction and Fourier transform infrared (FTIR) spectroscopy, and the results demonstrated that the βCD-MXene-SA had a larger specific surface area and a more developed pore structure. In addition, the maximum adsorption capacity of this βCD-MXene-SA for dibutyl phthalate (DBP) under the optimal adsorption conditions was 25 mg/g. The adsorption kinetics showed that the adsorption process was in good agreement with both kinetic models. The adsorption isotherms were consistent with the Langmuir and Freundlich adsorption isotherm models, suggesting that the adsorption of DBP by βCD-MXene-SA was the result of the combined effect of physisorption and chemisorption. The adsorption process may include monolayer adsorption on homogeneous surfaces and multilayer adsorption on multilayer surfaces. Outside, the ecotoxicological effects of DBP on crops were explored. The results showed that the treated wastewater could promote the growth of green beans, indicating that the toxicity of wastewater was significantly reduced after adsorption treatment.
研究领域:
材料科学
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环境科学
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化学工程
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生态毒理学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2022
·
IF 6.633
Mingyu Liu,Xiaoting Zhang,Runping Han,Lingbo Qu
A novel polyethylenimine/polyacrylonitrile blend membrane (PEI/PAN) was synthesized via crosslinking technology for removing multiple kinds of heavy metals and endocrine disrupting chemicals (EDCs) from aqueous solution including Cu(II), Cr(VI), bisphenol S (BPS), and 2,4-dichlorophenoxyacetic acid (2,4-D) in batch mode. Several characterization techniques were applied to identify the morphological and physicochemical characteristics of the synthesized PEI/PAN. The results show that the maximum adsorption capacities of Cu(II), Cr(VI), BPS, and 2,4-D reach up to 97.6, 136, 318, and 1303 mg/g at pH of 2.50, 4.89, 4.95 and 2.84, respectively, whereas the presence of salinity in the solution has affected the adsorption process. Moreover, the uptake of Cu(II) is more in line with Elovich kinetic model, and the kinetic processes for Cr(VI), BPS and 2,4-D can be described by the pseudo-first-order model. Freundlich model is more suitable for describing the adsorption isotherm behavior of PEI/PAN toward Cu(II) and Cr(VI), and Koble-Corrigan model can describe the adsorptive equilibrium processes for BPS and 2,4-D. Thermodynamic parameters are speculated that these adsorption processes are spontaneous and entropy-increasing, with endothermic processes for elimination of Cu(II), Cr(VI), and 2,4-D, while that of BPS is exothermic. PEI/PAN has possessed good reusability after five reuse cycles and has antibacterial property against gram-positive S. aureus . These adsorption processes may mainly occur due to the complexation for Cu(II), electrostatic force for Cr(VI), hydrogen bonding for BPS, as well as electrostatic attraction and hydrogen bonding for 2,4-D. Therefore, PEI/PAN membrane exhibits great potential to purify the wastewater polluted with heavy metals and EDCs.
研究领域:
环境科学
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材料科学
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水处理
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化学工程
✓ 已验证
DOI
高影响因子
ENERGY & FUELS
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2018
·
IF 3.024
Yang Peng,Xiangjiang Liu,Xun Gong,Xiaomin Li,Yifu Liu,Erwei Leng,Yang Zhang
In this study, three kinds of monocarboxylic acids, formic, acetic, and propionic acids, are first applied to modified microalgae residuals (M1-RD, M2-RD, and M3-RD, respectively) after lipid extraction, aiming to enhance the adsorption capacity and selective binding ability for Hg(II) ions in simulated wastewater. The effect of pH, temperature, and initial Hg(II) concentration was investigated to identify the optimum adsorption conditions. Batch adsorption tests showed that the maximum adsorption efficiency obtained was 96.7% for M1-RD, 91.1% for M2-RD, and 84.4% for M3-RD at pH 4.05 compared to 48.5 and 57.6% for raw and residual microalgae at pH 5.01, respectively. The adsorption capacity of raw, residual, and modified microalgae increased with the increase of the temperature. Langmuir and Freundlich isotherm model tests showed that the maximum equilibrium adsorption capacity among three modified adsorbents reached 63 ± 3 mg/g for M1-RD, in contrast to 17 ± 1 and 25 ± 2 mg/g for raw and residual microalgae, respectively. The characterization of the modified sample by Fourier transform infrared spectroscopy, Brunauer–Emmett–Teller, and scanning electron microscopy showed that the fibrous structure of the algae was decomposed by carboxyl groups in organic acids involved in microalgae, resulting in a larger surface area and more binding sites. In consideration of ion interference in the actual process, a kind of actual desulfurization wastewater from a 1000 MW coal-fired power plant (Guangdong, China) was introduced in the simulated adsorption system. Verification tests in desulfurization wastewater showed that up to 96% of Hg(II) ions were removed, probably as a result of co-precipitation of mercury and other co-existing ions.
