20xx關于粉末狀石膏修復菱鎂礦土壤污染的研究精選(已修改)
2025-03-30 03:23 本頁面
【正文】 關于粉末狀石膏修復菱鎂礦土壤污染的研究關于粉末狀石膏修復菱鎂礦土壤污染的研究 本文關鍵詞：菱鎂礦，粉末狀，土壤污染，石膏，修復關于粉末狀石膏修復菱鎂礦土壤污染的研究 本文簡介：摘要：菱鎂礦在煅燒制備氧化鎂過程中產生大量的氧化鎂粉塵，降落到土壤外表容易構成土壤結皮，降低土壤孔隙度，減弱土壤浸透速率。采納土柱淋洗方式在室內模仿氧化鎂粉塵對土壤的浸透性阻礙及修復過程。向土柱中的土壤參加氧化鎂粉塵模仿自然條件下氧化鎂粉塵對土壤浸透速率阻礙；以石膏作為改良劑通過與氧化鎂粉塵及土壤混關于粉末狀石膏修復菱鎂礦土壤污染的研究 本文內容：摘要：菱鎂礦在煅燒制備氧化鎂過程中產生大量的氧化鎂粉塵， 降落到土壤外表容易構成土壤結皮， 降低土壤孔隙度， 減弱土壤浸透速率。采納土柱淋洗方式在室內模仿氧化鎂粉塵對土壤的浸透性阻礙及修復過程。向土柱中的土壤參加氧化鎂粉塵模仿自然條件下氧化鎂粉塵對土壤浸透速率阻礙；以石膏作為改良劑通過與氧化鎂粉塵及土壤混合調查石膏修復氧化鎂粉塵污染土壤的效果， 并用電鏡觀察石膏作用前后土壤外表形態(tài)變化。結果說明： mmmin1。 mmmin1, 氧化鎂粉塵污染土壤浸透速率顯著降低 （Plt。） 。 mmmin1, 與氧化鎂粉塵污染土壤相比， 參加石膏后土壤浸透速率顯著提高 （Plt。） 。電鏡圖顯示， 參加石膏后土壤外表呈網狀構造， 土壤外表的孔隙度及穩(wěn)定性提高， 有利于改善土壤浸透功能。 關鍵詞：菱鎂礦區(qū)； 土壤結皮； 浸透速率； 石膏； Experimental study on soil pollution and restoration in magnesite area Abstract:Magnesium oxide dusts produced during calcination fall to the soil surface and easily form magnesian soil crust in magnesite mining area, which would reduce soil porosity, weaken soil infiltration rate, and be harmful to soil quality. Using a soil column leaching device, an experiment was carried out to examine the influence of magnesium oxide dust on soil infiltration and the processes of soil remediation. Soil crust was formed by adding magnesium oxide dust to the soil column, gypsum was used as a modifier to inhibit the formation of crusts, and the morphological changes of soil crusts were observed by scanning electron microscope （ SEM） . The results showed that the control group after leaching for two times, the soil infiltration rate was stable at mmmin1. After adding magnesium oxide to the soil, the soil infiltration rate was significantly decreased to 0. 214 mm min1. When gypsum and magnesium oxide were bined added into soil column, the soil infiltration rate was stable at mmmin1 after leaching for two times, suggesting that the soil infiltration rate increased significantly after gypsum addition pared to that contaminated by magnesium oxide dust. The SEM diagram showed that the soil surface after adding gypsum exhibited a reticular structure and that the porosity and stability of the soil surface were improved, which would increase the permeability of the soil. Keyword:magnesite mining area。 soil
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