Date: November 20, 2018 Room A Room B Room C Room D Time - - PowerPoint PPT Presentation

Date: November 20, 2018 Room A Time Worrkshop 3 Chairman 13.00-17.00

• Dr. P. Kajitvichyanukul, Thailand

IWADP-016 The effects of diffuse pollution on the aquatic ecosystems

• f the Kruger national park, South Africa, E.Riddell ,

D.Govender, R.Petersen, H. Sithole, P.Shikwambana, South Africa IWADP-101 Photodegradation of endoxifen in treated wastewater and receivingsSurface water by natural sunlight, E.Khan , M.A.Martin , J.Sivaguru , J.M.Evoy , T.DeSutter , P. Sonthipand , Thailand IWADP-138 Remediation of phenol contaminated water by catalytic oxidation/peroxidation , S.M.Smith , Thailand IWADP-040 Water for all: analysis of a proposed novel approach to wetland conservation and flood risk reduction in the Lunan water, Scotland, using a tilting weir, A. Vinten ,L.Kuhfuss, O.Shortall, A. Ibiyemi, I.Pohle, S.Addy, M.Gabriel, I.Gunn, P.McPhail ,J.Corriga, UK IWADP-019 Reduction of silver nanoparticle toxicity affecting ammonia oxidation using cell entrapment technique, N.h.Giao , S.S.Ratpukdi, P.Kunapongkiti, P.Thuptimdang, T.Limpiyakorn, Thailand IWADP-077 Heterogeneous photocatalytic degradation of phorate using graphene oxide-TiO2 nanocomposite,R.Kuma, S. Mukherji, India IWADP-023 Impacts of non-point pollutants through pollution load duration curve in Jeonju river, South Korea, H.CHOI , J. S. Hong, F. K. F. Geronimo, M. S. Jeon and L. H. Kim, Korea IWADP-037 Kinetics and mechanisms of sulfamethoxazole degradation by MPUV/PMS process, X.Ao , W.Liu, W.Sun, China IWADP-110 Sulfate-sulfide removal and biogas production from Latex-concentration processing wastewater, W.Thongnueakhaeng , U.Onthong, Thailand IWADP-031 Designing back from practice: experiences from the Olifants river (South Africa) of the development and use of a near real-time management system for catchments under stress ,H.Retief , S.R. Pollard; E. Riddell, South Africa IWADP-043 Catalytic wet oxidation of organic dyes under ambient conditions, J.Trakulmututa , S.M. Smith, Thailand IWADP-125 Kinetic and isotherm studies of paraquat adsorption in aqueous solution by ceramic from water treatment sludge,N.Promjan , M.Jindakaraked,P.Kajitvichyanukul, Thailand IWADP-055 Assessment of optimal sampling frequency representing the diffuse pollutants in Icheon River, South Korea, F.K.Geronimo , M. M. Redillas, J. S. Hong, H. S. Choi, L.

• H. Kim, Korea

IWADP-044 Paraquat dichloride removal by photocatalytic process using modified melamine scraps, A. Kaeokan , P. Upama, R. Rammaroeng, and A. Watcharenwong, Thailand IWADP-149 Race beyond separations with innovative fused- core technology and monolithic proficiency, P. Thomya, Thailand IWADP-046 Total nitrogen loading parameters of Lamtakhong watershed, Thailand, C.N.Tran , C.Yossapol, Thailand IWADP-045 Antimony trisulfide modified titanium dioxide nanotubes for water disinfection of Fecal Streptococcus by the photocatalytic process,N. Saijaioup , W. Dankittikul, and A. Watcharenwong, Thailand IWADP-113 Enhancing wastewater treatment performance

• f biofilters,R.Sing h, K.Samal, P.Bhunia, R.R.

