JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2024
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IF 5.9
Guohao Zhai,Yuxuan Ma,Huixian Liu,Hongtao Jia,Shanshan Wang,Shuai Liu
Sulfadiazine (SDZ) is an antibiotic frequently detected in natural water environments and wastewater treatment systems. Its accumulation and residue in aquatic seriously impact ecosystems and human health. Pedicularis kansuensis (PK) is an invasive species that seriously impacts the production of agriculture, forestry, and animal husbandry due to its strong adaptability and fast diffusion speed. In order to transform exotic noxious weeds into valuable resources, Pedicularis kansuensis biochar (PKBC) was prepared by pyrolyzing the stems of PK at 500 °C to adsorb SDZ effectively. The results demonstrated that the biochar material exhibited a plate-like morphology with a large specific surface area, which provided numerous adsorption sites and was conducive to SDZ adsorption. The pH value significantly affects the adsorption of SDZ on PKBC-500, with better adsorption performance in acidic environments. The adsorption capacity of PKBC for SDZ was determined to be 6.87 mg/L. The adsorption kinetics and isotherms were analyzed, and the pseudo-second-order kinetic better fitted the adsorption process of SDZ. The Freundlich equation was more appropriate for explaining the adsorption process. In summary, biochar adsorption of antibiotics was prepared using PK pyrolysis. Its raw material is inexpensive and can effectively adsorb SDZ while solving the problem of invasive plant management.
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
International Journal of Environmental Research and Public Health
·
2021
·Vol. 18
·期 24
·13383
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IF 3.39
Ziwen Xu,Shiquan Lv,Shuxiang Hu,Liang Chao,Fangxu Rong,Xin Wang,Mengyang Dong,Kai Liu,Mingyue Li,Aiju Liu
Paddy soils are globally distributed and saturated with water long term, which is different from most terrestrial ecosystems. To better understand the environmental risks of antibiotics in paddy soils, this study chose sulfadiazine (SDZ) as a typical antibiotic. We investigated its adsorption behavior and the influence of soil solution properties, such as pH conditions, dissolved organic carbon (DOC), ionic concentrations (IC), and the co-existence of Cu2+. The results indicated that (1) changes in soil solution pH and IC lower the adsorption of SDZ in paddy soils. (2) Increase of DOC facilitated the adsorption of SDZ in paddy soils. (3) Cu2+co-existence increased the adsorption of SDZ on organic components, but decreased the adsorption capacity of clay soil for SDZ. (4) Further FTIR and SEM analyses indicated that complexation may not be the only form of Cu2+and SDZ co-adsorption in paddy soils. Based on the above results, it can be concluded that soil solution properties and co-existent cations determine the sorption behavior of SDZ in paddy soils.Keywords:sulfadiazine;Cu2+co-existence;paddy soils;adsorption;soil properties
研究领域:
环境科学
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土壤学
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL TECHNOLOGY
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2023
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IF 2.8
Zhiwei Zhou,Ruixin Zhang,Yanling Yang,Xing Li,Jiawei Ren
Natural organic matter (NOM) can impede the removal of organic micro-pollutants (OMPs) through several mechanisms, including inner filter effect, competition with the target OMP, and radical scavenging, during synchronous adsorption/photocatalysis of multi-functional composites. In this study, the fate and inhibitory mechanisms of sulfamerazine (SMZ, a model OMP) that occurred in presence of seven different NOM samples (i.e. three standard NOM surrogates, a river water sample, a carbon filter effluent and two different sand filter effluents) during the adsorption/photocatalysis by a composite of Bi2O3-TiO2 supported on powdered activated carbon (Bi2O3-TiO2/PAC, abbreviated as BTP) when exposed to visible light irradiation were revealed. The results indicated that adsorption played a greater attribution than photocatalysis on SMZ removal. The primary impediment to the adsorption and photocatalytic degradation of SMZ was attributed to the presence of terrestrial-derived, humic-like NOM fractions with high aromaticity. The adsorption efficacy of SMZ was weakened by the absorption of NOM and its degradation products onto the BTP surface. The inner filter effect, competition between NOM and SMZ, and radical scavenging were responsible for the reduced photocatalysis of SMZ. In the cases of real water matrices, the presence of inorganic anion and co-existed NOM reduced the removal of SMZ. In summary, the findings of this work offer a comprehensive comprehension of the impact of NOM fractions on photocatalysis, emphasizing the necessity to examine the interplay between NOM and background inorganic constituents in the degradation of OMP via adsorption/photocatalysis.
