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A CFD study of the transport and fate of airborne droplets in a ventilated office: The role of droplet

《环境科学与工程前沿(英文)》 2022年 第16卷 第3期 doi: 10.1007/s11783-021-1465-8

摘要:

• Coulomb and Lennard−Jones forces were considered for droplet interactions.

关键词: Droplet interactions     Aerosols     Colloids     CFD     Transport     Fate    

Microplastic and Nanoplastic Pollution: Characterization, Transport, Fate, and Remediation Strategies

《环境科学与工程前沿(英文)》 2022年 第16卷 第1期   页码 12-12 doi: 10.1007/s11783-021-1446-y

摘要: Plastics continues to have a critical and essential role in human society such as food packing, product packages and building materials. In the meantime, it has been recognized as a global sustainability priority to study and mitigate pollution of plastics and the associated unknown impacts from ultrafine plastic particles. Microplastic (<5 mm) particles, for instance, have been detected in the aquatic environment globally and have raised scientific interests and environmental concerns. Microplastics (MPs) can enter rivers through a variety of pathways (e.g., wastewater effluent, breakdown of plastic debris) and can negatively impact aquatic organisms through both direct injection with food and indirect contamination from absorbed toxins. MPs can absorb heavy metals, pathogens, and organic contaminants, mainly persistent organic pollutants (POPs) that can be ingested by organisms and introduced into the food web. Meanwhile, MPs may also release potentially toxic substances (e.g., plasticizers, flame retardants and antimicrobial agents) during weathering and degradation. An increasing number of papers are being published during the last years related to the effects of MPs as well as with synergistic effects when associated with MPs and their byproducts such as nanometer sized plastics or nanoplastics. This special issue successfully garnered a collection of research articles that addressed various topics of microplastic or nanoplastic pollution, characteristic, and environmental fate in the water environment. Particularly, this issue reported the seasonable occurrence and distribution of microplastics in different regions (e.g., China and India) from high-latitude nature reserve to sediments and coastal marine environments. Moreover, new sampling and analytical methodologies (e.g., fluorescent labeling) to identify MPs in diver matrixes (e.g., wastewater, sediment, and biota) are critically reviewed. The information is critical for scientists, business leaders, legislators, and the public are to explore and develop solutions that lessen society’s plastic footprint. We thank all authors, reviewers, and editorial staff of FESE for their efforts and contributions to this special issue. Guest Editors: Wen Zhang Department of Civil and Environmental Engineering, New Jersey Institute of Technology (wen.zhang@njit.edu) Melissa Pasquinelli College of Natural Resources, North Carolina State University (melissa_pasquinelli@ncsu.edu) Yang Li School of the Environment Beijing Normal University (liyang_bnu@bnu.edu.cn)

Numerical simulation of benzene transport in shoreline groundwater affected by tides under different

《环境科学与工程前沿(英文)》 2022年 第16卷 第5期 doi: 10.1007/s11783-022-1540-9

摘要:

● An approach for assessing the transport of benzene on the beach was proposed.

关键词: Numerical simulation     Benzene     Transport and fate     Shoreline     Groundwater     Tide    

Remediation of soil and groundwater contaminated with organic chemicals using stabilized nanoparticles: Lessons from the past two decades

