Desalination and Water Treatment
·
2024
·
IF 1
Xin Wen,Zhanfang Cao,Jing Wang,Shuai Wang,Hong Zhong
A novel tri-isopropanolamine functionalized graphene oxide (TI-GO) adsorbent was synthesized by one-step reaction at 358K. Then the prepared TI-GO was characterized by SEM-EDS, FTIR, Raman spectra, TG, BET and XPS. The characterization results indicated the TI-GO has been synthesized successfully and it interact with Pb(II) ions through its nitrogen and oxygen-containing functional groups. Batch adsorption experiments were applied to evaluate the optimized conditions of adsorption. The results indicated that the TI-GO can reach equilibrium adsorption in 30 min and get maximum adsorption capacity at 293 K, pH 5.0. Besides, the adsorption kinetic and adsorption isotherm research indicated that the adsorption of TI-GO fit pseudo-second-order (PSO) kinetic and Langmuir adsorption isotherm model. In addition, the maximum adsorption capacity evaluated by Langmuir adsorption isotherm equation is 1478 mg/g.
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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环境污染治理
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吸附材料
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL POLLUTION
·
2017
·
IF 5.099
Shuai Liu,Pingxiao Wu,Meiqing Chen,Langfeng Yu,Chunxi Kang,Nengwu Zhu,Zhi Dang
Three novel organic vermiculites (VER) modified by amphoteric surfactants (BS, SB and PBS) with different negatively charged groups (carboxylate, sulfonate and phosphate) were demonstrated and used for removal of bisphenol A (BPA) and tetrabromobisphenol A (TBBPA). The difference in the structure and surface properties of modified vermiculites were investigated using a series of characterization methods. BS and SB surfactant mainly adsorbed on the surface and hard to intercalate into the interlayer of VER, while both adsorption and intercalation occurred in PBS modification. This difference resulted in different packing density of surfactant and hydrophobicity according to the results of contact angle, and affect the adsorption capacities ultimately. The adsorption of two pollutants onto these modified vermiculites were very fast and well fitted with pseudo-second-order kinetic model and Langmuir isotherm . PBS-VER exhibited the highest adsorption capacity (92.67 and 88.87 mg g −1 for BPA and TBBPA, respectively) than other two modified vermiculites in this order PBS-VER > BS-VER > SB-VER. The ionic strength (Na + , Ca 2+ ) and coexisting compounds (Pb 2+ , humic acid) have different effects on the adsorption. PBS-VER had a good reusability and could remove ionic (methylene blue and orange G) and molecular (BPA) pollutants simultaneously and effectively due to the function of amphoteric hydrophilic groups and alkyl chains. The results might provide novel information for developing low-cost and effective adsorbents for removal of neutral and charged organic pollutants .
研究领域:
环境科学
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吸附材料
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污染控制
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环境化学
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功能材料
✓ 已验证
DOI
高影响因子
RSC Advances
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2016
·Vol. 6
·期 79
·75855-75861
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IF 3.289
Qixuan Song,Hui Wang,Baoshan Yang,Fei Wang,Xinrong Sun
A novel silver nanoparticle-modified magnetic multi-walled carbon nanotube composite (Ag-FMWCNTs) was synthesized by embedding Fe3O4 and assembling Ag nanoparticles in one-step. The properties of the Ag-FMWCNTs composites and magnetic multi-walled carbon nanotubes (FMWCNTs) were studied by scanning electron microscopy, vibrating sample magnetometry (VSM) and Fourier transform infrared spectroscopy. The adsorption isotherms, adsorption kinetics and the effects of solution pH and ionic strength to adsorb emerging contaminant sulfamethoxazole (SMX) from aqueous solution on different multi-walled carbon nanotubes-based adsorbents were determined. The results showed that the adsorption kinetics could be explained well by means of the pseudo-second-order and intraparticle diffusion models. The pH experiments showed that maximum adsorption occurred at pH 4. Additionally, all adsorbents had a strong adsorption ability to SMX and the Langmuir maximum capacity followed the order: 5% Ag-FMWCNTs (118.58 mg g−1) > 3% Ag-FMWCNTs (86.41 mg g−1) > MWCNTs (73.69 mg g−1) > 1% Ag-FMWCNTs (70.26 mg g−1) > FMWCNTs (45.13 mg g−1). The spent adsorbents were regenerated in methanol. It was also found that after regenerating four times, multi-walled carbon composites retained up to 80% of their original adsorption performance. Therefore, the Ag-FMWCNTs composite could be used as a potential adsorbent for removing sulfamethoxazole from water.
