Production and characterization of water treatment coagulant from locally sourced kaolin clays

Abstract

ABSTRACT:Base on high cost in coagulant for treating both domestic and industrial water in the recent time.There is need to identify cheaper and efficient methods of removing contaminant as the demand for clean water increases. A study was carried out to investigate the use of locally sourced Kaolinite clay from Okefomo Agbarigidoma, Ilorin south Local Government of Kwara state, for the production of aluminum sulphate using sulphuric acid (H2SO4) solution. The clay sample was beneficiated and calcined at 700 o C for 7 h to obtain meta-kaolin, then later leached using sulphuric acid. The effect of leaching temperature (25-100 o C),period of activation (10-120 minutes),acid concentration(1-6M),particle sizes(50-200µm),acid to clay weight ratio on the leaching were investigated. The optimum leaching conditions for the calcined Kaolin clay were found to be particle size 100µm, acid concentration 5M, leaching temperature 110 o C and leaching time of 90 min. Under optimized condition 68.75% (w/w) aluminum sulphate (alum) was extracted. The result showed that sulphuric acid could be used on a large scale to extract alum from Kaolin clay. The extract alum showed similar structure and physical characteristics compared with commercial alum. A dosage of 38mg/L of the extract alum show effective coagulant properties with a great potential of treating Industrial water.

Potential of using kaolin as a natural adsorbent for the removal of pollutants from tannery wastewater

“…(2018)KaolinPRODA, EnuguBatch adsorptionSimulated wastewater (Zn)Ekekwe et al. (2018)KaolinOkefomo, Agbarohidoma, KwaraCoagulationKuranga et al. (2018)KaolinIsuija, EnuguBatch adsorptionCrude oilAkpomie et al.…”

Preparation of aluminium sulphate from kaolin and its performance in combination tanning

“…The use of kaolin as the source of aluminium for the preparation of Al 2 (SO 4 ) 3 has recently gained attention especially in application as a flocculant agent in water treatment due to both environmental concern and economic viewpoint [18,29]. However, there is limited reports pertaining to the use of kaolin based Al 2 (SO 4 ) 3 in combination tanning.…”