Article: Treatment and reuse of wastewater in pesticide 2,4-D production Journal: International Journal of Environment and Pollution (IJEP) 2006 Vol.27 No.4 pp.347 - 358 Abstract: Waste-water from the production of pesticide 2,4-D often contains high concentrations of 2,4-DCP and 2,6-D as the primary pollutants. Treatment of waste-water collected from a 2,4-D manufacturer was carried out using a technology combining acidification with hyper-crosslinked resin NDA-150 adsorption process. The overall process recovered 5.4 kg of 2,4-DCP and 0.6 kg of 2,6-D per cubic metre of the wastewater. The treatment reduced the concentration of 2,4-DCP in the wastewater from >6000 mg/L to <0.5 mg/L. The optimal operation parameters of adsorption and desorption were determined. The hyper-crosslinked resin adsorbent can be re-used after regeneration by NaOH aqueous solution. The recovered 2,4-DCP with a sufficiently high purity may be re-used in the production of 2,4-D. The technology may thus be applied to the treatment of waste-water for reclamation of chemicals for 2,4-D production while minimising the environmental nuisances and hazards that may be caused by these chemicals. Inderscience Publishers - linking academia, business and industry through research

Title: Treatment and reuse of wastewater in pesticide 2,4-D production

Authors: Y.P. Qiu, J.L. Chen, A.M. Li, Y.L. Chen, Q.X. Zhang

Addresses: Department of Environmental Science and Technology, East China Normal University, 3663 Zhongshan Road North, Shanghai 200062, PR China. ' State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Nanjing 210093, PR China. ' State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Nanjing 210093, PR China. ' State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Nanjing 210093, PR China. ' State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Nanjing 210093, PR China

Abstract: Waste-water from the production of pesticide 2,4-D often contains high concentrations of 2,4-DCP and 2,6-D as the primary pollutants. Treatment of waste-water collected from a 2,4-D manufacturer was carried out using a technology combining acidification with hyper-crosslinked resin NDA-150 adsorption process. The overall process recovered 5.4 kg of 2,4-DCP and 0.6 kg of 2,6-D per cubic metre of the wastewater. The treatment reduced the concentration of 2,4-DCP in the wastewater from >6000 mg/L to <0.5 mg/L. The optimal operation parameters of adsorption and desorption were determined. The hyper-crosslinked resin adsorbent can be re-used after regeneration by NaOH aqueous solution. The recovered 2,4-DCP with a sufficiently high purity may be re-used in the production of 2,4-D. The technology may thus be applied to the treatment of waste-water for reclamation of chemicals for 2,4-D production while minimising the environmental nuisances and hazards that may be caused by these chemicals.

Keywords: 2,4-D; wastewater; treatment; acidification; adsorption; reuse; pesticides; dichlorophenoxyacetic acids; dichlorophenols.

DOI: 10.1504/IJEP.2006.010577

International Journal of Environment and Pollution, 2006 Vol.27 No.4, pp.347 - 358

Published online: 02 Aug 2006 *

Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article

Title: Treatment and reuse of wastewater in pesticide 2,4-D production

Keep up-to-date