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Steam disinfection enhances bioaccessibility of metallic nanoparticles in nano-enabled silicone-rubber baby bottle teats,pacifiers,and teethers

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Journal of Environmental Sciences 2024年第2期136卷 161-171页

作者： Yu Su BinWang Xin Tong Shuchuan Peng Sijin Liu baoshan xing Rong Ji State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023China School of Resources and Environmental Engineering Hefei University of TechnologyHefei 230009China State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Stockbridge School of Agriculture University of MassachusettsAmherstMA 01003USA

Nano-enabled silicone-rubber articles for feeding or chewing could be a source of metallic nanoparticles(NPs)directly exposed to infants and young ***,the impact of steam disinfection on release of NPs and the related potential risks to children's health are ***,we investigated contents and form of Ag and Zn in 57 nano-enabled silicone-rubber baby bottle teats,pacifiers,and teethers of seven countries and examined the impacts of steam disinfection on in vitro bioaccessibility(IVBA)of Ag and Zn in the *** 89%articles had a mixture of Ag-and Zn-containing NPs and the teethers had relatively high Ag and Zn contents(up to 501 and 254μg/g,respectively).Steam disinfection caused rubber decomposition into micro(nano)plastics(0.54-15.7μm)and NP release from the interior of bulk rubber and micro-sized plastics,thus enhancing the IVBA of Ag and Zn by up to 5.5 *** findings provide insights into mechanisms for NP release by steam *** oral exposure risk assessment suggested low health concerns on individual metal release,our study points out the need to assess the potential health risks of child co-exposure to metallic NPs and micro(nano)plastics.

关键词： Silicone rubber Metallic nanoparticles Micro(nano)plastics Bioaccessibility Children's health

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Accelerated aging: The hidden harm of microplastic exposure

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Science Bulletin 2024年第15期69卷 2357-2361页

作者： Haipeng Huang Jiaqi Hou baoshan xing Beidou Xi State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental SciencesBeijing 100012China Institute of Molecular Medicine College of Future TechnologyPeking UniversityBeijing 100871China Stockbridge School of Agriculture University of MassachusettsAmherstMA 01003USA

The widespread contamination of plastic materials has become a significant ecological concern, hindering progress toward sustainable development [1,2]. Plastic waste is widespread across various natural habitats, including terrestrial and marine ecosystems[3,4]. Microplastics (MPs) primarily originate from the fragmentation of larger plastic pieces. Due to their small size, MPs are easily ingested by organisms and subsequently transferred through food webs, posing risks to human health [5,6].

关键词： aging transferred hinder

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Effect of sub-acute exposure to TiO_2 nanoparticles on oxidative stress and histopathological changes in Juvenile Carp (Cyprinus carpio)

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Journal of Environmental Sciences 2009年第10期21卷 1459-1466页

作者： HAO Linhua WANG Zhenyu xing baoshan College of Environmentul Science and Engineering Ocean University of China Qingdao 266100 China. First Institute of Oceanography State Oceanic Administration Qingdao 266061 China. Department of Plant Soil and Insect Sciences University of Massachusetts Amherst MA 01003 USA.

Increasing application of nanotechnology highlights the need to clarify and understand nanotoxicity. Mammalian and in vitro studies have raised concerns about the toxicity of titanium dioxide nanoparticles （TiO2-NPs）, but there are limited data on ecotoxicity to aquatic organisms. In this work, the sub-acute toxicity of TiO2-NPs to carp （Cyprinus carpio） was assessed. Superoxide dismutase （SOD）, catalase （CAT） and peroxidase （POD） activities and lipid peroxidation （LPO） levels in liver, gill and brain tissues of carps varied with concentration of TiO2-NPs suspensions and exposure time （up to 8 d）. As a result, 100 and 200 mg/L TiO2-NPs caused statistically significant decrease in SOD, CAT and POD activities and significant increase in LPO levels in tissues （P 〈 0.05）, suggesting that the fish exposed to these two concentrations of TiO2-NPs suffered from the oxidative stress. The extent of depletion of antioxidant enzymes activities and the elevation of LPO in the liver was the greatest, indicating that the liver might be the most susceptible organ to TiO2-NPs exposure. In addition, carps had gill pathologies including edema and thickening of gill lamellae as well as gill filaments, and liver pathologies including necrotic and apoptosis hepatocytes after exposed to 100 and 200 mg/L TiO2-NPs for 20 d. These results indicated a potential risk from TiO2-NPs released into the aqueous environment.

