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| 1 | Removal characteristics of microplastics by Fe-based coagulants during drinking water treatment显示文摘Microplastics have caused great concern worldwide recently due to their ubiquitous presence within the marine environment. Up to now, most attention has been paid to their sources,distributions, measurement methods, and especially their eco-toxicological effects. With microplastics being increasingly detected in freshwater, it is urgently necessary to evaluate their behaviors during coagulation and ultrafiltration(UF) processes. Herein, the removal behavior of polyethylene(PE), which is easily suspended in water and is the main component of microplastics, was investigated with commonly used Fe-based salts. Results showed that although higher removal efficiency was induced for smaller PE particles, low PE removal efficiency(below 15%) was observed using the traditional coagulation process, and was little influenced by water characteristics. In comparison to solution pH, PAM addition played a more important role in increasing the removal efficiency, especially anionic PAM at high dosage(with efficiency up to 90.9%). The main reason was ascribed to the dense floc formation and high adsorption ability because of the positively charged Fe-based flocs under neutral conditions. For ultrafiltration, although PE particles could be completely rejected,slight membrane fouling was caused owing to their large particle size. The membrane flux decreased after coagulation; however, the membrane fouling was less severe than that induced by flocs alone due to the heterogeneous nature of the cake layer caused by PE, even at high dosages of Fe-based salts. Based on the behavior exhibited during coagulation and ultrafiltration, we believe these findings will have potential application in drinking water treatment. | Baiwen Ma Wenjing Xue Yanyan Ding Chengzhi Hu Huijuan Liu Jiuhui Qu | 2019 | Journal of Environmental Sciences2019，31，4： | 29 |
| 2 | Sandwich-Like Fe&TiO2@C Nanocomposites Derived from MXene/Fe-MOFs Hybrids for Electromagnetic Absorption显示文摘Electromagnetic pollution has been causing a series of problems in people’s life,and electromagnetic absorbers with lightweight and broad absorbing bandwidth properties are widely desired.In this work,novel sandwich-like 2D laminated Fe&TiO2 nanoparticles@C nanocomposites were rationally designed and successfully developed from the MXene–MOFs hybrids.The formation of Fe and rutile-TiO2 nanoparticles sandwiched by the two-dimensional carbon nanosheets provided strong electromagnetic energy attenuation and good impedance matching for electromagnetic wave(EMW)absorption.As expected,the nanocomposites achieved a broad effective absorption bandwidth of 6.5 GHz at a thickness of only 1.6 mm and the minimum reflection loss(RL)value of−51.8 dB at 6.6 GHz with a thickness of 3 mm.This work not only provides a good design and fabricating concept for the laminated metal and functional nanoparticles@C nanocomposites with good EMW absorption,but also offers an important guideline to fabricate various two-dimensional nanocomposites derived from the MXene precursors. | Baiwen Deng Zhen Xiang Juan Xiong Zhicheng Liu Lunzhou Yu Wei Lu | 2020 | Nano-Micro Letters2020，12，4： | 16 |
| 3 | Lotus Leaf‑Derived Gradient Hierarchical Porous C/MoS2 Morphology Genetic Composites with Wideband and Tunable Electromagnetic Absorption Performance显示文摘Inspired by the nature,lotus leaf-derived gradient hierarchical porous C/MoS2 morphology genetic composites(GHPCM)were successfully fabricated through an in situ strategy.The biological microstructure of lotus leaf was well preserved after treatment.Different pores with gradient pore sizes ranging from 300 to 5μm were hierarchically distributed in the composites.In addition,the surface states of lotus leaf resulted in the Janus-like morphologies of MoS2.The GHPCM exhibit excellent electromagnetic wave absorption performance,with