引用本文摘 要：在對白銀市東大溝Pb、Zn、Cd復合污染土壤基本理化性質分析的基礎上，進行了制備免燒磚的初步研究，探討了不同水泥用量對免燒磚抗壓強度和浸出毒性的影響,分析了磚體在不同pH值環境下的安全性，并對固化前后污染土中重金屬形態進行了對比分析。結果表明，水泥對Pb、Zn、Cd具有良好的固化效果。隨著水泥添加量的提高，磚體抗壓強度呈上升趨勢。與原土相比，磚體中重金屬在不同pH值溶液浸提下，浸出趨勢不變，浸出濃度顯著下降，重金屬酸可提取態部分所占比例顯著下降，殘渣態上升。 Abstract: Based on the analysis of the basic physical and chemical properties of Pb, Zn, Cd contaminated soils of Dongdagou in Baiyin, the preparing of non-burned brick was studied. The effect of cement addition on compressive strength and leaching toxicity was discussed. The stability under different pH was analyzed and the distribution of heavy metals in soil before and after solidification was compared. The results showed that the cement has good curing effect on Pb, Zn and Cd. The compressive strength of brick improves as the increasing of cement. Compared with raw contaminated soils, the heavy metal leaching trend in brick in different pH leaching liquor does not change, but the leaching concentration decreases. The acid extractable of heavy metal in brick decreases, residual form increases.
呂浩陽,王喜彬,王愛勤.重金屬復合污染土免燒磚的制備與研究[J].混凝土與水泥制品,2017(4):91-94. LYU H Y, WANG X B, WANG A Q.Preparation and Research on Non-burned Brick Used by Heavy Metal Contaminated Soils[J].China Concrete and Cement Products,2017(4):91-94.