ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
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2023
·
IF 6.8
Jie Wang,Chunyan Wu,Xing Zhang,Yuanyuan Song,Binquan Wang,Ke Zhang,Mingkuan Sun
As a result of the ban on bisphenol A (BPA), a hormone disruptor with developmental neurotoxicity, several BPA derivatives (BPs) have been widely used in industrial production. However, there are no effective methods for assessing the neurodevelopmental toxic effects of BPs. To address this, a Drosophila exposure model was established, and W 1118 was reared in food containing these BPs. Results showed that each BPs displayed different semi-lethal doses ranging from 1.76 to 19.43 mM. Exposure to BPs delayed larval development and affected axonal growth, resulting in the abnormal crossing of the midline of axons in the β lobules of mushroom bodies, but the damage caused by BPE and BPF was relatively minor. BPC, BPAF, and BPAP have the most significant effects on locomotor behavior, whereas BPC exhibited the most affected social interactions. Furthermore, exposure to high-dose BPA, BPC, BPS, BPAF, and BPAP also significantly increased the expression of Drosophila estrogen-related receptors. These demonstrated that different kinds of BPs had different levels of neurodevelopmental toxicity, and the severity was BPZ > BPC and BPAF > BPB > BPS > BPAP ≈ BPAl ≈ BPF > BPE. Therefore, BPZ, BPC, BPS, BPAF, and BPAP should be evaluated as potential alternatives to BPA.
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SCIENCE OF THE TOTAL ENVIRONMENT
·
2023
·
IF 9.8
Tian Yuxuan,Chen Xin,Ding Ning,Liu Hong
The adsorption micelle flocculation (AMF) effect of biosurfactants (rhamnolipids, RL) and polymerized ferric sulfate (PFS) on the removal of low molecular weight benzoic acid (benzoic acid and p -methyl benzoic acid) and phenol (2,4-dichlorophenol and bisphenol A) organics was investigated. The coexistence system of RL and organic matter was constructed, and the effects of pH, Fe concentration, RL concentration and initial concentration of organic matter on the removal effect were discussed. For benzoic acid and p -methyl benzoic acid, the increase of Fe and RL concentrations was beneficial to their removal rates under weak acidic conditions, and the removal rate of the coexistence system was higher for methyl benzoic acid (87.7 %) than for benzoic acid (78.6 %), which might be attributed to the stronger hydrophobicity of the coexistence system for methyl benzoic acid; while for 2,4-dichlorophenol and bisphenol A, pH and Fe concentration changes had less effect on the removal rate, but the increase in RL concentration was favorable to the removal rate, which was 93.1 % and 86.7 % for BPA and 2,4-dichlorophenol, respectively. These findings provide feasible ideas and directions for the removal of organics by AMF using biosurfactants.
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JOURNAL OF HAZARDOUS MATERIALS
·
2023
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IF 13.6
Liwei Yang,Fashan Yang,Heng Zhang,Hongyu Zhou,Mengfan Luo,Yunmei Liu,Chuanliang Zhao,Lu Zheng,Bo Lai
At present, the potential mechanism of manganese oxide (MnO 2 ) activation of PI and the key active sites of PI activation are still unclear and controversial. To this end, three different crystal forms of MnO 2 were prepared in this study and used to activate PI to degrade pollutants. The results showed that different crystal types of MnO 2 showed different catalytic abilities, and the order was γ-MnO 2 > α-MnO 2 > β-MnO 2 . Through quenching experiments, EPR tests, Raman experiments and in situ electrochemical experiments, it has been confirmed that electron transfer-mediated non-free radical process is the main mechanism of pollutant degradation , in which the active substance is the highly active metastable intermediate complex (MnO 2 /PI*). Hydroxyl radical (HO • ), superoxide radical (O 2 •− ), singlet oxygen ( 1 O 2 ) and iodine radical (IO 3 • ) did not participate in pollutant degradation. The quantitative structure-activity relationship analysis confirmed that the catalytic performance of MnO 2 was highly positively correlated with the surface Mn(IV) content, which indicated that the surface Mn(IV) site was the main active site. Overall, this study will be of great help to the design and application of manganese dioxide activation for periodate degradation of pollutants.
