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| 1 | Influence of particle size and salinity on adsorption of basic dyes by agricultural waste: dried Seagrape (Caulerpa lentillifera)显示文摘Green macroalga Caulerpa lentillifera was found to have reasonable adsorption capacity for basic dyes, Astrazon Blue FGRL (AB), Astrazon Red GTLN (AR), and Astrazon Golden Yellow GL-E (AY). The initial dye concentration was in the range of 100–1,800 mg/L. The dried algal sorbent was ground and sieved into 3 sizes: S (0.1–0.84 mm), M (0.84–2.0 mm), and L sizes (larger than 2.0 mm). For all conditions examined in this work (at 25°C in batch systems), the adsorption reached equilibrium within the first hour. The kinetic data corresponded well with the pseudo second order kinetic model where the rate constant, k2, decreased as the sorbent size increased for all dyes. The adsorption isotherms followed both Langmuir and Freundlich models. Among three sorbent sizes, S size gave the highest adsorption capacity followed by M and L sizes. A reduction of sorbent size increased the specific surface area for mass transfer, and also increased the total pore volume, thus providing more active sites for adsorption. The adsorption of AB was adversely influenced by the protonation of algal surface at low pH. On the other hand, the adsorption of AR and AY could be due to weak electrostatic interaction, which was not significantly affected by pH. Increasing salinity of the system caused a decrease in adsorption capacity possibly due to the competition between Na+ and the dye cations for the binding sites on algal surface. Moreover, an increase in salinity generated a compressed electrical double layer on the algal surface which exerted repulsive force, retarding the adsorption of positive charged molecules such as the basic dyes. | Pimol Punjongharn Khanidtha Meevasana Prasert Pavasant | 2008 | Journal of Environmental Sciences2008，20，6： | 15 |
| 2 | Batch studies of adsorption of copper and lead on activated carbon from Eucalyptus camaldulensis Dehn. bark显示文摘Powdered activated carbon (PAC) prepared from Eucalyptus camaldulensis Dehn. bark was tested for its adsorption capacity for Cu(Ⅱ) and Pb(Ⅱ). The experiment was conducted to investigate the effects of pH, contact time, initial metal concentration, and temperature. The best adsorption of both Cu(Ⅱ) and Pb(Ⅱ) occurred at pH 5, where the adsorption reached equilibrium within 45 min for the whole range of initial heavy metal concentrations (0.1-10 mmol/L). The adsorption kinetics was found to follow the pseudo-second order model where equilibrium adsorption capacities and adsorption rate constants increased with initial heavy metal concentrations. The adsorption isotherm followed Langmuir better than Freundlich models within the temperature range (25-60°C). The maximum adsorption capacities (qm) occurred at 60°C, where qm for Cu(Ⅱ) and Pb(Ⅱ) were 0.85 and 0.89 mmol/g, respectively. The enthalpies of Cu(Ⅱ) and Pb(Ⅱ) adsorption were 43.26 and 58.77 kJ/mol, respectively. The positive enthalpy of adsorption indicated an endothermic nature of the adsorption. | Phussadee Patnukao Apipreeya Kongsuwan Prasert Pavasant | 2008 | Journal of Environmental Sciences2008，20，9： | 6 |
| 3 | Ultrasound-Assisted Extraction of Anthraquinones from Roots of Morinda Citrifolia显示文摘 | SURASAK HEMWIMOL PRASERT PAVASANT ARTIWAN SHOTIPRUK | 2005 | Ultrasonics Sonochemistry2005，，： | 1 |