the minimum reflection loss of−50.1 dB at a thickness of 2.4 mm and the maximum effective bandwidth of 6.0 GHz at a thickness of 2.2 mm.The outstanding performance could be attributed to the synergy of conductive loss,polarization loss,and impedance matching.In particularly,we provided a brand-new dielectric sum-quotient model to analyze the electromagnetic performance of the non-magnetic material system.It suggests that the specific sum and quotient of permittivity are the key to keep reflection loss below−10 dB within a certain frequency range.Furthermore,based on the concept of material genetic engineering,the dielectric constant could be taken into account to seek for suitable materials with designable electromagnetic absorption performance. | Fei Pan Zhicheng Liu Baiwen Deng Yanyan Dong Xiaojie Zhu Chuang Huang Wei Lu | 2021 | Nano-Micro Letters2021，13，3： | 9 |
| 4 | Effects of protein properties on ultrafiltration membrane fouling performance in water treatment显示文摘Protein-like substances always induce severe ultrafiltration(UF) membrane fouling. To systematically understand the effect of proteins, regenerated cellulose UF membrane(commonly used for protein separation) performance was investigated in the presence of bovine serum albumin(BSA) under various water conditions. Results showed that although trypsin enhanced the membrane flux via proteolysis, catalysis took a long time. Membrane fouling was alleviated at high solution p H and low water temperature owing to the strong electrostatic repulsion force among BSA molecules. Both Na^+ and Ca^(2+)could increase membrane flux. However, Ca^(2+)played a bridging role between adjacent BSA molecules,whereas membrane fouling was alleviated via a hydration repulsion force with Na+. The order of influence on membrane fouling was as follows: Ca^(2+)concentration > Na+concentration > pH > temperature > trypsin concentration. Furthermore, a polyvinylidene fluoride UF membrane experiment showed that Ca^(2+)could reduce the fouling induced by BSA. Thus, the differences in UF membrane performance will have application potential for alleviating UF membrane fouling induced by proteins during water treatment. | Yanyan Ding Baiwen Ma Huijuan Liu Jiuhui Qu | 2019 | Journal of Environmental Sciences2019，31，3： | 9 |
| 5 | Comparison of the effects of aluminum and iron(Ⅲ)salts on ultrafiltration membrane biofouling in drinking water treatment显示文摘Coagulation plays an important role in alleviating membrane fouling, and a noticeable problem is the development of microorganisms after long-time operation, which gradually secrete extracellular polymeric substances(EPS). To date, few studies have paid attention to the behavior of microorganisms in drinking water treatment with ultrafiltration(UF)membranes. Herein, the membrane biofouling was investigated with different aluminum and iron salts. We found that Al_2(SO_4)_3·18 H_2O performed better in reducing membrane fouling due to the slower growth rate of microorganisms. In comparison to Al_2(SO_4)_3·18H_2O,more EPS were induced with Fe_2(SO_4)_3·x18H_2O, both in the membrane tank and the sludge on the cake layer. We also found that bacteria were the major microorganisms, of which the concentration was much higher than those of fungi and archaea. Further analyses showed that Proteobacteria was dominant in bacterial communities, which caused severe membrane fouling by forming a biofilm, especially for Fe_2(SO_4)_3·x18H_2O. Additionally, the abundances of Bacteroidetes and Verrucomicrobia were relatively higher in the presence of Al_2(SO_4)_3·18 H_2O,resulting in less severe biofouling by effectively degrading the protein and polysaccharide in EPS. As a result, in terms of microorganism behaviors, Al-based salts should be given preference as coagulants during actual operations. | Xing Wang Baiwen Ma Yaohui Bai Huachun Lan Huijuan Liu Jiuhui Qu | 2018 | Journal of Environmental Sciences2018，30，1： | 8 |
