BIORESOURCE TECHNOLOGY
·
2019
·
IF 6.669
Huayi Chen,Wenyan Li,Jinjin Wang,Huijuan Xu,Yonglin Liu,Zhen Zhang,Yongtao Li,Yulong Zhang
To improve the adsorption efficiency, a H 3 PO 4 -modified biochar (CFCP) was prepared using chicken feather and applied to Cd 2+ and Pb 2+ adsorption. The pseudo-second-order model could explain the Cd 2+ and Pb 2+ adsorption behavior. CFCP had faster adsorption rate than non-modified biochar (CFC2). The Langmuir and Freundlich isotherm could better describe the Cd 2+ and Pb 2+ adsorption, respectively. The value of q m for Cd 2+ adsorption and K F for Pb 2+ adsorption by CFCP was 7.84 mg·g −1 and 24.41 mg 1−(1/n) ·L 1/n ·g −1 , which was 1.38 and 5.41 times of the corresponding results of CFC2. Relative to Cd 2+ , Pb 2+ was selectively adsorbed by biochars in the binary metal system. Phosphate precipitation explained in part the selective adsorption of Pb 2+ . Proline, glucose, and pH (4–6) had little influence on Cd 2+ and Pb 2+ adsorption. Electrostatic interaction, precipitation, and O–H bonds were the primary adsorption mechanisms. The increased N-containing heterocycles of CFCP accounted for the increased Cd 2+ and Pb 2+ adsorption.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Yujun Zhou,Xuan Zhang,Fei He,Keyin Liu,Nan Nan Xia,Qin Wu,Fangong Kong
Toward the development of a sustainable utilization strategy for adsorption materials, a starch-based adsorbent starch–chitosan–tannic acid (St–CTS–TA) with a three-dimensional (3D) structure was fabricated in water via electrostatic and hydrogen bonding reactions between St, CTS, and TA without using toxic reducing agents or special instruments. St-CTS-TA demonstrated a high specific surface area of 37 m 2 /g as well as a mesoporous/macroporous distribution ranging from 30 to 80 nm, which enhanced the mass transfer of adsorbate and the exposure of catechol groups in TA. The Langmuir isotherm adsorption model revealed that the highest adsorption capacities of St–CTS–TA for Fe 3+ and Co 2+ were 1678.2 and 944.8 mg/g, respectively. Surprisingly, the specific surface area of St–CTS–TA increased from 37 to 87 and 42 m 2 /g after Fe 3+ and Co 2+ adsorption, respectively, and the resulting St–CTS–TA–Fe and St–CTS–TA–Co could continuously adsorb basic fuchsin (BF) and rhodamine B (RhB). The adsorption capacities of St-CTS-TA-Fe and St-CTS-TA-Co for BF/RhB were found to be 1854.79/401.19 mg/g and 2229.77/537.49 mg/g, respectively, based on the Langmuir isotherm adsorption model.
研究领域:
材料科学
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环境科学
·
可持续发展
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Xiaojie Fang,Sidi Zhu,Jianzhe Ma,Fengyun Wang,Haihua Xu,Mingzhu Xia
In this paper, a simple chemical precipitation method was proposed to obtain zoledronate functionalized hydroxyapatite (zole-HAP) hybrid nano- biomaterials (zole-HAP-HNBM) which were firstly applied to adsorption. The characterizations of materials verified that the addition of zoledronate declined the crystallinity and transformed the morphology of HAP from short rod shape to microsphere, changed micro structure of the hybrid nanobiomaterial. Adsorption experiments carried out under different conditions showed that adsorption capacity of the nanobiomaterial, enhanced by the addition of zoledronate in preparation, which is equal to 1460.14 mg/g on Pb 2+ and 226.33 mg/g on Cu 2+ in optimum qualifications, was elevated more than the reported values in many literatures. At last, the sorption mechanisms of HAP and zole-HAP for Pb 2+ and Cu 2+ were probed by experiments and Multifwn program calculation in details. It suggested that the dominant sorption mechanisms of HAP for Pb 2+ were ion exchange and dissolution-precipitation rather than surface complexation, while besides the dissolution-precipitation mechanism, surface complexation may contribute more in the adsorption process of 10zole-HAP for Pb 2+ . Once considering HAP and 10zole-HAP, removal mechanisms of Cu 2+ could involve surface complexation and ion exchange.
