碩士 / 弘光科技大學 / 環境工程研究所 / 107 / Although the industrial revolution has vigorously enhanced the human life quality, hidden crises indeed exist behind the prosperity and progress. There were some farmlands contaminated by industrial pollution may threat human for reducing and insufficient food production. Moreover, the increasing global population approached to 7.7 billion by May 2019. The author’s university locates in the central coastal area of Taiwan where encompass some large industrial parks, power plant and other factories with high pollution potential. In order to realize the impact of farmlands nearby the industrial area, this study aimed to investigate the farmland soil quality in the coastal area of central Taiwan including Taichung and Changhua. The field X-ray fluorescence (FPXRF) analyzers are often utilized for site rapid screening of soil samples to obtain the higher concentrations. Then, they were delivered to lab for accurate analysis by inductively coupled plasma atomic emission spectrometry (ICP-OES) to reduce cost including sample volume, human resources and detection time. Prior to ICP-OES, the microwave-assisted aqua regia digestion was made for pretreatment of soil samples. The objective of this study was to investigate and evaluate the farmland soil quality as well as potential contamination sources with heavy metal concentrations excess the regulated standards including monitoring standards or control standards. Moreover, the correlations between FPXRF fast screening and ICP-OES analysis of soil heavy metals were also evaluated.
The total 136 samples collected from November 4, 2015 to May 29, 2018 were analyzed 5 metals such as chromium (Cr), copper (Cu), nickel (Ni), lead (Pb) and zinc (Zn) by FPXRF and ICP-OES. The results showed that most samples were met the food crop soil control standards of 91.2% except 20.6% over the soil monitoring standards. The soil sample concentrations over regulatory standards were of 8.8%. Besides, linear regression was evaluated by FPXRF (dry soil<10% moisture) and ICP-OES analysis that the determination coefficient R2 of Cr, Cu, Ni, Pb and Zn were 0.9125, 0.9061, 0.9002, 0.9135 and 0.9056, respectively. The above R2 of five heavy metals were high and similar to the literature. From the results, the operations of industrial parks or manufacturing may affect the surrounding farmland soil quality. The high Cr concentrations were covered the wide area including Taichung of Dajia, Qingshui, Shalu, Longjing, Dadu, Ho-li and Xiqiao as well as Changhua of Shengang, Xianxi and Hemei. The highest concentration 691.88 mg/kg of Cr was observed from east side of Dajia Youth industrial park which was about 2.76 times of the food crop soil control standards (250 mg/kg). In addition, Zn concentrations over food crop soil control standards were located in Longjing and Houli of Taichung. The highest concentration 899.72 mg/kg of Zn was from Longjing which was about 1.5 times of the food crop soil control standards (600 mg/kg). Cu concentrations over the monitoring standards were in Longjing of Taichung. Ni concentrations over the monitoring standard were in Xianxi of Changhua. Part of sample size was not sufficient to evaluate the farmland soil quality so that increases the sampling quantity and frequency for representative soil samples in the future upon the situations.
| Identifer | oai:union.ndltd.org:TW/107HKU00515005 |
| Date | January 2019 |
| Creators | ZHAI, BO-RU, 翟伯儒 |
| Contributors | CHANG, MING-CHIN, 張明琴 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 160 |
Page generated in 0.0128 seconds