23. Strategies to Evaluate the Novel Bioflocculant from Heavy Metal-Tolerant Microorganisms for the Removal of Heavy Metal and Dyes from Wastewater

Water contamination, particularly heavy metal and dye pollution, poses significant challenges to the quality of life in emerging nations. Microbes capable of producing bioflocculants offer a cost-effective, eco-friendly, and biodegradable solution for heavy metal remediation without generating secondary pollutants. We presented a methodical approach in this review to distinguish between different standard operating procedures for characterizing the novel bioflocculant derived from heavy metal-tolerant microorganisms. It is possible to isolate and purify a metal-tolerant bacterium and evaluate its capacity to produce bioflocculant. A variety of techniques will be employed to ascertain the bioflocculant activity and its characterization. Exploring the possibility of various characteristics in combination with flocculant activity to work together harmoniously and have a cumulative effect on better heavy metal remediation from wastewater will be one of these strategies. A typical kaolin suspension method and a NanoZ zeta potential analyzer can be used to assess the flocculating efficiency and mechanism, respectively. Chemical analysis could be used to quantify the bioflocculant's protein and sugar content to characterize it. The elements and monosaccharide composition could be analyzed using X-ray photoelectron spectroscopy (XPS) analysis and gas chromatograph–mass spectrometer (GC–MS) techniques, respectively. Fourier transform infrared (FTIR) and gel-permeation chromatography (GPC) could be used to ascertain the bioflocculant's functional group and molecular weight, respectively. We learned from this chapter how to remove metal from wastewater in percentages, and how to utilize an inductively coupled plasma mass spectrophotometer (ICP-MS) or an atomic absorption spectrophotometer (AAS) to measure any metal that is still present. Recently, the use of bioflocculants has emerged as a viable, environmentally friendly method for removing pollutants from the environment.