Minerals
·
2023
·Vol. 13
·期 10
·1337
·
IF 2.5
Jiaqian Zhang,Zhe Wang,Ying Luo,Zhenlong Zhang,Xiyang Feng,Qiuping Zeng,Duan Tian,Chao Li,Yongde Zhang,Shu Chen
To enhance the sorption efficacy of attapulgite for heavy metals, mercapto-functionalized attapulgite (ATP-SH) was synthesized with mercaptan functional groups. When the mass-to-volume ratio of calcined attapulgite (ATP-C) to 3-Mercapropyltrimethoxysilane (MPTMS) was 1 g:0.5 mL (ATP-SH-0.5) and the pH was set to 8, a strong adsorption capacity for Cd (II) and Pb (II) was demonstrated. This indicates excellent adsorption performance for these heavy metals. ATP-SH-0.5 exhibited a maximum adsorption capacity of 43.81 mg/g and 274.83 mg/g for Cd (II) and Pb (II), respectively, in a single ion system. In a binary ion system, the maximum adsorption capacity was 31.86 mg/L and 254.45 mg/L for Cd (II) and Pb (II), respectively. Various characterizations and experiments showed that the adsorption of Cd (II) and Pb (II) onto ATP-SH-0.5 involves ion exchange reactions involving hydroxyl and thiol functional group complexation reactions. This adsorption process follows a single-molecule layer adsorption mechanism. XPS results indicate that hydroxyl and grafted thiol functional groups on the surface of mercapto-functionalized attapulgite participated in surface complexation reactions with Cd (II) and Pb (II), resulting in the formation of Cd-S and Pb-S species. Overall, this study provides a promising mercapto-functionalized modification material for the remediation of polluted water and soil.Keywords:attapulgite;thiol functional group;heavy metal;adsorption mechanism;XPS qualitative analyses
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SOLAR ENERGY
·
2020
·
IF 4.608
Junbing Shi,Min Li
Attapulgite with a nanoporous structure is an excellent supporting material to solve leakage of polyethylene glycol (PEG). However, when raw attapulgite is used as a supporting material , the latent heat storage capacity of PEG/ raw attapulgite form stable composite phase change material (FSCPCM) cannot be fully utilized. In this work, N-(2-aminoethyl)-3-aminopropyltrimethoxysilane (KH792) was initially modified attapulgite with amino groups firstly. A new form stable composite phase change material (FSCPCM) was prepared by adsorbing PEG into this modified attapulgite (N-ATP). The pore structure, leakage and thermal energy storage performance of this FSCPCM were investigated. Those results indicated that, compared to raw attapulgite, using N-ATP as a supporting material improved the crystallinity of PEG in the FSCPCM. Due to this improvement, the latent heat of the FSCPCM was significantly enhanced accordingly. Differential Scanning Calorimetry (DSC) measurements showed the latent heat of the PEG/N-ATP FSCPCM increased by 86.7% from the PEG/raw attapulgite FSCPCM and was close to the theoretical latent heat. Thermal conductivity analyses indicated the thermal conductivity of the PEG/N-ATP FSCPCM improved relative to of PEG. The thermogravimetric analysis (TGA), leakage testing and thermal cycling tests indicated that the PEG/N-ATP FSCPCM also had good thermal reliability, good thermal stability and leakage-proof performance. Moreover, relative to PEG/raw attapulgite FSCPCM, cement incorporated PEG/N-ATP FSCPCM has better heat storage capacity and strength.
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JOURNAL OF SEPARATION SCIENCE
·
2019
·Vol. 42
·期 23
·3521-3527
·
IF 2.516
Rongrong Xuan,Tingting Wang,Chunyan Hou,Xie Li,Ying Li,Yihui Chen,Yajie Gao,Dan Qiu,Xunwen Xiao,Lihua Zhang,Yukui Zhang
Cetyltrimethyl ammonium bromide-modified attapulgite was prepared and utilized as a novel sorbent in a simple solid-phase extraction method for the determination of vitamin A in blood serum. Several factors affecting extraction efficiency were systematically optimized, including the sampling solvent and its volume, as well as the elution solvent and its volume. Under the optimal solid-phase extraction conditions, the adsorption capacity of vitamin A was as high as 28 mg/g according to the Langmuir isotherm model. Based on the developed solid-phase extraction method, the level of vitamin A in 200 µL blood serum sample could be accurately determined by high-performance liquid chromatography. The recoveries of vitamin A spiked in 10% v/v methanol aqueous solutions were in the range of 86.9–92.8%, with the relative standard deviations not more than 8.1%. The method was applied to the determination of vitamin A in serum samples from 20 pregnant women. Compared with the previously reported solid-phase extraction methods for determination of vitamin A in serum, our developed cetyltrimethyl ammonium bromide-modified attapulgite-based solid-phase extraction method used lower serum volume, omitted extra steps (i.e. evaporation and re-dissolution), and eliminated internal standard. The results were promising for it to be used in routine monitoring during pregnancy.