研究领域:
环境科学
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水处理技术
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产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
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2022
·
IF 7.968
Taiqing Wei,Yang Meng,Dan Ai,Chi Zhu,Bo Wang
This study used biochar as the substrate of the electrodes, and a simple synthetic process (ball milling) was adopted to prepare the Fe 3 O 4 @biochar cathode enhanced coupled system of electrochemistry-potassium persulfate to achieve the efficient removal of sulfadiazine. Studies showed that the cracking temperature of biochar and the iron-to-carbon mass ratio determined the catalytic performance of cathodes. In addition, ball milling increased the surface functional groups of biochar and promoted the dispersion of Fe 3 O 4 on biochar, leading to increased active sites on the Fe 3 O 4 @biochar cathode surface. It was found that SDZ and TOC removal rates reached 95.3% and 86.9% in the coupled system of electrochemical-persulfate with SDZ concentration of 10 mg/L, initial pH 0 of 7, PDS concentration of 4 mM, current density of 30 mA/cm 2 , and electrode plate spacing of 4 cm. Also, this system showed excellent removal of sulfadiazine in actual water bodies. The quenching experiments and electron paramagnetic resonance spectra revealed that free radicals and non-radicals were involved in removing sulfadiazine, with free radicals (SO 4 •− ) being the dominant pathway. Four main degradation pathways were proposed based on the intermediates of sulfadiazine. In conclusion, Fe 3 O 4 @biochar cathode enhanced coupled system of electrochemical-persulfate could be regarded as an efficient cleaning technology to provide a method for the removal of intractable organic pollutants .
研究领域:
环境科学
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水处理技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2020
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IF 10.652
Yong Chen,Zhao Yang,Yunbo Liu,Yong Liu
In this paper, a novel Fenton-like system was constructed by a new catalyst (CNTs-Fe-Cu) combined with Al 0 -CNTs to in situ generate H 2 O 2 from activating O 2 for the degradation of sulfamerazine (SMR). The CNTs-Fe-Cu composite was prepared and characterized by XRD, SEM, EDS and BET methods. The results showed that H 2 O 2 could be generated in-situ by Al 0 -CNTs composite under oxygen aeration, which was then converted to OH and O 2 − radical by CNTs-Fe-Cu composite. The high removal efficiency of SMR could be obtained in Al 0 -CNTs/CNTs-Fe-Cu/O 2 system at a relatively broad range of pH. Furthermore, the removal efficiency of SMR and total organic carbon (TOC) was 85% and 60%, respectively under the following condition: initial pH = 5.8, T = 25 °C, O 2 flow rate = 400 mL/min, CNTs-Fe-Cu = 1 g/L, Al 0 -CNTs = 1 g/L, SMR = 50 mg/L, reaction time = 60 min. In addition, the intermediate products of SMR degradation were identified and the possible degradation pathways of SMR and the degradation mechanism of Al 0 -CNTs/CNTs-Fe-Cu/O 2 process were tentatively proposed.
研究领域:
环境科学
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化学工程
✓ 已验证
DOI
高影响因子
CHEMICAL PHYSICS LETTERS
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2019
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IF 1.901
Hui Li,Lunchao Duan,Hong Wang,Yajun Chen,Fenghe Wang,Shengtian Zhang
The photolytic behaviour of sulfadiazine (SD) under ultraviolet (UV) radiation was investigated. The results showed that the SD photolysis fitted quasi-first-order kinetics model. The acid condition is favourable to the UV photolysis of SD because of more free radicals compared to the neutral and cationic conditions. NO 3− inhibited the SD photolysis, which may be resulted from the competition of NO 3− with SD for UV. Conversely, Cd 2+ could promote the SD photolysis, because the metal ions reduce the reaction activation energy of the rate determining step. This research could serve as reference for SD photolysis contained in wastewater under UV radiation.