研究领域:
材料科学
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环境科学
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生物学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 83
·79641-79650
·
IF 3.289
Ping Tan,Junjie Wen,Yongyou Hu,Xiaojun Tan
Novel poly(vinyl alcohol)/graphene oxide (PVA/GO) nanofibers were fabricated by electrospinning and applied to remove Cu2+ and Cd2+ from aqueous solution. The adsorption performances of the PVA/GO nanofibers were investigated by removing Cu2+ and Cd2+. The results showed that the adsorption of Cu2+ and Cd2+ onto PVA/GO nanofibers increased as the pH was increasing, but only slightly reduced with the increasing of ionic strength. The adsorption could reach equilibrium within 25 min and the experimental kinetic data followed the pseudo-second-order kinetic model. The equilibrium adsorption data can be well fitted with the Langmuir model. The thermodynamic parameters calculated from adsorption isotherms at four different temperatures indicated that the adsorption processes were endothermic and spontaneous. The PVA/GO nanofibers have good regeneration ability and can be recycled 8 times with a small amount of loss in adsorption efficiency. FTIR and XPS results indicated that the carboxyl and the carbonyl groups of GO on the surface of the nanofibers mainly participated in the adsorption of Cu2+ and Cd2+.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2019
·
IF 6.044
Xiaoliang Qi,Ruona Liu,Mengyu Chen,Zhipeng Li,Tao Qin,Yuna Qian,Shengzhe Zhao,Minchao Liu,Qiankun Zeng,Jianliang Shen
Polysaccharides are an important class of materials that are often exploited in the fields of food, agriculture, biomedical engineering and wastewater treatment owing to their unique and tunable properties. In this work, we utilize an inexpensive and sustainable extracellular polysaccharide salecan (EPS), which is produced by bacterium Agrobacterium sp. ZX09 , as a hydrogel matrix, poly(3-sulfopropyl methacrylate potassium salt) (PSM) as side chains to fabricate EPS-grafted-PSM adsorbents through a simple one-pot approach. Scanning electron microscope, X-ray diffraction, Fourier transformed infrared spectroscopy, rheometry and thermogravimetry were conducted to characterize the physicochemical properties of resultant adsorbents. We noticed that EPS not only served as the host chains of network to adjust the water uptake ability of adsorbents, but also endued them with tunable polarity. Further, the adsorption behaviors of developed adsorbents to copper ions (Cu 2+ ) were explored: these gels present high absorption ability for Cu 2+ through a chemical adsorption process which well described by Freundlich isotherm and pseudo-second-order kinetic models. In summary, the approach exhibited in this work opens a new avenue to design polysaccharide-based materials for Cu 2+ adsorption.
研究领域:
材料科学
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环境工程
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生物技术
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产品关联
DOI
PubMed
高影响因子
CLAYS AND CLAY MINERALS
·
2024
·Vol. 66
·期 5
·466-473
·
IF 2
Jingyi Liu,Rui Chen,Yuru Li,Jiajia Chen,Lihui Chen,Jing Gao,Guohua Li
The elimination of Pb2+ and recovery of lead metal during the treatment of industrial sewage is an important research topic. Montmorillonite (Mnt) is a promising material in this regard. The purpose of the present study was to improve the Pb2+ adsorption ability of Na-containing Mnt (Na-Mnt) by pillaring titania (anatase) into its interlayer spaces using a sol-gel method. The samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The ratio of Ti to Mnt affected the crystal phase of titania-pillared Na-Mnt (Ti-Mnt), and changed the interlayer spacing of the (001) plane of Ti-Mnt and the growth of anatase. The Pb2+-adsorption capabilities of Ti-Mnt were tested using an aqueous solution of lead nitrate as a wastewater model. The Ti-Mnt prepared adsorbed >99.99% of the Pb2+; leached and activated Ti-Mnt adsorbed >95.7% of the Pb2+, indicating that Ti-Mnt could be recycled effectively. Furthermore, the Pb2+-adsorption capability of Ti- Mnt was related to the interlayer spacing of Mnt, the distribution of anatase particles pillared in Mnt, and the specific surface area, especially with respect to the relationship between the anatase particles and the interlayer spacing of the (001) plane.
