李晓丽1,
杨肖娥2,
赵凌平1,
张金汉1
1.河南科技大学动物科技学院,洛阳 471003
2.浙江大学环境与资源学院,环境修复与生态健康教育部重点实验室,杭州 310029
基金项目: 国家自然科学基金资助项目(U1504324)
河南科技大学青年科学基金资助项目(2015QN039)
河南科技大学创新培育基金资助项目(4025-13480066)
Degradation and morphological changes of arsanilc acid in soil
HE Wanling1,,LI Xiaoli1,
YANG Xiao′e2,
ZHAO Lingping1,
ZHANG Jinhan1
1.College of Animal Science and Technology, Henan University of Science and Technology, Luoyang 471003,China
2.Key Laboratory of Environmental Remediation and Ecosystem Health, Ministry of Education, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310029,China
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摘要:通过土壤培养实验,研究畜牧养殖过程中阿散酸污染在土壤中的降解规律和形态变化特征。设计阿散酸污染水平为0、30、75、150、225和300 mg·kg-1,分别于培养的2~48 h和5~60 d采集土样,测定其中砷(As)、阿散酸、水溶态As、吸附态As、铁型砷(Fe-As)、铝型砷(Al-As)、钙型砷(Ca-As)、可还原态As和残渣态As。结果表明:阿散酸水平为30~75mg·kg-1时,48 h内降解率为42.99%~71.77%,40 d时降解率100%；阿散酸水平为150~300 mg·kg-1时,降解较慢,降解最快时间段为5~10 d时,但60 d时各组仍有部分阿散酸未被降解；阿散酸污染水平对土壤砷形态的影响表明,随着污染水平增加,对土壤水溶态As和吸附态As影响最大,对Ca-As和残渣态As影响最小。阿散酸污染水平从30~300 mg·kg-1变化时,土壤水溶态As和吸附态As分别增加了4.84~50.29倍和10.43~106.14倍；相反,Ca-As和残渣态As仅增加1.6~1.3倍和1.3~1.62倍；阿散酸污染时间对土壤砷形态的影响表明,污染后10~60 d,随着时间延长,土壤中水溶态As和交换态As呈逐渐下降趋势,而 Ca-As、Fe-As和Al-As含量逐渐增加,残渣态As相对稳定。阿散酸在土壤中降解因污染水平而存在差异,低污染水平降解快,高污染水平降解慢。同时,阿散酸污染能够不同程度改变土壤各种砷形态,并随着污染时间延长,由可利用态逐渐变为稳定态。
关键词: 阿散酸/
土壤/
降解规律/
砷形态
Abstract:By soil incubation experiment, the degradation and morphological changing characteristics of arsanilic acid pollution in the process of animal husbandry will be studied. The design of the level of acid contamination was 0,0,75,0,225,0 mg·kg-1, respectively, in the culture of 2 to 48 h and 5 to 60 d soil samples collected to determine arsenic, acid, soluble As, adsorption state of As, Fe-As, Al-As, Ca-As, reducible state As and residue As. Results show that the arsanilic acid level 30 to 75 mg·kg-1, within 48 h of degradation rate was from 42.99% to 71.77%, the 40 d degradation rate was 100%. Ashanti acid level from 150 to 300 mg·kg-1, the degradation was slow, the fastest degradation time was 5 to 10 d, but there was still a part of arsanilic acid was not degraded in each group within 60 d. The effect of acid pollution level on the arsenic speciation in soil showed that, with the increasing of pollution level, the soil water soluble As and the adsorption state of As were greatly affected, while its effect on the Ca-As and residue As was minimal. Arsanilic acid pollution levels vary from 30 to 300 mg·kg-1, soil water soluble As and adsorbed As increased by 4.84 to 50.29 times and 10.43 to 106.14 times. On the contrary, Ca-As and residual As increased only from 1.6 to 1.3 times and 1.3 to 1.62 times；Arsanilic acid pollution time’s effect on soil arsenic pollution showed that after 10 to 60 d, with the time prolonging, the content of water soluble As and exchangeable As decreased gradually, while Ca-As, Fe-As and Al-As content increased gradually, the residual As is relatively stable.In a word, there are differences in the degradation of acid in soil due to pollution level, the lower the pollution level, the faster the degradation. The higher the pollution level, the slower the degradation. Meanwhile, a variety of arsenic forms in soil could be changed by the acid pollution, and with the extension of the time of pollution, the available state was gradually changed into a stable state.
Key words:arsanilic acid/
soil/
degradation law/
As forms.