| 6 | Rare earths (Ce, Y, Pr) modified Pd/La2O3-ZrO2-Al2O3 catalysts usedin lean-burn natural gas fueled vehicles显示文摘14%REO_x-2.5%La_2 O_3-33.5%ZrO_2-50%Al_2 O_3(RE = Ce, Y, Pr) composites were prepared by a coprecipitation method. The Pd catalysts were obtained by an aqueous solution of Pd(NO_3)_2 loaded on the rare earths modified composites with an initial wet impregnated method. The experiment results show that catalytic activity of the rare earths modified Pd/La_2 O_3-ZrO_2-Al_2 O_3 catalysts is better than bare sample for methane oxidation. The structural characterization results reveal that the rare earths modified Pd catalysts increase amounts of surface active oxygen species by X-ray photoelectron spectroscopy(XPS) analysis and improve the dispersion of active component from H2-temperature programmed reduction(H2-TPR) measurement compared with bare sample. Especially,Pd/14%Y_2 O_3-2.5%La_2 O_3-33.5%ZrO_2-50%Al_2 O_3 sample exhibits highly active stability, it is related to the Pd particles highly dispersion,which was observed by transmission electron microscope(TEM) images. | Haoxin Liu Baiwen Zhao Yusheng Chen Chengdun Ren Yaoqiang Chen | 2017 | Journal of Rare Earths2017，35，11： | 6 |
| 7 | The effects of hydrogen peroxide pre-oxidation on ultrafiltration membrane biofouling alleviation in drinking water treatment显示文摘Pre-oxidation is widely used to reduce ultrafiltration membrane fouling.However,the variation in the composition of microbial communities and extracellular polymeric substances(EPSs) accompanying pre-oxidation in drinking water treatment has received little attention.In this study,hydrogen peroxide(H_2O_2) was used in a coagulationultrafiltration process with Al_2(SO_4)_3·18H_2O.A long-term reactor experiment(60 d) showed that pre-oxidation alleviated membrane fouling,mainly due to its inhibition of microbial growth,as observed by flow cytometry measurements of the membrane tank water.Further analysis of the formed cake layer demonstrated that the corresponding levels of EPS released from the microbes were lower with than without H_2O_2 treatment.In comparison to polysaccharides,proteins dominated the EPS.2 D-electrophoresis showed little difference(p > 0.05,Student's t-test) in the composition of proteins in the cake layer between the treatments with and without H_2O_2.The molecular weights of proteins ranged from approximately 30–50 kDa and the majority of isoelectric points ranged from 6 to 8.Highthroughput sequencing showed that the predominant bacteria were Proteobacteria,Bacteroidetes,and Verrucomicrobia in both cake layers.However,the relative abundance of Planctomycetes was higher in the cake layer with H_2O_2 pre-oxidation,which was likely probably due to the strong oxidative resistance of its cell wall.Overall,our findings clarify the fundamental molecular mechanism in H_2O_2 pre-oxidation for ultrafiltration membrane bio-fouling alleviation in drinking water treatment. | Xing Wang Baiwen Ma Yaohui Bai Huachun Lan Huijuan Liu Jiuhui Qu | 2018 | Journal of Environmental Sciences2018，30，11： | 4 |
| 8 | Pre-oxidation enhanced cyanobacteria removal in drinking water treatment: A review显示文摘Cyanobacterial bloom has many adverse effects on source water quality and drinking water production. The traditional water treatment process can hardly achieve satisfactory removal of algae cells. This review examines the impact of pre-oxidation on the removal of cyanobacteria by solid-liquid separation processes. It was reported that the introduction of chemical oxidants such as chlorine, potassium permanganate, and ozone in algae-laden water pretreatment could improve algae removal by the subsequent solid-liquid separation processes. However, over dosed oxidants can result in more serious water quality risks due to significant algae cell lysis and undesirable intracellular organic matter release. It was suggested that moderate pre-oxidation may enhance the removal of cyanobacteria without damaging algae cells. In this article, effects of moderate pretreatment on the solid-liquid separation processes(sedimentation, dissolved air flotation, and membrane filtration) are reviewed. | Jing Qi Baiwen Ma Shiyu Miao Ruiping Liu Chengzhi Hu Jiuhui Qu | 2021 | Journal of Environmental Sciences2021，33，12： | 3 |
