Adsorption on activated carbon, modified carbonaceous products are common. One can always play with different pH, temperature, doses, concentration etc.
Commercially available activated carbon (AC) is the most frequently used adsorbent. Although, AC is widely utilized adsorbent in wastewater treatment systems, still it has some drawbacks such as high cost and difficulties in regeneration.
In last few years, extensive researches have been done to find out different low-cost adsorption materials. You can check the attached file. It is about adsorption of methylene blue on low-cost materials.