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当前位置: 首页 > 文章 > Reduction of arsenic bioavailability by amending seven inorganic materials in arsenic contaminated soil 农业科学学报 (英文) 2015,14 (7)
Position: Home > Articles > Reduction of arsenic bioavailability by amending seven inorganic materials in arsenic contaminated soil Journal of Integrative Agriculture 2015,14 (7)

Reduction of arsenic bioavailability by amending seven inorganic materials in arsenic contaminated soil

作  者：
Sun Yuan-yuan;Liu Rong-le;Zeng Xi-bai;Lin Qi-mei;Bai Ling-yu;Li Lian-fang;Su Shi-ming;Wang Ya-nan
单  位：
Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, Key Lab Agroenvironm, Minist Agr, Beijing 100081, Peoples R China;China Agr Univ, Coll Resources & Environm Sci, Beijing 100193, Peoples R China;Chinese Acad Agr Sci, Grad Sch, Beijing 100081, Peoples R China
关键词：
arsenic;amendment;bioavailability;Brassia campestris L.
摘  要：
Seven inorganic amendment materials were added into arsenic (As) contaminated soil at a rate of 0.5% (w/w); the materials used were sepiolite, red mud, iron grit, phosphogypsunn, ferrihydrite, iron phosphate, and layered double oxides (LDO). Plant growth trials using rape (edible rape, Brassia campestris L.) as a bio-indicator are commonly used to assess As bio-availability in soils. In this study, B. campestris was grown in a contaminated soil for 50 days. All of the inorganic amendments significantly inhibited the uptake of As by B. campestris. Following soil treatment with the seven aforementioned inorganic ammendments, the As concentrations in the edible parts of B. campestris were reduced by 28.6, 10.5, 8.7, 31.0, 47.4, 25.3, and 28.8%, respectively, as compared with the plants grown in control soil. The most effective amendment was ferrihydrite, which reduced As concentration in B. campestris from 1.84 to 0.97 mg kg(-1), compared to control. Furthermore, ferrihydrite-treated soils had a remarkable decrease in both non-specifically sorbed As and available-As by 67 and 20%, respectively, comparing to control. Phosphogypsum was the most cost-effective amendment and it showed excellent performance in reducing the water soluble As in soils by 31% and inhibiting As uptake in B. campestris by 21% comparing to control. Additionally, obvious differences in As transfer rates were observed in the various amendments. The seven amendment materials used in this study all showed potential reduction of As bioavailability and influence on plant growth and other biological processes still need to be further explored in the long term.
作  者：
SUN Yuan-yuan;LIU Rong-le;ZENG Xi-bai;LIN Qi-mei;BAI Ling-yu;LI Lian-fang;SU Shi-ming;WANG Ya-nan;Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Environment,Ministry of Agriculture;College of Resources and Environmental Sciences, China Agricultural University;Graduate School of Chinese Academy of Agricultural Sciences;
关键词：
arsenic,amendment,bioavailability,Brassia campestris L.
摘  要：
Seven inorganic amendment materials were added into arsenic(As) contaminated soil at a rate of 0.5%(w/w); the materials used were sepiolite, red mud, iron grit, phosphogypsum, ferrihydrite, iron phosphate, and layered double oxides(LDO). Plant growth trials using rape(edible rape, Brassia campestris L.) as a bio-indicator are commonly used to assess As bioavailability in soils. In this study, B. campestris was grown in a contaminated soil for 50 days. All of the inorganic amendments significantly inhibited the uptake of As by B. campestris. Following soil treatment with the seven aforementioned inorganic ammendments, the As concentrations in the edible parts of B. campestris were reduced by 28.6, 10.5, 8.7, 31.0, 47.4, 25.3, and 28.8%, respectively, as compared with the plants grown in control soil. The most effective amendment was ferrihydrite, which reduced As concentration in B. campestris from 1.84 to 0.97 mg kg–1, compared to control. Furthermore, ferrihydrite-treated soils had a remarkable decrease in both non-specifically sorbed As and available-As by 67 and 20%, respectively, comparing to control. Phosphogypsum was the most cost-effective amendment and it showed excellent performance in reducing the water soluble As in soils by 31% and inhibiting As uptake in B. campestris by 21% comparing to control. Additionally, obvious differences in As transfer rates were observed in the various amendments. The seven amendment materials used in this study all showed potential reduction of As bioavailability and influence on plant growth and other biological processes still need to be further explored in the long term.

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