MARC details
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03306nam a2200253 c 4500 |
| 003 - CONTROL NUMBER IDENTIFIER |
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CHED |
| 005 - DATE AND TIME OF LATEST TRANSACTION |
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20250128142246.0 |
| 007 - PHYSICAL DESCRIPTION FIXED FIELD--GENERAL INFORMATION |
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ta |
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250128e2018 ph ||||| |||| 00| 0 eng d |
| 040 ## - CATALOGING SOURCE |
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| Transcribing agency |
Commission on Higher Education |
| 100 1# - MAIN ENTRY--PERSONAL NAME |
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| Personal name |
Santillan, Bertrand Aldous L. |
| 245 00 - TITLE STATEMENT |
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| Title |
Characterization and heavy metal pollution assessment of sediments from Laguna de Bay, Philippines |
| Statement of responsibility, etc. |
/ Bertrand Aldous L. Santillan |
| 260 3# - PUBLICATION, DISTRIBUTION, ETC. |
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| Place of publication, distribution, etc. |
Los Baños |
| Name of publisher, distributor, etc. |
: University of the Philippines |
| Date of publication, distribution, etc. |
,2018. |
| 300 ## - PHYSICAL DESCRIPTION |
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| Extent |
xiv,183 leaves |
| Dimensions |
27 x21cm. |
| 500 ## - GENERAL NOTE |
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| General note |
Thesis (Master of Science in Environmental Science) -- University of the Philippines Los Baños, December 2018. |
| 520 3# - SUMMARY, ETC. |
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| Summary, etc. |
Laguna de Bay, the largest lake in the Philippines, is threatened by worsening<br/>environmental quality due to the negative impacts of urbanization and industrialization.<br/>One of the issues pressuring the lake is shallowing due to increased sedimentation. Plans<br/>are underway to dredge the sediments to restore the lake. However, little is known about<br/>the quality of the lake sediments especially its pollutant concentrations. In this study,<br/>sediments in the South Bay wereinvestigated for its geochemical characteristics and heavy<br/>metal pollution. Sediment cores from the upper >I m ofthe lakebed were collected from<br/>eight locations around the South Bay. The cores were macroscopically analyzed before<br/>subsampled at 2.5 cm intervals, dried, analyzed for water content and total organic matter<br/>content, sieved up to 63 m and analyzed for grain size anti to 1 heavy metals usingXRF<br/>and ICP-OES. Resul s ofthe analyses showed that water content differs between cores, the<br/>average total OM is at 11 %, and grain size and total HM differ among core locations and<br/>depth. Ten HM ofindustrial significance were assessed using four single indices: EF, Igeo,<br/>CF and AF, and four integrated indices: PLI, NPI, mCd, and RI. It was found that Sn and<br/>Pb are highly enriched and strongly contaminated, while Sb has moderate enrichment and<br/>contamination, the rest are minimal. As is the least enriched and polluted. Ordinary kriging<br/>interpolation was used to show the spatial distribution of pollution indices. It was found<br/><br/>that the San Cristobal River mouth area is highly polluted, primarily by Sn, while the mid-<br/>lake is moderately polluted, primarily by Pb. Potential sources ofSn and Pb were identified<br/><br/>by inspecting the industrial activities in the area, as well as other lake dynamics. The<br/>ecological risk assessment showed considerable risk in the San Cristobal River mouth and<br/>moderate risk in the mid-lake. Decision and policy makers should consider the Sn, Pb, and<br/>Sb pollution in the management of sediments and the monitor the discharges of industrial<br/>parks to the lake. |
| 650 10 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
Sediments (Geology) |
| General subdivision |
Environmental aspects |
| Geographic subdivision |
Philippines |
| 650 20 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
Heavy metals |
| General subdivision |
Environmental aspects |
| Geographic subdivision |
Philippines |
| 650 20 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
Pollution |
| General subdivision |
Environmental aspects |
| Geographic subdivision |
Philippines |
| 650 20 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
Laguna de Bay (Philippines) |
| General subdivision |
Environmental conditions |
| 856 40 - ELECTRONIC LOCATION AND ACCESS |
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| Uniform Resource Identifier |
<a href="http://181.215.242.151/cgi-bin/koha/opac-retrieve-file.pl?id=016691be4f165787756fe785f997b4f9">http://181.215.242.151/cgi-bin/koha/opac-retrieve-file.pl?id=016691be4f165787756fe785f997b4f9</a> |
| Public note |
Abstract |
| 856 40 - ELECTRONIC LOCATION AND ACCESS |
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| Uniform Resource Identifier |
<a href="http://181.215.242.151/cgi-bin/koha/opac-retrieve-file.pl?id=809ef1d2778b945c61b1d3f419540998">http://181.215.242.151/cgi-bin/koha/opac-retrieve-file.pl?id=809ef1d2778b945c61b1d3f419540998</a> |
| Public note |
Table of Contents |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) |
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| Source of classification or shelving scheme |
Library of Congress Classification |
| Koha item type |
CHED Funded Research |
| Suppress in OPAC |
No |
