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1. Distribution of eight perfluoroalkyl acids in plant-soil-water systems and their effect on the soil microbial community

Author:
Zhang, Dongqing,   et al.   ; Zhang, Weilan; Liang, Yanna;     Show all 3 Authors
Source:
The Science of the total environment 2019
ISSN:
0048-9697
Subject:
Juncus effusus; aqueous solutions; bioaccumulation factor; carbon; greenhouses; perfluorooctane sulfonic acid; phytoremediation; roots; shoots; soil; soil bacteria; sorption
Abstract:
... Phytoremediation of per- and polyfluoroalkyl substances (PFAS) appears to be a green remediation technique. To understand distribution of PFAS in plant-soil-water systems, eight perfluoroalkyl acids (PFAAs) at three different concentrations were spiked to Juncus effusus grown in a greenhouse for 21 days. Results from this study demonstrated that mass-based plant uptake of PFAAs correlated positive ...
DOI:
10.1016/j.scitotenv.2019.134146

2. Nanotechnology in remediation of water contaminated by poly- and perfluoroalkyl substances: A review

Author:
Zhang, Dongqing,   et al.   ; Zhang, Weilan; Liang, Yanna;     Show all 3 Authors
Source:
Environmental pollution 2019 v.247 pp. 266-276
ISSN:
0269-7491
Subject:
adsorption; carbon nanotubes; electrochemistry; iron oxides; magnetic properties; oxidation; perfluorocarbons; perfluorooctanoic acid; photocatalysts; photochemical reactions; remediation; sorbents; surface area; ultraviolet radiation; water pollution
Abstract:
... This article gives an overview of nanotechnologies applied in remediation of water contaminated by poly- and perfluoroalkyl substances (PFASs). The use of engineered nanomaterials (ENMs) in physical sorption and photochemical reactions offers a promising solution in PFAS removal because of the high surface area and the associated high reactivities of the ENMs. Modification of carbon nanotubes (CNT ...
DOI:
10.1016/j.envpol.2019.01.045

3. Exposure of Juncus effusus to seven perfluoroalkyl acids: Uptake, accumulation and phytotoxicity

Author:
Zhang, Dongqing,   et al.   ; Zhang, Weilan; Zagorevski, Dmitri V.; Liang, Yanna;     Show all 4 Authors
Source:
Chemosphere 2019 v.233 pp. 300-308
ISSN:
0045-6535
Subject:
Juncus effusus; antioxidant activity; carbon; catalase; perfluorohexane sulfonic acid; perfluorooctane sulfonic acid; perfluorooctanoic acid; phytotoxicity; roots; shoots; superoxide dismutase; water pollution; wetland plants; United States
Abstract:
... The extensive use of poly- and perfluoroalkyl substances (PFAS) has led to perfluoroalkyl acids (PFAAs) contamination in various environmental matrices. To remove PFAAs from contaminated water, this study investigated plant uptake of PFAAs by a native wetland plant species in the US, Juncus effusus. The results showed that J. effusus translocated selected PFAAs, including perfluoropentanoic acid ( ...
DOI:
10.1016/j.chemosphere.2019.05.258

4. Assessing performance of porous pavements and bioretention cells for stormwater management in response to probable climatic changes

Author:
Zhang, Dongqing,   et al.   ; Wang, Mo; Cheng, Yuning; Tan, Soon Keat;     Show all 4 Authors
Source:
Journal of environmental management 2019 v.243 pp. 157-167
ISSN:
0301-4797
Subject:
bioretention areas; case studies; climate; climate change; cost effectiveness; pavements; rain; runoff; storms; watersheds
Abstract:
... The effectiveness of porous pavement (PP) and bio-retention cells (BCs) under the influence of potential climate change was investigated based on representative concentration pathways (RCPs). A case study of a test catchment in Guangzhou illustrated changes of peak runoff under various climate scenarios. There were distinct increases in runoff volume and peak discharge in response to RCP8.5 but on ...
DOI:
10.1016/j.jenvman.2019.05.012