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PubMed
高影响因子
Journal of Environmental Sciences
·
2018
·
IF 3.12
Jie Tang,Bin Mu,Li Zong,Aiqin Wang
The utilization of waste products as valuable materials was a technical imperative for waste management . In this study, the cost-effective attapulgite/carbon (APT/C) composite was developed for wastewater treatment using waste hot-pot oil as a carbon precursor through a facile one-step calcination process. The APT/C composite prepared at 300°C exhibited the excellent adsorption capacity and rapid equilibrium rate over a broad pH range for the removal of various pollutants. More importantly, the removal ratios of the composites toward Methyl Violet and tetracycline still remained 77.6% and 60.2% of the initial adsorption capacity after ten adsorption–regeneration cycles via a facile thermal regeneration strategy, respectively. Beyond all doubt, this research provided a feasible and economical way for the sustainable utilization of waste hot-pot oil in wastewater treatment, achieving the concept of disposal waste with waste and recycling.
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高影响因子
Catalysis Science & Technology
·
2019
·Vol. 9
·期 14
·3788-3799
·
IF 5.726
Jia Zheng,Zhi Zhu,Ge Gao,Zhi Liu,Qiu Wang,Yongsheng Yan
In this study, a spindle structured CeO2 photocatalyst modified with rod-like attapulgite (CeO2/ATP) was successfully prepared by simple high temperature calcination. ATP was deposited in the precursor solution of CeO2 and then heating up the mixture afforded the CeO2/ATP photocatalyst. The photocatalyst showed remarkable reduction efficiency for CO2. CO (309.44 μmol g−1 h−1) and CH4 (184.33 μmol g−1 h−1) are the major products for CO2 reduction obtained by using the optimum proportion of the CeO2/ATP photocatalyst; the yield of CO and CH4 was about 3 and 3.6 times higher than that of CeO2, respectively. The improvement in the CO2 reduction efficiency originated from the higher conductivity of ATP, which promoted electron transport and enhanced the separation efficiency of the electron holes. At the same time, the introduction of ATP inhibited the accumulation of CeO2 and also increased the active sites for CO2 reduction. Moreover, a possible photocatalytic mechanism for the CO2 reduction reaction was proposed based on the experimental results. In addition, this study provides new insights for the simple preparation of other photocatalysts with high performance for CO2 reduction.
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FUEL
·
2017
·
IF 4.601
Zhong-Qiu Liu,Xian-Yong Wei,Hai-Hong Wu,Wei-Tu Li,Yang-Yang Zhang,Zhi-Min Zong,Feng-Yun Ma,Jing-Mei Liu
Modified microfiber attapulgite (MFA)-supported nickel was prepared by thermally decomposing nickel tetracarbonyl on MFA modified with an acidic ionic liquid (AIL, 1-sulfobutyl-3-methylimidazolium trifluoromethanesulfonate). It was characterized with multiple instruments and used for catalyzing hydroconversion of lignite-related model compounds (LRMCs) oxydibenzene, benzyloxybenzene, and oxybis(methylene)dibenzene. The results indicate that Ni 15% /MFA@AIL effectively catalyzes hydroconversion of the LRMCs to afford cyclanes by inducing the formation of H + , H − , and biatomic active hydrogen.
