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Determination of arsenic content in wastewaterfed fish pond in Hoang mai district, Hanoi, Vietnam - Le Thai HaThe total As concentration in the water samples ranged from 23.22 to 45.86 µg/L. The highest levels were found in the inlet water and the lowest were in the outlet water. About 14% of As entered the fish pond in the SPM form. The lower As contents in the outlet sampling point may result from some natural removal processes such as sedimentation a...
8 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 736 | Lượt tải: 0
The cultivation of spirulina platensis on vertical aeroponic substrates - Nguyen Thi LienAs with all plants, micro-algae photosynthesize, they assimilate inorganic carbon for conversion into organic matter. Although light is an essential substrate for photosynthesis, high light intensity causes a decrease of photosynthetic activity. The growth rate of algae is maximal at saturation intensity and decreases with both increase or decre...
7 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 858 | Lượt tải: 0
Researching ganoderma residues applying in earthworm cultivation process (perionyx excavatus) - Nguyen Thi Ngoc NhiIn the process of raising the Perionyx excavatus based on waste Ganoderma residue, the rate of 75% GR treated Trichoderma and 25 % cow manure was shown to be most suitable. Perionyx excavatus growed well and produce manure when feeding with mixture of GR treated with Trichoderma and cow manure. The application of this process could bring benefit...
8 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 812 | Lượt tải: 0
Studies on distribution and fractionation of heavy metals in sediment of cau River, Vietnam - Van Dieu AnhConcentrations of metals in sampling points distributed along Cau River indicated an elevated level with a wide range of variation. At some sampling points the concentration of Cu, Pb exceeded the permitted standards of national technical regulation for water quality and sediment, leading to the risk of heavy metal pollution at local level. Resu...
7 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 782 | Lượt tải: 0
Study on co-Fermentation of cow dung and giant dirt in semi-continuous anaerobic digester - Nguyen Le PhuongThis pilot scale experiment was performed to develop co-digestion process of cow dung and giant dirt in case of one-stage and two-stage processes. The reactors were fed with mixtures of CD and GD of 100 %CD, 50 %CD + 50 %GD, and 100 %GD (0.8 g VS/L*day for 17 L of substrate) and temperatures were maintained at room temperature. During operation ...
6 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 1029 | Lượt tải: 0
Application of pre-Ozonation for removal of disinfection by- products pre-cursor from Saigon river water - Bui Thi Thanh LoanBy using a lab-scale ozone contactor, the optimum condition for operation was obtained at ozone dose of 1.5 mgO3/mgDOC, pH 8.5, and contact time of 15 minutes. Under this condition, the removal efficiencies of THMFP, DOC, iron (II), total iron, and manganese were 41 %, 29 %, 23 %, 2 %, and 76 %, respectively. The results also confirmed that ozon...
6 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 857 | Lượt tải: 0
Partition of polycyclic aromatic hydrocarbons in water-Sediment system containing humic acid - Van Dieu AnhPartition of Phenanthrene (Phe), Pyrene (Pyr), and Benzo[a]pyrene (BaP) in the sediment water system with the presence of humic acid (HA) was investigated and the effect of HA on the partition was investigated. The presence of dissolved humic acid shifted the equilibrium partition to the water phase, and decreased the apparent sediment water par...
8 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 821 | Lượt tải: 0
Sewer discharge characteristics and water balance in dry season in Hue, Vietnam - Tran Nguyen Quynh AnhCombined sewer discharge characteristics in an urban residential area in Hue city on dry days in dry season (DdDs) were presented and compared with those on dry days in rainy season (DdRs). Discharge flow rate on DdDs fluctuated among hours in a day and corresponded to the water consumption trend. Average discharge flow rate on DdDs was 2.33±0.2...
8 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 888 | Lượt tải: 0
Simultaneous removal of some heavy metals and arsenic from aqueous solutions by phragmites australis - Tran Thi Huyen NgaA suitable plant for phytoremediation would have a high capacity to accumulate heavy metals and metalloids and a high biomass and rapid growth [8]. In addition, plants able to concentrate metals within the whole plant at concentrations 100 times higher than that in the growing solution (Bioconcentration factor - BCF) should be considered good ac...
6 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 973 | Lượt tải: 0
Application of principle component analysis to build provincial eco-Efficiency index for Binh Duong province from 2001-2012 - Doan Ngoc Nhu TamTo increase eco-efficiency, the process of the social economic development of Binh Duong province to simultaneously satisfy three objectives: Increase the value of social and economic development (increase SDI), Reduce exploitation and consumption of resources (reducing RCI), and Reduce environmental pressures (reducing EPrI). Binh Duong provin...
8 trang | Chia sẻ: honghp95 | Ngày: 02/12/2020 | Lượt xem: 869 | Lượt tải: 0