Dash, India 15.00-15.15 13.00-15.00 Room B Room C

• Assoc. Prof. S.M. Smith, Thailand and EEAT Expert, Thailand

Water Treatment and Technology Room D Workshop: Non-point Source Modeling: Pesticides Accumulation and Leaching Risk, Prof. Anluaf Ruediger, Osnabrueck University of Applied Science, Germany River Basin Management

• Dr. E. Riddell, South Africa and EEAT Expert, Thailand

Water Innovation and Frontier Technology

• Prof. E. Khan, USA and EEAT Expert, Thailand

Break

Date: November 20, 2018 Room A Time Worrkshop 3 IWADP-022 Developing new insight into land and water management pressures across catchments using novel approaches to stakeholder engagement, K.Stosch ,R. S. Quilliam, N. Bunnefeld and D. M. Oliver, UK IWADP-050 VUV-based AOPs for trihalomethanes formation reduction, P.Kiattisaksiri , E.Khan, P.Punyapalakul, T.Ratpukdi, Thailand IWADP-131 Bacteria immobilized on biochar for removing paraquat in soil, N.C.Toan , N.H.Ha, Q.A. Binh, P.Kajitvichyanuku, Thailand IWADP-094 Event mean concentration approach to assess diffuse pollution with auto-sampling , C.Kozak ,C.V.S. Fernandes, S.M.Braga, J.C.R de Azevedo, L.L.do Prado, S.Hilgert, Brazil IWADP-056 Electro-oxidation of landfill leachate using boron-doped diamond: role of current density and ions, F. Agustina ,

• A. Y. Bagastyo, E. Nurhayati, Indonesia

IWADP-147 Dichlorvos degradation by bacteria immobilized- biochar, S.Sitha, N.Promjan,Q.A.Binh, D. Tungrakarnpoung, P.Kajitvichyanukul, Cambodia IWADP-122 Water-to-cloud: using cyber physical systems to determine water quality , P. Hirani , S. Balivada, India IWADP-061 Degradation and transformation of natural organic matter accountable for disinfection by products formation by UV photolysis and UV/Chlor(am)ine, S.Phattarapattamawong ,C. Hirun-Utok, Thailand IWADP-093 w1 The effect of temperature on the performance

• f ceramic membrane photo catalytic,K.Watsa ,

P.Phudis, T.Kathayut, Thailand IWADP-041 Sustainable wastewater management technology for tourism in Thailand: case and experimental studies,W.Liamlaem , L.Benjawan , M.Yammanas ,h. Polprasert , Thailand IWADP-062 Biodegradability enhancement of highly recalcitrant

• rganic wastewater using electrochemical advanced
• xidation process, Ervin Nurhayati ,P.P.I Sari, A. Y.

Bagastyo, Indonesia Workshop: Non-point Source Modeling: Pesticides Accumulation and Leaching Risk, Prof. Anluaf Ruediger, Osnabrueck University of Applied Science, Germany 15.20-17.00 Room B Room C Room D River Basin Management Water Innovation and Frontier Technology Water Treatment and Technology

Date: November 21, 2018 Time Chairman 9.00-12.00

IWADP-127 Performance evaluation of nano-ceramic and carbon water filters for drinking water process ,Y. Mingmongkol , N.Nawinwattana, P.Kajitvichyanukul, Thailand

IWADP-140 Water Monitoring: Fit for purpose, Ray Earle , Ireland IWADP-118 Screening and isolation of the potential white rot fungi from rotten tree bark in Thailand for sulfamethoxazole degradation ,P.Piyaviriyakul, S.Kitpati Boontanoon,N. Boontanon, Thailand IWADP-069 Satellite remote sensing of the movements of algal blooms and in middle eastern gulf area, M.Park , H.Chen, USA IWADP-087 Benefits of leak repair and increasing the number of inlets to energy, A.Pornprommin , T.Wongwiset, S. Lipiwattanakarn, Thailand IWADP-020 Quality assurance analysis for the determination of copper ion in synthetic wastewater using Flame Atomic Absorption Spectrometer (FAAS),K.Supong , P.Usapein, Thailand IWADP-080 Photocatalytic treatment of 17β-estradiol using visible light active TiO2/ZnO nanocomposite,N.G.Menona, L.Georgeb, S.S.Tatipartia, S.Mukherjia, India

IWADP-086 Diffuse nutrient loading in an urbanised catchment in Singapore,V.T. Nguyen, K.H.Goh, Singapore

IWADP-084 Use of passive samplers to monitor polar organic micropollutants in waters treated for potable water supplies,V.Pettigrove , S.Sharp, G.Rose, J.Du, R.Kookana, M.Allinson, N.D.Crosbie, Australia IWADP-024 Fluorescence spectroscopy for assessing THM precursors removal by MIEX Resin, P.Jutaporn , W. Laolertworakula, O.Coronellc, Thailand IWADP-088 Kinetic and degradation pathway in photocatalystic oxidation