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NANO
·
2017
·
IF 1.025
Jiangdong Dai,Zhi Zhu,Jie Yang,Chunxiang Li
Herein, we presented a simple synthetic strategy for fabricating magnetic nanoparticles uniformly dispersed on the surface of attapulgite (ATP), namely the impregnation and pyrolysis method. Subsequently, using magnetic attapulgite as supported core through chemical modification, a novel surface molecularly imprinted nanomaterial (named as MATP/MIPs) was prepared via precipitation polymerization. The obtained MATP/MIPs showed excellent properties by a variety of characterizations including FT-IR, SEM, TEM, VSM, XRD and TGA. Moreover, the adsorption experiments were carried out in aqueous medium at different temperatures, to study the adsorption isotherm, adsorption kinetics and selective recognition ability of MATP/MIPs toward sulfamethazine (SMZ). The experimental data were fitted to the Freundlich isotherm model better than to the Langmuir model. The equilibrium adsorption capacity for SMZ onto MATP/MIPs is higher than onto MATP/NIPs, demonstrating the existence of imprinted cavities. Due to the advantage of coated nanoshell, the adsorption equilibrium was achieved quickly within 45 min, and the data were well-described by the pseudo-second-order kinetic mode. Compared with other antibiotics, the MATP/MIPs exhibited excellent selectivity for SMZ. In addition, the imprinted material still showed good regeneration ability after 10 cycles which make it possible for practical application in the recognition and separation of antibiotics.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Weijia Zhang,Jinghan Zhang,Xinyi Ma,Changhua Li,Bihe Yuan
Frequent oil spills have caused severe environmental pollution and ecological issues. Conventional adsorption materials are attractive candidates for oil spills, but their effectiveness is hindered primarily by certain high-viscosity oils. In this work, we fabricated a bio-based aerogel which is composed of sodium alginate and polyaniline-modified attapulgite, with photothermal conversion and water repellency (water contact angle > 138°) via freeze-drying and hydrophobic modification with polydimethylsiloxane . The composite aerogel has strong chemical stability, with a maximum absorption capacity of 32 g/g. Furthermore, the aerogel exhibits exceptional photothermal performance, achieving a surface temperature increase to 85 °C within 3 min under 1.0 sun irradiation. This capability reduces silicone oil absorption time from 4 to 1 min, conserving 75% of absorption time and reaching a silicone oil absorption capacity of 21 g/g. The separation efficiency of the aerogel for emulsions is also satisfactory, which greatly broadens its application range. The preparation of solar heated aerogels provides a potential solution for exploring biomass materials to solve the problem of oil spill recovery on a large scale.
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JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2025
·
IF 8.4
Lin-Jiang Zhong,Lin-Feng He,Hao-Ran Yang,Shu-Jie Hu,Di Wu,Meng-Yue Zhang,Ying Chen,Xuan Zhao,Hong Liu,Yuan Liu
In light of the urge demand for sustainable development and environmental protection, the recovery of phosphorus from source-separated urine holds great significance. This study proposed a novel approach combining magnesium-air fuel cells (MAFC) with modified granular attapulgite (GAT) to recover phosphorus from urine, producing a bulk blending fertilizer and soil amendment. The phosphorus adsorption capacity of GAT was enhanced by more than threefold following modification. The combined process attained a phosphorus recovery efficiency of 99.97 %, with the effluent phosphorus concentration decreased to 0.18 mg L −1 , which complies with the discharge standard of pollutants for municipal wastewater treatment plant (GB 18918-2002). In practical implementation, the process effectively treated real urine, yielding artificial phosphate ores (APOs) with a struvite content exceeding 88 % and a phosphate purity over 98 %. The pilot-scale assessment indicated a net benefit of 11.29 $·m −3 of urine, demonstrating significant economic feasibility. This work presents an innovative strategy for the efficient recovery of phosphorus from complex wastewater, showcasing its promising potential for practical applications.
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高影响因子
MICROCHIMICA ACTA
·
2016
·Vol. 183
·期 5
·1779-1786
·
IF 4.831
Li Huihui,Zhu Shuqiang,Cheng Ting,Wang Shuxia,Zhu Bin,Liu Xiaoyan,Zhang Haixia
Boronate affinity materials have been widely used for selective capture of cis-diols such as nucleosides. Adsorbents with features of low binding pH and high adsorption capacity are highly desired. However, most reported materials only possess one of the two features. We have synthesized a 1,3,5-triazine-containing binary boronic acid by reacting cyanuric chloride with 3-aminophenylboronic acid, and the product was then grafted onto attapulgite (a fibrous aluminum-magnesium silicate). The resulting functionalized attapulgite exhibit low binding pH (5.0) and display high adsorption capacity (19.5 ± 1.1 mg⋅g −1 for adenosine). The material exhibits high selectivity for cis-diols even in the presence of a 1000-fold excess of interferences. It was applied to the selective extraction of nucleosides from human urine. Typical features of the method include (a) limits of detection in the range from 4 to 17 ng⋅mL −1 , (b) limits of quantification between 13 and 57 ng⋅mL −1 , (c) relative standard deviations of ≤9.1 %, and (d) recoveries of nucleosides from spiked human urine between 85.0 and 112.9 %. In our perception, the material and method offer a promising strategy for selective capture of cis-diols in the areas of proteomics, metabolomics and glycomics.
