Millions of people die annually due to waterborne diseases showing the world’s leading killer is water-borne diseases. Though the earth is covered mainly with water, only a tiny fraction of water is safe for human consumption that get rapidly polluted than the natural recovery rate. Number of water pollutants can be identified such as inorganic anions, heavy metals, organic compounds, microplastics and microorganisms. One of the prevailing challenges in existing water purifying methods is the inability to remove heavy metals and arsenic (inorganic anions and cations) in a one-step process at a lower cost with minimal energy when trace concentrations are present. It was identified that a promising solution should be equipped with following characteristics: the ability to uptake interested pollutants, no/fewer health implications, eco-friendliness, cost-effectiveness and able to perform in high environmental temperatures (⁓ 40 ℃). Focusing on nature inspired approach, Kaolin clay was chosen as main precursor. More reactive metakaolinite was derived from the natural clay and a nano/microcomposite was synthesised with alpha alumina (MK/Al). It is assumed that since metakaolinite is a porous material with both negatively and positively charged sites, it exhibits an ability to attract both anions and cations, and trap bigger pollutants. Research focus was directed towards understanding the structure of the material, the ability to decontaminate As(V) and Fluoride (inorganic anions), and the ability to decontaminate Pb(II) and Cd(II) (heavy metals). Variation of the pollutant uptake with different conditions such as temperature and pH were investigated followed by the isotherm model analysis with Langmuir, Freundlich and Dubinin-Radushkevich models. Designing the experiments were mainly involved with batch experiments while preliminary studies were carried out for fixed-bed column experiments. As hypothesised, MK/Al nano/microcomposite showed excellent ability to remove As(V), Fluoride, Pb(II) and Cd(II). More importantly, the nano/microcomposite MK/Al showed the aforementioned characteristics of a promising candidate for the water treatment. This research talks about a novel material and introduces many research areas in material designing and field applications towards household and mass water treatment strategies.