This link might be useful-

https://www.sciencedirect.com/science/article/pii/S0160412004001710

Dear Eman

The main difference between Biosorption and Bioaccumulation is that first one is is a metabolically passive process (does not require energy), while other is active process.

In Biosorption process all the contaminants are absorbed onto the cellular structure and also the amount of contaminants any sorbent can remove is dependent on kinetic equilibrium and the composition of the sorbents cellular surface.

In terms of environmental remediation, biosorption is preferable to bioaccumulation because it occurs at a faster rate and can produce higher concentrations. Since metals are bound onto the cellular surface, biosorption is a reversible process whereas bioaccumulation is only partially reversible.

Regards,

Anchal

Bioaccumulation is the accumulation of substances, such as pesticides, or other chemicals in an organisms. Bioaccumulation occurs when an organism absorbs a substance at rate faster than that at which the substance is lost by catabolism and excretion.

Biosorption is a physicochemical process that occurs naturally in certain biomass which allows it to passively concentrate and bind contaminants on to its cellular structure.

Biosorption as well as bioaccumulation can find an application in removal of contaminants from aqueous solutions. Biosorption by different materials of plant (microalgal biomass, aquatic plants, plant leaves, straw, grass) and animal origin (eggshells, bones) can be applied in industrial wastewater treatment processes. Also, bioaccumulation by aquatic organisms: microalgae, macroalgae and aquatic plants in metal ions removal from effluents can be used to bind metal ions simultaneously with nutrients.

regards

Bioaccumulation is the net accumulation of a substance into the tissues of a living organism as result of uptake from all sources (diet and ambient medium) while biosorption is the ability of certain dead biomass to bind and concentrate some substances in them.

Bioaccumulation is the ability of an organism to accumulate a substance

from its environment. Such as bivalves in the marine environment where they are considered as bioaccumulator of trace metals.

Biosorption has probably the same principle of Adsorption: the mechanism used to remove a non desired substance from a solution using a recognized agent as for example active carbon.

Dear Eman,

Bio-sorption and Bio-accumulation mechanism has same principle of adsorption for plants. If the plants are absorption of more than necessity of the pollutant elements, the elements name will bio-accumulative elements.

Bioaccumulation - where the chemical concentration in an organism achieves a level that exceeds that in the water/media as a result of chemical uptake through all routes of exposure.

Bioaccumulation factor = Conc. in organism/ Conc. in food (or ingested water)

Bio-sorption - Biosorption can be defined as the selective sequestering of metal soluble species that result in the immobilization of the metals by microbial cells. Metal sequestering by different parts of the cell can occur via various processes: complexation, chelation, coordination, ion exchange, precipitation, reduction. This process has unique characteristics. It can effectively sequester dissolved metals from very dilute complex solutions with high efficiency. This makes biosorption an ideal candidate for the treatment of high volume low concentration complex waste-waters.

BIOACCUMULATION- is a process by which certain toxic substances (such as heavy metals) accumulate and keep on accumulating in living organisms, posing a threat to health, life, and to the environment. Also called bioconcentration, biological concentration, or biological magnification.

BIOABSORPTION- is a physico-chemical and metabolically-independent process based on a variety of mechanisms including absorption, adsorption, ion exchange, surface complexation and precipitation.

This link might be useful:

Book Bioaccumulation of some heavy metals in adult tilapia oreoch...

Please check out this reference:

Chang, J.S., Law R., and Chang. C.C. (1997). Biosorption of lead, copper and cadmium by biomass of Pseudomonas aeruginosa PU21. Water Res., 31: 1651-1658.

A comprehensive comparison has been done for the features of biosorption and bioaccumulation in the following paper:

Article Bacterial Biosorbents and Biosorption