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FOOD CHEMISTRY
·
2023
·
IF 8.8
Yukun Yang,Xiaoxing Zeng,Yu Tian,Xiaomin Wang,Xu Jing,Ligang Yu,Baoqing Bai,Jinhua Zhang,Shu Qin
A universal design of turn-on fluorescent aptasensor based on aptamer functionalized gold nanoparticles (AuNPs) and luminescent metal–organic frameworks (LMOFs) complex (AuNPs-Apt/NH 2 -MIL-125(Ti)) was realized for bisphenol A (BPA) detection. LMOF NH 2 -MIL-125(Ti) was prepared using facial hydrothermal method. BPA aptamer functionalized AuNPs were prepared and adsorbed on the surface of NH 2 -MIL-125(Ti) to obtain platform of the fluorescent aptasensor. The fabrication process, sensing performance and applicability of the proposed aptasensor were characterized and investigated carefully. Linear detection range of the constructed aptasensor was from 1 × 10 –9 mol L –1 to 1 × 10 –4 mol L –1 with good selectivity, repeatability, stability and reproducibility under optimal experimental conditions. Meanwhile, the fluorescent aptasensor was successfully utilized for BPA detection in real samples with the recoveries of 95.80%-103.12%. The proposed aptasensor based on AuNPs-Apt/NH 2 -MIL-125(Ti) holds significant potential for BPA detection in environmental and food samples, promoting the construction and application of LMOFs-based aptasensor.
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CHEMICAL ENGINEERING JOURNAL
·
2023
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IF 15.1
Baokang Xu,Xiao Zhang,Yue Zhang,Shiwen Wang,Peng Yu,Yongjun Sun,Xi Li,Yanhua Xu
The nonradical pathway selectively oxidizes pollutants with less interference from environmental factors, which can effectively improve the environmental suitability of peroxymonosulfate (PMS) activation. Herein, a Co-doped nanotubular carbon nitride catalyst (Co-CNNT) based on CoN x sites was constructed for stable and efficient PMS activation with a better specific surface area, number of CoN x sites, and electron transfer capability than Co-doped lamellar carbon nitride catalyst (Co-CN). Co-CNNT improved PMS utilization efficiency (∼50%) and enhanced the contribution of the electron transfer pathway to tetracycline (TET) degradation. The enhanced ability of Co-CNNT to adsorb PMS leads to Co-CNNT–PMS* generated by PMS at the CoN x site, which raises the Co-CNNT surface potential and allows PMS to be activated in a manner that captured electrons. Thus, the Co-CNNT/PMS system could effectively destroy electron-rich or low-potential pollutants within 24 min. The stronger environmental adaptability allows it to maintain catalytic activity in complex aqueous matrices, achieving effective oxidation of diluted tetracycline-based pharmaceutical wastewater. This paper reveals the effects of carbon nitride morphology control strategies on the properties of CoN x active sites and PMS activation mechanisms, providing new insights into the induction of nonradical PMS activation pathways.
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Biochar
·
2023
·Vol. 5
·期 1
·1-18
·
IF 12.7
Wang Shulian,Huang Yan,Ma Shuanglong,Zhan Sihui,Wang Jingzhen,Gao Boqiang,Tang Xiaodan,Zhu Qiuhui,Xu Shengjun,Zhuang Xuliang
Metal-free porous biochars are popularly utilized as catalysts for peroxydisulfate (PDS) activation. The enhancement effect of PDS activation of porous biochars fabricated by employing both hard template and alkali metal activating agent has not been explored completely. In addition, the role of the inherent carbon defect in PDS activation has not been clearly elucidated. Hence, a series of carbonaceous catalysts were fabricated using a sole template (KCl), a sole activating agent (Na 2 S 2 O 3 ) or a combination of template and activating agent (KCl/Na 2 S 2 O 3 , KCl/KHCO 3 , KCl/NaHCO 3 , and KCl/Na 2 C 2 O 4 ), to systematically investigate the effect of specific surface area (SSA) and intrinsic defect of porous biochar on its PDS activation ability. The biochar synthesized by KCl and Na 2 S 2 O 3 (SK-C) exhibited the optimum degradation performance. The SK-C was found to possess an interconnected hollow cage with three-dimensional mesh structure showing the largest surface area, pore volume and C- sp 3 edge defect content among all the catalysts, which explained its paramount catalytic ability. The SSA and C- sp 3 content together can determine the catalytic performance in a quantitative relationship. The single electron transfer pathway from SDZ to inner-sphere bound SK-C/PDS* was the protagonist of pollutant oxidation. The degradation intermediates were detected and recognized and their toxicities were evaluated. This study for the first time comprehensively identified the synergistic effect between the SSA and inherent defects on improving the catalytic performance of biochar for PDS activation to removal contaminants. Graphical Abstract
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MICROCHEMICAL JOURNAL
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2023
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IF 4.8
Zhefei Hu,Yanhao Jiang,Panpan Cao,Yanjuan Liu,Yuefei Zhang,Wei Chen,Sheng Tang