5. Characterizations of dissolved organic matter and bacterial community structures in rice washing drainage (RWD)-based synthetic groundwater denitrification

Author:
Zhang, Dongqing,   et al.   ; He, Qiaochong; Feng, Chuanping; Chen, Nan; Hou, Tingting; Dai, Jingwen; Hao, Chunbo; Mao, Bingchun;     Show all 8 Authors
Source:
Chemosphere 2019 v.215 pp. 142-152
ISSN:
0045-6535
Subject:
Bacteroidetes; Chloroflexi; Enterobacter; Ideonella; Methylophilaceae; Stenotrophomonas; Thiobacillus; bacterial communities; community structure; denitrification; denitrifying bacteria; dissolved organic matter; drainage; fluorescence; groundwater; nitrate nitrogen; nitrates; rice; sequence analysis; sludge; temporal variation; tryptophan; washing
Abstract:
... In this study, characteristics of dissolved organic matter (DOM) and bacterial community structure in rice washing drainage (RWD)-based groundwater denitrification systems inoculated with and without seeding sludge were investigated. Complete nitrate removal was achieved with a maximum denitrification rate of 64.1 mg NO3−-N·(gVSS·h)−1. Analysis of three-dimension fluorescence excitation-emission m ...
DOI:
10.1016/j.chemosphere.2018.10.026

6. Assessing Hydrological Effects of Bioretention Cells for Urban Stormwater Runoff in Response to Climatic Changes

Author:
Zhang, Dongqing,   et al.   ; Wang, Mo; Lou, Siwei; Hou, Qinghe; Liu, Yijie; Cheng, Yuning; Qi, Jinda; Tan, Soon Keat;     Show all 8 Authors
Source:
Water 2019 v.11 no.5
ISSN:
2073-4441
Subject:
bioretention areas; case studies; climate change; hydrologic models; infrastructure; planning; storms; stormwater
Abstract:
... An investigation into the effectiveness of bioretention cells (BCs) under potential climatic changes was conducted using representative concentration pathways. A case study of Guangzhou showed changes in peak runoff in climate change scenarios, with obvious growth in RCP8.5 and slight growth in RCP2.6. The performance of BCs on multiple parameters, including reduction of runoff volume, peak runoff ...
DOI:
10.3390/w11050997

7. Prediction of soybean price in China using QR-RBF neural network model

Author:
Zhang, Dongqing,   et al.   ; Zang, Guangming; Li, Jing; Ma, Kaiping; Liu, Huan;     Show all 5 Authors
Source:
Computers and electronics in agriculture 2018 v.154 pp. 10-17
ISSN:
0168-1699
Subject:
Consumer Price Index; algorithms; food security; imports; market development; neural networks; prediction; prices; regression analysis; soybeans; China
Abstract:
... As the price of soybean affects the soybean market development and food security in China, its forecasting is essential. A quantile regression-radial basis function (QR-RBF) neural network model is introduced in this paper. The model has two characteristics: (1) using quantile regression models to describe the distribution of the soybean price range; and (2) using RBF neural networks to approximat ...
DOI:
10.1016/j.compag.2018.08.016

8. Optimisation of the harvesting time of rice in moist and non-moist dispersed fields

Author:
Zhang, Dongqing,   et al.   ; He, Pengfei; Li, Jing; Wan, Shan;     Show all 4 Authors
Source:
Biosystems engineering 2018 v.170 pp. 12-23
ISSN:
1537-5110
Subject:
agricultural land; combine harvesters; harvesting; models; operating costs; rice; soil water; villages; water content; wheat; China
Abstract:
... Optimisation of the harvesting time of rice is significant for wheat growth and reducing the operational cost of harvesting rice in wheat-rice rotation regions. In China, rice grows in discontinuous and dispersed fields, and it is harvested with combine-harvesters provided by an agricultural machinery cooperative. The dispersed fields are divided into two types, moist and non-moist. The moist fiel ...
DOI:
10.1016/j.biosystemseng.2018.03.008