研究领域:
环境科学
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药学
✓ 已验证
产品关联
DOI
高影响因子
BIORESOURCE TECHNOLOGY
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2019
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IF 6.669
Weiwei Huang,Fei Yang,Wenli Huang,Zhongfang Lei,Zhenya Zhang
In this study, the feasibility of Fe 0 addition for driving sulfadiazine (SDZ) removal during anaerobic digestion of swine manure (SM) was tested. Compared with the Fe 0 -free digesters spiked with 200 mg/L SDZ (R SDZ ), treatments with 5.0 g/L Fe 0 (R SDZ/Fe 0 ) significantly accelerated and optimized the acidification process by enriching Clostridia and Bacteroidia (key members responsible for VFAs/H 2 production), providing more readily available substrates for methanogenesis. Furthermore, Fe 0 increased the overall abundance of hydrogenotrophic methanogens, specifically toxicant resistant Methanoculleus and Methanosphaera spp. were selectively enriched, helping achieve a 36.9% higher CH 4 yield and a 26.4% greater total solids removal efficiency. A positive correlation between the solid content and the SDZ concentration adsorbed in SM was observed. The addition of Fe 0 increased the distribution of SDZ in liquid and facilitated its removal through the enhanced biodegradation and physicochemical processes. Overall, the total SDZ removal efficiency was improved by 86.8% with Fe 0 .
研究领域:
环境科学
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微生物学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2022
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IF 14.224
Na Chen,Ying Zhao,Meiqi Li,Xiaobing Wang,Xing Peng,Hongwei Sun,Lizhi Zhang
Safe treatment of antibiotics requires efficient removal of both antibiotics and their degraded intermediates. In this study, we demonstrate that FeC 2 O 4 •2H 2 O enables the more sustainable conversion of H 2 O 2 to • OH than commonly used FeSO 4 •7H 2 O, promoting the detoxification of a typical antibiotic sulfadimidine. It was found that the FeC 2 O 4 /H 2 O 2 system could completely degrade 250 mg L −1 of sulfadimidine within 40 min at pH 3.0, along with decreasing the contents of chemical oxygen demand and total organic carbon by 295.0 and 33.5 mg L −1 , respectively, more efficient than those in a classical Fenton system (FeSO 4 /H 2 O 2 ). Analysis of sulfadimidine degraded intermediates and toxicity evaluation suggested that the FeC 2 O 4 /H 2 O 2 treatment could more effectively decrease the overall toxicity of the sulfadimidine solution than the FeSO 4 /H 2 O 2 counterpart. The sustainability of FeC 2 O 4 •2H 2 O in H 2 O 2 conversion to • OH was attributed to its controlled release of Fe 2+ into the solution to prevent the quenching of • OH by excessive Fe 2+ , as well as the simultaneous release of C 2 O 4 2− to complex with Fe 2+ and Fe 3+ , which could inhibit iron sludge formation and accelerate Fe 3+ /Fe 2+ redox cycle. This study provides a promising Fenton system for the safe treatment of antibiotics and sheds light on the potential of FeC 2 O 4 •2H 2 O in environmental remediation.
研究领域:
环境科学
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化学工程
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生物学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
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IF 9.965
Xiaolong Hu,Jingyu Bao,Daiwen Chen,Syed Jalil Shah,Sidra Subhan,Wenxue Gong,Wenyuan Li,Xinqi Luan,Zhongxing Zhao :,Zhenxia Zhao
In the photo-Fenton reactions, fast recombination of photoinduced electrons and holes in Fe-based metal–organic frameworks (Fe-MOFs) slows Fe(III)/Fe(II) cycle, which remains big challenge that significantly retards the overall process. Herein, NH 2 -MIL-88B(Fe) (NM88) was modified with 3,5-diaminobenzoic acid (DB) and TPB-DMTP-COF (COF-OMe) to in situ construct NM88(DB) 0.85 /COF-OMe composite that could strongly harvest the visible light for photo-Fenton degradation of sulfamerazine (SMR). With the addition of DB, electron-donating effect of NM88 was strengthened, which then promoted amino groups to react with aldehyde groups (Schiff-base), and thus highly facilitated the interfacial contact between NM88 and COF-OMe. Such modifications increased the degradation rate constants for NM88(DB) 0.85 /COF-OMe to 15.1 and 17.3 times that of NM88 and COF-OMe respectively with good reusability. Moreover, the catalyst exhibited 32–170 times higher degradation kinetics in comparison to other reported catalysts. Results showed that due to the Schiff-base reaction between NM88(DB) and COF-OMe, electron density on Fe(III) was decreased; and the photogenerated electrons of COF-OMe moved to NM88(DB) to reduce Fe(III), thus resulting in the generation of highly active Fe(II) and ·OH species. Furthermore, the main reactive species were determined to be ·OH and ·O 2 – by trapping experiments, and a possible mechanism of the degradation system followed Z-scheme charge transfer.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
