Do grain size of the sediments influence the rate of chemical weathering in aquatic environment?
As the grain size increases the rock weathering rate decreases initially beyond a critical size no significant decrease in the rate is recorded (Israeli and Emmanuel, 2018).
I think so, but more important than the grain size, it will depend on its chemical components.
Surely it does. With progressive reduction of grain size works to enhance the reactive surfaces, while the increase of size reduces the surface available for reaction.
Yes, grain size of sediments affect the chemical weathering of sediments. The smaller the grain size, the larger the surface area available for possible increased elemental chemical reaction and thus possible increase in chemical weathering of the sediments but, larger grain size reduces the surface area available for chemical reaction and thus a reduction in chemical weathering, of course temperature can be a controlling factor.
I agree with the colleagues above. However, mineralogical composition including Fe-bearing minerals is also important for the increase of weathering rate.
I agree with all the suggestions above. Please also think about the physical and chemical conditions of water column.
Both chemical and mechanical processes act together to control the weathering rate of rocks. In rocks with micrometer size grains, enhanced dissolution at grain boundaries has been observed to cause the mechanical detachment of particles.
for getting extra information please refer to this article:
https://www.earth-surf-dynam.net/6/319/2018/esurf-6-319-2018.pdf
i hope it will be useful for you.