研究领域:
环境科学
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纳米技术
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水污染控制
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吸附材料
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药物残留治理
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Shujuan Lian,Xiaoshuang Shi,Mingyi Lu,Mengdan Zhang,Xiaohuan Dong,Xu Li,Quan Feng,Rongbo Guo
Due to the persistence in residue and the emission to environment, antibiotics have become the emerging contaminants. Tetracyclines, as the largest amount of antibiotics in the breeding industry, were investigated in this study. For eliminating the tetracyclines, anaerobic culture was enriched from livestock waste after four generations and FeOn(OH)m modified oyster shell powders (OSPs) were amended into the enrichment culture as auxiliary method. Tetracycline and oxytetracycline were selected as the model compounds. The adsorption models (Langmuir and Freundlich isotherms) of tetracycline and microbes on OSPs were simulated respectively. With the addition of FeOn(OH)m modified OSPs, the transformation efficiency of oxytetracycline achieved 81.5% after 22 days’ incubation, approximately 1.85 times higher than the 4th generation (G-IV) enrichment culture without modified OSPs. Dehydration, demethylation, dehydroxylation and decarboxylation took place under anaerobic condition, inferred from the detected metabolites transformed from oxytetracycline. Genus Methanosarcina and two operational taxonomic units (OTUs) assigned to order Clostridiales , showed an increasing trend on abundance, indicating the contribution to transformation of oxytetracycline. Therefore, the FeOn(OH)m modified OSPs and enrichment culture can accelerate the transformation of oxytetracycline simultaneously, indicating a promising utilization not only for waste water system but also for antibiotic contaminated biomass treatment.
研究领域:
环境微生物学
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污染物生物降解
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环境工程
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抗生素去除
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吸附材料
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厌氧消化
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药物代谢
✓ 已验证
DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2015
·
IF 3
Yinghao Min,Yanmei Zhou,Min Zhang,Han Qiao,Qi Huang,Tongsen Ma
The removal of ionic liquid (1-butyl-3-methyl imidazolium chloride: BMImCl) was studied from aqueous solution by raw bentonite, acid-activated bentonite and organic-modified bentonite. These types of bentonite sample were characterized by FT-IR, TGA and XRD. The effects of contact time, BMImCl initial concentration, pH, ionic strength, and humic acid on the removal of BMImCl were investigated via batch adsorption experiments. The adsorption kinetics models were applied to predict the adsorption constants, and the kinetic data indicated that the pseudo-second-order model gave a better fit. Furthermore, the Langmuir, Freundlich and Temkin isotherms models were also introduced to describe adsorption process in order to obtain possible mechanism of the removal. The applied isotherms models demonstrated that the adsorption data of acid-activated bentonite samples were well described by Temkin adsorption isotherm, and the isotherm model of organic-modified bentonite was Langmuir adsorption isotherm. The adsorption experiments indicated that these bentonite samples might be applied in repair of soil and water contaminated by ionic liquids.
