tailieunhanh - ENVIRONMENTAL RESTORATION of METALSCONTAMINATED SOILS - CHAPTER 13

Khoáng chất đất sét có sorption cation cao và khả năng trao đổi cation và bề mặt lớn khu vực (Adriano, 1986; Alloway, 1990; Kabata-Pendias và Pendias, 1992). Tự nhiên và tổng hợp zeolit (natri silicat canxi nhôm) có ái lực cao với trái thanh lương trà và đến phức tạp theo dõi các yếu tố, kim loại đặc biệt nặng (Mineyev et al, 1990; Baidina năm 1991; Gworek, Năm 1992, năm 1994; Obukhov và Plekhanova năm 1995; Chlopecka và Adriano, 1996; Shanableh và Kharabsheh, 1996) và xêzi (Campbell và Davies, 1997). Tính chất tương tự như của bentonite (montmorillonite, natri nhôm magiê hydrosilicate) đã được. | 13 Effects of Natural Zeolite and Bentonite on the Phytoavailability of Heavy Metals in Chicory László Simon CONTENTS Materials and Soil Sample Collection and Characterization of Natural Zeolites and Bentonite Used in the Growth Chamber Pot Experiments with Elemental Analysis of Soil and Plant Statistics. 264 Results and Phytoavailability of Heavy Metals in a Galvanic Mud-Contaminated Soil .264 Immobilization of Heavy Metals with Natural Zeolites and Introduction Clay minerals have high cation sorption and cation exchange capacity and large surface area Adriano 1986 Alloway 1990 Kabata-Pendias and Pendias 1992 . Natural and synthetic zeolites sodium aluminum calcium silicates have high affinity to sorb and to complex trace elements particularly heavy metals Mineyev et al. 1990 Baidina 1991 Gworek 1992 1994 Obukhov and Plekhanova 1995 Chlopecka and Adriano 1996 Shanableh and Kharabsheh 1996 and caesium Campbell and Davies 1997 . Similar properties of bentonite montmorillonite sodium aluminum magnesium hydrosilicate were observed by Krebs and Gupta 1994 . Besides other soil additives . lime phosphate apatite iron oxide manganese oxide organic matter natural zeolites and bentonites have the potentiality of immobilizing heavy metals in contaminated soils and of preventing their accumulation in agricultural plants Mench et al. 1998 . During recent decades the environmental consequences of industrialization were neglected in Hungary. In many cases the environmental pollution was not revealed . the contamination of kitchen garden soil with heavy metals in the neighborhood of a former galvanization plant in the city of Nyíregyháza Northeastern Hungary was discovered only 261 2001 by .