| 4 | Used LubricatingOil Management Options Based on Life Cycle Thinking显示文摘 | Vorapot Kanokkantapong Worapon Kiatkittipong Bunyarit Panyapinyopol Pomtip Wongsuchoto Prasert Pavasant | 2009 | Resources Conservation and Recycling2009，53，5： | 1 |
| 5 | Microwave pretreatment of defatted rice bran for enhanced recovery of total phenolic compounds extracted by subcritical water显示文摘 | Piyaporn Wataniyakul Prasert Pavasant Motonobu Goto Artiwan Shotipruk | 2012 | Bioresource Technology2012，，： | 1 |
| 6 | FTIR evaluation of functional groups involved in the formation of haloacetic acids during the chlorination of raw water显示文摘 | Vorapot Kanokkantapong Taha F. Marhaba Bunyarit Panyapinyophol Prasert Pavasant | 2005 | Journal of Hazardous Materials2005，，2： | 1 |
| 7 | Characterization of precursors to trihalomethanes formation in Bangkok source water显示文摘 | Bunyarit Panyapinyopol Taha F. Marhaba Vorapot Kanokkantapong Prasert Pavasant | 2005 | Journal of Hazardous Materials2005，，1： | 1 |
| 8 | Characterization ofhaloacetic acid precursors in source water 显示文摘 | Vorapot Kanokkantapong Taha F Marhaba Prasert Pavasant | 2006 | Journal of Environmental Management2006，，80： | 1 |
| 9 | Characterization ofhaloacetic acid precursors in source water 显示文摘 | Vorapot Kanokkantapong Taha F Marhaba Prasert Pavasant | 2006 | Journal of Environmental Management2006，，80： | 1 |
| 10 | Extraction of anthraquinones from roots of Morinda citrifolia by pressurized hot water: Antioxidant activity of extracts显示文摘 | Boonchai Pongnaravane Motonobu Goto Mitsuru Sasaki Thitiporn Anekpankul Prasert Pavasant Artiwan Shotipruk | 2006 | The Journal of Supercritical Fluids2006，，3： | 1 |
| 11 | High performance biosorbent (Caulerpa lentillifera) for basic dye removal显示文摘 | Khanidtha Marungrueng Prasert Pavasant | 2006 | Bioresource Technology2006，06，： | 1 |
| 12 | Removal of basic dye (Astrazon Blue FGRL) using macroalga Caulerpa lentillifera显示文摘 | Khanidtha Marungrueng Prasert Pavasant | 2006 | Environmental Management2006，78，： | 1 |
| 13 | Sorption of Cu^2 + , Cd^2+ ,and Pb^2+ using modified zeolite from coal fly ash 显示文摘 | Ronbanchob Apiratikul Prasert Pavasant | 2008 | Chemical Engineering Journal2008，144，2： | 1 |
| 14 | Activated Carbon Prepared from Eucalyptus Camaldulensis Dehn Bark Using Phosphoric Acid Activation显示文摘 | Patnukao Phussadee Pavasant Prasert | 2008 | Bioresource Technology2008，99，： | 1 |
| 15 | Sorption of Cu 2+ , Cd 2+ , and Pb 2+ using modified zeolite from coal fly ash显示文摘 | Ronbanchob Apiratikul Prasert Pavasant | 2008 | Chemical Engineering Journal2008，，2： | 1 |
| 16 | Response surface methodology to supercritical carbon dioxide extraction of astaxanthin from Haematococcus pluvialis显示文摘 | Praiya Thana Siti Machmudah Motonobu Goto Mitsuru Sasaki Prasert Pavasant Artiwan Shotipruk | 2007 | Bioresource Technology2007，，8： | 1 |
| 17 | Microwave - assisted extraction of antioxidative anthraquinones from roots of Morinda citrifolia 显示文摘 | Surasak Hemwimon Prasert Pavasant ArtiwanShotipruk | 2007 | Separation and Purification Technology2007，54，1： | 1 |
| 18 | Extraction of anti-cancer damnacanthal from roots of Morinda citrifolia by subcritical water显示文摘 | Thitiporn Anekpankul Motonobu Goto Mitsuru Sasaki Prasert Pavasant Artiwan Shotipruk | 2007 | Separation and Purification Technology2007，，3： | 1 |
| 19 | Batch and column studies of biosorption of heavy metals by caulerpa lentillifera显示文摘 | Ronbanchob Apiratikul Prasert Pavasant | 2008 | Bioresour Technol2008，91，8： | 1 |
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