羟基磷灰石、粉煤灰对铅(Ⅱ)、镉(Ⅱ)在土壤中迁移的影响  

Effects of hydroxyapatite and fly ash on the migration of Pb(Ⅱ)and Cd(Ⅱ)in soil

作　　者：张海艳[1,2] 董岁明[1,2] 史舒焕 柴丽红[1,2] ZHANG Hai-yan;DONG Sui-ming;SHI Shu-huan;CHAI Li-hong(School of Water and Environment,Chang’an University,Xi’an 710054,China;Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region of the Ministry of Education,Chang’an University,Xi’an 710054,China)

机构地区：[1]长安大学水利与环境学院,陕西西安710054 [2]长安大学、旱区地下水文与生态效应教育部重点实验室,陕西西安710054

出　　处：《应用化工》2023年第3期671-674,681,共5页Applied Chemical Industry

基　　金：国家自然科学基金(42077370)。

摘　　要：土壤中重金属污染严重威胁着动植物和人类的生存环境,迫切需要廉价且高效的材料和方法来减少其流动和迁移。采用土柱实验,探究羟基磷灰石(HAP)和羟基磷灰石与粉煤灰的混合物(HAP+FA)对污染土壤中的铅、镉重金属的稳定效果。结果表明,土壤pH随着HAP和HAP+FA的加入略微升高;渗滤液中重金属的浓度呈现出CK(不加稳定剂)>HAP+FA>HAP;经过稳定剂处理后的土壤中重金属迁移性均低于未经稳定剂处理的,其中初始浓度为400,800 mg/kg铅污染土壤,HAP比HAP+FA的稳定效率分别高出7.5%,2.79%,对于初始浓度为400,800 mg/kg镉污染土壤,HAP比HAP+FA的稳定效率分别高出2.5%和0.51%。HAP对铅和镉的稳定效率均高于HAP+FA,且等量的稳定剂对同等浓度铅的稳定效率更高。The living environment of animals,plans and human beings has been seriously threatened by soil heavy metal pollution,so it’s urgently needed for cheap and efficient materials and methods to reduce their flow and migration.Soil column experiment was conducted to study the stabilization effect of hydroxyapatite(HAP)and the mixture of hydroxyapatite and fly ash(HAP+FA)on lead(Ⅱ)and cadmium(Ⅱ)in contaminated soil.It is indicated that the soil pH increased slightly with the addition of HAP and HAP+FA,and the concentration of heavy metals in the leachate was shown in this order:CK(without stabilizer)>HAP+FA>HAP.The migration of heavy metals in the soil treated with stabilizer was lower than that without stabilizer treatment.The stability efficiency of HAP was 7.5%and 2.79%higher than that of HAP+FA in lead-contaminated soil with initial concentration of 400 mg/kg and 800 mg/kg,respectively,and 2.5%and 0.51%higher than that of HAP+FA for cadmium-comtaminated soil with initial concentration of 400 mg/kg and 800 mg/kg,respectively.The stability efficiency of HAP for lead and cadmium is slightly higher than that of HAP+FA,and there was a better efficiency for the same concentration of lead of the same amount of stabilizer.

关 键 词：羟基磷灰石 粉煤灰 铅 镉 土柱实验 迁移 

分 类 号：TQ423.9[化学工程] X53[环境科学与工程—环境工程]