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Investigation the Adsorption of Heavy Oil From Solution by Low-Cost Material

机译：低成本材料研究溶液中重油的吸附

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Over the last decades,there has been increasing global concern over the public health impacts attributed to environmental pollution.Natural materials that are available in large quantities or certain waste from agricultural operations may have the potential to be used as low cost adsorbent ,widely available and are environmentally friendly after using them.Thus,rice husk RH,a commonly available waste in Iraq.RH and activated rice husk ARH(pretreated by 13M H2SO4 with 0.5 NaOH and thermally treated at573k)have been studied as sorbents for heavy oil cleanup operations in the aqueous environment(water pumped from brooks to sedimentation unit).Batch adsorption experiments were performed as a function of pH(2-10),adsorbent dose(0.25-lg),initial concentration(l-20g/100ml water),agitation time(15-75min)and different temperature(298-338K),withl00rpm.The maximum removal took place in the pH range of 8,adsorbent dose lg ,initial concentration 20g/100ml water ,agitation time 45 min and temperature 338k.The sorption data obtained from studies at optimized conditions have been subject to Freundlich and Langmuir isotherm studies.The data fits well to both the Freundlich and Langmuir isotherm models indicating favorable and monolayer adsorption.X-ray diffraction analysis ,which indicates that the RH and ARH mainly consist of amorphous materials.The adsorbents were characterized using FTIR.It was found that the pretreatment of rice husk increase the specific surface area and changed the functional groups, therefore leads to increase the capacity of adsorption.
机译：在过去的几十年中，全球越来越关注由环境污染引起的公共健康影响。大量可利用的天然材料或农业生产中的某些废物可能具有用作低成本吸附剂，广泛使用和广泛使用的潜力。因此，米糠RH是伊拉克常见的废物。已经研究了RH和活化稻壳ARH（用0.5M NaOH的13M H2SO4预处理并在573k热处理）作为重油净化操作的吸附剂。分批吸附实验是根据pH（2-10），吸附剂剂量（0.25-lg），初始浓度（l-20g / 100ml水），搅拌时间的函数进行的（15-75min）和不同温度（298-338K），100rpm。在pH 8范围内最大去除量，吸附剂量lg，初始浓度20g / 100ml水，搅拌时间45分钟和温度e 338k。在优化条件下研究获得的吸附数据已接受Freundlich和Langmuir等温线研究，该数据与Freundlich和Langmuir等温线模型都非常吻合，表明有利和单层吸附.X射线衍射分析表明RH和ARH主要由无定形物质组成，用FTIR对吸附剂进行了表征，发现稻壳的预处理增加了比表面积并改变了官能团，从而提高了吸附能力。

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