| 000 | 03965nas a2200445 a 4500 | ||
|---|---|---|---|
| 005 | 20260817161346.0 | ||
| 008 | 220428s2021 th uu m rtt 0| a1eng d | ||
| 035 | _a.b12382206 | ||
| 099 | 9 | _aAIT RSPR no.MPA-21-11 | |
| 100 | 1 | _aTutor, Jasmin Tumanda | |
| 245 | 1 | 0 | _aAbundance and spatial distribution of microplastics in the Lower Chao Phraya River |
| 260 |
_aPathum Thani, Thailand : _bAsian Institute of Technology, _c2021 |
||
| 300 |
_a80 leaves : _bill. |
||
| 490 | 1 |
_aResearch studies project report ; _vno. MPA-21-11 |
|
| 500 | _aA research study submitted in partial fulfillment of the requirements for the degree of Master in Marine Plastics Abatement | ||
| 502 | _aResearch studies project report (M.) - Asian Institute of Technology, 2021 | ||
| 520 | _aStudies on MP contamination in freshwater environments are relatively scarce compared to that of marine environments. This is especially true for freshwater environments in Asia. In this research, the MP abundance, spatial distribution, and variability were studied in order to gain a better understanding of MP occurrence in the Chao Phraya River, an important river system in Thailand. Samples of microplastics were taken using a device called Albatross along the lower Chao Phraya River covering the provinces of Pathum Thani, Nonthaburi, and Bangkok. To assess their vertical distribution, samples were also taken at 30 cm and 60 cm depths at the most upstream and downstream sites of the study area. Samples were pre-treated through wet peroxide oxidation and density separation. A microscopic examination was conducted to categorize MPs based on size, morphology, and color. MPs were analyzed through FTIR to identify their polymer types. MP abundance ranged from 2.92 to 35.53 n/m3 with a mean abundance of 9.84 n/m3 . Fibers were the most abundant upstream and fragments were most observed downstream. MP abundance were higher in more urbanized areas and on surface level. It tends to decrease as depth increases. Majority of the MP were small-sized (0.5-1 mm) and medium-sized (1-2.5 mm). Most MPs were found to be transparent and white and PET, PE, and PP were the most observed polymer types. This is the first study that comprehensively explored the vertical and horizontal distribution of size, shapes, colors, and polymer types of MP in the surface water level of the lower Chao Phraya River. Future studies may explore on other areas on the river to provide a more thorough understanding of MP contamination in the Chao Phraya River. | ||
| 650 | 0 |
_aMicroplastics _zThailand _zLower Chao Phraya River |
|
| 700 | 1 |
_aXue, Wenchao, _eChairperson |
|
| 700 | 1 |
_aVisvanathan, C., _eExamination Committee |
|
| 700 | 0 |
_aHo Huu Loc, _eExamination committee |
|
| 710 | 2 |
_aGovernment of Japan, _eScholarship Donor |
|
| 810 | 2 |
_aAsian Institute of Technology. _tResearch studies project report ; _vno. MPA-21-11 |
|
| 856 |
_3Full-Text _uhttp://203.159.5.9/ait-thesis/detail.php?q=B16279 |
||
| 907 |
_a.b12382206 _bmnait _cm |
||
| 902 | _a240419 | ||
| 998 |
_b0 _c220428 _dm _eb _fm _g0 |
||
| 945 | _lmnait | ||
| 945 | _lmnait | ||
| 945 | _lmnarc | ||
| 945 | _lmnarc | ||
| 942 | _c67 | ||
| 942 | _c40 | ||
| 942 | _c20 | ||
| 909 |
_aBarcode : - _bCREATED : 2022-04-03 _cRECORD # : i13371629 _dLPATRON : 0 _eLCHKIN : - _f# RENEWALS : 0 _g# OVERDUE : 0 _hIUSE3 : 0 _iTOT CHKOUT : 0 _jTOT RENEW : 0 |
||
| 909 |
_aBarcode : 30050120884753 _bCREATED : 2022-12-05 _cRECORD # : i13378697 _dLPATRON : 0 _eLCHKIN : - _f# RENEWALS : 0 _g# OVERDUE : 0 _hIUSE3 : 0 _iTOT CHKOUT : 0 _jTOT RENEW : 0 |
||
| 909 |
_aBarcode : 30050121023492 _bCREATED : 2023-04-01 _cRECORD # : i13421335 _dLPATRON : 0 _eLCHKIN : - _f# RENEWALS : 0 _g# OVERDUE : 0 _hIUSE3 : 0 _iTOT CHKOUT : 0 _jTOT RENEW : 0 |
||
| 909 |
_aBarcode : 30050121023484 _bCREATED : 2023-04-01 _cRECORD # : i13421347 _dLPATRON : 0 _eLCHKIN : - _f# RENEWALS : 0 _g# OVERDUE : 0 _hIUSE3 : 0 _iTOT CHKOUT : 0 _jTOT RENEW : 0 |
||
| 999 |
_c997 _d997 |
||