PubMed
高影响因子
ENVIRONMENTAL RESEARCH
·
2020
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IF 5.715
Qingmei Meng,Yanli Zhang,Di Meng,Xinpeng Liu,Zijian Zhang,Peiling Gao,Aiguo Lin,Lian Hou
Phosphoric acid is used to in-situ activate biochar pyrolyzed by cotton shells to enhance the adsorption ability of sulfadiazine (SDZ). To confirm the optimum condition, different impregnation ratios and impregnation times were investigated. It was found that the biochar (BC) pyrolyzed under the condition of an impregnation ratio of 2.5 and an impregnation time of 6 h showed the highest performance for the removal of SDZ. The maximum adsorption ability was 86.89 mg/g at a temperature of 298 K. The pseudo-second-order model was used to disclose the adsorption process of SDZ by BCs. The experimental data were described by the Langmuir and Temkin isotherms at different temperatures. It was found that the sorption of SDZ was an exothermic process according to the thermomechanical analysis. The activated BC could be recycled for at least five times with a high removal rate of SDZ. Thus, activated BCs are regarded as promising adsorbents for SDZ removal.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2017
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IF 6.198
Na Chen,Yahui Huang,Xiaojing Hou,Zhihui Ai,Lizhi Zhang
Biochar, mainly including pyrochar produced via pyrolysis of biomass at moderate temperatures of 350–700 °C and hydrochar formed by hydrothermal carbonization in a range of 150–350 °C, has received increasing attention because of its significant environmental impacts. It is known that pyrochar can generate reactive oxygen species even in the dark owing to the presence of persistent free radicals, but hydrochar is far less studied. In this study, we systematically investigate the photochemistry of hydrochar and check its effects on the sulfadimidine degradation. Different from pyrochar derived from the same biomass, hydrochar could generate much more H2O2 and •OH under daylight irradiation, which could enhance the sulfadimidine degradation rate six times more than that found in the dark. Raman spectroscopy, Fourier transform infrared spectroscopy, electron paramagnetic resonance, and X-ray photoelectron spectroscopy were employed to elucidate this interesting phenomenon. Characterization results revealed that the higher reactive oxygen species generation ability of hydrochar under solar light irradiation was attributed to its abundant photoactive surface oxygenated functional groups. This study clarifies the differences of pyrochar and hydrochar on organic pollutant degradation, and also sheds light on environmental effects of hydrochar.
研究领域:
环境科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Chen Ling,Shuai Wu,Tailu Dong,Haifan Dong,Zhengxiao Wang,Yuwei Pan,Jiangang Han
Sulfide-modified zero-valent iron (S-Fe 0 ) is regarded as a promising method to enhance the catalytic activity of Fe 0 for peroxymonosulfate (PMS) activation. However, the roles of sulfidation and the application of the sulfidation treatment method are worth to further investigation. In our study, the effects of the S/Fe ratio, Fe 0 dosage, and initial pH on sulfadiazine (SDZ) removal were investigated. The characterization of S-Fe 0 with SEM, XPS, contact angle and Tafel analysis confirmed that the formation of sulfur species on the Fe 0 surface could enhance the catalytic performance of Fe 0 . S 2− played the major role and SO 3 2- played the minor role in accelerating the conversion of Fe 3+ to Fe 2+ . EPR tests, radical quenching and quantitative determination experiments identified • OH as playing the major role and SO 4 •− also playing an important role in SDZ removal in S-Fe 0 /PMS system. Sulfidation produced no notable change in the role of • OH and SO 4 •− . A possible degradation pathway of SDZ was proposed. Effect of sulfidation on various sizes of Fe 0 was also studied which demonstrated that the smaller sizes of Fe 0 (< 8 µm) were more effective in the sulfidation method treatment. S-Fe 0 /PMS system also showed a good performance in removing antibiotics in natural fresh water.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）