研究领域:
环境科学
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化学工程
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废水处理
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2020
·
IF 3.99
Ruiqi Yan,Zhaofu Qiu,Xiaotong Bian,Ji Yang,Shuguang Lyu,Anhui Zhou
As a toxic element, antimony (Sb) often exists in contaminated water in the form of Sb(III) and Sb(V), and poses a threat to the environment and human health. To remove Sb from water efficiently, the novel cerium hydroxide loaded Y-tape molecular sieve adsorbent (NaY@Ce) was successfully prepared by co-precipitation method. Adsorption capacity of the adsorbent showed up the increasing trend with the increase of cerium species. With 0.4 % loading of cerium trichloride, the maximum adsorption capacity of Sb(III) and Sb(V) on NaY@Ce was 24.65 mg/g and 7.28 mg/g at pH = 7.0, respectively. The results of batch experiments showed that the Langmuir isotherm well described the Sb(III) adsorption experiments, while Sb(V) better fitted the Freundlich model. Both adsorption behaviors fitted the pseudo-second-order kinetic model. The adsorbent exhibited excellent Sb removal performance in the wide range of pH = 2–10 and co-existing anions such as Cl − , NO 3 − , HCO 3 − and SO 4 2- almost have no effect on the adsorption process. And there was almost no release of Ce at pH＞2. The SEM, EDS, XRD, FTIR and XPS analysis confirmed the successful loading of Ce, and explained the possible mechanism of Sb on the adsorbent. Abundant hydroxyl groups and the presence of Ce(Ⅳ) were the basis of adsorption. The adsorption mechanisms for antimony included partial Sb(III) oxidized to Sb(V) and simultaneously adsorbed on NaY@Ce, formed Ce–O–Sb inner-sphere surface complexes between metal hydroxyl groups and antimony and electrostatic attraction. The above results confirmed that NaY@Ce can be used as a promising adsorbent to efficiently remove Sb from aqueous solution.
研究领域:
环境科学
·
水处理
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2022
·
IF 5.546
Yaotian Peng,Xiaoyan Feng,Jianming Jiang,Li Ren
Bilirubin, a dangerous toxin may lead to serious brain injury, can be widely removed by hemoperfusion. However, the hemoperfusion adsorbents with higher removal ability, excellent hemocompatibility and biocompatibility still need to be explored. In this work, a novel functionalized polyvinylpyrrolidone (PVP) was synthesized by reversible addition-fragmentation chain transfer (RAFT) polymerization. Then PVP-modified polystyrene-divinylbenzene (PS-DVB-PVP) microspheres were prepared by a one-pot restore-click method. The results showed that the adsorption capacity and rate of microspheres for bilirubin were increased after modification with PVP. In the hemocompatibility and biocompatibility test, the modified microspheres demonstrated higher resistance to human serum albumin (HSA) and excellent hemolysis rate. In order to study the role of PVP in the bilirubin-adsorption process, isotherms were fitted by Langmuir model and Freundlich model, while kinetics data were fitted by pseudo-second-order model and intraparticle diffusion model. In addition, the modified microspheres showed no difference with unmodified microspheres in the coagulation test and exhibited no cytotoxicity to L929 cells. These results showed that our modified microspheres have both excellent hemocompatibility and outstanding biocompatibility, which will not cause hemolysis and coagulation. All these results made them possible to become a new adsorbent for efficient removing bilirubin in hemoperfusion.
研究领域:
材料科学
·
生物医学工程
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化学工程
·
生物化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2025
·
IF 8.4
Jiyue Ding,Xiaoyu Liu,Ning Zhang,Yi Wang,Ke Cui,Huachi Yu,Jingyi Chen,Qingyang Xu,Jianyang Gao,Huaizhi Shao,Zilin Meng
The Mg-Al layered double hydroxides are intercalated with inorganic sulfides of sodium trithiocarbonate (Na 2 CS 3 ), sodium sulfide (Na 2 S), and organic sulfides of sodium dimethyldithiocarbamate (SDTC), trithiocyanuric acid (TMT) via the co-precipitation method for the purpose of removing Cu 2+ and Pb 2+ in aqueous solutions. The sorbents are characterized by XRD, FT-IR, BET, SEM, XPS and zeta potential. The sorption kinetic data fits well with the pseudo-second-order model and the intra-particle diffusion model. The sorption isotherm data for Cu 2+ align more closely with the Langmuir model, suggesting a preference for monolayer adsorption, whereas Pb 2+ sorption better follows the Freundlich model, indicating heterogeneous multilayer adsorption, thus revealing distinct sorption processes. Among the sulfur-intercalated LDHs, SDTC@LDH exhibits the highest sorption capacity for Cu 2+ and Pb 2+ , reaching 357.14 mg/L and 274.76 mg/L, respectively. Molecular simulations further elucidate the superior performance of organic sulfur-intercalated LDHs, demonstrating higher binding energies and stronger affinity between organic sulfides and Cu 2+ /Pb 2+ . The sorption mechanisms for Cu 2+ and Pb 2+ are explored: Cu 2+ preferentially reacts with interlayer sulfides in LDHs, subsequently displacing hydroxyl groups from the LDHs layers to form precipitates, whereas Pb 2+ first bonds with hydroxyl groups on the LDHs layers, causing structural collapse, followed by capture by exposed interlayer sulfides. Dynamic sorption experiments demonstrate that SDTC@LDH can treat larger volumes of aqueous solutions compared to other adsorbents, indicating that SDTC@LDH possesses superior sustained sorption capacity in water treatment applications. Coexisting ion experiments, pH tests, reusability studies, and sulfide/heavy metal leaching assessments confirm the high selectivity and stability of the adsorbents for Cu 2+ and Pb 2+ , with minimal risk of secondary pollution. Metal speciation analysis reveals that organic sulfur-intercalated LDHs provide more stable sorption for Cu 2+ and Pb 2+ .
研究领域:
环境科学
·
材料化学
·
水处理
·
吸附技术
·
重金属修复
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）