9. Application of constructed wetlands for treating agricultural runoff and agro-industrial wastewater: a review

Author:
Zhang, Dongqing,   et al.   ; Wang, Mo; Dong, Jianwen; Tan, Soon Keat;     Show all 4 Authors
Source:
Hydrobiologia 2018 v.805 no.1 pp. 1-31
ISSN:
0018-8158
Subject:
aeration; agricultural runoff; constructed wetlands; cost effectiveness; energy; municipal wastewater
Abstract:
... With the unique advantages of cost-effectiveness and low energy consumption, constructed wetlands (CWs) are commonly used for treatment of secondary municipal wastewaters. Over the last decades, CWs have gained increased popularity for treating agricultural runoff and agro-industrial wastewater. This review highlights the practice, application, and research on wetland technology, placing them in t ...
DOI:
10.1007/s10750-017-3315-z

10. Biological denitrification in marine aquaculture systems: A multiple electron donor microcosm study

Author:
Zhang, Dongqing,   et al.   ; He, Qiaochong; Main, Kevan; Feng, Chuanping; Ergas, Sarina J.;     Show all 5 Authors
Source:
Bioresource technology 2018 v.263 pp. 340-349
ISSN:
0960-8524
Subject:
Eucalyptus; alkalinity; biodegradability; denitrification; fish waste; ion exchange; mariculture; methanol; mulches; organic carbon; recirculating aquaculture systems; seawater; sulfates; sulfur; wastewater; wood; wood chips
Abstract:
... There is a lack of information on denitrification of saline wastewaters, such as those from marine recirculating aquaculture systems (RAS), ion exchange brines and wastewater in areas where sea water is used for toilet flushing. In this study, side-by-side microcosms were used to compare methanol, fish waste (FW), wood chips, elemental sulfur (S0) and a combination of wood chips and sulfur for sal ...
DOI:
10.1016/j.biortech.2018.05.018

11. Fate and behavior of dissolved organic matter in a submerged anoxic-aerobic membrane bioreactor (MBR)

Author:
Zhang, Dongqing,   et al.   ; Trzcinski, Antoine Prandota; Luo, Jinxue; Stuckey, David C.; Tan, Soon Keat;     Show all 5 Authors
Source:
Environmental science and pollution research international 2018 v.25 no.5 pp. 4289-4302
ISSN:
0944-1344
Subject:
alkanes; aromatic compounds; biodegradability; biological treatment; carbohydrates; dissolved organic matter; esters; fluorescence; gas chromatography-mass spectrometry; membrane bioreactors; microfiltration; molecular weight; proteins
Abstract:
... In this study, the production, composition, and characteristics of dissolved organic matter (DOM) in an anoxic-aerobic submerged membrane bioreactor (MBR) were investigated. The average concentrations of proteins and carbohydrates in the MBR aerobic stage were 3.96 ± 0.28 and 8.36 ± 0.89 mg/L, respectively. After membrane filtration, these values decreased to 2.9 ± 0.2 and 2.8 ± 0.2 mg/L, respecti ...
DOI:
10.1007/s11356-017-0586-x

12. Green Supplier Evaluation and Selection in Apparel Manufacturing Using a Fuzzy Multi-Criteria Decision-Making Approach

Author:
Zhang, Dongqing,   et al.   ; Guo, Zhaoxia; Liu, Haitao; Yang, Jing;     Show all 4 Authors
Source:
Sustainability 2017 v.9 no.4
ISSN:
2071-1050
Subject:
clothing; environmental performance; multi-criteria decision making; policy analysis; sustainable manufacturing
Abstract:
... With the increasing environmental awareness, apparel manufacturers have begun to consider environmental issues in supplier evaluation and selection. It is crucial to assess suppliers based on their environmental performance along with other criteria for supplier selection. This paper addresses the green supplier evaluation and selection problem in global apparel manufacturing by developing a metho ...
DOI:
10.3390/su9040650

