文章摘要
刘奕廷,田楚琪,苏燕,王坚,欧成浩,管秀静,党秀丽.羟基磷灰石稳定场地土壤镉和铅的效果及影响因素分析[J].农业环境科学学报,2025,44(10):2598-2604.
羟基磷灰石稳定场地土壤镉和铅的效果及影响因素分析
Analysis of the effect and influencing factors of hydroxyapatite on stabilizing soil cadmium and lead in site
投稿时间:2024-12-13  
DOI:10.11654/jaes.2024-1094
中文关键词:     稳定化修复  羟基磷灰石  浸出浓度  场地土壤
英文关键词: Cd  Pb  stabilization repair  hydroxyapatite  leaching concentration  site soil
基金项目:国家重点研发计划项目(2020YFC1806400,2017YFD0801103)
作者单位E-mail
刘奕廷 沈阳农业大学土地与环境学院, 土肥高效利用国家工程研究中心, 农业农村部东北耕地保育重点实验室, 沈阳 110866  
田楚琪 沈阳农业大学土地与环境学院, 土肥高效利用国家工程研究中心, 农业农村部东北耕地保育重点实验室, 沈阳 110866  
苏燕 沈阳环境科学研究院, 沈阳 110167  
王坚 沈阳环境科学研究院, 沈阳 110167  
欧成浩 沈阳农业大学土地与环境学院, 土肥高效利用国家工程研究中心, 农业农村部东北耕地保育重点实验室, 沈阳 110866  
管秀静 沈阳农业大学土地与环境学院, 土肥高效利用国家工程研究中心, 农业农村部东北耕地保育重点实验室, 沈阳 110866  
党秀丽 沈阳农业大学土地与环境学院, 土肥高效利用国家工程研究中心, 农业农村部东北耕地保育重点实验室, 沈阳 110866 dxl@syau.edu.cn 
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中文摘要:
      为评估不同环境条件对场地土壤镉(Cd)、铅(Pb)稳定化效果的影响,通过室内培养试验,采用不同剂量的羟基磷灰石(1%、2%、4%、8%)修复辽宁省某冶炼厂Cd-Pb污染场地土壤,测定土壤中Cd、Pb浸出毒性及赋存形态,以筛选稳定化效果最佳的羟基磷灰石添加量。然后采用不同pH(2.0、4.0、5.5、7.0、8.0、9.0、10.5、12.0、13.0)和不同液固比(1∶1、2∶1、5∶1、10∶1和20∶1)浸提稳定化后的土壤,测定Cd、Pb浸出浓度,以研究不同环境条件下羟基磷灰石对Cd、Pb稳定化效果的影响。结果表明:与未加羟基磷灰石相比,添加处理可使土壤中Cd浸出浓度降低19.9%~64.4%(P<0.05),Pb浸出浓度降低36.0%~98.0%(P<0.05),羟基磷灰石对Cd、Pb的稳定化效果表现为Cd12.0)浸提相比,中性条件(pH为 5.5~10.5)下 Cd、Pb浸出浓度较低,分别为 0.003~0.293 mg·L-1和 0.003~0.041 mg·L-1。与较高液固比(5∶1、10∶1和20∶1)相比,较低液固比(1∶1、2∶1)增加了Cd、Pb的浸出浓度,其中液固比为5∶1时Cd、Pb的浸出浓度最低。研究表明,羟基磷灰石可有效改变场地土壤中Cd、Pb的赋存形态,进而降低Cd、Pb的浸出浓度,强酸强碱和较低液固比浸提有增大稳定化后土壤中Cd、Pb再溶出的风险。
英文摘要:
      To evaluate the effects of various environmental conditions on the stabilization of cadmium(Cd)and lead(Pb)in soil of development land in Liaoning Province, indoor cultivation experiments were conducted using different doses of hydroxyapatite(1%, 2%, 4%, 8%)to remediate Cd-Pb contaminated soil. The leaching toxicity and occurrence forms of Cd and Pb in the soil were determined to screen for the optimal amount of hydroxyapatite for stabilization. Then, stabilized soil was leached using different pH values(2.0, 4.0, 5.5, 7.0, 8.0, 9.0, 10.5, 12.0, 13.0)and liquid-solid ratios(1∶1, 2∶1, 5∶1, 10∶1, and 20∶1), and the leaching concentrations of Cd and Pb in the soil were determined to study the effect of hydroxyapatite on the stabilization of Cd and Pb under different environmental conditions. The results showed that compared with the treatment without hydroxyapatite, adding hydroxyapatite could reduce the leaching concentration of Cd in soil by 19.9%-64.4%(P<0.05), and the leaching concentration of Pb by 36.0%-98.0%(P<0.05). The stabilization effect of hydroxyapatite on Cd and Pb showed that Cd12.0)leaching, under neutral conditions(pH 5.5-10.5), the leaching concentrations of Cd and Pb are lower, ranging from 0.003-0.293 mg·L-1 and 0.003-0.041 mg·L-1, respectively. Compared with higher liquid-solid ratio(5∶1, 10∶1, and 20∶1), lower liquid-solid ratio(1∶1, 2∶1)increased the leaching concentrations of Cd and Pb. The leaching concentration of Cd and Pb was the lowest when the liquid-solid ratio was 5∶1. Research has shown that hydroxyapatite can effectively alter the occurrence forms of Cd and Pb in soil of site, thereby reducing the leaching concentration of Cd and Pb. Strong acid, strong alkali, and low liquid-solid ratio leaching increase the risk of Cd and Pb releaching from stabilized soil.
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