Se(IV)在北山花岗岩上的吸附

Se(IV)在北山花岗岩上的吸附
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DOI:
10.3866/pku.whxb20110918
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发表时间:
2011-08
期刊:
Acta Physico - Chimica Sinica
影响因子:
--
通讯作者:
黎春
黎春
中科院分区:
其他
文献类型:
--
作者:
郭治军;陈宗元;吴王锁;刘春立;陈涛;田文宇;黎春

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采用静态吸附法研究了北山花岗岩(BS 03,600 m)对Se(IV)的吸附行为。结果表明,在pH 3-7范围内,分配系数K(d)基本保持不变,pH>7时,分配系数K(d)降低。Se(IV)的吸附不随离子强度而变化。Ca(2+)(4.10 × 10(-3)mol . L(-1))和SO(4)(2-)(3.17 × 10(-3)mol . L(-1))对Se(IV)的吸附没有影响。此外,我们发现Se(IV)(1.46x10(-5)mol . L(-1))和Eu(III)(3.33 × 10(-6)mol .在Se(IV)/Eu(III)/花岗岩的三元吸附体系中,L(-1)对北山花岗岩的吸附没有影响。通过考虑HseO(3)(-)在SOH一般吸附位上形成SHSeO(3)和SSeO(3)(-)的两种表面络合反应,定量解释了Se(IV)在北山花岗岩上的吸附。
The adsorption of Se(IV) onto crushed Beishan granite (BS03, 600 m) was studied by a batch experimental method. The results showed that the distribution coefficient (K(d)) remained almost constant in the pH range of 3-7 and decreased at pH>7. The adsorption of Se(IV) did not vary with ionic strength. The presence of Ca(2+) (4.10x10(-3) mol . L(-1)) and SO(4)(2-)(3.17x10(-3) mol . L(-1)) had no effect on Se(IV) adsorption. Moreover, we found that the adsorption of Se(IV) (1.46x10(-5) mol . L(-1)) and Eu(III) (3.33x10(-6) mol . L(-1)) on Beishan granite had no effect on each other in the ternary adsorption system consisting of Se(IV)/Eu(III)/granite. The adsorption of Se(IV) onto Beishan granite was quantitatively interpreted by considering the two surface complexation reactions of HseO(3)(-) to form SHSeO(3) and SSeO(3)(-) on the SOH general adsorption sites.
DOI: 10.1524/ract.2002.90.9-11_2002.805
发表时间: 2002-01-01
期刊: RADIOCHIMICA ACTA
影响因子: 1.8
作者:
Hummel, W;Berner, U;Thoenen, T
通讯作者: Thoenen, T