林正芳2006-07-262018-06-282006-07-262018-06-281998-07-31http://ntur.lib.ntu.edu.tw//handle/246246/22017本研究旨在探討及量化合成沸石穩定 土壤中重金屬的成效，並希望能建立一評 估模式預測受重金屬污染土壤添加合成沸 石後，重金屬在土柱垂直方向的分佈，進 行的研究項目包括土壤對鎘、銅、鋅的等 溫平衡吸附實驗、土柱淋洗試驗及建立評 估模式三部分，實驗土樣則有平鎮系、仁 德系、將軍系及二林系等四種台灣代表性 土壤。This research investigated the effect of synthesized zeolite on stabilizing Cd, Cu, and Zn contaminated soil and also developed model for simulating metal transport in soil columns. The experimental work addressed adsorption equilibrium of metals on soils, metal leaching from soil columns, and metal transport model in soil environment. Specifically, four soil samples, Pinchen,Jente, Erlin, and Chengchung, were obtained as representatives of local soil series. In batch adsorption experiments, metals in solution phase will compete for the reacting sites in soil surfaces. In system containing all three metal ions, Cu preferentially outcompetes Zn and Cd for sorption on soils. Sorption of Cd exhibits the weakest affinity for the surface reactions. Thus, in the presence of Cu and Zn, the sorption density of Cd is dramatically reduced by the competition among metals. Adding zeolite in soil mixtures will greatly enhance the holding capability of soils on metals, specifically Cd on Jente soil samples. However, zeolite addition provides less significant effect on Cu as well as Zn sorption. The effects of zeolite addition on metal sorption onto soils can be modeled using Freundlich isotherm by considering the alternation of soil cation change capacity (CEC). The linear relationship between Freundlich adsorption constant K and soil CEC at various zeolite addition was developed. This linear equation is very useful in predicting adsorption ability of soil with some amounts of zeolite addition in terms of Freundlich K. Thereafter, the parameters necessary for pollutant advection-dispersion-adsorption model is obtainable. The model is then used for simulating Cd (30 mg/kg-soil) , Cd, and Zn (300 mg/kg-soil) migration in zeolite amended soil columns. The model outputs provides reasonable data for understanding the reaction as well as metal transport in soil column, especially for metal contamination level in the range of 30 to 300 mg/kg-soil. Nevertheless, this model was unable to offer acceptable results for the system with high metal concentration such as 100 mg-Cd/kgsoil and 1000 mg-Cu-Zn/kg-soil.application/pdf245025 bytesapplication/pdfzh-TW國立臺灣大學環境工程學研究所合成沸石土壤重金屬穩定化線性迴歸平衡等溫吸附Freundlich 吸附方程式一維傳輸模式synthesized zeoliteheavy metal in soilstabilizationlinear regressionadsorption isothermFreundlich equation Model[SDGs]SDG11reporthttp://ntur.lib.ntu.edu.tw/bitstream/246246/22017/1/872621P002014.pdf