Adsorption of specific chloroacetanilides on granular activated carbon

Abstract

Pesticides, as one of the main monitored micropollutants these days, are monitored and determined even in the drinking water, because of their toxic effect on the living organisms. Presence of these pesticides in the drinking water is undesirable and, therefore, they need to be removed. Chloroacetanilides belong to the group of herbicides, which are commonly used in agriculture. Their complex structure prevents common biological degradation, so more complex processes are needed. One of the most efficient process for their removal is adsorption on activated carbon. In this article adsorption of certain chloroacetanilides from water for two different types of granular activated carbon is presented. Matrix used for dilution of pesticides was drinking water and the efficiency of the removal of pesticides ranged from 5 to 60 % for the specific sorption materials and pesticides. This research has shown that adsorption material Filtrasorb 400 is far more efficient than Norit 1240.

Simultaneous removal of mixed pesticides and natural organic matter from surface waters by nitric and chlorosulfonic acid functionalized powdered activated carbon

“…Ormad et al 85 observed 75% removal of alachlor and metolachlor in a 5-min contact time with a 10 mg L −1 PAC dose. Conversely, Marton et al 33 achieved 48% removal of alachlor using 200 mg Filtrasorb 400 GAC after 60 min of contact.…”

“…30 Several adsorption studies on the removal of alachlor, acetochlor, metolachlor and fenthion from water and wastewater were reported in the literature. [32][33][34][35][36][37] However, the presence of natural organic matter (NOM) in water resources may pose complications in the effective removal of pesticides, especially because lowmolecular-weight organics have compelling competitive effects in removing micropollutants through the adsorption process. [38][39][40] The studies on pesticide removal by HNO 3 -and ClSO 3 H-modified AC in the literature are limited.…”

Activated Carbons as Effective Adsorbents of Non-Steroidal Anti-Inflammatory Drugs

“…GAC 1240W activated carbon (GAC), purchased from Norit (Utrecht, The Netherlands), was selected as the adsorbent for the experiment. The reason for this is that this adsorbent is widely used in water treatment plants [8,18,19]. Its textural properties were studied using low-temperature nitrogen adsorption/desorption isotherms.…”

“…Based on the results of these tests, the basic structure parameters were estimated-specific surface area SBET = 900 m 2 g −1 , external surface area SEXT = 523 m 2 g −1 , total pore volume Vt = 0.52 cm GAC 1240W activated carbon (GAC), purchased from Norit (Utrecht, The Netherlands), was selected as the adsorbent for the experiment. The reason for this is that this adsorbent is widely used in water treatment plants [8,18,19]. Its textural properties were studied using low-temperature nitrogen adsorption/desorption isotherms.…”

Development of activated carbon for removal of pesticides from water: case study

“…The advantages and disadvantages of each of the different techniques are presented in Table 1 15 – 19 . However, the most efficient and the most widely used way to arrest pesticides contained in water streams is adsorption on activated carbons 20 . This is due to their large surface area, high adsorption capacity and some content of surface functional groups—often giving to the carbon surface properties enhancing adsorption.…”