04050nas a2200433 a 4500 20260818153920.0 060702s2005 th uu|m rtt 0| a1eng d .b11990259 AIT Thesis no.EV-05-38 Shinen, Batdelger Major exposure pathway of mercury in children due to gold mining activity "a case study of small - scale gold mining in Phanom Pha, Phichit Province, Thailand" Pathum Thani, Thailand : Asian Institute of Technology, 2005 61 leaves : ill. Thesis ; no. EV-05-38 Thesis (M.Eng.) - Asian Institute of Technology, 2005 A thesis submitted in pa1iial fulfillment of the requirement for the degree of Master of Engineering The field survey was conducted at Khao Phanom Pha School located near the gold mining site in Phichit Province. Thailand. The main purpose of this study was to identify the major source of exposure to mercury in children living near the gold mining site, estimate the extent of mercury exposure and the level of concentration, evaluate the health effects on children and review available methods to minimize mercury exposure at Phanom Plia small scale gold mining site. A questionnaire was sent to 59 schoolchildren aged from 3 to 18 years. All participants were surveyed by questionnaire for health history, residence, dietary habits and hygienic behaviour. Fish samples from contaminated site were collected to represent the most frequently consumed species. Mercury concentration was determined in drinking water, Neem tree vegetable and rice samples. Hair mercury and urine creatinine concentrations were determined in scalp hair and urine of 59 school children. The Inductively Coupled Plasma was used to determine the total mercury concentration. Samples were digested in acid medium. Statistical significance of data was computed by Chi Square (X2) test. Moreover, the effect of various independent variables that might influence the mercury concentrations was also studied by crosstab analysis. Results obtained from the questionnaire and laboratory analysis showed that children working in gold mining site after school and frequently consuming fish are the critical group concerning mercury risk. Fish samples were showed levels ranging from 0.14 to 0.46 g/g of total mercury. The urine levels were ranged 20.20-39.6 pg/g creatinine. The mean of mercury concentration in hair was 2.34 g/g. For average school children, dietary exposures to total mercury were 5.25g/kg bw,'week. The results from field study showed that school children would be exposed to mercury due to long term regular consumption of locally grown vegetables, rice and fish Gold mines and mining Thailand Pichit Mercury in the body Mercury Toxicology Thailand Pichit Preeda Pakpian, Chairperson Visavanathan, C., Examination committee Aramaki, Toshiya, Examination Committee Asian Institute of Technology, Scholarship donor Asian Institute of Technology. Thesis ; no. EV-05-38 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B09457 .b11990259 mnait u 240401 0 060702 m a u 0 mnait mnait mnarc 20 40 Barcode : 30050120737233 CREATED : 2005-02-02 RECORD # : i12490313 LPATRON : 1015208 LCHKIN : 2008-11-01 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 2 TOT RENEW : 2 Barcode : 30050120737209 CREATED : 2005-02-02 RECORD # : i12490325 LPATRON : 1019909 LCHKIN : 2008-03-28 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 4 TOT RENEW : 2 Barcode : 30050160050430 CREATED : 2016-05-25 RECORD # : i12991685 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 71314 71314 0 0 0 0 MAIN MAIN mnait 2026-08-18 50.00 0 AIT Thesis no.EV-05-38 30050120737233 2026-08-18 15:39:20 1 2026-08-18 20 0 0 0 0 MAIN MAIN mnait 2026-08-18 50.00 0 AIT Thesis no.EV-05-38 30050120737209 2026-08-18 15:39:20 2 2026-08-18 20 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no.EV-05-38 30050160050430 2026-08-18 15:39:20 2026-08-18 40