• f diclofenac using submerge membrane photocatalytic

reactor under visible irradiation,T.V.Tung ,J.Ananpattarachai, P.Kajitvichyanukul, Vietnam IWADP-057 w1 Electrodialytic recovery of ammonium and phosphate ions in fertilizer industry wastewater using a continuous-flow reactor,D.N.Hikmawati, A. Y.Bagastyo, I.D.A.A. Warmadewanthi, Indonesia

IWADP-091 Towards affordable fecal sludge treatment: solar greenhouse sand drying beds, A.Kuster , R.Junggoth, S.Pitaksanurat, P. Tantriratna, P. Jaipakdee,

• K. Soroschinda, C. Sirikoon, Thailand

IWADP-048 Evaluation on the application of bio-resources as filter media in bioretention systems, M.S.Jeon , J. S. Hong, F. K. F. Geronimo,

• H. S. Choi, and L. H. Kim, Korea

IWADP-047 Molecular insights into dissolved organic matter of textile secondary effluents,C.Cheng, J. Wu, M. Khan, B. Liu, C. Liu, China

IWADP-067 Performance characteristics of phosphorus removal in sewage treatment using electro-coagulation and fiber filtration process, T.Kim , G.Kim ,J.Jang ,H.Lee, Korea

10.20-10.40 Room A Water Management Room B Diffuse Pollution and Monitoring

9.00-10.20

EEAT experts, Thailand Ray Earle, Ireland and EEAT Expert, Thailand Break

• Prof. M-H.Park, USA and EEAT expert, Thailand

EEAT experts, Thailand Room C Water Innovation and Frontier Technology Room D Eutrophication and Nutrient Removal

IWADP-072

Removal of methylene blue dye from aqueous solution by water treatment sludge -TiO2 , S.Sumitsawan, P. Apaikawee, C. Suebkam, K. Kositkanawuth , Thailand

IWADP-052 Occurrence of trihalomethanes and haloacetonitriles in water distribution networks of Khon Kaen municipality, Thailand ,T.Ratpukdi, S.Sinorak, P.Kiattisaksiri, P.Punyapalakul, Thailand IWADP-092 Comparison of paraquat degradation in aqueous solution using N-doped TiO2 nanoparticles from different nitrogen Sources,P.Phuinthiang, J.Ananpattarachai, P.Kajitvichyanukul, Thailand

IWADP-012 Distribution, composition and ecological risk assessment of phthalic acid esters in surface sediment of Songhua river, China,H.WANG,Y.Y. Yang , L. li, Z. Zhong, Z.W. Li, T. Wu, China

IWADP-106 Reduction of disinfection by-product precursors by coagulation, adsorption, and membrane filtration,C.Musikavong,T.Plaidoung, A.Wongrueng, Thailand IWADP-117 Perfluoroalkane sulfonates (PFSAs) and heavy metals in surface water around an informal e-waste recycling site at Kalasin province, Thailand, S.Waiyarat , S.K.Boontanon, N.Boontanon, S.Sukeesan,S.Fujii, Thailand IWADP-089 Submerged membrane photocatalytic reactor for diclofenac degradation, detoxification and kinetics under UV irradiation and coupling with hydrogen peroxide,T.V.Tung , J.Ananpattarachai, P.Kajitvichyanukul, Vietnam

IWADP-017 Status assessment of urbanized surface water Environment in China,R.Liu,H.J Gao, L. Han, Y.H Song , China

IWADP-130 Removal of dichlorvos insecticides from aqueous solution using bacerial-immobilized activated carbon, P.Sukniyom , N.Promjan,Q.A.Binh, P.Kajitvichyanukul, Thailand IWADP-108 Pilot project of treatment of wastewater in a vertical flow constructed wetland with anaerobic treatment at feynan ecolodge in Jordan ,S. Al.Baz , R.A.Zou’bi, J.Götzenberger, Jordan IWADP-105 W1 Photocatalytic membrane for dye wastewater treatment using modified PVDF membrane,S. Sairiam , L. Penboon, Thailand

