- 期刊
矽酸鈉對土壤表面電荷及穩定性之影響
Effect of Sodium Silicate on the Surface Charge and the Stability of Howlii and Fengshan Soils
摘要
本文係探討矽酸鈉對土壤表面電荷及穩定性的影響，而主要目的乃在探討矽酸根離子對土壤的效應。試驗是以后里紅壤及鳳山黃壤爲材料，將矽酸鈉噴灑於土壤，使這兩種土壤各含0，0.5，1.0，1.5％等四種矽酸鈉含量。然後測定土壤零電點（pH。），土壤團粒穩定性，土壤膨脹性及阿太堡限界，所得結果如下：1.后里紅壤及鳳山黃壤之土壤零電點隨矽酸鈉處理量的增加而降低，使土壤表面負電荷量隨矽酸鈉處理量的增加而增高。2.由多重濕篩法測定土壤團粒穩定性，結果顯示后里紅壤經1.0％及1.5％矽酸鈉處理土壤較0％處理的土壤有顯著的增高土壤團粒穩定。而0.5％矽酸鈉處理的土壤團粒穩定性稍低於0％表現。另鳳山黄壤中0.5，1.0，1.5％矽酸鈉處理的土壤都比0％處理者有較高的團粒穩定性。3.土壤膨脹性試驗的結果，后里紅壤顯示0.5％矽酸鈉處理較0，1.0，1.5％矽酸鈉處理有較高的膨脹量。而在鳳山黄壤的試驗上，發現1.0％，1.5％矽酸鈉處理有較高的膨脹性。4.由阿太堡限界測定的結果，不論是后里紅壤或是鳳山黃壤，都隨矽酸鈉處理量的增加而有降低土壤液性限度及塑性指數的效應。由以上結果，可以看出矽酸根離子會降低土壤零電點，提高土壤表面負電荷量，多量施用且能增加土壤的穩定性。
關鍵字
無資料並列摘要
The purpose of this paper is to study the effect of sodium silicate on the soil surface charge and stability. The focus of this paper is to the effect of silicate ion on the soil. The formula of the applied sodium silicate is Na_2 O‧XSiO_2, X=3.6814, and its specific gravity 1.4. Sodium silicate solution was sprayed on the soil to make each soil containing four concentrations of 0%, 0.5%, 1.0%, and 1.5, respectively. Treated samples were stored in the plastic bags for three months, and then measured the zero point of charge (pH_0), the aggregate stability, swelling, and Atterberg limits. From the data obtained, we can see the following facts: (1) .The zero point of charge of both soils decreased with increasing sodium silicate application, and thus increased their negative surface charge. (2) The Howlii soil samples treated with 1.0% and 1.5% sodium silicate had higher aggregate stability than the other two. The 0.5% sodium silicate treatment, however, had slightly lower aggregate stability than the zero treatment. The Fengshan soil smaples treated with 0.5%, 1.0% and 1.5% had higher aggregate stability than the zero treatment. (3) The results of soil swelling test showed that the Howlii soil treated with 0.5% sodium silicate had higher swelling than those with the other three treatments. (4) Both soils decreased the liquid limits and the plastic indice with increasing sodium silicate application. In general, silicate application lowers the pH_0., and thus increases the negative surface charge and the stability of both Fengshan arid Howlii soils.