Biosorption Potential of the Microchlorophyte Chlorella vulgaris for Some Pesticides

Abstract

Nowadays, pollution of either surface or ground water with pesticides is considered as one of the greatest challenges facing Humanity and being a national consideration in Egypt. Agricultural activities are the point source of pesticides that polluting water bodies. The present study investigated the potentiality of Chlorella vulgaris for bioremoval of pesticides mixture of 0.1 mg/mL for each component (Atrazine, Molinate, Simazine, Isoproturon, Propanil, Carbofuran, Dimethoate, Pendimethalin, Metoalcholar, Pyriproxin) either as free cells or immobilized in alginate. Two main experiments were conducted including short-term study having 60 min contact time using fresh free and lyophilized cells and other long-term study having five days incubation period using free and immobilized cells. In the short-term study, the presence of living cells led to bioremoval percentage ranged from 86 to 89 and the lyophilized algal biomass achieved bioremoval ranged from 96% to 99%. In long-term study, the presence of growing algae resulted in pesticides bioremoval ranged from 87% to 96.5%. The main mechanism behind the removal of pesticides in water phase is proposed to be biosorption onto the algal cells. This conclusion is based on the short duration required for removal to occur. The obtained results encourage using microalgae in bioremediation of pesticides polluted water.Citation: Hussein MH, Abdullah AM, Din NIBE, Mishaqa ESI (2017) Biosorption Potential of the Microchlorophyte Chlorella vulgaris for Some Pesticides.

Microbial Remediation: A Promising Tool for Reclamation of Contaminated Sites with Special Emphasis on Heavy Metal and Pesticide Pollution: A Review

“…For example, the immobilized algae, Chlorella sp., has been able to degrade butyltin chlorides with much higher efficacy [189]. Similar reports were furnished by Hussein et al [190], revealing that C. vulgaris was able to remove 99% of carbofuran (20 µg/L) and 98% of pendimethalin (10 µg/L).…”

“…Co(II) and Cd(II) in C. humicola can be accumulated in polyphosphate, which has a vital role in the bioremediation of heavy metals [136]. Cultivated microalgae removed various pesticides, including atrazine, molinate, simazine, isoproturn, propanil, dimethoate, carbofuran, metoalcholar, pyriproxin and pendimethalin, in the aqueous phase with the efficacy of 87-96% mainly through bioadsorption mechanisms [190].…”

Remediation of Pesticides by Microalgae as Feasible Approach in Agriculture: Bibliometric Strategies

“…The carbohydrate structure of the microalgal cell wall helps in the biosorption of toxic contaminants [9,61]. A study conducted by Hussein et al [62], reported that biosorption occurs in removing pesticides such as atrazine, carbofuran, dimethoate, and simazine by living Chlorella vulgaris. Since the ouster removal occurs within a short time, it impossible for any action for active uptake and metabolization process to take place.…”

“…In the biosorption process, the solid and liquid phases containing the dissolved or suspended species to be sorbed are involved [62]. Thus, it is defined as the attachment of potentially toxic pesticides elements to the surface of microalgae.…”

Potential Removal of Some Insecticides from Water using Microalgae and their Determination by a Validated UV-Vis Spectrophotometric Method

“…Bioadsorption is a passive process (Årdal et al, 2014). Different mechanisms are involved in bioadsorption, such as electrostatic interaction, surface complexation, ion exchange, absorption, and precipitation (Bilal et al, 2018;Hussein et al, 2017). It was found that 87-96% of a number of pesticides (atrazine, simazine, molinate, isoproturn, carbofuran, propanil, dimethoate, metoacholar, pendimethalin, and pyriproxin) were removed by bioadsorption by cultivated algae.…”