Department of Biological Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India.
J Hazard Mater. 2010 Feb 15;174(1-3):47-53. doi: 10.1016/j.jhazmat.2009.09.014. Epub 2009 Sep 8.
Adsorption of malathion on Rhizopus oryzae biomass (ROB) with special reference to binding mechanism has been described. ROB has been found to adsorb approximately 85% of malathion from its aqueous solution as against 47-68% by other fungal biomasses. Hydrogen ion concentration does not influence the adsorption of malathion by ROB which follows Langmuir-Freundlich dual equilibrium isotherm model (r(2)=0.998). Both physical and chemical interactions are responsible for binding of malathion on ROB. Scanning electron micrographs and EDXA spectra exhibit adsorption of the pesticide on cell surface of ROB. Studies with cell surface polysaccharides show that chitosan through its amine groups contributes largely in the adsorption of malathion. Extraction of lipids from ROB decreases its adsorption capacity to the extent of 36.37-94.02%, depending on the polarity of the solvent.
已经描述了稻根霉生物量（ROB）对马拉硫磷的吸附作用，特别是结合机制。与其他真菌生物量相比，ROB 从其水溶液中吸附约 85%的马拉硫磷，而吸附率为 47-68%。氢离子浓度不会影响 ROB 对马拉硫磷的吸附，ROB 遵循朗缪尔-弗伦德利希双平衡等温线模型（r(2)=0.998）。物理和化学相互作用都负责马拉硫磷在 ROB 上的结合。扫描电子显微镜和 EDXA 图谱显示出农药在 ROB 细胞表面的吸附。细胞表面多糖的研究表明，壳聚糖通过其氨基基团在马拉硫磷的吸附中起主要作用。ROB 中脂质的提取使其吸附能力降低，降低幅度为 36.37-94.02%，这取决于溶剂的极性。
