KINETICS OF PHOSPHATE ADSORPTION BY IRON OXYHYDROXIDES IN AQUEOUS SYSTEMS
KINETICS OF PHOSPHATE ADSORPTION BY IRON OXYHYDROXIDES IN AQUEOUS SYSTEMS
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DOI：
10.1016/0272-7714(84)90069-6
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发表时间：
1984-01-01
影响因子：
2.8
通讯作者：
WHITFIELD, M
中科院分区：
文献类型：
--
作者：
CROSBY, SA;MILLWARD, GE;WHITFIELD, M
在类似于天然水中的反应条件下，研究了合成Fe(III)和Fe(II)衍生氢氧化物对磷酸盐的吸收速率。对吸附曲线进行了动力学分析，得到了一级和二级条件速率常数。研究了部分速率常数与温度的关系，并计算了相应的表观活化能。利用天然来源的铁进行了类似的实验和分析，总的来说，在海水中得到的条件速率常数与合成的速度常数是一致的。这一研究结果对于比较天然水体中吸附过程的时间尺度与混合和平流的时间尺度是有价值的。
The rate of uptake of phosphate onto synthetic Fe(III) and Fe(II) derived oxyhydroxides was studied using reaction conditions similar to those encountered in natural waters. Kinetic analyses were carried out on the adsorption profiles and both 1st-order and 2nd-order conditional rate constants were obtained. The temperature dependence of some of the rate constants was investigated and corresponding apparent activation energies calculated. Similar experiments and analyses were undertaken using Fe from natural sources and in general the conditional rate constants obtained in seawater were in agreement with the synthetic ones. The results of this study are of value when comparing the time scales of adsorption processes in natural waters with the time scales of mixing and advection.