干旱区生态环境知识资源中心(Arid): 广西典型高砷背景地区石漠化土壤中砷形态及相关因子研究

Arid

	广西典型高砷背景地区石漠化土壤中砷形态及相关因子研究
其他题名	The Characteristics of Arsenic Speciation and Factors Analysis in the Soils of Rocky Desertification in the Typical High-Arsenic-Background Region in Guangxi
	雷亚超 1; 张学洪 2; 叶丽丽 2; 袁贤斌 1; 蒋金平 2
来源期刊	生态环境学报
ISSN	1674-5906
出版年	2017
卷号	26 期号:2 页码:335-341
中文摘要	广西的喀斯特地貌分布广泛,部分石漠化地区的土壤砷污染问题比较突出。为深入了解广西重金属高背景地区石漠化土壤中砷的变化特征及其影响因素,采集广西环江县地质背景相似的不同石漠化程度(无石漠化、轻度石漠化、中度石漠化、重度石漠化)的表层土样,分析土壤样品中砷含量及形态,并采用多元线性回归模型分析石漠化土壤中砷形态的主要影响因子。结果表明,随着石漠化程度的加剧,表层土壤中砷含量呈现出逐渐增加的趋势,但是在重度石漠化土壤中砷含量有所下降。石漠化土壤样品中砷含量较高的区域分布在轻度和中度石漠化的中坡和下坡。石漠化土壤中砷形态主要以残渣态为主,其次是可氧化态和可还原态,最低的是水溶态;砷的水溶态、可氧化态、可还原态在土壤中的含量随着石漠化程度的加剧呈现出逐渐减少的趋势。多元回归分析表明阳离子交换量是影响水溶态砷和可氧化态砷的主要因子,pH值是影响弱酸提取态砷和可还原态砷的主要因子,呈极显著正相关(P<0.01),总砷含量与残渣态砷呈显著正相关(P<0.05)。
英文摘要	The karst landform widely distributes in Guangxi with abundant development patterns. The ecosystem in this areas is very fragile and it is easy to be destroyed and forms karst rocky desertification. The problem of heavy metals pollution is very prominent because of high values of environmental background in these areas, especially for arsenic. It also has negative impact on the production and life of the surrounding residents. In order to reveal the variation of arsenic and its influence factors in rocky desertification soils with high-heavy metal-background in Guangxi, we investigated the top soils with similar geological background in different rocky desertification grades (no rocky desertification as control, slight rocky desertification, moderate rocky desertification, intense rocky desertification) to determined the concentration and speciation of arsenic. Multi-statistics regression analysis was used to quantify the main factors influencing the arsenic speciation in rocky desertification soil. The results indicated that the content of arsenic was gradually increasing in the top soil with the aggravation of rocky desertification, but the content of arsenic in intense rocky desertification was decreased. The content of arsenic was higher in mesoslope and downslope of hills with MRD and IRD. The speciation of As in different rocky desertification soils was mainly dominated by the residual As, followed by the oxidation and the reduction As, and the lowest was water soluble. The water soluble, oxidation and reduction As showed an decreasing trend in the top soil with the aggravation of rocky desertification. Multiple regression analysis showed that the cation exchange capacity was the main influencing factor of the water soluble state and the oxidation state of As content. pH values were the important factor for weak acid extractable and reducible As content, which had extremely significant positive correlation (P<0.01). The total arsenic content had significant positive correlation with the residual As (P<0.05).
中文关键词	重金属高背景 ; 石漠化 ; 砷形态 ; 影响因子
英文关键词	high-heavy metal-background region rocky desertification arsenic speciation influence factors
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ENVIRONMENTAL SCIENCES
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:5978270
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/236397
作者单位	1.桂林理工大学, 广西环境污染控制理论与技术重点实验室, 桂林, 广西 541004, 中国; 2.桂林理工大学, 广西环境污染控制理论与技术重点实验室;;西岩溶地区水污染控制与用水安全保障协同创新中心, 桂林, 广西 541004, 中国
推荐引用方式 GB/T 7714	雷亚超,张学洪,叶丽丽,等. 广西典型高砷背景地区石漠化土壤中砷形态及相关因子研究[J],2017,26(2):335-341.
APA	雷亚超,张学洪,叶丽丽,袁贤斌,&蒋金平.(2017).广西典型高砷背景地区石漠化土壤中砷形态及相关因子研究.生态环境学报,26(2),335-341.
MLA	雷亚超,et al."广西典型高砷背景地区石漠化土壤中砷形态及相关因子研究".生态环境学报 26.2(2017):335-341.