We have prepared 1,3,5-triazine-containing binary boronic acid-functionalized attapulgite. The material exhibited low binding pH (5.0) and high adsorption capacity (19.5 ± 1.1 mg⋅g‾ 1 for adenosine).
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JOURNAL OF ANIMAL SCIENCE
·
2024
·
IF 2.7
Chen Liang,Li Fei,Ma Zhiyuan,Wang Aiqin,Kang Yuru,Liu Baocang,Xu Hui,Li Jiandong,Wang Xinji,Li Kaidong
This experiment was conducted to evaluate the effects of including a mixed-dimensional attapulgite clay (MDA) into a naturally moldly diet for Hu lambs. Fifty male Hu lambs with similar initial body weight (28.24 ± 1.80 kg) were randomly allocated into five dietary treatments: a basal diet containing naturally occurring mycotoxins with 0, 0.5, 1.0, and 2.0 kg/t MDA, and basal diet with a commercial mycotoxin adsorbent Solis with montmorillonite as the major component at 1 kg/t. Both MDA and Solis increased average daily gain (ADG) and dry matter intake (DMI; P ≤ 0.004), and there was no difference in growth performance between MDA and Solis (P ≥ 0.26). The final body weight, DMI, and ADG were linearly increased with increasing MDA supplementation (P < 0.01). Lambs treated with both MDA and Solis demonstrated greater apparent digestibility of dry matter (DM), organic matter (OM), and energy compared with the control group (P ≤ 0.03), and there were no differences in nutrient digestibilities between MDA and Solis (P ≥ 0.38). Digestibility of CP was linearly increased with the increasing MDA supplementation (P = 0.01). Neither MDA nor Solis affected rumen total volatile fatty acid (TVFA) concentration (P ≥ 0.39), but decreased the acetate-to-propionate ratio and molar proportion of n-butyrate (P ≤ 0.01), and MDA also increased the concentration of ammonia (P = 0.003). Besides, increasing MDA supplementation linearly reduced the acetate-to-propionate ratio and molar proportion of n-butyrate (P = 0.01), but linearly and quadratically increased the concentration of ammonia (P ≥ 0.003). These results showed that the incorporation of MDA into a naturally moldy diet of Hu lambs yielded comparable results to the Solis product, with higher growth performance and nutrient digestibility but lower acetate-to-propionate ratio observed. In conclusion, including ≥ 1 kg/t of MDA in high mycotoxin risk diets for growing lambs improves feed intake and rumen fermentation.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Pingping Zhang,Hengyang Mao,Shouyong Zhou,Mingmin Jia,Lei Zhou,Juan Zhai,Ailian Xue,Meisheng Li,Jing Zhong,Qi Zhang,Yijiang Zhao
The intercalation of inorganic nanofillers into graphene oxide (GO) layers regulates the pore structure of composite membranes , enhancing their application in oil-in-water (O/W) separation. However, the weak bonding between the nanofillers and GO may compromise membrane stability, affecting separation performance. Herein, we present a method for constructing a highly stable one-dimensional (1D) nanorod-intercalated GO composite membrane. The surface carboxyl density of GO was enhanced through modification, and Fe 3 O 4 nanoparticles were grown on the surface of 1D attapulgite (FATP) to adjust the hydroxyl density and roughness. The results indicate that strong interactions are formed between FATP and carboxylated graphene oxide (CGO), enhancing the binding force to −1.38 × 10 4 kcal·mol −1 . Benefiting from the intercalation effect and hydrophilic characteristics of FATP, the composite membrane exhibits a relatively high pure water flux (1630.5 L·m −2 ·h −1 ), hydrophilicity (water contact angle of 63°), and underwater superoleophobicity (underwater oil contact angle of 159°). In the O/W separation process, the composite membrane can effectively repel oil droplets with stable flux and oil rejection of 175.6 L·m −2 ·h −1 and > 98 %, respectively. Furthermore, the membrane exhibits excellent stability with steady permeability remaining approximately 80.2 % of the original value after multiple cycles of operation in diverse acidic and alkaline environments.
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