| 9 | Influence of floc dynamic protection layer on alleviating ultrafiltration membrane fouling induced by humic substances显示文摘Cake layer formation is inevitable over time for ultrafiltration(UF)membrane-based drinking water treatment.Although the cake layer is always considered to cause membrane fouling,it can also act as a'dynamic protection layer',as it further adsorbs pollutants and dramatically reduces their chance of getting to the membrane surface.Here,the UF membrane fouling performance was investigated with pre-deposited loose flocs in the presence of humic acid(HA).The results showed that the floc dynamic protection layer played an important role in removing HA.The higher the solution pH,the more negative the floc charge,resulting in lower HA removal efficiency due to the electrostatic repulsion and large pore size of the floc layer.With decreasing solution pH,a positively charged floc dynamic protection layer was formed,and more HA molecules were adsorbed.The potential reasons were ascribed to the smaller floc size,greater positive charge,and higher roughness of the floc layer.However,similar membrane fouling performance was also observed for the negative and positive floc dynamic protection layers due to their strong looseness characteristics.In addition,the molecular weight(MW)distribution of HA also played an important role in UF membrane fouling behavior.For the small MW HA molecules,the chance of forming a loose cake layer was high with a negatively charged floc dynamic protection layer,while for the large MW HA molecules it was high with a positively charged floc dynamic protection layer.As a result,slight UF membrane fouling was induced. | Baiwen Ma Siqi Wu Bodong Wang Zenglu Qi Yaohui Bai Huijuan Liu Jiuhui Qu Ruijun Wu | 2020 | Journal of Environmental Sciences2020，32，4： | 2 |
| 10 | Wave functions and oscillator strengths of high Rydberg alkali atoms by a simple atomic potential model 显示文摘 | LI Baiwen LIU Bingmo CHEN Aiqiu | 1988 | Journal of Physics B1988，21，： | 1 |
| 11 | Microwave multiphoton transition of the Rydberg potassium atom 显示文摘 | LI Yong RAO Jianguo LI Baiwen | 1996 | Physics Letters A1996，23，221： | 1 |
| 12 | Wave functions and oscillator strengths of high Rydberg alkali atoms by a simple atomic potential model显示文摘 | LI Baiwen LIU Bingmo CHEN Aiqiu | 1988 | Journal of Physics B1988，21，12： | 1 |
| 13 | Microwave muhiphoton transition of the Rydberg potassium atom 显示文摘 | LI Yong RAO Jianguo LI Baiwen | 1996 | Physics Letters A1996，23，12： | 1 |
| 14 | Theoretical calculations of Rydberg Stark effect of Hydrogen atom 显示文摘 | RAO Jianguo LI Baiwen | 1997 | Communications in Theoretical Physics1997，27，1： | 1 |
| 15 | Regulation and functional role of eEF1A2 in pancreatic carcinoma显示文摘 | Haixia Cao Qi Zhu Jia Huang Baiwen Li Su Zhang Weiyan Yao Yongping Zhang | 2009 | Biochemical and Biophysical Research Communications2009，，1： | 1 |
| 16 | Effectof iron/aluminum hydrolyzed PreciPitate layer on ultra-filtration membrane显示文摘 | Ma Baiwen Yu Wenzheng Liu Huijuan | 2013 | Desalination2013，330，： | 1 |
| 17 | Quantification of pesticide residues on plastic mulching films in typical farmlands of the North China显示文摘Plastic debris as new pollutants attracts much attention in the recent years.The plastic mulching films is one of the most important plastic debirs source in the environment.The aim of this work was to investigate the current status of pesticide residues on the plastic mulching films.Based on the QuEChERS method,multi-residue methods for detection of pesticide residues with gas chromatography tandem mass spectrum(GC-MS)and high performance liquid chromatography tandem mass spectrum(HPLC-MS)were developed for the analysis of the pesticides residues in plastic