13. Effect of a Submerged Zone and Carbon Source on Nutrient and Metal Removal for Stormwater by Bioretention Cells

Author:
Zhang, Dongqing,   et al.   ; Wang, Mo; Li, Yong; Hou, Qinghe; Yu, Yuying; Qi, Jinda; Fu, Weicong; Dong, Jianwen; Cheng, Yuning;     Show all 9 Authors
Source:
Water 2018 v.10 no.11
ISSN:
2073-4441
Subject:
adsorption; biofilters; bioretention areas; carbon; copper; filtration; heavy metals; lead; nitrogen; phosphorus; stormwater; total phosphorus; zinc
Abstract:
... A bioretention system is a low-impact and sustainable treatment facility for treating urban stormwater runoff. To meet or maintain a consistently satisfactory performance, especially in terms of increasing nitrogen removal efficiency, the introduction of a submerged (anoxic) zone (SZ) combined with a module-based carbon source (C) has been recommended. This study investigated the removal of nitrog ...
DOI:
10.3390/w10111629

14. A comparative study on the influential factors of China's provincial energy intensity

Author:
Zhang, Dongqing,   et al.   ; Yang, Guangfei; Li, Wenli; Wang, Jianliang;     Show all 4 Authors
Source:
Energy Policy 2016 v.88 pp. 74-85
ISSN:
0301-4215
Subject:
energy; energy costs; energy use and consumption; nonlinear models; sustainable development; China
Abstract:
... China has become the largest energy consumer worldwide, and it is important to study the energy intensity to realize the sustainable development goal of China. This paper focuses on investigating the influential factors of China's energy intensity using provincial-level panel data from 1985 to 2012. More specifically, we try to identify which factor is relatively more important to pay attention to ...
DOI:
10.1016/j.enpol.2015.10.011

15. Depressed expression of FAE1 and FAD2 genes modifies fatty acid profiles and storage compounds accumulation in Brassica napus seeds

Author:
Zhang, Dongqing,   et al.   ; Shi, Jianghua; Lang, Chunxiu; Wang, Fulin; Wu, Xuelong; Liu, Renhu; Zheng, Tao; Chen, Jinqing; Wu, Guanting;     Show all 9 Authors
Source:
Plant science 2017 v.263 pp. 177-182
ISSN:
0168-9452
Subject:
Brassica napus; RNA; biosynthesis; enzymes; erucic acid; fatty acid composition; fatty acid metabolism; gene expression; genes; genetic improvement; growth and development; nutritive value; oleic acid; protein content; rapeseed; seed storage; seeds; transgenic plants
Abstract:
... In plants, the enzymes fatty acid dehydrogenase 2 (FAD2) and fatty acid elongase 1 (FAE1) have been shown in previous studies to play important roles in the de novo biosynthesis of fatty acids. However, the effects of depressed expression of FAD2 and FAE1 on seed storage compounds accumulation remains to be elucidated.In this study, we produced RNA interfering transgenic rapeseeds lines, BnFAD2-Ri ...
DOI:
10.1016/j.plantsci.2017.07.014

16. Comparison of the effects and distribution of zinc oxide nanoparticles and zinc ions in activated sludge reactors Part A Toxic/hazardous substances & environmental engineering

Author:
Zhang, Dongqing,   et al.   ; Trzcinski, Antoine P.; Oh, Hyun-Suk; Chew, Evelyn; Liu, Yu; Tan, Soon Keat; Ng, Wun Jern;     Show all 7 Authors
Source:
Journal of environmental science and health 2017 v.52 no.11 pp. 1073-1081
ISSN:
1532-4117
Subject:
activated sludge; adsorption; ammonia; ammonium; chemical oxygen demand; industry; microorganisms; nanoparticles; toxicity; zinc; zinc oxide; zinc sulfate
Abstract:
... Zinc Oxide nanoparticles (ZnO NPs) are being increasingly applied in the industry, which results inevitably in the release of these materials into the hydrosphere. In this study, simulated waste-activated sludge experiments were conducted to investigate the effects of Zinc Oxide NPs and to compare it with its ionic counterpart (as ZnSO ₄). It was found that even 1 mg/L of ZnO NPs could have a smal ...
DOI:
10.1080/10934529.2017.1338896

17. Comparison and distribution of copper oxide nanoparticles and copper ions in activated sludge reactors Part A Toxic/hazardous substances & environmental engineering