关键词： TiO2 nanoparticles carp sub-acute toxicity oxidative stress histopathology

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渐变截面管道内甲烷/氢气/空气预混爆燃传播特性研究

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能源与环保 2024年第8期46卷 1-5页

作者：申宏栋邢宝山焦作千业新材料有限公司河南焦作454100 焦作煤业(集团)有限责任公司河南焦作454100

变截面管道是一种能够通过改变管道横截面积和形状来调节流体流动特性的管道形式,利用自主搭建的实验平台开展不同当量比及氢气体积分数的预混爆炸实验,对渐变截面管道中甲烷掺氢预混气体爆炸的压力波和火焰传播图像进行同步分析,并探... 详细信息

变截面管道是一种能够通过改变管道横截面积和形状来调节流体流动特性的管道形式,利用自主搭建的实验平台开展不同当量比及氢气体积分数的预混爆炸实验,对渐变截面管道中甲烷掺氢预混气体爆炸的压力波和火焰传播图像进行同步分析,并探究甲烷掺氢预混气体爆炸压力,以期为甲烷掺氢预混气体的运输做出预防和评估,并为防火防爆设计提供依据。研究结果表明,当混合气体处于0~300 mm管道部分时,不同当量比火焰变化趋势基本相同;当火焰锋面进入渐变截面管道部分,即300~600 mm时,火焰速度变化较大。其中,当量比为0.8时,火焰速度先升高后下降;当量比为1.0、1.2时,速度变化持续升高。

关键词：渐变截面管道氢气甲烷预混气体火焰传播速度爆炸

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Oxidation of Cr(Ⅲ) on birnessite surfaces: The effect of goethite and kaolinite

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Journal of Environmental Sciences 2015年第11期27卷 8-14页

作者： Laiyuan Zhong Jiewen Yang Liming Liu baoshan xing Department of Resources and Environmental Sciences College of Agriculture Guangdong Ocean University Stockbridge School of Agriculture University of Massachusetts Department of Land Resources Management College of Resources and Environmental Sciences China Agricultural University

Oxidation of Cr（Ⅲ） by manganese oxides may pose a potential threat to environments due to the formation of toxic Cr（Ⅵ） species. At present, it was still unclear whether the extent of Cr（Ⅲ） oxidation and fate of Cr（Ⅵ） would be changed when manganese oxides co-exist with other minerals, the case commonly occurring in soils. This study investigated the influence of goethite and kaolinite on Cr（Ⅲ） oxidation by birnessite under acidic p H condition（p H 3.5）and background electrolyte of 0.01 mol/L Na Cl. Goethite was found not to affect Cr（Ⅲ）oxidation, which was interpreted as the result of overwhelming adsorption of cationic Cr（Ⅲ） onto the negatively-charged birnessite（point of zero charge（PZC）〈 3.0） rather than the positively-charged goethite（PZC = 8.8）. However, more Cr（Ⅵ） would be retained by the surface with the increase in addition of goethite because of its strong ability on adsorption of Cr（Ⅵ） at low p H. Moreover, either Cr（Ⅲ） oxidation or distribution of the generated Cr（Ⅵ）between the solid and solution phases was not affected by kaolinite（PZC 〈 3.0）, indicating its low affinity for Cr species. Reactions occurring in the present mixed systems were suggested, which could be partly representative of those in the soils and further indicates that the mobility and risk of Cr（Ⅵ） would be decreased if goethite was present.