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
HYDROMETALLURGY
·
2020
·
IF 3.338
Yong Xiang,Shuaiwei Ding,Xiangmeng Chen,Chunmei Cao,Jingping Sun,Li Xu,Guoji Liu
The design and synthesis of highly active adsorption materials for recycling noble metals are essential to the high-tech industry. Here, a new adsorbent material namely resorcinol-formaldehyde-biuret (RFB) is prepared by grafting biuret onto the phenolic. Compared with the traditional methods, the preparation of RFB herein requires no hydrothermal process, which reduces cost. What's more, RFB prepared without the hydrothermal process exhibits better adsorption performance. Specifically, it has a high adsorption capacity of 1334 mg/g at room temperature and a fast adsorption rate that can adsorb a 10 mL of 100 mg/L gold ion solution within 10 min by just 5 mg RFB. Different factors such as pH, coexisting metal ions , and contact time that affects the adsorption process were systematically investigated. FT-IR, SEM, TEM, and XPS were used to characterize the adsorbent before and after adsorption. It is found that the adsorption isotherm and kinetics of RFB are consistent with the Langmuir isotherm model and the pseudo-second-order kinetic model, respectively. Further regeneration and cyclic adsorption indicate that RFB can be recycled at least four times. Besides, the reduction of 4-nitrophenol to 4-aminophenol was realized with the assist of Au-adsorbed RFB (RFB-Au). The strong soft-soft interaction between N, O atoms and Au atoms gives the material excellent gold ion adsorption capacity and selectivity . Findings herein can broaden the application of nitrogen-rich nanomaterials in gold ion recovery.
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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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2018
·Vol. 54
·期 3
·2093-2101
·
IF 2.993
Wu Yanzi,Ma Yujie,Xu Guanhong,Xia Tianyi,Liu Wenxuan,Dong Zezhong,Yuan Qing,Zhang Cong,Hu Qin
Two novel porous metal–organic frameworks (MOFs) Cu(TCPBDA) and Cd(TCPBDA) based on a new ligand, namely N,N,N′,N′-tetrakis(4-carboxyphenyl)biphenyl-4,4′-diamine (H 4 TCPBDA), were synthesized by solvent thermal method and characterized with scanning electron microscopy, powder X-ray diffraction, BET analysis and spectrofluorometry. The static adsorption of the two MOFs for lead ions (Pb 2+ ) was investigated. Cu(TCPBDA) showed a higher adsorption capacity for Pb 2+ compared with Cd(TCPBDA), and its maximum adsorption capacity was 300 mg/g. The adsorption performance of Cu(TCPBDA) was then further studied. It was found that the adsorption of Cu(TCPBDA) for Pb 2+ fitted the Freundlich model and pseudo-second-order equation very well. The adsorption ability of Cu(TCPBDA) was applied to fast and efficient adsorption for Pb 2+ in toner. The results indicates that Cu(TCPBDA) is a promising material in adsorption and removal of heavy metal ions.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2025
·
IF 7.7
Jin Yan,Xinyu Zhou,Chenchen Li,Qi Meng,Yingjie Zhang,Peng Dong
Wastewater containing Cu 2+ and Cd 2+ poses a huge threat to the surrounding environment and human safety. To treat such wastewater, this study developed a novel composite adsorbent (LZT 850 @SA) from thermally activated LZT and sodium alginate (SA). LZT was thermally activated at 850°C (LZT 850 ). The composite LZT 850 @SA was synthesized by mixing LZT 850 powder with SA solution under optimized conditions (20°C, 4 g/L SA, 90 min). Adsorption performance for Cu 2+ /Cd 2+ was evaluated under varying pH, contact time, temperature, and concentration. Kinetics, isotherms, selectivity, and regeneration were systematically studied. Activation at 850°C enhanced LZT crystallinity and created pores (SSA: 5.46 m 2 /g). SA compositing formed unique fibrous architectures and amorphous-crystalline interfaces, significantly increasing SSA to 16.31 m 2 /g (BET). XRD confirmed the dominant phases (CaCO 3 , CaO, MgO) in LZT 850 and phase transition upon SA compositing. SEM/HRTEM revealed SA's transformation of the granular LZT 850 surface into a highly porous, roughened morphology with uniform particle distribution. At pH 6, LZT 850 @SA exhibited exceptional adsorption capacities of 223.47 mg/g (Cu 2+ ) and 227.99 mg/g (Cd 2+ ), reaching equilibrium within 120 min. Adsorption followed pseudo-second-order kinetics and Langmuir isotherm models, indicating chemisorption-dominated monolayer adsorption. Mechanisms involved chemical coordination (C=O, O-C=O, O-H, iron oxides), ion exchange, coordination and electrostatic interactions. The composite demonstrated excellent selectivity and retained 81.9% (Cu 2+ ) and 85.52% (Cd 2+ ) adsorption capacity after 5 regeneration cycles. This provides a new strategy for the composite of solid waste and biopolymers, and at the same time offers technical insights for the treatment of heavy metal-polluted wastewater.
