Abstract

The presence of arsenic in groundwater, eventually in drinking water, has been recognized as a serious community health problem due to its highly toxic nature, and therefore, its removal is highly essential. To enhance the adsorption capacity of chitosan for As (V), chitosan which is a natural biopolymer was modified by grafting with 2-Hydroxyethylmethacrylate (HEMA) and Sodium Styrene Sulfonate (SSS). Modified chitosan was characterized by SEM and FTIR spectroscopy. Maximum Removal percentage of As (V) was found to be higher (95%) at inlet concentration of As (V) 60 mg/L, flow rate 1 ml/min, pH 3.5, and bed depth 3 cm. The bed depth service time model and Thomas model are used to analyze the column data in terms of As (V) uptake rate and column capacities. Developed grafted adsorbent could be successfully regenerated using 0.1 M NaOH. Recycle studies suggested that maximum reusability of grafted polymer up to 8 cycles.

摘要

地下水中的砷，最终是饮用水中的砷，由于其剧毒性质而被认为是严重的社区健康问题，因此，去除砷至关重要。为了提高壳聚糖对砷（V）的吸附能力，通过与甲基丙烯酸2-羟乙酯（HEMA）和苯乙烯磺酸钠（SSS ）接枝来改性天然生物聚合物壳聚糖。改性壳聚糖通过SEM和FTIR光谱表征。发现在砷（V）的入口浓度60 mg / L，流速1 ml / min，pH 3.5和床深3 cm时，砷（V）的最大去除率更高（95％）。床层深度服务时间模型和Thomas模型用于根据As（V）吸收率和色谱柱容量分析色谱柱数据。使用0.1 M NaOH可以成功再生已开发的接枝吸附剂。循环研究表明，接枝聚合物的最大可重复使用性可达8个循环。