title: Chromium removal from water by activated carbon developed from waste rubber tires.
abstract: Because of the continuous production of large amount of waste tires, the disposal of waste tires represents a major environmental issue throughout the world. This paper reports the utilization of waste tires (hard-to-dispose waste) as a precursor in the production of activated carbons (pollution-cleaning adsorbent). In the preparation of activated carbon (AC), waste rubber tire (WRT) was thermally treated and activated. The tire-derived activated carbon was characterized by means of scanning electron microscope, energy-dispersive X-ray spectroscopy, FTIR spectrophotometer, and X-ray diffraction. In the IR spectrum, a number of bands centred at about 3409, 2350, 1710, 1650, and 1300-1000 cm(-1) prove the present of hydroxyl and carboxyl groups on the surface of AC in addition to C═C double bonds. The developed AC was tested and evaluated as potential adsorbent removal of chromium (III). Experimental parameters, such as contact time, initial concentration, adsorbent dosage and pH were optimized. A rapid uptake of chromium ions was observed and the equilibrium is achieved in 1 h. It was also found that the adsorption process is pH dependent. This work adds to the global discussion of the cost-effective utilization of waste rubber tires for waste water treatment.
authors.affiliation: Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, 247667, India. vinodfcy@iitr.ernet.in
authors.forename: Vinod Kumar
authors.initials: VK
authors.lastname: Gupta
authors.forename: Imran
authors.initials: I
authors.lastname: Ali
authors.forename: Tawfik A
authors.initials: TA
authors.lastname: Saleh
authors.forename: M N
authors.initials: MN
authors.lastname: Siddiqui
authors.forename: Shilpi
authors.initials: S
authors.lastname: Agarwal
mesh_terms: D000327:Adsorption; D002606:Charcoal; D002857:Chromium / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D012408:Rubber / Q000737:chemistry / Q000633:toxicity; D013052:Spectrometry, X-Ray Emission; D017550:Spectroscopy, Fourier Transform Infrared; D062065:Wastewater; D018508:Water Purification / Q000379:methods*; D014961:X-Ray Diffraction
chemical_list: D002606:Charcoal; D002857:Chromium; D012408:Rubber; D062065:Wastewater