Abstract The passivation effects of blast furnace slag, fly ash, corncob biochar, and phosphate fertilizer in Pb-contaminated soil was evaluated against the soil pH, available Pb content, Pb fractions, and bioactivity coefficient. Blast furnace slag and fly ash could increase soil pH, while corncob biochar and phosphate fertilizers lowered soil pH. The available Pb content in the blast furnace slag and phosphate fertilizer treatment groups was significantly lower than in other treatments. Also, blast furnace slag and phosphate fertilizer could significantly convert nonresidual Pb into residual Pb. Combined with the environmental impact after application and cost of the material, it is recommended that blast furnace slag can be used as a passivation agent for low-concentration Pb-contaminated soil.

中文翻译：

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钝化材料对铅污染土壤修复效果研究

摘要 评价了高炉矿渣、粉煤灰、玉米芯生物炭和磷肥对铅污染土壤的钝化作用，并根据土壤 pH 值、有效铅含量、铅组分和生物活性系数进行了评价。高炉矿渣和粉煤灰会增加土壤 pH 值，而玉米芯生物炭和磷肥会降低土壤 pH 值。高炉渣和磷肥处理组有效铅含量显着低于其他处理组。此外，高炉矿渣和磷肥可以显着将非残留铅转化为残留铅。结合应用后的环境影响和材料成本，建议高炉矿渣可作为低浓度铅污染土壤的钝化剂。