film and soil samples from Tianjin,Hebei and Shandong.The total concentrations of pesticide residues were in the range of 86.4-22213.2 ng/g in plastic film debris,which was about 20 times higher than that in soil(9.3—535.3 ng/g).Residual level of pesticides varied greatly in different samples.The historical usage and recent application of pesticides were the main sources for pesticide residues on plastic films and soil.In short,plastic mulching films could act as a sink for pesticides in farmland and the ubiquitous pesticide residues on plastic films should draw more attention. | Baoyuan Guo Jiao Meng Xinyu Wang Chengnan Yin Weiyu Hao Baiwen Ma Zhang Tao | 2020 | Frontiers of Environmental Science & Engineering2020，14，1： | 0 |
| 18 | Chiral mesostructured hematite with temperature-independent magnetism due to spin confinement显示文摘Hematite(α-Fe_(2)O_(3))is known to undergo conversion from weak ferromagnetic to antiferromagnetic as the temperature decreases below the Morin temperature(TM=250 K)due to spin moment rotation occurring during the Morin transition(MT).Herein,we endowed hematite with mesostructured chirality to maintain weak ferromagnetism without MT.Chiral mesostructured hematite(CMH)nanoparticles were prepared by a hydrothermal method with glutamic acid(Glu)as the symmetry-breaking agent.The triangular bipyramidal CMH nanoparticles were composed of helically cleaved nanoflakes with twisted crystal lattice.Field-cooled(FC)magnetization measurements showed that the magnetic moments of CMH were stabilized without MT within the temperature range of 10–300 K.Hysteresis loop measurements confirmed the weak ferromagnetism of CMH.The enhanced Dzyaloshinskii–Moriya interaction(DMI)was speculated to be responsible for the temperature-independent weak ferromagnetism,in which the spin configuration would be confined with canted antiferromagnetic coupling due to the mesostructured chirality of CMH. | Baiwen Zhang Jing Ai Yingying Duan Te Bai Lu Han Shunai Che | 2024 | Nano Research2024，17，3： | 0 |
| 19 | Calculation of the Energy Spectra of Atom Rb in Strong Magnetic Fields显示文摘The energy spectra and oscillator strength of atom Rb in strong magnetic fields are calculated.The wavefunctions obtained by an improved potential model proposed by some of us are chosen as the zero-order ones.The results show that the diamagnetic term seems to affect substantially only high Rydberg states.And there is a maximum of oscillator strength in each n-manifold,which varies with n increased. | LIU Lianjun ZHANG Zhehua GAO Daoneng CAO Yaohui HE Xinghong LI Baiwen | 1993 | Chinese Physics Letters1993，10，7： | 0 |
| 20 | Hydrogen peroxide as a systemic messenger in the photosynthetic induction of mulberry leaves显示文摘Mulberry(Morus alba L.)seedlings were used to test hydrogen peroxide(H_(2)O_(2))as a potential systemic messenger in photosynthetic induction.The upper leaf of mulberry was dark-adapted for 45 min and then illuminated with photosynthetically active radiation(PAR)of1000μmol m^(-2)s^(-1).Photosynthetic induction and H_(2)O_(2) content in the lower leaf was measured.The results show that pre-illumination of the upper leaf promoted photosynthetic induction and increased endogenous H_(2)O_(2) in the lower leaf.Without pre-illuminating upper leaf,exogenous H_(2)O_(2) treatment on the lower leaf promoted photosynthetic induction.The application of diphenyleneiodonium and trichloroacetic acid on petioles of the upper leaf inhibited H_(2)O_(2) increase in the lower leaf,indicating that H_(2)O_(2) transport was from upper leaves to lower leaves through the phloem.The results show that H_(2)O_(2) might serve as a signal messenger to promote rapid induction of photosynthesis of leaves in lower parts of the canopy and enable plants to use light energy more efficiently. | Wei Li Geng Chen Yujiao Fang Tao Wang Yixiong Wu Yue Wu Xinmeng Liu Baiwen Jiang | 2021 | Journal of Forestry Research2021，32，3： | 0 |
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