title: A study of some sorbents for adsorption of mancozeb residue from soil of tobacco fields of Mazandaran, Iran by analytical methods.
abstract: The purpose of this study is to accesses the efficiency of removal of pesticide Mancozeb (Dithiocarbamates family) using different sorbents (synthetic zeolite type A, Humic Acid (HA) extracted from soil of Noshahr jungle in the north of Iran and mixture of them). The adsorption efficiency of the adsorbents was evaluated by Freundlich isotherms to select the best sorbent. The main effective parameters such as the amount of sorbents, pH, agitating time and concentrations of Mancozeb were tested. The results for 1.6 ppm of pesticide at pH=5 shows the optimum values 2, 0.75, 0.5 g for HA, zeolite NaA and mixture of them, respectively. The adsorption capacity decreases as pH increases and the adsorption effect for 0.1 g of sorbents at pH=5 were obtained in the order: (mixture of sorbents) > (synthetic zeolite type A) > (extracted Humic Acid).
authors.affiliation: Mazandaran University, Faculty of Chemistry P.O Box 47416-1467, Babolsar, Iran. azizi@umz.ac.ir
authors.forename: S N
authors.initials: SN
authors.lastname: Azizi
authors.forename: M J
authors.initials: MJ
authors.lastname: Chaichi
authors.forename: N
authors.initials: N
authors.lastname: Asemi
mesh_terms: D000327:Adsorption; D004305:Dose-Response Relationship, Drug; D005659:Fungicides, Industrial / Q000737:chemistry*; D006812:Humic Substances; D006863:Hydrogen-Ion Concentration; D008344:Maneb / Q000737:chemistry*; D010573:Pesticide Residues / Q000737:chemistry*; D012989:Soil Pollutants / Q000737:chemistry*; D013696:Temperature; D013997:Time Factors; D014026:Nicotiana / Q000737:chemistry; D017641:Zeolites / Q000737:chemistry; D015038:Zineb / Q000737:chemistry*
chemical_list: D005659:Fungicides, Industrial; D006812:Humic Substances; D010573:Pesticide Residues; D012989:Soil Pollutants; D008344:Maneb; D017641:Zeolites; C013099:mancozeb; D015038:Zineb