Assessment of Azadirachta indica and Moringa oleifera Leaves Powders as Alternative Coagulants for Water Purification
Azadirachta indica and Moringa oleifera leaves were assessed in relation to alum as alternative coagulants for raw water treatment. After the treatment of the raw water with these biomaterials; pH, turbidity, hardness, microbial count, and the conductivity of the resultant water was analysed. The results of the research show that neem leaves powder treated water had the pH within the range 6.79 ± 0.00 - 6.76 ± 0.01. Whereas, the pH range of 6.78 ± 0.01 - 6.88 ± 0.01 was found after the treatment of the raw water with Moringa oleifera. More so, the alum treated water had range of pH values as 3.36 ± 0.02 - 3.43 ± 0.01. The turbidity of the raw water was found to be 241.00 ±3.61 NTU. After treatment with the various coagulants, the following results were obtained: neem (84.33 ± 4.04 - 115.00 ± 5.00) NTU, moringa (126.00 5.29 - 161.00 ± 3.61) NTU, neem + moringa (37.33 ± 1.16 - 76.33 ± 1.53) NTU, and alum (67.40 ± 1.91 - 84.20 ± 3.33) NTU. In addition, the results indicated that the biomaterials acted comparably to alum with respect to hardness removal. More so, the electrical conductivity (EC) of the water was increased after the treatments with these coagulants, especially with the alum. The microbial load analyses showed that the neem and moringa treated water have less microbes than the alum. Though alum seems to have better performance for turbidity removal, however, the overall results are comparable. Again, the alum can be combined with these biomaterials in water purification seen that the biomaterials are more available, have better antimicrobial actions, and are known to have phytochemicals that give health benefits. In nutshell, waste water can be purified effectively with neem and moringa leaves powder.
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