REMEDIATION POTENTIALS OF WHEAT-BRAN AND WOOD-CHIPS ON EFFLUENT CONTAMINATED SOILS FROM PAINT ......

On paint effluent-polluted soils, the remediation potentials of wheat bran and wood chips as bulking agents were assessed. For a period of 24 weeks, different concentrations of bulking agents (10%, 30%, and 50%) were injected into effluent-polluted soils, and the physicochemical and microbiological properties of the soils were monitored. According to the Mean Heterotrophic Count (THC) of Bacterial and Fungal Isolates from Paint Effluents, effluents from sample F had the greatest bacterial count of 6.662.51 × 104 cfu/ml, while sample B had the lowest bacterial count of 1.72.00 x 104 cfu/ml. The maximum fungal count was 7.50.21 x104 cfu/ml in sample B, while the lowest was 5.712.10 x104 cfu/ml in sample E. Staphylococcus, Klebsiella, Bacillus, Rhizobium, Pseudomonas, Salmonella, Mucor, Aspergillus niger, Fusarium, Penicillium funiculosum, and Geotrichum are among the bacteria recovered from paint industry effluents. Wood chips have 3.20x104cfu/g and 1.58x104cfu/g, respectively, whereas Wheat bran has 3.47x104cfu/g and 1.77x104cfu/g, according to bacterial and fungal counts. Saccharomyces cerevisiae, Rhodotorula species, Rhizopus species, Aspergillus niger, Aspergillus flavus, and Penicillum notatum are among the fungi isolated from the bulking agents. Over the course of a 6-month remediation period, the bacterial and fungal counts of the paint-effluent polluted soil combined with bulking agents climbed gradually from week 1 to week 8, then declined from week 9 onwards. Microbial growth was slightly increased in the polluted soil without amendment. The 50 percent altered option had the highest microbial growth rates, followed by 30 percent, 10%, and finally the control. Pseudomonas putida, Serratia spp., Flavobacterium spp., Micrococcus spp., Bacillus spp., Klebsiella spp., and Arthrobacter spp. were among the Total Heterotrophic Bacteria recovered from the polluted soil treated with bulking agents. The pH ranges from 6.600.10 to 7.540.09 for the paint effluent polluted soil modified with a combination of bulking agents over the 24 weeks of remediation, according to the Mean Physicochemical Properties of the paint-effluent contaminated soil mixed with bulking agents. At p 0.05, there was a significant statistical difference in zinc, total nitrogen, total organic carbon, and electrical conductivity levels across the samples during the remediation period. The bean seeds (Vicia faba) sprout after 6 days of planting in the germination test, but very little in the 50 percent treatment samples. The study, on the other hand, shows that treating paint effluent polluted soils with a combination of bulking agents, primarily at a 50 percent amendment concentration, reduces pollutant toxicity and increases germination percentage.

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