Heavy metal contamination is a major environmental issue and a health concern too. These metals are persistent in the environment, contaminate the food chain and are toxic. There are various promising techniques for their removal but adsorption is an ideal alternative to other expensive methods. This review article focuses on different types of low cost adsorbents and their efficiency. There are many remediation methods but adsorption is efficient and cost effective. Adsorption using low cost adsorbents like agricultural waste and marble waste is an innovative solution for heavy metal removal. Agricultural waste are cheap and abundant, these have important benefits over commercial activated carbon. Marble waste is an environmental issue, as this industry is growing, waste disposal has become a huge concern and threat to the environment and human health. This utilization converts the agricultural and marble wastes into value-added product and at the same time decontaminates the environment. This industrial waste reutilization has a major impact on the economic growth of the country.

Keywords: Heavy Metals, Adsorption, Low Cost Adsorbents, Zeolite, Agricultural Waste, Marble Waste, Industrial Waste.

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