Lewatit®FO 36是一种大孔单分散聚苯乙烯基树脂，用于选择性吸附氧化阴离子，如砷酸盐或亚砷酸盐离子。它是一种弱碱性离子交换树脂，其掺杂有覆盖聚合物珠粒孔内表面的氧化铁的纳米级膜。含氧阴离子通过涉及氧化铁表面上的氢氧根的特定的可逆反应结合。其他阴离子如S042-，NO3-，Cl-，HCO3-对砷的吸附具有可忽略的影响。操作的好佳pH值为6.Lewatit®FO 36特别适用于以下应用：安全地从饮用水中除去砷（As），低于每升10微克从地下水中除去砷，并从废水中去除砷过程解决方案，甚至在存在高浓度的中性盐（例如> 10％NaCl和Na 2 SO 4）的情况下从地下水，饮用水和废水（例如原磷酸盐，多磷酸盐）中去除磷酸盐除了含砷的含氧阴离子如砷酸盐和亚砷酸盐之外Lewatit FO 36能够选择性地吸附HP042-，HS103-，HSb042-，HVO42-，SCN-等其他物质。还必须考虑到树脂中的弱碱性阴离子交换基团仍然是活性的，并且可以在基本上以这种功能组而闻名的具体方式。因此，Lewatit®FO 36还可以与天然有机物如单宁，木质素，带负电荷的铀络合物，铬酸盐等结合。聚合物树脂基铁氧化物掺杂吸附剂与标准无机吸附剂相比的优势nts是：完全可再生性（可根据要求提供再生和调理的技术推荐）高操作能力无细铁氧化物颗粒渗出高机械强度，可轻松反洗或泵入悬浮液由于形成大的细小动力学，不会堵塞树脂床表面积和优化的孔结构可水的认证证书符合特定国家的要求，并可根据制造商的声明提供。如果Lewatit®FO 36用于饮用水处理，则必须采用特殊的启动程序。此信息可应要求提供。

Lewatit® FO 36 is a macroporous, monodisperse, polystyrene-based resin for the selective adsorption of oxoanions, such as arsenate or arsenite ions. lt is a weakly basic ion exchange resin which is doped with a nano-scaled film of iron oxide covering the inner surfaces of the pores of the polymer bead. Oxoanions are bound by a specific, reversible reaction involving hydroxide groups on the iron oxide surface. Other anions such as S0₄^2-, NO₃^-, Cl-, HCO₃^- have a neglectable influence on arsenic adsorption. The best pH for operation is pH = 6.

Lewatit® FO 36 is especially suitable for use in the following applications:

• removal of arsenic (As) from potable water safely below 10 micrograms per liter

• removal of arsenic from ground water and waste water

• removal of arsenic from process solutions, even in presence of high concentrations of neutral salts (e.g. > 10% NaCI and Na₂SO₄)

• removal of phosphate from ground water, potable water and waste water (e.g. ortho-phosphate, polyphosphate)

  
  

  Besides of arsenic containing oxoanions such as arsenate and arsenite Lewatit® FO 36 is capable of selectively adsorbing other species like HP0₄^2-, HS10₃^-, HSb0₄^2-, HVO₄^2-, SCN- etc. Also it has to be considered that the weakly basic anion exchange group in the resin is still active and can react in the specific way basically known for this kind of functional group. Hence Lewatit® FO 36 can also bind natural organic matter such as tannins, lignins, negatively charged uranium complexes, chromate and others.

  
  

  Advantages of polymer resin based ironoxide doped adsorbers compared to standard inorganic adsorbents are:

• full regenerability (technical recommendation for regeneration and conditioning available upon request)

• high operating capacity

• no bleeding of fine iron oxide particles

• high mechanical strength, enabling easy backwash or pump in suspension

• no blocking of the resin bed due to build up of fines

• fast kinetics due to large surface area and optimized pore structure

  
  

  Potable water approval certifications are country specific and available as manufacturer's declaration upon request.

  
  

  In case Lewatit® FO 36 is used for potable water treatment a special start-up procedure has to be applied. This information is available upon request.

  应用

  金属工业;饮用水处理;去除;饮用水软化;水处理;

  Metal industry

  Potable water treatment

  Removal

  Softening of potable water

  Water Treatment

  Synonyms

  Lewatit FO 36