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The Research of Nitrobenzene Adsorption Behaviors and Influence Factors of Weihe River’s Medium

Author: HanXiaoMing
Tutor: DengShunXi；QiuLiPing
School: Chang'an University
Course: Environmental Engineering
Keywords: nitrobenzene riverway medium Isothermal non-equilibrium adsorption Isothermal equilibrium adsorption influence factors
CLC: X522
Type: Master's thesis
Year: 2011
Downloads: 41
Quote: 1
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Abstract


The research of organic pollutants of riverway medium about adsorption,transport-ation, etc. environmental behavior is the premise of groundwater pollution control, to grasp the organic pollution mechanism, formulate measures and determine control repair technology, are of great significance. The paper deeply studied the adsorption behavior characteristics and influencing factors of nitrobenzene of weihe streamchannel medium, so as to guide to research the water contamination control of weihe river, reveal the pollution mechanism of the groundwater environment of weihe basin which is aroused by nitrobenzene, seek the effective approach of removal nitrobenzene pollutant and the restoration technology of groundwater environmental which include management and evaluation provide reliable scientific basis.This paper tests the nitrobenzene adsorption behavior of the characteristics and the influence factors of the watercourse medium which adopts the laboratory batch test and numerical simulation in laboratory. The research of isothermal non-equilibrium adsorption shows that the process of solute by liquid adsorption to solid-phase is soon.The fast adsorption period of medium A, B, C, D are no more than 3.5hr. meanwhile the temperature conditions in 15℃. For a patient with the medium from Caotan sampling point, the respectively in adsorption of medium A, B, C, D started about 6hr,13hr, llhr and 5hr before entering slow adsorption period of time, the isothermal balance adsorption period of time is no more than 13hr. The research of isothermal equilibrium adsorption shows that it is more stable that use the amended dual mode model describes the isothermal adsorption process of solid-liquid adsorption system which composed of weihe riverway medium A, B, C, D and the solution of nitrobenzene, also can be better describe the isothermal adsorption proces in the specific solid-liquid adsorption system. The research of constant particle size distribution experiment shows that the adsorption ability to solute is more and more stronger with the smaller size in solid-liquid adsorption system which belong to the same type of medium. The research of environmental pH value experimental shows that the pH value of different solid-liquid adsorption system has no obvious effect to the nitrobenzene adsorption ability which belong to the same type of medium. The research of organic matter experiment shows that medium in a certain range of organic matter content(TOC) have obvious influence on the adsorption capacity in the same type of medium solid-liquid adsorption system,media on the adsorption ability of solute increases with the organic matter content of reinforcement; When the sandy medium with organic matter content under 0.12% which below to medium the force is weak, and with organic matter content greater than 0.12% the influence affect is strong. The research of the nitrobenzene concentration experimental shows that the higher nitrobenzene to solute, medium’s adsorption ability stronger in the configuration of nitrobenzene standard solution concentration range with the same type of medium solid-liquid adsorption system of the solute concentration.

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CLC: > Environmental science, safety science > Environmental pollution and its prevention > Water pollution and its control > River
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