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阿散酸在土壤中的降解与形态变化
何万领1,,李晓丽1,
杨肖娥2,
赵凌平1,
张金汉1
1.河南科技大学动物科技学院,洛阳 471003
2.浙江大学环境与资源学院,环境修复与生态健康教育部重点实验室,杭州 310029
基金项目: 国家自然科学基金资助项目(U1504324) 河南科技大学青年科学基金资助项目(2015QN039) 河南科技大学创新培育基金资助项目(4025-13480066)
关键词: 阿散酸/
土壤/
降解规律/
砷形态
摘要:通过土壤培养实验,研究畜牧养殖过程中阿散酸污染在土壤中的降解规律和形态变化特征。设计阿散酸污染水平为0、30、75、150、225和300 mg·kg-1,分别于培养的2~48 h和5~60 d采集土样,测定其中砷(As)、阿散酸、水溶态As、吸附态As、铁型砷(Fe-As)、铝型砷(Al-As)、钙型砷(Ca-As)、可还原态As和残渣态As。结果表明:阿散酸水平为30~75mg·kg-1时,48 h内降解率为42.99%~71.77%,40 d时降解率100%；阿散酸水平为150~300 mg·kg-1时,降解较慢,降解最快时间段为5~10 d时,但60 d时各组仍有部分阿散酸未被降解；阿散酸污染水平对土壤砷形态的影响表明,随着污染水平增加,对土壤水溶态As和吸附态As影响最大,对Ca-As和残渣态As影响最小。阿散酸污染水平从30~300 mg·kg-1变化时,土壤水溶态As和吸附态As分别增加了4.84~50.29倍和10.43~106.14倍；相反,Ca-As和残渣态As仅增加1.6~1.3倍和1.3~1.62倍；阿散酸污染时间对土壤砷形态的影响表明,污染后10~60 d,随着时间延长,土壤中水溶态As和交换态As呈逐渐下降趋势,而 Ca-As、Fe-As和Al-As含量逐渐增加,残渣态As相对稳定。阿散酸在土壤中降解因污染水平而存在差异,低污染水平降解快,高污染水平降解慢。同时,阿散酸污染能够不同程度改变土壤各种砷形态,并随着污染时间延长,由可利用态逐渐变为稳定态。
English Abstract
Degradation and morphological changes of arsanilc acid in soil
HE Wanling1,,LI Xiaoli1,
YANG Xiao′e2,
ZHAO Lingping1,
ZHANG Jinhan1
1.College of Animal Science and Technology, Henan University of Science and Technology, Luoyang 471003,China
2.Key Laboratory of Environmental Remediation and Ecosystem Health, Ministry of Education, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310029,China
Keywords: arsanilic acid/
soil/
degradation law/
As forms
Abstract:By soil incubation experiment, the degradation and morphological changing characteristics of arsanilic acid pollution in the process of animal husbandry will be studied. The design of the level of acid contamination was 0,0,75,0,225,0 mg·kg-1, respectively, in the culture of 2 to 48 h and 5 to 60 d soil samples collected to determine arsenic, acid, soluble As, adsorption state of As, Fe-As, Al-As, Ca-As, reducible state As and residue As. Results show that the arsanilic acid level 30 to 75 mg·kg-1, within 48 h of degradation rate was from 42.99% to 71.77%, the 40 d degradation rate was 100%. Ashanti acid level from 150 to 300 mg·kg-1, the degradation was slow, the fastest degradation time was 5 to 10 d, but there was still a part of arsanilic acid was not degraded in each group within 60 d. The effect of acid pollution level on the arsenic speciation in soil showed that, with the increasing of pollution level, the soil water soluble As and the adsorption state of As were greatly affected, while its effect on the Ca-As and residue As was minimal. Arsanilic acid pollution levels vary from 30 to 300 mg·kg-1, soil water soluble As and adsorbed As increased by 4.84 to 50.29 times and 10.43 to 106.14 times. On the contrary, Ca-As and residual As increased only from 1.6 to 1.3 times and 1.3 to 1.62 times；Arsanilic acid pollution time’s effect on soil arsenic pollution showed that after 10 to 60 d, with the time prolonging, the content of water soluble As and exchangeable As decreased gradually, while Ca-As, Fe-As and Al-As content increased gradually, the residual As is relatively stable.In a word, there are differences in the degradation of acid in soil due to pollution level, the lower the pollution level, the faster the degradation. The higher the pollution level, the slower the degradation. Meanwhile, a variety of arsenic forms in soil could be changed by the acid pollution, and with the extension of the time of pollution, the available state was gradually changed into a stable state.