Zhengqing Cai, Xiao Zhao, Jun Duan, Dongye Zhao, Zhi Dang, Zhang Lin

《环境科学与工程前沿(英文)》 2020年 第14卷 第5期 doi: 10.1007/s11783-020-1263-8

摘要: Abstract ▪ Overviewed evolution and environmental applications of stabilized nanoparticles. ▪ Reviewed theories on particle stabilization for enhanced reactivity/deliverability. ▪ Examined various in situ remediation technologies based on stabilized nanoparticles. ▪ Summarized knowledge on transport of stabilized nanoparticles in porous media. ▪ Identified key knowledge gaps and future research needs on stabilized nanoparticles. Due to improved soil deliverability and high reactivity, stabilized nanoparticles have been studied for nearly two decades for in situ remediation of soil and groundwater contaminated with organic pollutants. While large amounts of bench- and field-scale experimental data have demonstrated the potential of the innovative technology, extensive research results have also unveiled various merits and constraints associated different soil characteristics, types of nanoparticles and particle stabilization techniques. Overall, this work aims to critically overview the fundamental principles on particle stabilization, and the evolution and some recent developments of stabilized nanoparticles for degradation of organic contaminants in soil and groundwater. The specific objectives are to: 1) overview fundamental mechanisms in nanoparticle stabilization; 2) summarize key applications of stabilized nanoparticles for in situ remediation of soil and groundwater contaminated by legacy and emerging organic chemicals; 3) update the latest knowledge on the transport and fate of stabilized nanoparticles; 4) examine the merits and constraints of stabilized nanoparticles in environmental remediation applications; and 5) identify the knowledge gaps and future research needs pertaining to stabilized nanoparticles for remediation of contaminated soil and groundwater. Per instructions of this invited special issue, this review is focused on contributions from our group (one of the pioneers in the subject field), which, however, is supplemented by important relevant works by others. The knowledge gained is expected to further advance the science and technology in the environmental applications of stabilized nanoparticles.

关键词: Stabilized nanoparticle     In-situ remediation     Organic contaminant     Soil remediation     Groundwater     Fate and transport    

Migration and fate of polycyclic aromatic hydrocarbons in bioretention systems with different media:

《环境科学与工程前沿(英文)》 2023年 第18卷 第4期 doi: 10.1007/s11783-024-1802-9

摘要:

● Bioretention systems showed > 92% load reduction rates of PAHs.

关键词: Bioretention     Polycyclic aromatic hydrocarbons     HYDRUS-1D     Model simulation     Migration    

Dynamic fate modeling of γ-hexachlorocyclohexane in the lower reaches of the Liao River

LIU Zhenyu, YANG Fenglin, QUAN Xie, ZHANG Xiaohong

《环境科学与工程前沿(英文)》 2007年 第1卷 第2期   页码 166-171 doi: 10.1007/s11783-007-0029-x

摘要: A QWASI model dependent on temperature is parameterized to describe the long-term fate of persistent organic pollutants (POPs) in the Liao River. The model parameters, namely fugacity capacity, degradation rate, and transfer coefficient, are profoundly affected by temperature. This model is used to simulate the fate of γ-hexachlorocyclohexane (γ-HCH) in the lower reaches of the Liao River from 1998 to 2008. Modeling results show that γ-HCH fugacity capacities in air, water, and sediment increase as temperature decreases, and the transfer and transformation rate coefficients increase as temperature increases. The variations of transfer and transformation parameter values depend on fugacity capacities, and transfer and transformation coefficients simultaneously. The performance of the model is evaluated by comparing the predicted and observed concentrations in the water and sediment of the Liao River. The predicted values agree well with the observed value in the order of magnitude, in most cases within the factor of 3. It is believed that the model is appropriate for simulating the long term fate of POPs in the Liao River.

关键词: coefficient     POPs     temperature     sediment increase     dependent    

Occurrence and fate of antibiotics in advanced wastewater treatment facilities and receiving rivers in

Xinwei LI,Hanchang SHI,Kuixiao LI,Liang ZHANG,Yiping GAN

《环境科学与工程前沿(英文)》 2014年 第8卷 第6期   页码 888-894 doi: 10.1007/s11783-014-0735-0

摘要: The occurrence and removal of 13 antibiotics were investigated in five wastewater treatment plants (WWTPs) with advanced wastewater treatment processes in Beijing, China. Most of the target antibiotics were detected in the secondary and tertiary effluents, with the concentrations of 4.8–1106.0 and 0.3–505.0 ng·L . Fluoroquinolone antibiotics showed relatively high concentrations in all samples (782–1814 ng·L ). Different tertiary treatment processes showed discrepant antibiotics removal performances. Ozonation process was found more effective in removing target antibiotics compared to the coagulation-flocculation-sedimentation process and sand filtration process. Investigation of the target antibiotics in three typical urban rivers in Beijing was carried out to understand antibiotics occurrence in surface water environment. Eight antibiotics were detected in the studied rivers, with highest concentration of antibiotics in the river which was mainly replenished by reclaimed water. This study showed the necessity of employing more effective advanced treatment facilities to further reduce the discharge amount of antibiotics.

