ORCID Profile
0000-0002-7343-9933
Current Organisation
Thai Nguyen University
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Publisher: Nepal Journals Online (JOL)
Date: 31-12-2021
Abstract: In 2015, the Vietnam’s Renewable Energy Development Strategy up to 2020 with an outlook to 2050 was approved. Renewable energy sources were developing to ensure energy security and addressing the growing power demand of the country. Increasing renewable energy sources such as biomass, solar, wind and small hydro is the way to shift Vietnam to a sustainable energy future. The general picture on Vietnamese renewable energy practice and experience are presented in this paper. Also it offers suggestion the technical and political keys to minimize the barriers in renewable energy sector. It is the general review of available sources on Green technology for sustainable development: Practice and experience of renewable energy in Vietnam. In conclusion the study gives brief status of energy barriers, biomass, renewable energy, small-hydro power, solar power, and wind power of Vietnam
Publisher: Elsevier BV
Date: 07-2022
DOI: 10.1016/J.CHEMOSPHERE.2022.134488
Abstract: Composting is very robust and efficient for the biodegradation of organic waste however secondary pollutants, namely greenhouse gases (GHGs) and odorous emissions, are environmental concerns during this process. Biochar addition to compost has attracted the interest of scientists with a lot of publication in recent years because it has addressed this matter and enhanced the quality of compost mixture. This review aims to evaluate the role of biochar during organic waste composting and identify the gaps of knowledge in this field. Moreover, the research direction to fill knowledge gaps was proposed and highlighted. Results demonstrated the commonly referenced conditions during composting mixed biochar should be reached such as pH (6.5-7.5), moisture (50-60%), initial C/N ratio (20-25:1), biochar doses (1-20% w/w), improved oxygen content availability, enhanced the performance and humification, accelerating organic matter decomposition through faster microbial growth. Biochar significantly decreased GHGs and odorous emissions by adding a 5-10% dosage range due to its larger surface area and porosity. On the other hand, with high exchange capacity and interaction with organic matters, biochar enhanced the composting performance humification (e.g., formation humic and fulvic acid). Biochar could extend the thermophilic phase of composting, reduce the pH value, NH
Publisher: Research Square Platform LLC
Date: 23-07-2021
DOI: 10.21203/RS.3.RS-521306/V1
Abstract: This paper summarises a study of the application of the synthetic chelate ethylenediaminetetraacetic acid (EDTA), and the natural chelates ethylenediamine-N,N-disuccinic acid (EDDS) and nitrilotriacetate (NTA) to enhance ryegrass uptake of the heavy metal(oid)s (HMs) (As, Cd, Cu, Pb and Zn) from contaminated soils in mining sites. The study compares the effects of these chelates (EDTA, EDDS and NTA) on the phytoavailability of HMs (As, Cd, Cu, Pb, Zn) using ryegrass ( Lolium multiflorum ) through the single addition and sequential addition methods. The results show that application of EDTA, EDDS and NTA significantly increases ryegrass’s ( Lolium multiflorum ) shoot uptake of some HMs when compared with no EDTA, EDDS or NTA application, particularly through sequential chelate treatment (EDTA 0.5:1 + 0.5:1 NTA 0.5:1 + 0.5:1 EDDS 0.5:1 + 0.5:1). EDTA 0.5:1 + 0.5:1 was more effective at increasing the concentration of Pb in shoots than were the other chelates (EDDS and NTA) and controls. Moreover, the concentrations of Zn in the shoots of ryegrass in LH significantly increased with the application of split dose (0.5:1 + 0.5:1). The plants displayed symptoms of toxicity including yellow and necrotic leaves at the end of the experiment. The selected chelates (EDTA, EDDS and NTA) led to a significant decrease in plant biomass (yield) 28 days after transfer with a maximum decrease in EDTA treatment (0.5:1 + 0.5:1) soils. This decrease was 3.43-fold in HT, 3-fold in LH and 1.59-fold, respectively, relative to the control. HM concentration and dissolved organic carbon (DOC) in pore water, provided an explanation for why fresh weight was significantly reduced with application of chelates in sequential dose (EDTA 0.5:1 + 0.5:1 and NTA 0.5:1 + 0.5:1).
Publisher: Springer Science and Business Media LLC
Date: 02-04-2022
No related grants have been discovered for Ngoc Son Hai Nguyen.