关键词： Cr(Ⅲ) oxidation Birnessite Goethite Kaolinite

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Mutual influence of copper and paraquat on their adsorption in soil

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Pedosphere 2023年第6期33卷 857-864页

作者： Huanhua WANG Zhiguo PEI Guangcai CHEN baoshan xing National Engineering Laboratory for Lake Pollution Control and Ecological Restoration Chinese Research Academy of Environmental SciencesBeijing 100012China State Environmental Protection Key Laboratory for Lake Pollution Control Chinese Research Academy of Environmental SciencesBeijing 100012China State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Research Institute of Subtropical Forestry Chinese Academy of ForestryHangzhou 311400China Stockbridge School of Agriculture University of MassachusettsAmherst MA 01003USA

Paraquat and copper (Cu) are commonly used and detected in ***,it is important to understand their mobility in the *** this study,the competitive effects of paraquat and Cu on their adsorption in five representative Chinese soils were investigated using batch adsorption equilibrium experiments and spectroscopic *** results showed that the adsorption of paraquat in soil varied with soil type and was positively correlated with both soil cation exchange capacity and organic matter *** exerted a more remarkable suppression effect on the adsorption of Cu than Cu on the adsorption of *** the presence of 0.12 and 0.19 mmol L-1paraquat,Cu adsorption decreased by 16%and 22%in Heilongjiang soil and by 24%and37%in Jiangxi soil,*** the presence of 0.1 and 0.2 mmol L-1Cu,paraquat adsorption decreased by 4%and 8%in Heilongjiang soil and by15%and 19%in Jiangxi soil,*** selectivity involving symmetric cation (paraquat2+and Cu2+) exchange is the probable basis for the suppression *** ultraviolet-visible absorption experiments suggested that the formation of Cu-paraquat complexes was unlikely to happen in a solution or at the soil *** K-edge X-ray absorption spectroscopy indicated that Cu in soil may have some water as hydration layers as the nearest neighbors,and each Cu atom was coordinated with five oxygen *** findings greatly improve our knowledge of the molecular-scale adsorption mechanisms of paraquat and Cu in soil and can be used to predict the behavior,transport,and fate of paraquat and Cu in agricultural soils.

关键词： cation exchange capacity competitive adsorption heavy metal herbicide organic contaminant soilorganic matter ultraviolet-visible absorption spectrophotometry X-ray absorption spectroscopy

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The frontier of microplastics and nanoplastics: Soil health and carbon neutrality

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Pedosphere 2023年第1期33卷 11-13页

作者： Zhuanxi LUO Aoze LI Haiming WANG baoshan xing College of Chemical Engineering Huaqiao UniversityXiamen 361021China Stockbridge School of Agriculture University of MassachusettsAmherst MA 01003USA

Microplastics and nanoplastics(MNPs)in soil have drawn increasing concerns about their potential threats to soil ecosystems due to their ubiquitous occurrence and *** interactions of MNPs with soil components,microbial community,plants,and fauna determine their impacts on soil biogeochemical processes and food ***,they are not largely *** research is also needed to develop reliable and standardized techniques and methods to characterize the relevant MNPs interacting with different types of soil ecosystems and to deeply examine their impacts on soil health,food security,and climate *** addition,mitigation protocols and regulation guidelines need to be *** findings will provide scientific and technological support for the understanding and management of soil health and carbon neutrality as influenced by MNPs.

关键词： soil neutral frontier

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Nano-black carbon(biochar)released from pyrogenic carbonaceous matter as a super suspending agent in water/soil environments

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Biochar 2021年第1期3卷 1-3页

作者： Fei Lian Zhenyu Wang baoshan xing Institute of Environmental Processes and Pollution Control and School of Environment and Civil EngineeringJiangnan UniversityWuxi 214122China Stockbridge School of Agriculture University of MassachusettsAmherstMA 01003USA

Nano-black carbon(BC)is one of the most active fractions in the pyrogenic carbonaceous matter *** majority of recent studies mainly focus on the role of nano-BC in the global carbon ***,based on literature and our recent studies,we suggest that nano-BC may also serve as a super suspending agent,carrier,and redox mediator for sorbates during its migration from terrestrial to water bodies due to its unique properties such as high colloidal stability,strong sorption capacity,and high surface *** full implications of nano-BC in water/soil environments are far more than we ***,we call for more detailed investigations on the activity and reactivity of nano-BC in water/soil environments.