关键词: antibiotics     advanced treatment     urban river     reclaimed water    

The source and transport of bioaerosols in the air: A review

《环境科学与工程前沿(英文)》 2021年 第15卷 第3期 doi: 10.1007/s11783-020-1336-8

摘要:

• Emission of microbe from local environments is a main source of bioaerosols.

关键词: Bioaerosols     Diffusion     Source identification     Biogeography    

Identification of resistant pharmaceuticals in ozonation using QSAR modeling and their fate in electro-peroxone

《环境科学与工程前沿(英文)》 2021年 第15卷 第5期 doi: 10.1007/s11783-021-1394-6

摘要:

• Effect of converting ozonation to E-peroxone was studied on pharmaceutical removal.

关键词: Ozone     Electro-peroxone     Wastewater     Quantitative structure activity relationship     Advanced oxidation processes    

Intercontinental transport of air pollution

Lin ZHANG,

《环境科学与工程前沿(英文)》 2010年 第4卷 第1期   页码 20-29 doi: 10.1007/s11783-010-0014-7

摘要: There is an increasing interest on the intercontinental transport of air pollution among the three main emission regions at northern mid-latitudes: North America, Europe, and East Asia. Air pollutants with sufficient long lifetime can be transported from one continent to another. Observations from ground sites, aircraft and satellites have demonstrated this intercontinental-scale transport of air pollutants in the free troposphere. Numerical models have been applied to understand the pathways of the transport and the impact of intercontinental pollution transport. This paper reviews current observational evidence and modeling studies of intercontinental transport of ozone and its precursors, and the resulting impacts on air quality.

关键词: intercontinental transport     ozone     air pollution    

Occurrence and fate of typical antibiotics in wastewater treatment plants in Harbin, North-east China

Weihua Wang, Wanfeng Zhang, Hong Liang, Dawen Gao

《环境科学与工程前沿(英文)》 2019年 第13卷 第3期 doi: 10.1007/s11783-019-1118-3

摘要:

• The concentration distributions and removals of 12 antibiotics were investigated.

• Macrolides and fluoroquinolones presented relatively higher concentrations.

• The removal of antibiotics did not differ among the different treatment processes.

关键词: Antibiotics     WWTPs     Occurrence     Removal efficiency    

Future urban transport management

《工程管理前沿(英文)》   页码 534-539 doi: 10.1007/s42524-023-0255-3

摘要: The incorporation of disruptive innovations into the transportation industry will inevitably cause major upheavals in the transportation sector. However, existing research lacks systematic theories and methodologies to represent the underlying characteristics of future urban transport systems. Furthermore, emerging modes in urban mobility have not been sufficiently studied. The National Natural Science Foundation of China (NSFC) officially approved the Basic Science Center project titled “Future Urban Transport Management” in 2022. The project members include leading scientists and engineers from Beijing Jiaotong University, Beihang University, and Beijing Transport Institute. Based on a wide range of previous projects by the consortium on urban mobility and sustainable cities, this project will encompass transdisciplinary and interdisciplinary research to explore critical issues affecting future urban traffic management. It aims to develop fundamental theories and methods based on social and technological developments in the near future and explores innovative solutions to implement alongside these emerging developments in urban mobility.

关键词: future urban transport management     travel behavior characteristics     transportation operations     transportation emergency management     transportation decision intelligence    

Thermal transport properties of monolayer phosphorene: a mini-review of theoretical studies

