PMC:4764609 / 9096-10660 JSONTXT

{"target":"https://pubannotation.org/docs/sourcedb/PMC/sourceid/4764609","sourcedb":"PMC","sourceid":"4764609","source_url":"https://www.ncbi.nlm.nih.gov/pmc/4764609","text":"Adsorption experimental procedure\nAdsorption was carried out in a batch process by contacting 300 mg of DNES-CH composite with 50 mL of 20 mg/L of copper solution. In the preliminary step, all adsorption experiments were conducted in 250 mL Erlenmayer flasks using one variable at a time. The flasks containing the adsorbate and the adsorbent were agitated on an orbital shaker (REMI make CIS-24BL) at 180 rpm and 30 °C temperature. Samples were taken at predetermined time intervals of 1, 5, 10, 15, 20, 25, 30, 40, 50, 60, 70, 80 and 90 min. For further experiments, contact time was adjusted to optimum. The effect of pH was studied in the range of 2–9. With optimum contact time and pH, metal solutions in the concentration range of 20–100 mg/L were used to assess the effect of initial copper ion concentration. Similarly, the adsorbent dose was varied from 150 to 450 mg and finally temperature was varied between 10 and 50 °C. Each of the experiments was repeated twice and the average values were obtained. At the end of each adsorption process, the adsorbate was filtered out through whatman filter paper and the residual metal concentration was determined by Atomic Absorption Spectrophotometer (Shimadzu make AA-6300) with copper hallow cathode lamp using air acetylene flame at a wavelength of 324.8 nm. The percentage removal was obtained by using the following expression:1 Percentageremoval(\\% )ofmetal=Co-Ce/Co×100where C o is the initial concentration of stock sample (mg/L), C e is the final concentration of stock sample after adsorption (mg/L).","divisions":[{"label":"title","span":{"begin":0,"end":33}},{"label":"label","span":{"begin":1386,"end":1387}}],"tracks":[]}