IWADP-032 From theory to practice: the emergence of systemic, adaptive governance in the transboundary Olifants river basin of Southern Africa,S.Pollard,H.Retief, South Africa IWADP-079 The Chao Phraya river basin: water quality and anthropogenic influences, N.Singkran, P. Anantawong, N. Intharawichian, K. Kunta, Thailand IWADP-066 Recognition of diffuse pollution impacts on water utilities,T.KAWATA , B.D’ARCY, H.LI, S.FUJII, Japan

12.00-13.00 10.40-12.00 Lunch

Date: November 21, 2018 Time Chairman 13.00-17.00

IWADP-141 James Ebdon , UK (To be announced) IWADP-082 Using geophysical techniques to assess potential leakage of mine water from tailing storage facility of a gold mine in Thailand,T.Phenrat , W. Maneechuket, T.Pladboon,S.Srirattana, Q.T.Ba, Thailand IWADP-065 Assessment of drains water used for irrigation in Delhi region,D.Gola ,A.Bhattacharya, A.Malik ,Z.Shaikh, Inidia IWADP-137 Diffuse Pollution Impacts - pollution diversity unified by weather dependency, James Brian , UK IWADP-015 Development of a risk-based model to predict diffuse microbial pollution from agriculture,D.M. Oliver , P.J.Bartie, S.M.Reaney, A.

• L. Heathwaite, J.Q. Parnell, R.S.Quilliam, UK

IWADP-026 Chemical speciation of molybdenum in river and pond sediments affected by mining activity in Erdenet city, Mongolia, K. Fukushi , T. Solongo , O. Altansukh , Y. Takahashi , A. Akehi , G. Baasansuren , D. Davaadorj and N. Hasebe , Japan

IWADP-128 Insights into the adsorption mechanism of dichlorvos onto modified coconut fiber biochar: The significant dependence of H-bonding interactions and pore filling mechanism,Q.A. Binh, P.Kajityichyanukul, Thailand

IWADP-070 Socio-economic factors of high trash generation in the city of Los Angeles ,M. Stenstrom , X.Liang, M.Park, USA IWADP-063 Enhancement of dissolved S2- removal from a heavily polluted river using an ex-situ enrichment culture process, X.Liu, C.Song, Y.Song, R.Liu, H.Gao, China IWADP-109 Decomposition of cyanide contaminations from gold extraction,

• A. Brüger , G. Fafilek, Austria

IWADP-090 Improvement of solar septic tank performance by recovering waste heat from a compressed air system,T.Pussayanavin , T.Koottatep , C. Polprasert, Thailand IWADP-053 Temporal variations in PAHs at Tsukumo bay during 2014–2017,T.Matsunaka, S. Nagao, N. Tang, M. Inoue, N. Suzuki, S. Ogiso, K. Hayakawa, Japan IWADP-111 Interaction between human adenovirus and environmental freshwater free-living amoebae, M. Leifels , R. Dey, A. Wiedemeyer, N. J. Ashbolt, Canada IWADP-033 Cyanide dynamics in catchments affected by artisanal gold mining in Burkina Faso,H. A. Andrianisa , L. C. Razanamahandry, , H. Karoui , H. Yacouba, Burkina Faso IWADP-096 Organic matter reduction in synthesis textile wastewater by membrane bioreactor,N.Puangmalai, P.Rakruam, Thailand IWADP-120 Human health risks with diffuse groundwater contamination in urban areas. A northern Italy case study , E.Sezenna , A.F. Mastorgio, S. Saponaro, Italy IWADP-134 Coastal water quality assessment along the gulf of Thailand using multiple parameters and sewage-specific bacteriophage indicators , A.Kongprajug , N.Chyerochana, S.Mongkolsuk, K.Sirikanchana, Thailand IWADP-073 Simulating the atmospheric dispersion of hydrogen cyanide (HCN) from a wastewater reservoir of a gold mine under different pH level scenarios,T.B.Quoc , T.Phenrat,W.Trivitayanurak, Thailand IWADP-098 The influence of pH adjustment on the reduction of organic pollutants with treatment by atmospheric argon plasma,S.Theepharaksapan , K.Matra , Thailand IWADP-123 Comparison of runoff characteristics of trace hazardous pollutants during storm events from different types of highways, A. Ichiki, S.Kinoshita,T. Kawai, Japan IWADP-112 Surveillance of enteric viruses and microbial indicators in surface water, seafood and pediatric patients with gastroenteritis in Brazil, R.Keller ,R. Pratte-Santos, E.Maciel, S.T.Cassini, T.Fumiam, M.Miagostovich, Brazil IWADP-075 Using lead stable isotope to determine sources of lead contamination in soil and sediments affected by Klity’s abandoned ore dressing facility in Kanchanaburi province, S.Srirattana , K.Piaowan, T.Imthieang, J.Suk-in, T.Phenrat, Thailand IWADP-099 Processing printing wastewater treatment by forward osmosis process,W.Maknakhon , W. Khongnakorna, Thailand IWADP-116 W3 Soil washing for the treatment of synthetic-based mud drill cuttings, T.Poyai, N. Chawaloesphonsiya,P.Painmanakul, Thailand

