MARC details
| 000 -LEADER |
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| fixed length control field |
03219nam a22003137a 4500 |
| 003 - CONTROL NUMBER IDENTIFIER |
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| control field |
OSt |
| 005 - DATE AND TIME OF LATEST TRANSACTION |
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| control field |
20250711141908.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION |
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| fixed length control field |
250711b |||||||| |||| 00| 0 eng d |
| 040 ## - CATALOGING SOURCE |
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| Original cataloging agency |
TUPM |
| Language of cataloging |
English |
| Transcribing agency |
TUPM |
| Modifying agency |
TUPM |
| Description conventions |
rda |
| 050 ## - LIBRARY OF CONGRESS CALL NUMBER |
|---|
| Classification number |
BTH GF 41 |
| Item number |
B38 2025 |
| 100 ## - MAIN ENTRY--PERSONAL NAME |
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| Personal name |
Bautista, Ethan Domini A. |
| Relator term |
author |
| 245 ## - TITLE STATEMENT |
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| Title |
Green fabrication of paper-based chromium (vi) detector using sugarcane bagasse and tannin-crosslinked polyethyleneimine for water quality monitoring/ |
| Statement of responsibility, etc. |
Ethan Domini A. Bautista, Rochelle Ann V. Insigne, Marriane Angel A. Mandariaga, and Nathalie Joy M. Quezada.-- |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. |
|---|
| Place of publication, distribution, etc. |
Manila: |
| Name of publisher, distributor, etc. |
Technological University of the Philippines, |
| Date of publication, distribution, etc. |
2025. |
| 300 ## - PHYSICAL DESCRIPTION |
|---|
| Extent |
viii, 133pages: |
| Dimensions |
29cm. |
| 336 ## - CONTENT TYPE |
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| Source |
rdacontent |
| 337 ## - MEDIA TYPE |
|---|
| Source |
rdamedia |
| 338 ## - CARRIER TYPE |
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| Source |
rdacarrier |
| 500 ## - GENERAL NOTE |
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| General note |
Bachelor's thesis<br/><br/><br/> |
| 502 ## - DISSERTATION NOTE |
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| Dissertation note |
College of Science.--<br/> |
| Degree type |
Bachelor of science in environmental science: |
| Name of granting institution |
Technological University of the Philippines,<br/> |
| Year degree granted |
2025. |
| 504 ## - BIBLIOGRAPHY, ETC. NOTE |
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| Bibliography, etc. note |
Includes bibliographic references and index. |
| 520 ## - SUMMARY, ETC. |
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| Summary, etc. |
Preliminary water quality assessments identified chromium (Cr) as a significant<br/>contaminant in the Pasig River, emphasizing the need for continuous and real-time<br/>monitoring. However, current detection methods are costly, complex, and require technical<br/>expertise, limiting them to centralized laboratories. This study developed a low-cost,rapid,<br/>and portable method for selective Cr(VI) detection using sugarcane bagasse (SCB) and<br/>tannin-crosslinked polyethylenimine (TA-PEI) by using the color-changing complex<br/>instigated by the reduction of Cr(VI) in solutions as a colorimetric standard used to quantify<br/>chromium concentrations. After product optimization and comparison of methods, the<br/>colorimetric data collected from known Cr(VI) solutions yielded a strong linear regression<br/>with R2=0.9865 using the Eluate method, demonstrating a proportional relationship<br/>between blue channel intensity (IB) and Cr(VI) concentration. The selectivity of the<br/>chromogenic agent was also validated through tests with copper (Cu) and the organic<br/>pollutant nonylphenol, which showed no significant interference with Cr adsorption or the<br/>resulting color intensity changes. In field testing, the eluate method amounted to an<br/>estimated Cr concentration of 0.0724 ppm; while not yet validated for field deployment,<br/><br/>the results provide a reliable foundation for laboratory simulations. Moreover, the PEI-TA-<br/>coated SCB showed excellent adsorption of Cr in lower concentrations, with a 76% Cr<br/><br/>adsorption in 0.5 ppm solution and an adsorption capacity of 2.45 mg/g, all in consistent<br/>conditions and a pH value of 3. Additionally, the conducted community survey findings<br/>indicate that although awareness of environmental monitoring and stewardship is limited,<br/>residents are receptive to sustainable practices and open to adopting the detection method<br/>developed in the study. |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM |
|---|
| Topical term or geographic name entry element |
Sugarcane bagasse (SCB) |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
Tannic acid-polyethyleneimine (TA-PEI) |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
Colorimetric detection |
| 700 ## - ADDED ENTRY--PERSONAL NAME |
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| Personal name |
Insigne, Rochelle Ann V. |
| Relator term |
author |
| 700 ## - ADDED ENTRY--PERSONAL NAME |
|---|
| Personal name |
Mandariaga, Marriane Angel A. |
| Relator term |
author |
| 700 ## - ADDED ENTRY--PERSONAL NAME |
|---|
| Personal name |
Quezada, Nathalie Joy M. |
| Relator term |
author |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) |
|---|
| Source of classification or shelving scheme |
Library of Congress Classification |
| Koha item type |
Bachelor's Thesis COS |
| Suppress in OPAC |
No |