研究领域:
环境科学
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土壤修复
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水污染治理
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吸附材料
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环境功能材料
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Shuwen Xue,Yawen Xiao,Guoqiang Wang,Jinjin Fan,Keji Wan,Qiongqiong He,Mingqiang Gao,Zhenyong Miao
Magnetic nanoparticles require a protective coating to enable them to be used to adsorb heavy metals from wastewater, given their oxidation properties and instability in acidic media. Humic acid (HA) has an affinity for magnetic nanoparticles, but its adsorption capacity is low. To improve adsorption capacity, we synthesized a novel adsorbent (HA-O/Fe 3 O 4 ) through chemical modification and examined its adsorption of Pb (II), Cu (II), Cd (II), and Ni (II) ions. The effects of pH competition, adsorption mechanism, isotherm, kinetics, regeneration, and stability were investigated. The HA-O/Fe 3 O 4 exhibited faster kinetic performance (10 min), conforming to the pseudo-two kinetics equation, and the adsorption isotherm conforms to the Langmuir model with maximum adsorption capacities of 111.10, 76.92, 71.43, and 33.33 mg/g, respectively. The interaction between metal ions and functional groups of the adsorbent was further characterized by Fourier-transform infrared spectroscopy, and the results indicated that adsorption by cation exchange at low pH and complexation at high pH. Additionally, the adsorbent was recycled four times, and the removal rate was not significantly affected. A recycling efficiency of more than 90 % indicates good sustainability and reusability. The stability test shows that the amount of organic matter and heavy metals desorbed by the adsorbent were negligible. Most importantly, at low concentrations, all four metal ions meet the industrial emission standards, and Pb (II) and Cu (II) meet the drinking water standards.
研究领域:
环境科学
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纳米技术
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水处理
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吸附材料
·
污染控制
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2012
·Vol. 129
·期 4
·1799-1805
·
IF 1.289
Yinchuan Tang,Qinglin Ma,Yafei Luo,Li Zhai,Yuju Che,Fanjun Meng
This study focuses on an improved synthesis of a branched poly (ethylene imine) (PEI)-modified cellulose-based adsorbent (Cell- g -PGMA-PEI). We aim to improve the adsorbent capacity by reducing side reaction of epoxide ring opening during graft copolymerization of glycidyl methacrylate (GMA) onto cellulose which increases the content of epoxy groups, anchors to immobilize branched PEI moieties. FTIR spectra provided the evidence of successful graft copolymerization of GMA onto cellulose initiated by benzoyl peroxide (BPO) and modification with PEI. The amount of epoxy groups of Cell- g -PGMA was 4.35 mmol g −1 by epoxy titration. Subsequently, the adsorption behavior of Cu(II) on cell- g -PGMA-PEI in aqueous solution has been investigated. The data from the adsorption kinetic experiments agreed well with pseudo-second-order model. The adsorption isotherms can be interpreted by the Langmuir model with the maximum adsorption capacity of 102 mg g −1 which was largely improved compared with the similar adsorbent reported. The dynamic adsorption capacity obtained from the column tests was 119 mg g −1 and the adsorbent could be regenerated by HCl of 0.1 mol L −1 . Results indicate that the novel pathway for the synthesis of Cell- g -PGMA-PEI exhibits significant potential to improve the performance of adsorbents in removal and recovery of Cu(II) from aqueous solution. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013
研究领域:
环境科学
·
高分子化学
·
水处理技术
·
吸附材料
·
重金属去除
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2014
·
IF 4.058
Jie Xie,Zhe Wang,Shaoyong Lu,Deyi Wu,Zhenjia Zhang,Hainan Kong
The adsorption of phosphate from water by two lanthanum hydroxides (LHs), a commercial LH and a synthesized LH from waste alkaline solution, was investigated. The amorphous synthesized LH had higher specific surface area, and showed greater performance for phosphate adsorption than the crystalline commercial LH. The phosphate adsorption data agreed well with the Langmuir model with the calculated maximum capacity of 107.53 mg/g (dry weight) for synthesized LH and 55.56 mg/g (dry weight) for commercial LH, respectively. The affinity toward phosphate was high over a wide pH value range, from about 2.5 to 9.0 for commercial LH and from about 2.5 to 12.0 for synthesized LH, respectively. Release of La was negligible when pH > 4.0. FTIR measurements showed that the monodentate surface species of La-OPO 3 was formed via ligand exchange mechanism. In the coexistence of chloride, nitrate, sulfate and hydrogen carbonate anions, phosphate removal by LHs was only slightly affected. The uptake of phosphate (∼5 mg/L) from real effluent by LHs performs well at a dose of 1 kg/10m 3 , with the removal efficiency exceeding 99% for synthesized LH and 90% for commercial LH, respectively. The adsorbed phosphate could be successfully recovered by hydrothermal treatment in NaOH solution, and the regenerated LHs could be reused for phosphate removal.
研究领域:
环境科学
·
水处理
·
吸附材料
·
稀土化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）