![]() ![]() Mercury concentration in the samples was determined using a ditizon indicator and spectrophotometry at 492 nm. Moreover, the effects of changes in pH (6-8, influent mercury concentrations (0.25, 0.5, 0.75, and 1 ppm, contact time (0.5, 1, 2, 3 hr were investigated. ![]() In this research, granular activated carbon, natural zeolite, and anthracite packed- columns were investigated as cheap and effective adsorbents for the removal of mercury. However, these techniques must be investigated for their practicability and economy, in addition to their not only effectiveness. A number of methods are already available for the removal of mercury from water resources. AC-S column regeneration using 0.5 and 1.0M concentration ofĬomparison of Granular Activated Carbon, Natural Clinoptilolite Zeolite, and Anthracite Packed Columns in Removing Mercury from Drinking Waterĭirectory of Open Access Journals (Sweden)įull Text Available Development of effective methods for the removal of such pollutants as heavy metals (e.g., mercury from surface and ground water resources introduced by municipal and industrial wastewaters seems to be inevitable, especially in the face of the importance of water reuse in combating water shortages, limited availability of water resources, and imminent risks of a water crisis in Iran. This model has provided an objective framework to the subjective interpretation of the adsorption system and the model constant obtained here can be used to achieve the ultimate objective of our study that is, up scaling and designing of adsorption process at the pilot plant scale level. At the end, an attempt has also been made to model the data generated from column studies using the empirical relationship based on Bohart-Adams model. Breakthrough curves were plotted for the adsorption of lead on the adsorbent using continuous-flow column operation by varying different operating parameters like hydraulic loading rate (3.0-10.5 m3/(hm2)), bed height (0.3-0.5 m) and feed concentrations (2.0-6.0 mg/l). This has helped in ascertaining the practical applicability of the adsorbent. The aim of carrying out the continuous-flow studies was to assess the effect of various process variables, viz., of bed height, hydraulic loading rate and initial feed concentration on breakthrough time and adsorption capacity. The extent of Pb(II) removal was found to be higher in the treated activated carbon. The lead removal increased for sample of treated carbon. Both the adsorbents are subjected to static mode adsorption studies and then after a comparison based on isotherm analysis more efficient adsorbent is screened for column mode adsorption studies. This has shown a clear change or demarcation in the various physical and chemical properties of the modified adsorbent from its precursor activated carbon. ![]() Characterization of both the adsorbents was one of the key focal areas of the present study. It probes mainly two adsorbents that is, activated carbon (AC) and modified activated carbon (AC-S). In the present study, a deeper understanding of adsorption behavior of Pb(II) from aqueous systems onto activated carbon and treated activated carbon has been attempted via static and column mode studies under various conditions. Goel, Jyotsna Kadirvelu, Krishna Rajagopal, Chitra Kumar Garg, Vinod Removal of lead(II) by adsorption using treated granular activated carbon: batch and column studies.
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