研究领域:
环境科学
·
材料工程
·
化学工程
·
水处理技术
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吸附科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2021
·
IF 5.268
Zhiyue Li,Zhiwei Guo,Taoyi Zhang,Quan Li,Jing Chen,Wenxi Ji,Cong Liu,Yun Wei
Synthesizing high uniform metal-organic frameworks grown on natural biomass such as sodium alginate (ALG), which can efficiently remove metal ions from aqueous solution, is a challenging project. A simple and eco-friendly method of preparing ALG@ZIF-67 hydrogels by in situ synthesis of ZIF-67 onto ALG hydrogels was established. Combining the virtues of ALG with abundant hydroxyl and carboxyl groups and ZIF-67 with excellent porous structure, the obtained ALG@ZIF-67 hydrogels have excellent adsorption for Cu 2+ (153.63 mg/g), which was much higher than that of pure ALG hydrogels (111.79 mg/g). The methodology showed that the adsorption process was in accord with the Langmuir isotherm adsorption model (R 2 = 0.9972) and pseudo-second-order kinetic model (R 2 = 0.9822). The thermodynamic experiments demonstrated that Cu (II) was absorbed by hydrogel with an endothermic and spontaneous process. The competitive adsorption experiment results of ALG@ZIF-67 hydrogel indicated that the absorption capacity of Cu (II) was higher than that of Cd (II), Ni (II), Zn (II) and Mn (II). Moreover, the ALG@ZIF-67 hydrogels still had excellent reusability after five adsorption-desorption cycles. The results indicated that the ALG@ZIF-67 hydrogels had the advantages of low cost, easy preparation, and environment friendly.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Tonghui Xu,Yuanlong Guo,Lihua Zhang,Yumei Chen,Yunqi Li,Tianlong He,Songmiao Liang,Lijie Hu,Haibo Xie
The facile preparation of sustainable sulfur-containing polymer functional materials has been obtained great attention due to their chemical reactivity and metal complexing ability. In this study, taking the solution properties advantages of the newly developed cellulose solvent system of DBU/DMSO/CO 2 , thiol and disulfide bond functionalized cellulose ester (TDSCE) was facilely prepared via in-situ tandem transesterification and oxidation reaction by using methyl 3-mercaptopropionate, without adding any external catalyst. The synthetic protocol was featured by that the DBU not only acted as reagent for the dissolution of cellulose, but also catalysts for the transesterification of cellulose with methyl 3-mercaptopropionate to yield cellulose 3-mercaptopropionate (Cell-MP) with maximum degrees of substitution (DS) of 0.77, and an oxidant for the partial oxidation of Cell-MP to produce a cellulose methyl 3,3′-disulfanediyldipropionate (Cell-MDSP) with maximum DS of 0.36 mixed ester, respectively. With successful introduction of thiol and disulfide bond into the cellulose backbone, the TDSCEs indicated desirable selective absorption of Au 3+ from mimic heavy mental ions waste water due to the sulfur-Au chemistry with maximal adsorption capacity for Au 3+ of 415.2 mg/g. The subsequent reduction of Au 3+ into gold nanoparticles (Au NPs) fabricated a robust TDSCE-2@Au NPs composite catalyst with high catalytic activity for the hydrogenation treatment of water pollutes, such as 4-nitrophenol (4-NP)and azo dyes.
研究领域:
材料科学
·
环境科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 35
·20504-20514
·
IF 3.119
Jianwen Wei,Siqi Chen,Yu Li,Zeyu He,Linlin Geng,Lei Liao
To find an alternative adsorbent with high adsorption performance, KIT-6 was prepared by hydrothermal crystallization synthesis using tetraethyl orthosilicate as a silicon source and triblock copolymer P123 as a template. Then the silane coupling agent (3-chloropropyl)trimethoxysilane was first grafted onto KIT-6 mesoporous material and then the polyethyleneimine (PEI) was further grafted through the substitution reaction between amino groups and chlorine atoms. The functionalized KIT-6 was denoted as PEI/KIT-6. The samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), N2 adsorption–desorption, elemental analysis (EA), Fourier transform infrared spectroscopy (FT-IR) and thermal gravimetric analysis (TGA). The Cu2+ adsorption performance was determined by inductively coupled plasma (ICP). The results showed that the average loading of the amino groups was 3.74 mmol g−1, and the modified KIT-6 still has a stable mesoporous structure without pore blockage. With the dosage of 1 g L−1 PEI/KIT-6 and at room temperature, the optimum pH value for adsorption of 100 mg L−1 Cu2+ was 6.0. The adsorption capacity of PEI/KIT-6 for Cu2+ increased with the increase of reaction temperature, and the maximum adsorption capacity of Cu2+ was 36.43 mg g−1. The adsorption capacity tends to reach equilibrium after 120 min, and the optimum adsorption temperature was 35 °C. The pseudo-second-order kinetic model was found to be well suited for the adsorption process of Cu2+. Adsorption equilibrium data could also be described well by the classical Langmuir and Freundlich isotherm models. The adsorption tends to be the chemisorption of a monolayer.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
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