Experimental investigation on removal of suspended particles from water using flax fibre geotextiles

Abstract

Natural geotextiles are increasingly used in geotechnical applications such as bank protection and short-term soil reinforcement. This study aimed to highlight the behaviour of natural flax fibre geotextiles towards the retention of suspended particles (SP) present in urban runoff and often polluted. Indeed, it is well known that a large fraction of the heavy metals are often associated with the SP. Long-term filtration tests were performed on four laboratory filter designs. The objective was to study the influence of a nonwoven flax fibre geotextiles on SP transfer through a sandy porous media under saturated conditions. The experiments consisted of injecting SP in a column filled with sand with and without flax fibre geotextiles at a constant flow rate. The results showed that nonwoven flax fibre geotextiles can increase flow homogeneity. Retention efficiency of SP at column scale as well as spatial deposition profile was modified by the presence of geotextile. The use of flax fibre geotextiles increases considerably the durability of the filtration system. Particle size analysis of the particles retained in the sand medium and in geotextiles shows that the coarser particles are mainly deposited at the entrance of the column, and in the geotextiles.

Removal of heavy metal ions (Pb2+ and Ni2+) from aqueous solution using nonwovens produced from lignocellulosic milkweed fibers

“…The same optimum pH has been also reported in previous researches in which the adsorption capacity of lignocellulosic fibers has been evaluated [1,14,15,25]. According to Chang et al.…”

“…A plot of t/q t values versus t should result a linear behavior for the applicability of the pseudo-second order kinetic model. The simple Elovich kinetic model [1] is defined using equation (5) in which β and α are constants.…”

“…The introduction of heavy metal ions into the environment from agricultural, industrial and natural disposals has become a major health and environmental concern. Removal of heavy metals from industrial wastewaters can be conducted through various treatments such as coagulation, complexation, adsorption by activated carbon, ion exchange, solvent extraction, foam flotation, electro-deposition, cementation, and membrane operations [1–6]. These techniques are not capable to remove the metal completely, require high energy and also generate toxic sludge [7].…”

“…Abbar et al. [1] examined the influence of different processing variables on optimal removal efficiency of heavy metals from aqueous solution using flax fibers. They demonstrated that flax fibers are effective adsorbent to remove Pb 2+ , Cu 2+ , and Zn 2+ ions from aqueous solutions.…”

Review of Application and Innovation of Geotextiles in Geotechnical Engineering

“…The CBR value of subgrade increases by about 50% [74] Natural geotextiles can also be used for medium and short term filtration or drainage, and natural fibers have the ability to remove heavy metals [78,79]. Abbar et al [80] Studied the effect of linen geotextile on soluble heavy metals using filters filled with sand and flax geotextile.…”