Adsorption of paraquat onto activated bleaching earth

• Published in: Bulletin of environmental contamination and toxicology Vol. 69; no. 2; pp. 189 - 194
• Main Authors: TSAI, W. T, HSIEH, M. F, SUN, H. F, CHIEN, S. F, CHEN, H. P
• Format: Journal Article
• Language: English
• Published: New York, NY Springer-Verlag 01.08.2002
• Subjects: activated bleaching earth; Adsorption - drug effects; Agronomy. Soil science and plant productions; Algorithms; Aluminum Silicates - analysis; Applied sciences; Bentonite - chemistry; Biological and medical sciences; Biological and physicochemical properties of pollutants. Interaction in the soil; Exact sciences and technology; Fundamental and applied biological sciences. Psychology; Hydrogen-Ion Concentration; Kinetics; Lithium Chloride - pharmacology; Paraquat - chemistry; Pollution; Potassium Chloride - pharmacology; Sodium Chloride - pharmacology; Soil and sediments pollution; Soil and water pollution; Soil Pollutants - analysis; Soil science; Taiwan; Clay; Plant desiccant; Montmorillonite; Liquid solid adsorption; Pollutant behavior; Iminium compounds; Adsorption isotherm; Pesticides; Clay soil; Soil pollution; Herbicide; Quaternary ammonium compound; Medium effect; pH; Paraquat
• ISSN: 0007-4861; 1432-0800
• DOI: 10.1007/s00128-002-0046-1

There have been many authenticated cases of the detection of pesticide residues (e.g. paraquat) in water sources and factory effluent. Also, regulatory frameworks for pesticides in drinking water and effluent have been developed to protect the health of humans and the environment. Paraquat, also known as methyl viologen, is frequently used as a quaternary ammonium herbicide due to its excellent action within plant cells. In addition, it is known that this compound is one of the most toxic poisons if deliberately or accidentally ingested. Since paraquat is the most widely used pesticide in Taiwan, the maximum contaminant level (MCL) is set at 0.01 mg/L according to the Drinking Water Standard.