Microwave irradiation had been one of the methods for removing color of four commercial reactive dyes: Sunzol Black B 150%, Procion Red MX 5B, Remazol Brilliant Blue R and Sunzol turquoise blue G 133 in aqueous solution. The effect of irradiation time, power consumption, air flow and initial dye concentrations were investigated. The results showed that color of all fours reactive dyes were eliminated. The Jar-test compared experiment was also...

 7 p tdmu 20/07/2018 201 1 Download

Fe–Mn binary oxide incorporated into diatomite was prepared by the redox reaction of KMnO4 and FeSO4.7H2O in range of pH of 3-9. The obtained catalyst was characterized by SEM, EDX and XPS. The results showed that manganse oxide and iron oxide exist multiple oxidation states including Mn2O3, MnO2, FeO and Fe2O3. The Mn-Fe-diatomite exhibited catalytically synergized properties of iron and manganese oxide. The phenol oxidation by H2O2 using...

 6 p tdmu 20/07/2018 304 1 Download

The results presented in this paper are the ab initio intermolecular potentials and the second virial coefficient, B2 (T) of the dimer N2-N2. These ab initio potentials were proposed by the quantum chemical calculations at high level of theory CCSD(T) with basis sets of Dunning’s valence correlation-consistent aug-cc-pVmZ (m = 2, 3); these results were extrapolated to complete basis set limit aug-cc-pV23Z. The ab initio energies of complete...

 6 p tdmu 20/07/2018 221 1 Download

Trong những năm gần đây, nhiều nghiên cứu đã cho biết nồng độ các chất ô nhiễm trong nước thải chăn nuôi heo sau biogas vượt quá cao so với tiêu chuẩn yêu cầu (QCVN 40:2011/BTNMT). Tuy nhiên các nghiên cứu này chỉ khảosát trên phạm vi nhỏ (trên 1 hộ chăn nuôi) nên chưa phản ánh tổng quan hiện trạng chất lượng nước thải nên khó có thể...

 8 p tdmu 29/05/2017 320 3 Download

Báo cáo này nghiên cứu khả năng ứng dụng thuật toán Hybrid vào thiết kếTMD cho nhà cao tầng chống tác nhân động đất.Dựa vào đặc điểm phổ năng lượng động đất thường có dạng dải hẹp, bài báo đã đề xuất cách tính toán để lựa chọn các thông số cơ học ban đầu TMD hợp lý gần với nghiệm tối ưu của bài toán. Các...

 5 p tdmu 29/05/2017 431 2 Download

Higher education in Vietnam is still young, primarily originated after 1954 in Northern Vietnam and after 1975 in Southern Vietnam. Before Vietnam officially announced the “renovation” (policy of renewal), the educational quality guaranty in higher education was implemented by meticulously selecting the intake and closely supervising the graduates by testing, graduation recognition, granting degrees....

 6 p tdmu 29/05/2017 396 3 Download

Theory instructs science researches for it is generally experience and knowledge that has been accumulated from generation to generation. Furthermore, theory also provides researchers basic knowledge to argue and interpret matters of research. However, in most of universities, little attention has been paid to theory to be introduced, studied and applied. Structure of a discipline often comprises of terms, objects, function of...

 8 p tdmu 29/05/2017 358 2 Download

For nearly the past three decades, sustainable livelihoods havebeen worldwide seen as the most prioritytarget in developing strategies. In Vietnam, despite a series of developing programs and projects launched by the local authorities, poverty and degrading environment has still beenrecurring problems.Poverty has been threatening the lives of people, especially of those living inrural and mountainous areas....

 7 p tdmu 29/05/2017 344 3 Download

Currently, climate change shows an increasingly high intensity and anthropogenic greenhouse gas emissions are shown as the main drive force of rapid climate change. in 2015, Hoi An City emitted 8,855 tons of CO2-eq from municipal solid waste disposal sites, which treated 25,000 tons of solid waste from domestic and tourist activities. The flow of solid waste in disposal sites was analyzed and the sources of greenhouse gas emissions were...

 8 p tdmu 25/05/2017 403 2 Download

This research was carried out to assess effectiveness of enforcement procedures for groundwater management policies in O Mon district of Can Tho city. The specific research objective were: (i) assessment of groundwater level declining from 2000 to 2013; (ii) assessment effectiveness of groundwater policy and (iii) to propose solutions to improved effective groundwater management in the research area. Methods were used: (i) collection and...

 8 p tdmu 25/05/2017 458 2 Download

Biogas digester for treatment of pig manure was rapidly gaining interest in both farmers and scientists in the Mekong delta. The largest advantage of anaerobic digestion is energy recovery. Biogas collected from biogas digester is used as a substitute for fossil fuels toproduce heat; whereas digestioncan be used as a fertilizer or soil conditioner. Due to animal husbandry and biogas digester development,...

 4 p tdmu 25/05/2017 317 2 Download

A continuous-flow sequencing batch reactor known as the intermittent cycle extended aeration system –sequencing batch reactor (ICEAS –SBR) was used to investigate the treatability of the tannery wastewater. A model made from poly acrylic with a capacity of 20 liters was utilized to evaluate COD and nitrogen removal while the loading rate increased up to 2.0 kg COD/m3.day. The polyvinyl...

 6 p tdmu 25/05/2017 353 2 Download