Application of diffusive gradient in thin films technique for mercury bioavailability prediction in soil
➤ Gửi thông báo lỗi ⚠️ Báo cáo tài liệu vi phạmNội dung chi tiết: Application of diffusive gradient in thin films technique for mercury bioavailability prediction in soil
Application of diffusive gradient in thin films technique for mercury bioavailability prediction in soil
Dissertation for Degree of Ph.D.Application of diffusive gradient in thin films technique for mercury bioavailability prediction in soilNguyen Huu Vie Application of diffusive gradient in thin films technique for mercury bioavailability prediction in soiletSchool of Earth Sciences and Environmental EngineeringGwangju Institute of Science and Technology (GIST)2021Application of diffusive gradient in thin films technique for mercury bioavailability prediction in soilAdvisor: Professor Seunghee HanByNguyen Huu VietSchool of Earth Sciences and Environme Application of diffusive gradient in thin films technique for mercury bioavailability prediction in soilntal EngineeringGwangju Institute of Science and Technology (GIST)A thesis submitted to the faculty of Gwangju Institute of Science and Technology inApplication of diffusive gradient in thin films technique for mercury bioavailability prediction in soil
partial fulfillment of the requirement for the degree of Doctor of Philosophy in the School of Earth Sciences and Environmental EngineeringGwangju, ReDissertation for Degree of Ph.D.Application of diffusive gradient in thin films technique for mercury bioavailability prediction in soilNguyen Huu Vie Application of diffusive gradient in thin films technique for mercury bioavailability prediction in soilprediction in soilNguyen I luu VietAccepted in partial fulllllmenl of the requirement of the degree of Doctor ofPhilosophyMay 315‘, 2021Dissertation advisorProf. Seunghee Han c ommittee memberProf. Kyoung-Woong Kim c ommittee memberProf. Chang-Keun Kang Committee memberProf. Yongscok' 1 long Committ Application of diffusive gradient in thin films technique for mercury bioavailability prediction in soilee memberProf. Nguyen Phuoc DanPhD./EN 20144049Nguyen Huu Viet. Application of diffusive gradient in thin films technique for mercury bioavailabilityApplication of diffusive gradient in thin films technique for mercury bioavailability prediction in soil
prediction in soil. School of Earth Sciences and Environmental Engineering. 2021. Pl27. Advisor: Seungliee Han (£l£s|).AbstractThe technique of diffusDissertation for Degree of Ph.D.Application of diffusive gradient in thin films technique for mercury bioavailability prediction in soilNguyen Huu Vie Application of diffusive gradient in thin films technique for mercury bioavailability prediction in soil its applicability is subject to the type of metal and organism involved. The theoretical aspect and application of DGT to measure in situ speciation and bioavailability of diverse metal pollutants in soils were introduced in the first chapter. In the second chapter, the accumulated masses of Hg in Application of diffusive gradient in thin films technique for mercury bioavailability prediction in soilDGT probes and in the earthworm species Eisenia fetida were monitored for 10 days, to test if the DGT technique can be used as a predicting method forApplication of diffusive gradient in thin films technique for mercury bioavailability prediction in soil
the bioavailability of soil Hg to earthworms. The Hg exposure tests were conducted using freshly prepared artificial soils with different peat moss cDissertation for Degree of Ph.D.Application of diffusive gradient in thin films technique for mercury bioavailability prediction in soilNguyen Huu Vie Application of diffusive gradient in thin films technique for mercury bioavailability prediction in soilrates by DGT and earthworms were considerably higher for fresh soils than for aged soils, while pore water (and acid-extractable) Hg concentrations were rather similar between the two types of soils. DGT-measured Hg flux used to assess bioavailability in earthworm showed a strong positive correlatio Application of diffusive gradient in thin films technique for mercury bioavailability prediction in soiln with steady-state Hg concentration in earthworm ((earthworm Hg] = 354(DGT-Hg flux) - 34. R- = 0.88). The overall results indicate that DGT-measuredApplication of diffusive gradient in thin films technique for mercury bioavailability prediction in soil
Hg flux is a better tool than the conventional methods for predicting Hg bioavailability for earthworms inhabiting diverse types of soil. In the thirdDissertation for Degree of Ph.D.Application of diffusive gradient in thin films technique for mercury bioavailability prediction in soilNguyen Huu Vie Application of diffusive gradient in thin films technique for mercury bioavailability prediction in soilal-contaminated soils collected from Gumu Creek, atributary of the Hyeongsan River. The correlation analysis showed water holding capacity is the key variable of soil properties related to Hg accumulation in the soil, earthworm, and binding gel. Indeed, the water-holding capacity played a dual role Application of diffusive gradient in thin films technique for mercury bioavailability prediction in soilin the Gumu Creek deposits: increasing the soil Hg concentration and decreasing Hg bioavailability and leachability. DGT-Hg flux showed a positive corApplication of diffusive gradient in thin films technique for mercury bioavailability prediction in soil
related with the Hg concentration in earthworms (r = 0.93). The results of this chapter proved that the DGT method is promising for predicting soil HgDissertation for Degree of Ph.D.Application of diffusive gradient in thin films technique for mercury bioavailability prediction in soilNguyen Huu Vie Application of diffusive gradient in thin films technique for mercury bioavailability prediction in soil. In the last chapter, the aging effect of Hg, one of the most important factors controlling Hg bioavailability in soil, was studied using diverse types of field soils. Surface soil samples were collected from forestry, agriculture, and riverbank sites (Youngsan and Hyeongsan river). The soil sample Application of diffusive gradient in thin films technique for mercury bioavailability prediction in soils were spiked with inorganic Hg(II) and incubated for 1. 3. 5. 8. 15. 25.40. 60 and 90 days. We found that, during the aging process, the proportionsApplication of diffusive gradient in thin films technique for mercury bioavailability prediction in soil
of Hg tended to migrate from mobile fraction to the stable binding fractions. Effective Hg concentration (Ce) was estimated by DGT and DIFS model, as Dissertation for Degree of Ph.D.Application of diffusive gradient in thin films technique for mercury bioavailability prediction in soilNguyen Huu Vie Application of diffusive gradient in thin films technique for mercury bioavailability prediction in soiltant (ki) obtained by fining the Ce values using pseudo-first order kinetic model. Partial Least Square regression (PLSR) model was used to relate various soil properties to the variations of ki in those soils. PLS model constructed by cross-validation and variable selection routines predicted 31% o Application of diffusive gradient in thin films technique for mercury bioavailability prediction in soilf ki when applied to entire soil samples, but 73 - 92% of k] was predicted when applied to specific soil type. The results showed that variation of kiApplication of diffusive gradient in thin films technique for mercury bioavailability prediction in soil
was mainly predicted by soil pH and organic matter content. The overall results indicate that the combination of DGT technique and PLSR method is a uDissertation for Degree of Ph.D.Application of diffusive gradient in thin films technique for mercury bioavailability prediction in soilNguyen Huu VieDissertation for Degree of Ph.D.Application of diffusive gradient in thin films technique for mercury bioavailability prediction in soilNguyen Huu VieGọi ngay
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