Girish C R, Ramachandramurty V
J Environ Sci Eng. 2013 Jul;55(3):275-82.
In this paper, preliminary investigation of various agricultural wastes-Rice mill residue (RM), Wheat mill reside (WM), Dall mill residue (DM) and the Banana peels (BM) was carried out to study their ability to be used as adsorbents for phenol-removal from wastewater. This study reports the feasibility of employing dal mill residue waste (DM) as an adsorbent for removing phenol from wastewater. The performance of DM was compared with the commercially available activated carbon (CAC). Batch mode experiments were conducted with activated DM to study the effects of initial concentration of phenol, pH and the temperature of aqueous solution on adsorption. Equilibrium adsorption isotherms and kinetics were investigated. The experimental data were analyzed by the Langmuir, Freundlich and Temkin models and the isotherm data fitted well to the Freundlich isotherm with monolayer adsorption capacity of 6.189 mg/g. The kinetic data obtained at different concentrations were analyzed using a pseudo-first order and pseudo-second- order equation. The experimental data fitted very well with the pseudo-first-order kinetic model. The FTIR analysis revealed that carboxyl and hydroxyl functional groups were mainly responsible for the sorption of phenol. Finally, the DM was found to be a promising adsorbent for phenol adsorption as compared to activated carbon.
本文对各种农业废弃物——碾米残渣（RM）、磨粉残渣（WM）、豆粕残渣（DM）和香蕉皮（BM）进行了初步研究，以考察它们作为吸附剂从废水中去除苯酚的能力。本研究报道了利用豆粕残渣废弃物（DM）作为吸附剂从废水中去除苯酚的可行性。将DM的性能与市售活性炭（CAC）进行了比较。用活化后的DM进行了间歇式实验，研究了苯酚初始浓度、pH值和水溶液温度对吸附的影响。研究了平衡吸附等温线和动力学。实验数据采用Langmuir、Freundlich和Temkin模型进行分析，等温线数据与Freundlich等温线拟合良好，单层吸附容量为6.189 mg/g。用拟一级和拟二级方程分析了不同浓度下获得的动力学数据。实验数据与拟一级动力学模型拟合得很好。傅里叶变换红外光谱（FTIR）分析表明，羧基和羟基官能团是苯酚吸附的主要原因。最后，与活性炭相比，DM被发现是一种很有前景的苯酚吸附剂。
