Phongphayboun Phonepaseuth

National University of Laos · Faculty of Environmental Sciences

Land application of treated palm oil mill effluent (TPOME) could be used as an alternative tertiary wastewater treatment process. However, phenolic compounds in TPOME might be leached to the environment. This study investigated the ability of grasses on reducing phenolic compounds in the leachate after TPOME application. Several pasture grasses in...

A newly discovered species from central Laos, Ceropegia longicaudata, is here described and illustrated. It is compared with the morphologically similar species Ceropegia cochleata Kidyoo. Ceropegia longicaudata displays clear differences in the leaf pubescence and venation, length of the corolla lobe tips, colour of corolla lobe, and shape of stam...

A new species of Paraboea (Gesneriaceae), P. khotamiae, from a limestone karst in central Laos, is described and illustrated. The species resembles Paraboea bintangensis, P. prazeri and P. robusta, but differs in leaf shape and floral features, especially corolla shape and size, the interior of the corolla tube, and capsule characters. In addition,...

Two new species of Sonerila Roxb. (Melastomataceae), S. erectifolia Phonep., Soulad. & Tagane sp. nov. from southern Laos, and S. souvannii Phonep. & Soulad. sp. nov. from central Laos, are described and illustrated. Comparisons with morphologically similar species are presented, along with ecological information and preliminary conservation status...

Begonia murina Craib from central and B. poilanei Kiew from southern of Laos, are newly recorded in Laos. Based on Lao materials, detailed description, photographs, and notes on habitat, ecology, & taxonomic discussion of these two species compared with the Chinese, Thai, & Vietnamese types are provided.

Two new records of Dendrobium, D. daklakense, and D. metrium, are reported for the flora of Laos for the first time. Photographs, information on habitat and ecology, vernacular names and additional notes for each species are given based on collections from Dak Cheung Plateau, Sekong Province (D. daklakense), and Phou Khao Khouay National Park, Vien...

This study provides an updated list of Begonia occurring in Laos, and a new species is added to the checklist. The new taxon, Begonia xenos C.W.Lin, Phonep. & Rahm is similar to B. sinofloribunda Dorr in habit and leaf shape, but the new species differs in its staminate flowers having 4 tepals (vs. 2) with slightly crenulate (vs. entire) margins, p...

Dendrobium fuscifaucium is described here as a new species from Laos PDR. This species was found at a local nursery and was claimed to have been collected from the limestone mountains of Kasi District (Vientiane Province). Detailed description and comparison, comparison with its allied species, D. hekouense, D. luoi and D. wangliangii is provided,...

Landfilling is is a common practical method used for waste management in developing countries. The leakage of landfill leachate containing a high amount of Chemical Oxygen Demand (COD) is a main environmental problem during the rainy season. Previous research work has utilized the coagulation-flocculation process to treat this leachate. Although ma...

Study of the spatial distribution and characteristics of littering spots in Houy-Markhiew Watershed, Vientiane Capital, The aims of this study are 1). to study the spatial distribution and characteristics of people's littering, 2). To study the amount and type of waste found. GPS Survey and visual interpretation were investigated for spatial distri...

This research aims to compare footpath blocks production with adding plastic foam (PS) as a component. Four ratios with different plastic amounts were added (sand, cement, plastic, gravel, and water) (kg) Vis. T1 = 1.50:0.80:0.05:2.85:0.50; T2 = 1.50:0.80:0.05:1.90:0.50; T3 = 1.50:0.80:0.10:0.95:0.50; T4 = 1.50:0.80:0.10:0.00:0.80. Each ratio was a...

Water hyacinth is one of the most rapidly growing floating weeds that obstruct water transportation and inhibit the photosynthesis of aquatic plants. These were the main problems around the world, especially in tropical areas. Utilizing water hyacinth as bioenergy is one way to reduce those problems. This study aims to utilize water hyacinth as bio...

Six new species of Gesneriaceae from Laos, namely Didymocarpus angustiflorus Souvann. & Lanors., D. bolavenensis Souvann., Soulad. & Phonep., D. laoticus Souvann. & Lanors., D. trilobus Souvann. & Phonep., Hemiboea olivifolia Souvann. & Tagane and Paraboea planiflora Souvann. & Lanors., are described and illustrated. Additionally, Aeschynanthus bra...

Bamboo is an impotent natural resource for Laos; they are used for producing furniture, handicrafts, household items, and chopsticks, etc. Besides that, bamboo sticks are usually single-use in buffet restaurants nowadays, which generate waste afterward. From our survey indicate that 1,514g - 1,643g of bamboo sticks were generated per buffet restaur...

Twelve pteridophytes from six families are reported from the Bolaven Plateau, southern Laos, as new records to the flora of Laos. For each species, voucher specimens, photographs and additional information including geographical distribution, ecology and taxonomic notes are provided.

COLE TCH, PHONEPASEUTH P, SOULADETH P (2021) ແຜນພາບສາຍສຳພັນທາງວິວັດທະນາການຂອງຕະກຸນດອກຈຳປາ Lao version of: COLE TCH (2021) APOCYNACEAE PHYLOGENY POSTER

Water hyacinths is rapidly growing and wide-spreading weed in water which obstructs water transport, drainage, and causes waterlogging. Therefore, utilization of water hyacinth as materials for handicrafts is the one way to solve this problem. The objectives of this study were to studied techniques used for separating water hyacinth fiber, and to c...

Giant mimosa (Mimosa pigra L.) is one of the dangerous introduced species which the most rapid growth around streams and riverbanks. These plants inhibit and completion grows of other plants in the same area. Utilize mimosa as bioenergy is a practical way to reduce this problem. This continues to study from previous utilization of agricultural wast...

Photo of Beautiful flowers during a botanical survey in Bolaven Plateau(1), September 2020

Didymocarpus albiflorus, a new species from central Lao PDR, is described and illustrated with photographs. The new species is similar to D. middletonii and D. brevipedunculatus, but can be distinguished by a combination of characters (see diagnosis and note). A detailed description, illustration, photographs, distribution, ecology and provisional...

This research aims to compare the efficiency of the charcoal briquette made from agricultural residues. Four kinds of agricultural residues namely sugarcane bagasse, corn cob, coconut shell, and giant mimosa (Mimosa pigra L.), 10 kilograms of raw materials of each, were dry with the sun until the weight was constant. After that, carbonization and c...

Gasified stove was technology for reducing emission. This study aims to create complete combustion stove, examined the efficiency of PV stove compare to SNV and firewood stoves, Thermoelectric generator (TEG) SP1848 SA were examined their ability to generate electric under both sides in difference temperature and also evaluate economic and environm...

This research aims to examine the physical, chemical properties, and quality of pyrolysis oil extraction from three plastic type; PET, HDPE, and PS. In our experiment, two hundred fifty grams of each plastic type was used in thermal degradation as pyrolysis. From our results, the starting temperature for pyrolysis oil was from 380 to 500 degree cen...

Palm oil mill effluent (POME) in stabilization ponds usually contains phenolic compounds and color higher than standard. The wastewater may exceed the pond capacity during raining season. Soil irrigation might be used to reduce the wastewater volume; however the accumulation of phenolic compounds could be toxic to plants. Previously, we examined rh...