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Guogen Xie¹, Ziran Zong², Shunxin Song²

¹School of Mathematics and Computer, Tongling University, Tongling, Anhui 244061, China.

|May 12, 2025

概括

在中国,丰富土壤中的重金属 (HMs) 超过了安全值. 地化学分析确定了基岩气候变化,煤炭燃烧和交通作为关键的HM来源,为土壤管理策略提供了信息.

科学领域:

环境地质化学环境地质化学
土壤科学土壤科学
地化学勘探地质化学勘探

背景情况:

在中国安省南部的 (Se) 丰富土壤中,重金属 (HM) 地化学背景呈高.
了解这些土壤中的HM丰富特性和来源对于环境管理至关重要.

研究的目的:

调查Se丰富土壤中八种HM (As,Cd,Cr,Cu,Mo,Pb,Zn,Ni) 的丰富特性和来源.
评估HM度与区域背景值和风险选值相对应.

主要方法:

对土壤和底层岩石进行全面的地化学分析.
序列提取分析以确定HM的生物利用性.
(Pb) 同位素追踪以确定Pb来源.
积极矩阵因子化 (PMF) 建模用于识别HM源.

主要成果:

富含Se的土壤中的HM度往往超过区域背景值,其中As,Cd和Mo超过了风险选值.
As,Pb和Cr主要存在于残留分数中,而Cd显示出高生物可用性 (可交换和碳酸盐分数).
的来源包括基岩气候变化,煤炭燃烧和车辆排气.
PMF确定了四个主要的HM来源:采矿/炼/煤炭燃烧,岩底气候变化,Mo丰富的矿石浸,以及交通/农业投入.

结论:

南安的富含海的土壤存在显著的HM污染风险,特别是As,Cd和Mo.
不同的HM物种表示不同的移动性和生物可用性.
多种人为和自然来源有助于HM丰富,需要用于土壤利用和安全的综合管理战略.

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