Zewail University, Zewail City of Science and Technology, 6th October City, 12588 Giza, Egypt.
Carbohydr Polym. 2013 Jul 25;96(2):450-9. doi: 10.1016/j.carbpol.2013.04.021. Epub 2013 Apr 17.
In the present study, various grades of sodium alginates were extracted from different brown macro-algae and their characteristics were investigated using FTIR, UV-vis and EA. The alginates were used in combination with different proportions of calcareous soil to develop new composite microparticles as potential sorbents for efficient uptake of Fe(III), Mn(II) and As(V) from water. Under the investigated conditions (1g of composite equilibrated in 100ml of standard metal ion solution), the composites have removed almost 100% of Fe(III) in the concentration range of 0.5-16.0 mg l(-1). Soil, alginate and composites exhibited the highest removal (about 89%) of Mn(II) at 0.5 mg l(-1). Reasonable removal efficiency (50-60%) was recorded at 0.5 mg l(-1) of As(V) whereas, increasing the initial As(V) concentration resulted in marked decrease in removal efficiency. The collected equilibrium data were also fitted to both Langmuir and Freundlich isotherms for all the developed composites.
在本研究中，从不同的褐藻中提取了不同等级的海藻酸钠，并通过傅里叶变换红外光谱（FTIR）、紫外可见光谱（UV-vis）和元素分析（EA）对其特性进行了研究。将海藻酸钠与不同比例的钙质土结合，开发了新型复合微球，作为从水中有效去除 Fe(III)、Mn(II)和 As(V)的潜在吸附剂。在所研究的条件下（1g 复合材料在 100ml 标准金属离子溶液中平衡），该复合材料在 0.5-16.0mg l(-1)的浓度范围内去除了几乎 100%的 Fe(III)。在 0.5mg l(-1)时，土壤、海藻酸钠和复合材料对 Mn(II)的去除率最高（约 89%）。在 0.5mg l(-1)的 As(V)浓度下，记录到了合理的去除效率（50-60%），而随着初始 As(V)浓度的增加，去除效率显著下降。收集的平衡数据也根据所有开发的复合材料同时拟合了朗缪尔和弗伦德利希等温线。
