摘要
用离心-抽滤法对高吸水性树脂 KH841与 NH_4Cl、(NH_2)_2CO、Z_n(NO_3)_2等肥料的关系进行了研究。NH_4Cl、Zn(NO_3)_2降低 KH841树脂的溶胀度,(NH_4)_2CO 对 KH841树脂的溶胀度影响很小;KH841树脂对这些肥料都有一定的吸持作用,并且吸肥量随着肥料浓度的提高而增大。对于NH_4Cl 肥料,高吸水性村脂的保肥作用基于两种原因:一是树脂对肥料液的溶胀"包裹",二是 NH_4^+交换树脂内部的 Na^+。
The relationship between the high water absorbant resin KH841 and the three kinds of fertilizerts NH_4Cl,Zn(NO_3)_2,and urea,was studied using a cen- trifugation and a vacuum filtration method.Both ammonium chloride and zinc nitrate decreased the water retention capacity of the resin,whereas urea had no significant effect.A fraotion of the fertilizers could be retained by the resin.The fertilizer retention capacity of the resin increased with increasing concentrations of the fertilizer solutions.The retention of ammonium ions by the resin was due to(1)retention of ion solution in the pores of the resin,and(ii)dispfacement of sodium ions form the resin polymer by ammonium ions from the fertilizer solution.
关键词
吸水性树脂
肥料
保水
保肥
high water absorbent resin
fertilizer
the water retention capacity
the fertilizer retention capacity