15.00-15.15

• Prof. J Ebdon, UK and K. Sirikanchana, Thailand
• Dr. T. Phenrat, Thailand and EEAT Expert, Thailand

EEAT Experts, Thailand

• Dr. J Brian, UK and EEAT Expert, Thailand

13.00-15.00 Break Room A Microbial Contamination and Health Room B Mine Water Contamination Room C Water Treatment and Technology Room D Diffuse Pollution Impacts

IWADP-114 Detection of pathogenic viruses in environmental samples from Kenya using the bag-mediated filtration system, J. S.Meschke , V.Z.WB, Z.NA, M.Wolfaardt , P.N.Matsapola, F.B.Ngwana , C.S.Fagnant-Sperati , J.H.Shirai , A.L.Kossik , Beck , USA IWADP-078 Magnetic-assisted soil washing cadmium contaminated farmland using zero valent iron or iron oxide particles with ferric chloride,

• P. Hongkumner d, H. Yang, Z. Lu,T. Phenrat, China

IWADP-104 Influence of aeration schemes on fouling control in hybrid microfiltration membrane filtration system,T.Miyoshi, Y. Takahashi, L. Zhang, R. Nitisoravut, C. Polprasert, Japan IWADP-034 Prediction model for cyanide soil pollution to preserve water resources, H.Anderson Andrianisa , L. C. RAZANAMAHANDRY, H. KAROUI , H. YACOUBA, Burkina Faso IWADP-121 Interaction between arcobacter butzleri and free-living amoebae indicate an increase in bacterial persistence, M.Oloroso , R.Dey, N.Ashbolt, Canada IWADP-076 Pilot-scaled demonstration of cadmium-contaminated paddy field restoration using soil amendment and magnetic-assisted soil washing,V.Khamin , T.Phenrat , J.Suk-in, Thailand IWADP-100 Humus bioreactor rural settlement challenge to use treated water for paddy field,H. Ogawa , Japan IWADP-030 Concentration factor of 17α-Methyltestosterone in water and sediments of long time use masculinizing pond,C.Math S. P. Thanasupsin, L. Chhean, Thailand IWADP-142 Microbial survey of household drinking water system using culture- dependent and metagenomic approach in a developing country,

• S. Bae , C. Lyons, N. Onstad, Singapore

IWADP-083 Using environmental isotopes and chemical characterization to assess potential leakage of mine water from tailing storage facility of a gold mine in Thailand, S.Laoharojanaphand , K.Khamdee, P.Chanruang, Thailand IWADP-085 Compressive strength degree of reaction and microstructure

• f geopolymer from HFA and CCR, k.S omna , Thailand

IWADP-060 Reactive black 5 decolorization by soil bacteria under mild conditions, D.P. Sari , S. Sairiam, P. Thuptimdang, Thailand IWADP-095 The performance of vetiver on heavy metals phytoremediation: laboratory investigation, D.Janjaroen , R.Wasino, S.Likitlersuang, Thailand 15.20-17.00