In this work, 2-undecylimidazole (UI) and propyl methacrylate (PMA) dual-functionalized silica gel was prepared and applied as a mixed-mode chromatographic stationary phase. Successful preparation of this stationary phase (SiO 2 -UI-PMA) was proved through a range of characterization techniques. The chromatographic performance of the obtained SiO 2 -UI-PMA was investigated for the separation of environmental endocrine disruptors (phthalates, steroid hormones, bisphenols and alkylphenols), sulfonamides and food-borne stimulants in reversed-phase chromatography, as well as for the separation of inorganic anions in anion-exchange chromatography. The effect of column temperature, acetonitrile content, salt concentration and mobile phase pH on retention was studied to explore the separation mechanism, and the results indicated that this stationary phase provided multiple interactions with analytes. Compared with the commercial C18 column, the SiO 2 -UI-PMA demonstrated more preferable separation ability under the mobile phase conditions with a low content of acetonitrile, thereby acting as a good alternative candidate for the conventional reversed-phase stationary phase in chromatographic analysis. Furthermore, the SiO 2 -UI-PMA stationary phase exhibited high column efficiency (45 860 plates m −1 for progesterone) even though it was prepared from the non-serviceable silica based chromatographic packing materials.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Jingyu Zhang,Yan Wang,Mei Hong,Bin Peng,Chunyang Bao,Xiaoling Xu,Die Li,Jing Chen,Bingyu Wang,Qiang Zhang
As a classical advanced oxidation technology, the Fenton reaction is often criticized for having a narrow pH window, difficult recovery of catalysts, and generating iron-containing sludge. Furthermore, traditional Fenton reaction was also limited in treating high salinity wastewater. In this work, a ferrocene-containing resin is prepared and used as the heterogeneous catalyst for a Fenton-like reaction to treat different organic pollutants wastewaters in high salinity conditions under a wide pH range. Using ascorbic acid as a reducing agent, the Fenton-like reaction can degrade different organic pollutants such as methylene blue, bisphenol A, bisphenol S, tetracyclines, and 4-nitrophenol within 10 min in high salinity conditions (500 mmol/L) at a wide range of pH values from acidic to basic. In mechanism investigation, singlet oxygen and superoxide radicals were identified as the primary reactive oxygen species. It was straightforward to recover the resin from water, and the degradation ratio exceeded 99% in five consecutive experiments. Such a Fenton-like reaction could also efficiently regenerate the resins to restore their adsorption capacity without using acid, base, or organic solvents.
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MICROCHIMICA ACTA
·
2023
·Vol. 190
·期 4
·1-9
·
IF 5.7
Tu Xinman,Deng Lamei,Ren Boyuan,Xu Zihan,Zhang Li
A conventional colorimetric method based on CuS-catalyzed H 2 O 2 is improved by a dual-modification strategy and employed for thioglycolic acid (TGA) determination. The doping of Co(II) can enhance ion exchange efficiency. Meanwhile, the modification of g-C 3 N 4 can increase specific surface area and decrease unspecific aggregation. The constructed g-C 3 N 4 /Co-CuS nanocomposite exhibited a favorable catalytic feature. A Michaelis constant (K m ) value of 0.02 mM has been achieved, which is 1/160 of those of CuS and horseradish peroxidase (HRP). The g-C 3 N 4 /Co-CuS displays a rapid color response in 3 min and resulted in a stable measurable signal within 10 min. In the determination procedure, the sulfhydryl contained in TGA is capable of preventing TMB oxidation via competing the · OH produced by catalysis and caused a color distinction that is related to the TGA amount. The distinctions of absorbance (λ max = 652 nm) of different concentrations of TGA are recorded. Linearity is obtained in the ranges of 2.5 – 20 µM and 20 – 160 µM, and the LOD is 0.14 µM. In the real sample assays of perm agent and Qianhu lake water, the recoveries were 96.70 – 106.84% and 100.21 – 101.90%, respectively. This demonstrates that the proposed dual-modification strategy for CuS contributes to highly efficient and convenient determination of TGA in daily cosmetics and water analysis. Graphical Abstract
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2023
·
IF 22.1
Xinhao Wang,Zhaokun Xiong,Hongle Shi,Zelin Wu,Bingkun Huang,Heng Zhang,Peng Zhou,Zhicheng Pan,Wen Liu,Bo Lai
Rationally regulating reaction mechanisms in Fenton-like reactions by tuning the properties of catalysts is of great significance, but still challenging. Herein, we synthesized various active center size-dependent catalysts to realize the switching of reaction mechanisms and pollutant degradation routes in peroxymonosulfate (PMS) activation systems. The results illustrated that the reaction mechanism transformed from radical oxidation (51.64%) to nonradical oxidation (89.92%) with the decrease of active center size from nanoparticle (Co NP -NC) to single atom (Co SA -NC). The evolution of reactive species switched the degradation intermediates and pathway of sulfisoxazole (SIZ). The generation of singlet oxygen ( 1 O 2 ) in Co SA -NC/PMS tends to selectively attack electron-rich site of SIZ, while reaction between radicals and SIZ prefers non-selective oxidation in Co NP -NC/PMS system. Besides, the toxicity tests indicated that the conversion from non-selective to selective oxidation resulted in lower toxicity of effluent after reaction, which can further reduce environmental risks of effluent.