关键词： Biochar ·Nanoparticle Suspension Sorption Redox capacity Biogeochemical processes

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Environmental behavior of engineered biochars and their aging processes in soil

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Biochar 2019年第4期1卷 339-351页

作者： Wenyan Duan Patryk Oleszczuk Bo Pan baoshan xing Faculty of Environmental Science and Engineering Kunming University of Science and TechnologyKunming 650500People’s Republic of China Yunnan Key Lab of Soil Carbon Sequestration and Pollution Control Kunming University of Science and TechnologyKunming 650500People’s Republic of China Department of Environmental Chemistry University of Maria Skłodowska-Curiepl.M.Curie-Sklodowskiej 320-031 LublinPoland Stockbridge School of Agriculture University of MassachusettsAmherstMA 01003USA

In recent years,due to the broad application of biochars,the preparation,environmental behavior and aging processes of biochars have attracted wide attention globally,especially the modification of ***,most of the studies only consider the improvement of biochar properties right after the modification,but neglect a complete evaluation of the long-term stability and eco-toxicity of these newly developed materials after entering the *** the development and utilization of biochars,engineered biochars(EngBCs)will soon enter the market,but its environmental risk still remains *** literature does not provide adequate information on how aging of EngBCs will affect their properties,and indirectly impact the properties of soils(cycle of elements and organic matter).Therefore,this review paper summarizes the aging process and environmental risk of biochars,aiming at better understanding the interactions between EngBCs and soil components or *** importantly,this review is to point out the contradictory speculations of environmental behavior of EngBCs studied at the present *** to the modification,the EngBCs stability may be significantly ***,the formation of functional group on EngBCs will enhance their interaction with soil minerals to form biochars-mineral complex,and thus EngBCs could be *** impacts of EngBCs after entering the environment are also ***,understanding EngBCs environmental behavior is critical,which is helpful to reduce the potential risk and to produce EngBCs following the rule of sustainable development and safety to the environment.

关键词： Biochar modification Stability Toxicity Soil components Organic contaminants

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Adsorptive removal of hydrophobic organic compounds by carbonaceous adsorbents:A comparative study of waste-polymer-based,coal-based activated carbon,and carbon nanotubes

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Journal of Environmental Sciences 2012年第9期24卷 1549-1558页

作者： Fei Lian Chun Chang Yang Du Lingyan Zhu baoshan xing Chang Liu Centre for Research in Ecotoxicology and Environmental Remediation Institute of Agro-environmental Protection Ministry of Agriculture Tianjin 300191 China College of Environmental Science and Engineering Tianjin Key Laboratory of Environmental Remediation and Pollution Control Key Laboratory of Pollution Processes and Environmental Criteria Ministry of Education Nankai University Tianjin 300071 China Department of Plant Soil and Insect Sciences University of Massachusetts Amherst Massachusetts 01003 USA

Adsorption of the hydrophobic organic compounds （HOCs） trichloroethylene （TCE）, 1,3-dichlorobenzene （DCB）, 1,3-dirdtrobenzene （DNB） and y-hexachlorocyclohexane （HCH） on five different carbonaceous materials was compared. The adsorbents included three polymer-based activated carbons, one coal-based activated carbon （F400） and multiwalled carbon nanotubes （MWNT）. The polymer- based activated carbons were prepared using KOH activation from waste polymers： polyvinyl chloride （PVC）, polyethyleneterephthalate （PET） and tire rubber （TR）. Compared with F400 and MWNT, activated carbons derived from PVC and PET exhibited fast adsorption kinetics and high adsorption capacity toward the HOCs, attributed to their extremely large hydrophobic surface area （2700 m2/g） and highly mesoporous structures. Adsorption of small-sized TCE was stronger on the tire-rubber-based carbon and F400 resulting from the pore-filling effect. In contrast, due to the molecular sieving effect, their adsorption on HCH was lower. MWNT exhibited the lowest adsorption capacity toward HOCs because of its low surface area and characteristic of aggregating in aqueous solution.

关键词： polymer waste activated carbon hydrophobic organic compound adsorption mechanism

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