Author:
Zhang, Dongqing,   et al.   ; Trzcinski, Antoine P.; Oh, Hyun-Suk; Chew, Evelyn; Tan, Soon Keat; Ng, Wun Jern; Liu, Yu;     Show all 7 Authors
Source:
Journal of environmental science and health 2017 v.52 no.6 pp. 507-514
ISSN:
1532-4117
Subject:
activated sludge; adsorption; ammonia; biosorption; cell viability; chemical oxygen demand; cupric oxide; image analysis; industry; microorganisms; nanoparticles; scanning electron microscopy; toxicity; wastewater
Abstract:
... Copper oxide nanoparticles (CuO NPs) are being increasingly applied in the industry which results inevitably in the release of these materials into the hydrosphere. In this study, simulated waste-activated sludge experiments were conducted to investigate the effects of Copper Oxide NPs at concentrations of 0.1, 1, 10 and 50 mg/L and to compare it with its ionic counterpart (CuSO ₄). It was found t ...
DOI:
10.1080/10934529.2017.1281689

18. Crop rotation model for contract farming with constraints on similar profits

Author:
Zhang, Dongqing,   et al.   ; Li, Jing; Rodriguez, Daniel; Ma, Kaiping;     Show all 4 Authors
Source:
Computers and electronics in agriculture 2015 v.119 pp. 12-18
ISSN:
0168-1699
Subject:
algorithms; crop rotation; farm area; farm tenancy; farmers; models; organic foods; prices; profits and margins; vegetable crops; China
Abstract:
... In China, investors have contracts with smallholder farmers to plant organic vegetable crops. The objective of the smallholder farmers is to maximize profits per unit of farm area, and minimize the differences in profits between farmers. Farmers’ profits are a function of the crop rotation scheduling and the achieved prices. Here we propose an operational model that considers a crop rotation sched ...
DOI:
10.1016/j.compag.2015.10.002

19. Assessing cost-effectiveness of bioretention on stormwater in response to climate change and urbanization for future scenarios

Author:
Zhang, Dongqing,   et al.   ; Wang, Mo; Adhityan, Appan; Ng, Wun Jern; Dong, Jianwen; Tan, Soon Keat;     Show all 6 Authors
Source:
Journal of hydrology 2016 v.543 pp. 423-432
ISSN:
0022-1694
Subject:
climate change; cost effectiveness; hydrologic models; life cycle assessment; life cycle costing; socioeconomics; storms; stormwater; urbanization; watersheds; Singapore
Abstract:
... Bioretention,as a popular low impact development practice,has become more important to mitigate adverse impacts on urban stormwater. However, there is very limited information regarding ensuring the effectiveness of bioretention response to uncertain future challenges, especially when takinginto considerationclimate change and urbanization. The main objective of this paper isto identify the cost-e ...
DOI:
10.1016/j.jhydrol.2016.10.019

20. Comparison on the carbohydrate metabolic enzyme activities and their gene expression patterns in canola differing seed oil content

Author:
Zhang, Dongqing,   et al.   ; Li, Zhilan; Hua, Shuijin; Yu, Huasheng; Zhang, Yaofeng; Lin, Baogang; Jiang, Lixi;     Show all 7 Authors
Source:
Plant growth regulation 2016 v.78 no.3 pp. 357-369
ISSN:
0167-6903
Subject:
beta-fructofuranosidase; canola; enzyme activity; flowering; fruits; gene expression; gene expression regulation; genes; glucose-1-phosphate adenylyltransferase; homeostasis; lipid content; lipids; phosphorylase; starch; sucrose; sucrose synthase; sucrose-phosphate synthase
Abstract:
... Carbohydrates are an important regulator of canola seed oil content. However, understanding the physiological regulation by carbohydrates governing seed oil accumulation is fragmented. In the present study, activities of sucrose and starch catalytic enzymes, including neutral and alkaline invertase, sucrose synthase (SUS), and starch phosphorylase, and biosynthetic enzymes, including sucrose phosp ...
DOI:
10.1007/s10725-015-0098-y