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JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2023
·
IF 8.7
Haijian Xie,Jiawei Wu,Mengzhen Yu,Huaxiang Yan,Shakil Masum,Peifu Cai,Yun Chen
Bisphenol A (BPA) is a toxic endocrine disruptor often found in landfill leachate . Adsorption behaviors and mechanisms of BPA onto organo-bentonites amended loess , e.g., Hexadecyltrimethylammonium chloride-bentonite (HTMAC-B) and Carboxymethylcellulose-bentonite (CMC-B) were experimentally investigated. The adsorption capacity of loess amended by HTMAC-B (LHB) and CMC-B (LCB) is 4.2 and 4 times greater than that of loess (L), respectively. It is attributed to the increase of hydrogen bonds and hydrophobic lateral interactions between the adsorbent and the adsorbate. The binary (Pb 2+ -BPA) systems may enhance BPA adsorption onto the samples by the formation of coordination bonds between the hydroxyl group of BPA and Pb 2+ ions. A cycled column test was used for investigating the transport behavior of BPA in LHB and LCB samples. The hydraulic conductivity of loess amended by the organo-bentonite (e.g., HTMAC-B, CMC-B) is generally lower than 1 × 10 −9 m/s. Especially for CMC-B amended loess, the hydraulic conductivity can be reduced to 1 × 10 −12 m/s. This guarantees the hydraulic performance of the liner system. Transport behavior of BPA in cycled column test is explained by the mobile-immobile model (MIM). Modelling results showed that loess amended by organo-bentonites can increase the breakthrough time of BPA. In comparison to loess-based liner, the breakthrough time of BPA for LHB and LCB can be increased by a factor of 10.4 and 7.5, respectively. These results indicate that organo-bentonites can serve as a potentially effective amendment for improving the adsorption of loess-based liners.
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CHEMOSPHERE
·
2023
·
IF 8.8
Yongli Liu,Yue Zhang,Jingwen Niu,Linchun Nie,Shiyu Huang,Huanhuan Liu,Shuai Yuan,Qingxiang Zhou
Bisphenol A (BPA) is an endocrine disrupting chemical and poses a grave threat to the human health. Herein, a fluorescent probe constructed with molecularly imprinted polymers decorated carbon dots (CDs@MIPs) was proposed for determination of BPA with high selectivity . The CDs@MIPs were constructed using BPA, 4-vinylpyridine and ethylene glycol dimethacrylate as template, functional monomer and cross linker, respectively. The obtained fluorescent probe not only owned a highly selective recognition function derived from MIPs but also displayed an excellent sensitivity for sensing BPA stemmed from CDs. The fluorescence intensity of CDs@MIPs was varied before and after the removal of BPA templates. The fluorescent decrease fraction of the fluorescent probe demonstrates a nice linearity in BPA concentration range of 10–2000 nM (r 2 = 0.9998) and the detection limit is as low as 1.5 nM. The fluorescent probe was triumphantly utilized to sense the level of BPA in real aqueous and plastic samples with good results. Moreover, the fluorescent probe offered a wonderful means for fast identification and sensitive detection of BPA from environmental aqueous samples.
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