Guangzhao QIN, Ming HU

《能源前沿(英文)》 2018年 第12卷 第1期   页码 87-96 doi: 10.1007/s11708-018-0513-y

摘要: Phosphorene, a two-dimensional (2D) elemental semiconductor with a high carrier mobility and intrinsic direct band gap, possesses fascinating chemical and physical properties distinctively different from other 2D materials. Its rapidly growing applications in nano-/opto-electronics and thermoelectrics call for fundamental understanding of the thermal transport properties. Considering the fact that there have been so many studies on the thermal transport in phosphorene, it is on emerging demand to have a review on the progress of previous studies and give an outlook on future work. In this mini-review, the unique thermal transport properties of phosphorene induced by the hinge-like structure are examined. There exists a huge deviation in the reported thermal conductivity of phosphorene in literature. Besides, the mechanism underlying the deviation is discussed by reviewing the effect of different functionals and cutoff distance in calculating the thermal transport properties of phosphorene. It is found that the (vdW) interactions play a key role in the formation of resonant bonding, which leads to long-ranged interactions. Taking into account of the vdW interactions and including the long-ranged interactions caused by the resonant bonding with large cutoff distance are important for getting the accurate and converged thermal conductivity of phosphorene. Moreover, a fundamental insight into the thermal transport is provided based on the review of resonant bonding in phosphorene. This mini-review summarizes the progress of the thermal transport in phosphorene and gives an outlook on future horizons, which would benefit the design of phosphorene based nano-electronics.

关键词: thermal transport     phosphorene     resonant bonding    

EFFECTS OF TRANSPORT STRESS ON THE INTESTINES INVOLVING NEURONAL NITRIC OXIDE SYNTHASE

《农业科学与工程前沿(英文)》   页码 285-295 doi: 10.15302/J-FASE-2022469

摘要:

● Transport stress declined the level of leukocytes including lymphocytes in rat serum.

关键词: intestine     nNOS     nNOS-positive neurons     transport stress    

NITROGEN USE AND MANAGEMENT IN ORCHARDS AND VEGETABLE FIELDS IN CHINA: CHALLENGES AND SOLUTIONS

《农业科学与工程前沿(英文)》 2022年 第9卷 第3期   页码 386-395 doi: 10.15302/J-FASE-2022443

摘要:

● Excessive application of N fertilizers in orchards and vegetable fields (OVFs) in China is particularly common.

关键词: nitrogen fate     nitrogen fertilizer     orchards     vegetable fields    

标题 作者 时间 类型 操作

A CFD study of the transport and fate of airborne droplets in a ventilated office: The role of droplet

期刊论文

Microplastic and Nanoplastic Pollution: Characterization, Transport, Fate, and Remediation Strategies

期刊论文

Numerical simulation of benzene transport in shoreline groundwater affected by tides under different

期刊论文

Remediation of soil and groundwater contaminated with organic chemicals using stabilized nanoparticles: Lessons from the past two decades

Zhengqing Cai, Xiao Zhao, Jun Duan, Dongye Zhao, Zhi Dang, Zhang Lin

期刊论文

Migration and fate of polycyclic aromatic hydrocarbons in bioretention systems with different media:

期刊论文

Dynamic fate modeling of γ-hexachlorocyclohexane in the lower reaches of the Liao River

LIU Zhenyu, YANG Fenglin, QUAN Xie, ZHANG Xiaohong

期刊论文

Occurrence and fate of antibiotics in advanced wastewater treatment facilities and receiving rivers in

Xinwei LI,Hanchang SHI,Kuixiao LI,Liang ZHANG,Yiping GAN

期刊论文

The source and transport of bioaerosols in the air: A review

期刊论文

Identification of resistant pharmaceuticals in ozonation using QSAR modeling and their fate in electro-peroxone

期刊论文

Intercontinental transport of air pollution

Lin ZHANG,

期刊论文

Occurrence and fate of typical antibiotics in wastewater treatment plants in Harbin, North-east China

Weihua Wang, Wanfeng Zhang, Hong Liang, Dawen Gao

期刊论文

Future urban transport management

期刊论文

Thermal transport properties of monolayer phosphorene: a mini-review of theoretical studies

Guangzhao QIN, Ming HU

期刊论文

EFFECTS OF TRANSPORT STRESS ON THE INTESTINES INVOLVING NEURONAL NITRIC OXIDE SYNTHASE

期刊论文

NITROGEN USE AND MANAGEMENT IN ORCHARDS AND VEGETABLE FIELDS IN CHINA: CHALLENGES AND SOLUTIONS

期刊论文