IWADP-001 Study on nanosilica immobilized effective microorganisms in NH4+-N removal,X.Mao, X.Shao, Z.Zhang, China IWADP-013 Water quality assessment for an off-stream reservoir in Taiwan,C.L.Chang , China IWADP-014 Adsorption of phosphate ion onto nickel-aluminum complex hydroxide at different molar ratio from aqueous solution,F.Ogata , M.Toda, M.Otani, T.Nakamura, N.Kawasaki, Japan IWADP-018 Biofertilizers from biogas plants: A source for antibiotic resistant bacteria and a hazard for ground water pollution?, P. Kämpfer , S.P. Glaeser, T. Schauss, Germany IWADP-027 Impacts of nonpoint source pollutants on microbial population in rain gardens, J. S. Hong , F. K. F. Geronimo, H. S. Choi, M. S. Jeon and L. H. Kim, Korea IWADP-028 Fate of heavy metals in infiltration garden treating parking lot runoff, K.Mikhail, S. Revilloza, F. K. F. Geronimo, L. H. Kim, Korea IWADP-035 Comparison of the pollutant removal performance of vegetated and non-vegetated BMPs in relation to seasonal variations, N.J.D.G. Reyes , F.K.F. Geronimo, L.H. Kim, Korea IWADP-038 Comparative methods for predicting cyanide pollution by using GIS tools ,H. A. Andrianisa , L. C. Raanamahadry, H. Karoui , J. Podgorski, H. yacoubac, Burkina Faso IWADP-039 Silver nanoparticles induce high toxicity to Scenedesmus acuminatus, chaetoceros gracilis and daphnia lumholtzi, T.L.Pham , M.H.Bui, Vietnam IWADP-041 Sustainable wastewater management technology for tourism in Thailand: case and experimental studies, W.Liamlaem , L.Benjawan , M.Yammanas C.Polprasert , Thailand IWADP-129 Biosorption and leaching behavior of cadmium in soil with bacteria immobilized biochar, N. Adum, P. Kajitvichyanukul, Thailand IWADP-049 Performance and kinetics of algal-bacterial biofilm photobioreactor for treating organics and nutrients in septic tank effluent , C.Chaiwong , N. Surinkul, T.Koottatep, C. Polprasert, Thailand IWADP-051 Quantification of water loss from Low impact development technologies, S.B.Gurung , F.Kevin , F. Geronimo, J.Hong, L.H.Kim, Korea

Poster presentation

IWADP-059 Forecasting industrial wastes to wastes disposal management by forecasting techniques ,S. Supawu , L.Krittiya, Thiland IWADP-068 A study on energy assessment and reduction for sewage treatment using EUAT and Tool- kit in Korea, J. Jang , H.Lee, Korea IWADP-071 Microbial risk assessment of drinking water filtration dispensers toll machine (DFTM) in Mahasarakham province of Thailand, J. Wibuloutai, P.Thanomsangad ,U.Mahaweerawat, Thailand IWADP-074 Evaluation groundwater quality by GIS and groundwater quality index case: study, Iran, N.Najafpour , H.Torabi Poodeh, Z.Mesmarian, N.V. Poor, Iran IWADP-097 Analysis of rainwater runoff reduction effect using storage capacity of Planter Box, K.Jeamoon , S. Hyunsuk, K.Byungsung , K.Saebom, Korea IWADP-102 Evaluation and application of hybrid LID system for urban stormwater management, S.W.Lee , J.H. Lee, S.M. Cha, Korea IWADP-107 Evaluation for TSS removal efficiency of LID permeable block, J.Y.Kim , Y.Choi, J.Kim, Y.Kwon, S. Kwon, Korea IWADP-115 Wastewater discharge capactity of Buong river basin, Vietnam: a modelling analysis, N.

• H. Quan , D.N.Khoi, N.V. Thinh, Vietnam

IWADP-119 Uptake and translocation of emerging contaminants from soil into vegetables , E.Sezenna , A.Mastorgio, S. Saponaro, Italy IWADP-133 Determination of formaldehyde contaminated water using paper-based screening test, T.Boonupara , P.Kajitvichyanukul, Thailand IWADP-126 Combined green synthesis of Ag/AgCl nanoparticles photacatalyst with garlic extract and its surface structures properties by density functional theory calculations ,S.Tongkamnoi, M.Phonyiem,P.Kajitvichyanukul , Thailand IWADP-124 Development of nano-silver coated ceramic water filter for antibacterial and organic pollutant removal, N.Nawinwattana ,Y.Mingmongkol, P. Kajitvichyanuku, Thailand IWADP-132 Percolation behavior of Paraquat and glyphosat in the soils with biocarbon, D.Keochanh , N.Promjan, P.Kajitvichyanukul, Thailand IWADP-146 Removal of Heavy Metal Ions in Drinking Water using Biomass, N.Kawasaki, F.Ogata , T.Nakamura , Jpan

Poster presentation