广西北部湾地区表层土壤As分布特征及其影响因素

doi:10.13278/j.cnki.jjuese.20160080

吉林大学学报(地球科学版) ›› 2018, Vol. 48 ›› Issue (1): 181-192.doi: 10.13278/j.cnki.jjuese.20160080

广西北部湾地区表层土壤As分布特征及其影响因素

郑国东¹, 覃建勋¹, 付伟², 杨志强¹, 赵辛金¹, 卢炳科¹

1. 广西地质调查院, 南宁 530023;
2. 桂林理工大学地球科学学院, 广西桂林 541004

收稿日期:2016-11-21 出版日期:2018-01-26 发布日期:2018-01-26
通讯作者: 杨志强(1963),男,教授级高级工程师,主要从事勘查地球化学方面的研究,E-mail:zyyangzq@163.com E-mail:zyyangzq@163.com
作者简介:郑国东(1983),男,硕士研究生,工程师,主要从事环境地球化学方面的研究,E-mail:156001601@qq.com
基金资助:
国家自然科学基金项目（41462005）；中国地质调查局国家专项（GZTR20060115，GZTR20070107，GZTR20080110）；广西自然科学基金项目（2014GXNSFAA118304）

Influencing Factors on Distribution and Accumulation of Arsenic in Topsoil in Beibu Gulf of Guangxi

Zheng Guodong¹, Qin Jianxun¹, Fu Wei², Yang Zhiqiang¹, Zhao Xinjin¹, Lu Bingke¹

1. Guangxi Institute of Geological Survey, Nanning 530023, China;
2. College of Earth Sciences, Guilin University of Technology, Guilin 541004, Guangxi, China

Received:2016-11-21 Online:2018-01-26 Published:2018-01-26
Supported by:
Supported by National Natural Science Foundation of China (41462005),National Special Project of China Geological Survey (GZTR20060115, GZTR20070107, GZTR20080110) and Natural Science Foundation of Guangxi Province (2014GXNSFAA118304)

摘要/Abstract

摘要： 选取广西北部湾地区表层土壤中As元素为研究对象，采集了7 327个土壤样品，400个岩石样品，分析As、K₂O、Na₂O、CaO、MgO、SiO₂、Al₂O₃、TFe₂O₃、Mn、Ti、pH和有机碳（SOC）等指标，探讨了土壤成土母岩、成土作用、土壤组成、pH和有机质等对表层土壤As元素的影响。结果表明：As元素平均质量分数为7.96×10^-6，为中国土壤背景值0.80倍；风化作用对于As元素的次生富集起到极为重要的作用，明显强于成土母岩As元素背景的影响。Pearson相关分析和主成分分析表明：在土壤组成和土壤性质等因素中，含Al矿物（Al₂O₃）、含Fe矿物（TFe₂O₃）、含Si矿物（SiO₂）和SOC，对土壤As的富集起到主导作用；pH 和含 Ca矿物（CaO）的作用较弱；而含K矿物（K₂O）、含Na矿物（Na₂O）和含Mg矿物（MgO）对As的次生富集作用可以忽略不计。

关键词: As, 分布特征, 影响因素, 北部湾, 表层土壤

Abstract: A total of 7 327 topsoil and 400 rock samples were collected in Beibu Gulf of Guangxi, and the concentration of the arsenic (As) and other elements or soil properties, such as K₂O, Na₂O, CaO, MgO, SiO₂, Al₂O₃, TFe₂O₃, Mn, Ti, soil organic matter (SOC) and pH, were analyzed to discuss the relationship between the As and parent rock, weathering process, main elements, and soil properties. Moreover, we attempted to delineate the primary and secondary relationships between these factors. The results of this study show that the concentration of As is 7.96×10^-6, lower than the background value of China soil. Weathering play a role in As accumulation more important than parent rocks. The results of Pearson and principal analyses indicate that Al-bearing, Fe-bearing minerals and SOC play a primary role in As accumulation, the influence of pH and Ca-bearing mineral is weak, and the role of K-bearing, Na-bearing and Mg-bearing minerals in As accumulation is negligible.

Key words: arsenic, distribution, influence factors, Beibu Gulf, topsoil

中图分类号:

郑国东, 覃建勋, 付伟, 杨志强, 赵辛金, 卢炳科. 广西北部湾地区表层土壤As分布特征及其影响因素[J]. 吉林大学学报(地球科学版), 2018, 48(1): 181-192.

Zheng Guodong, Qin Jianxun, Fu Wei, Yang Zhiqiang, Zhao Xinjin, Lu Bingke. Influencing Factors on Distribution and Accumulation of Arsenic in Topsoil in Beibu Gulf of Guangxi[J]. Journal of Jilin University(Earth Science Edition), 2018, 48(1): 181-192.

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广西北部湾地区表层土壤As分布特征及其影响因素

Influencing Factors on Distribution and Accumulation of Arsenic in Topsoil in Beibu Gulf of Guangxi

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