Chrysoidine is a type of industrial azo dye and a well-known toxicant. Due to its good dyeing characteristics, it is widely used for dyeing leather, paper, feather, grass, wood, bamboo, etc. Hence, it is very important to remove or reduce its concentration below the contamination level in the waste line by using low-cost technologies. Sawdust is a plentiful material available very cheaply from sawmills and woodworks. Therefore, the present work was conducted to study sorption ability of both raw sawdust and chemically activated sawdust carbon on the removal of chrysoidine from the aqueous solutions. Adsorption isotherms of the dye on sawdust were determined and correlated with usual isotherm equations like Freundlich and Langmuir. Experimental results have shown that sawdust has a high adsorption efficiency, and the adsorption of chrysoidine followed Freundlich’s isotherm. Although raw sawdust proved to be slightly less efficient in comparison to chemically treated sawdust but in economic terms, raw sawdust is more cost-effective as the difference in the percent dye removal is less than the difference in the manufacturing costs. The influence of several parameters such as effect of temperature, adsorbent dose, adsorption time, etc., on the adsorption process was studied along with thermodynamic parameters such as enthalpy (ΔH^°) and entropy (ΔS^°).

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活性木屑从水溶液中吸附纺织品染料（克尿嘧啶）的研究

克尿苷是一种工业偶氮染料，是一种众所周知的有毒物质。由于其良好的染色特性，它被广泛用于皮革，纸张，羽毛，草，木材，竹子等的染色。因此，通过使用低浓度的废水来去除或降低其浓度至废物线以下的污染水平非常重要。成本的技术。锯末是从锯木厂和木材厂很便宜地获得的大量材料。因此，进行了本工作以研究原始锯末和化学活化的锯末碳在从水溶液中除去菊苣苷时的吸附能力。确定了染料在木屑上的吸附等温线，并与常用的等温线方程式（如Freundlich和Langmuir）相关联。实验结果表明，木屑具有很高的吸附效率，菊苣苷的吸附遵循Freundlich等温线。尽管与化学处理过的木屑相比，原始木屑的效率略低，但从经济角度来看，由于去除染料百分比的差异小于制造成本的差异，因此原始木屑更具成本效益。研究了温度，吸附剂量，吸附时间等几个参数对吸附过程的影响，以及焓（Δ）等热力学参数。H ^°）和熵（ΔS ^°）。