Sorption and Desorption Characteristics of Ion Exchange Resins to Estimate Leaching Losses in the Field

Sorption and Desorption Characteristics of Ion Exchange Resins to Estimate Leaching Losses in the Field
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离子交换树脂的吸附和解吸特性,用于估算现场浸出损失

DOI:
10.1080/00103624.2012.656169
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发表时间:
2012
影响因子:
1.8
通讯作者:
Buerkert
Buerkert
中科院分区:
农林科学4区
文献类型:
--
作者:
Siegfried;Vazhacharickal;Predotova;Buerkert

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实验室实验进行了离子交换树脂的吸附和解吸性能的基础上回收率。将溶解的硝酸盐(41.6 mM NO3-和166.5 mM NO3-)、铵(63.9 mM NH 4+和256.1 mM NH 4+)、磷酸盐(3.5 mM PO 43-和13.9 mM PO 43-)和钾(16.11 mM K+和63.94 mM K+)工厂化合并,并以5 L的流速在3和9 h加入到交换树脂/砂混合物中。用IM氯化钠(NaCl)进行的六次提取解吸>90%的添加的离子。硝酸盐(NO3-N)的表观回收率平均为99%(±6),铵(NH 4-N)的表观回收率平均为100%(±8),磷酸盐(PO 4-P)的表观回收率平均为109%(±6)。钾(K)的表观回收率错误地偏高(151% ± 12),这在很大程度上反映了电感耦合等离子体(ICP)法的分析干扰问题。溶解离子的浓度不影响任何研究离子的回收率。
Laboratory experiments were conducted to determine sorption and desorption properties of ion exchange resins based on recovery rates. Dissolved nitrate (41.6 mM NO3−and 166.5 mM NO3−), ammonium (63.9 mM NH4+and 256.1 mM NH4+), phosphate (3.5 mM PO43–and 13.9 mM PO43–), and potassium (16.11 mM K+and 63.94 mM K+) were factorially combined and added at flow rates of 5 L at 3 and 9 h to an exchange resin / sand mixture. Six extractions with 1 M sodium chloride (NaCl) desorbed >90% of the added ions. Apparent recovery rates for nitrate (NO3-N) averaged 99% (±6), for ammonium (NH4-N) averaged 100% (±8), and for phosphate (PO4-P) averaged 109% (±6). Apparent recovery rates of potassium (K) were erroneously high (151% ± 12) and largely reflected analytical interference problems with the inductively coupled plasma (ICP) method. Concentrations of dissolved ions did not affect recovery rates of any studied ion.
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