Various adsorbents to improve the filterability of
#0183;#32;For the diffractogram of silica powder and beach sand, the peak can be observed at 2 angle of and respectively as previously reported by Favors et al. (Favors et al., 2015) and Azmi et al. (2016). The difference in the peak intensities between silica powder and beach sand is due to impurities present in the beach sand.