PDF(Pubmed)
Abstract：
A huge amount of textile dyes are released as industrial waste into the environment each year, which alters the water\'s natural appearance and causes toxicity and carcinogenicity in the human body. Peanut husk is considered an agro-waste and contains many valuable compounds, such as cellulose. Different concentrations of cellulose were extracted from peanut husk and then loaded with bio-silver nanoparticles, which were fabricated using neem leaves (Azadirachta indica) as a reducing agent to form Ag-cellulose nanocomposites (Ag-Cell-NCMs). Different devices were used to characterize Ag-Cell-NCMs. The TEM images displayed that the size of Ag-Cell-NCMs ranged between 13.4 and 17.4 nm after dye adsorption. The Ag-Cell-NCMs were used to adsorb toxic dyes such as crystal violet (CV). Different parameters were applied, such as the ratio of cellulose to Ag-NPs, pH, contact time, adsorbent dose, dye concentration, and the temperature required to reach the optimization conditions to remove CV dye from the aqueous solution. Different kinetics and isotherm models were applied to the experimental data to explain the mechanism of the adsorption process. The adsorption of CV on Ag-Cell-NCMs follows the pseudo-second order, and the best-fit isotherm was the Langmuir isotherm. The new composite was tested for the possibility of dye desorption and ability to be reused several times, and we found that the new nanocomposite can be reused for multiple adsorptions and there is a possibility of dye desorption.
摘要：
每年都有大量的纺织染料作为工业废物排放到环境中，这改变了水的自然外观，并在人体中引起毒性和致癌性。花生壳被认为是一种农业废物，含有许多有价值的化合物，如纤维素。从花生壳中提取不同浓度的纤维素，然后负载生物银纳米颗粒，它们是使用印em叶（Azadirachtaindica）作为还原剂制成的，以形成Ag-纤维素纳米复合材料（Ag-Cell-NCM）。使用不同的设备来表征Ag-Cell-NCM。TEM图像显示，在染料吸附后，Ag-Cell-NCM的尺寸在13.4nm和17.4nm之间。Ag-Cell-NCM用于吸附有毒染料,例如结晶紫(CV)。应用了不同的参数，例如纤维素与Ag-NP的比例，pH值,接触时间,吸附剂剂量，染料浓度,和达到从水溶液中除去CV染料的最佳条件所需的温度。将不同的动力学和等温线模型应用于实验数据，以解释吸附过程的机理。CV在Ag-Cell-NCM上的吸附遵循伪二阶，最适合的等温线是朗缪尔等温线。测试了新复合材料的染料解吸的可能性和重复使用多次的能力，我们发现，新的纳米复合材料可以重复使用的多重吸附和有染料解吸的可能性。
