Biological activity and environmental impact of anionic surfactants
The newest results regarding the biological activity and environmental fate of anionic surfactants area unit collected and critically evaluated. The chemical and chemical science parameters associated with the biological activity and also the field of application area unit in brief mentioned. Examples on the impact of anionic surfactants on the cell membranes, on the activity of enzymes, on the binding to numerous proteins and to different cell elements and on their human toxicity area unit bestowed and also the potential mode of action is elucidated. The sources of environmental pollution caused by anionic surfactants area unit listed and also the ways developed for his or her removal from liquid, liquid and solid matrices area unit collected. [1]
Equilibrium Study of Single-Solute Adsorption of Anionic Surfactants with Polymeric XAD Resins
Equilibrium information for the surface assimilation of metallic element lauryl salt (SLS) and sodium dodecylbenzene salt (SDBS) from liquid solutions by Amberlite XAD-4 and XAD-7 compound resins at temperatures within the 10–40°C vary are obtained. the precise expanse of the resins plays a serious role in surface assimilation, and therefore the most effective results are obtained with XAD-4 rosin. a better surface assimilation of SDBS over SLS was conjointly ascertained. many surface assimilation isopleth models are accustomed work the experimental information. the most effective results are obtained with the Redlich-Peterson and Langmuir-Freundlich equations. [2]
Electrostatic interactions in dissipative particle dynamics—simulation of polyelectrolytes and anionic surfactants
Electrostatic interactions are incorporated in dissipative particle dynamics (DPD) simulation. The electric field is solved regionally on a grid. inside this formalism, native inhomogeneities within the electricity permittivity will be treated with none downside. Key problems just like the screening of the potential close to a charged surface and also the Stillinger–Lovett moment conditions square measure happy. this means that the strategy captures the essential options of electricity interaction. For the direct simulation of mixed surfactants close to oil–water interfaces, or for the simulation of Coulombic polymer–surfactant interactions, this methodology has all the benefits of DPD over full atomistical molecular dynamics (MD). DPD has tried to be quicker than MD by several orders of magnitude, betting on the precise scaling issue chosen for the simulation. [3]
The Role of Electrostatic Repulsion on Increasing Surface Activity of Anionic Surfactants in the Presence of Hydrophilic Silica Nanoparticles
Hydrophilic silicon oxide nanoparticles alone don’t seem to be surface active. They, however, develop a powerful static interaction with ionic surfactants and consequently have an effect on their surface behavior. we tend to report the surface behavior of n-heptane/anionic-surfactant-solutions within the presence of hydrophilic silicon oxide nanoparticles. The surfactants are Na dodecyl salt (SDS) and dodecyl benzine acid (DBSA), and therefore the diameters of the used particles are nine and thirty nm. victimisation experimental tensiometry, we tend to show that nanoparticles retain their non-surface-active nature within the presence of surface-active agents and therefore the surface activity of surfactant directly will increase with the concentration of nanoparticles. [4]
Microbial Degradation of Anionic Surfactants from Laundry Detergents Commonly Discharged into a Riverine Ecosystem
The biodegradability of anionic wetting agents and therefore the presence of surfactant degrading microorganism within the New Calabar stream set in Choba, Federal Republic of Nigeria was investigated. Eleven (11) regionally factory-made and 6 (6) foreign brands were studied aboard atomic number 11 dodecyl salt (SDS) used as a typical. Total heterotrophic counts were determined mistreatment the unfold plate technique on medium whereas mineral salt agar was used for the isolation and enumeration of the detergent utilisers. The stream die-away methylthionine chloride Active Substance (MBAS) technique was wont to confirm the extent of primary degradation of the surfactants within the detergents. Investigations discovered that the expansion of surfactant-utilising microorganism was supported by all the detergents, at a amount of three mg/L. [5]
Reference
[1] Cserháti, T., Forgács, E. and Oros, G., 2002. Biological activity and environmental impact of anionic surfactants. Environment international, 28(5), pp.337-348. (Web Link)
[2] Garcia-Delgado, R.A., Cotoruelo-Minguez, L.M. and Rodriguez, J.J., 1992. Equilibrium study of single-solute adsorption of anionic surfactants with polymeric XAD resins. Separation Science and Technology, 27(7), pp.975-987. (Web Link)
[3] Groot, R.D., 2003. Electrostatic interactions in dissipative particle dynamics—simulation of polyelectrolytes and anionic surfactants. The Journal of chemical physics, 118(24), pp.11265-11277. (Web Link)
[4] The Role of Electrostatic Repulsion on Increasing Surface Activity of Anionic Surfactants in the Presence of Hydrophilic Silica Nanoparticles
Hamid Vatanparast, Farshid Shahabi, Alireza Bahramian, Aliyar Javadi & Reinhard Miller
Scientific Reportsvolume 8, Article number: 7251 (2018) (Web Link)
[5] U. Osadebe, A., A. Onyiliogwu, C., M. Suleiman, B. and C. Okpokwasili, G. (2018) “Microbial Degradation of Anionic Surfactants from Laundry Detergents Commonly Discharged into a Riverine Ecosystem”, Journal of Applied Life Sciences International, 16(4), pp. 1-11. doi: 10.9734/JALSI/2018/40131. (Web Link)
