Determination of Total Mass and Morphology Analysis of Heavy Metal in Soil with Potassium Biphthalate-Sodium Hydroxide by ICP-AES
QU Jiao1,2,YUAN Xing1*,CONG Qiao2,WANG Shuang2
1. The School of Urban and Environmental Sciences, Northeast Normal University, Changchun 130024, China 2. Faculty of Chemistry and Chemical Engineering, Bohai University, Jinzhou 121000, China
Abstract：Blank soil was used as quality controlling samples, soil sample dealt by potassium biphthalate-sodium hydroxide buffer solution was used as check sample, mixed acid HNO3-HF-HClO4 was chosen to nitrify soil samples, and plasma emission spectrometer (ICP-AES) was used as detecting method. The authors determined the total metal mass of Mo, Pb, As, Hg, Cr, Cd, Zn, Cu and Ni in the extracted and dealt soil samples, and determined the mass of Mo, Pb, As, Hg, Cr, Cd, Zn, Cu and Ni in the three chemical morphologies, including acid extractable morphology, oxide associated morphology, and organics associated modality. The experimental results indicated that the different pH of potassium biphthalate-sodium hydroxide buffer solution had obvious influence on the total mass of heavy metal and morphology transformation. Except for metal element Pb and Zn, the addition of different pH potassium dihydrogen phosphate-sodium hydroxide buffer solution could accelerate the soil samples nitrification and the total mass determination of heavy metal in the soil samples. The potassium biphthalate-sodium hydroxide buffer solution could facilitate the acid extractable morphology of Cr, Cu, Hg and Pb, oxidation associated morphology of As, Hg, Pb and Zn and the organic associated morphology transforming of As and Hg. At pH 5.8, the maximum acid extractable morphology contents of Cu and Hg were 2.180 and 0.632 mg·kg-1,respectively；at pH 6.2，the maximal oxidation associated morphology content of Pb could achieve 27.792 mg·kg-1；at pH 6.0，the maximum organic associated morphology content of heavy metal Hg was 4.715 mg·kg-1.
曲蛟1,2,袁星1*,丛俏2,王双2. ICP-AES测定邻苯二甲酸氢钾-氢氧化钠作用下土壤中重金属全量及形态分析[J]. 光谱学与光谱分析, 2008, 28(11): 2674-2678.
QU Jiao1,2,YUAN Xing1*,CONG Qiao2,WANG Shuang2. Determination of Total Mass and Morphology Analysis of Heavy Metal in Soil with Potassium Biphthalate-Sodium Hydroxide by ICP-AES . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2008, 28(11): 2674-2678.
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