| Title | Identification of natural wastes for application in water treatment |
|---|---|
| ID_Doc | 21615 |
| Authors | Ouafi, R; Rais, Z; Taleb, M |
| Title | Identification of natural wastes for application in water treatment |
| Year | 2020 |
| Published | |
| Abstract | Minimizing wastes and making the most of natural resources are the aims of the circular economy. Natural wastes were employed as abundant and inexpensive materials for wastewater treatment. In this context, snail shell powder (SSP) and pine cone powder (PCP) were studied for their ability to remove pollutants from wastewater, especially heavy metals. For the characterization of adsorbents, scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) analysis and measurement of point of zero charge (PZC) were carried out. The PCP crystallinity index was evaluated by the peak height and deconvolution method. The apparent crystallite size was estimated using the Scherrer equation. The SEM micrographs showed the irregular morphology of their particles and the roughness of their surfaces. FTIR analysis allowed the identification of functional groups present on the surface of both adsorbents, mainly related to their abatement capacity. XRD analysis showed that SSP was a calcium carbonate compound in the aragonite mineralogical form. PCP was mainly constituted of cellulose in amorphous and crystalline phase. The PCP deconvolution results indicate that the crystalline peak (200) was directly related to crystallite size. The PZC results were used to explain general connections among points of zero charges and cation exchange capacity of the adsorbents. The PZC values were 7.97 and 5.62 for SSP and PCP, respectively. This work highlights the applicability of the SSP and PCP as available and low-cost natural wastes that can be involved in an efficient and economically appealing wastewater treatment process. |
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