Absorption Of Malachite Green Dye In Spent Cci Fee Ground And Spent Tea Ground

ABSTRACT
In this thesis, the ability of spent coffee grounds (SCG) and spent tea ground (STG) as a low-cost adsorbent to remove malachite green (MG) from aqueous solutions was studied. Enormous amounts of tea wastes and coffee waste are generated, which are mostly disposed of in landfills or subjected to incineration or composting. As a result, a number of environmental problems may arise since the degradation of tea waste is difficult. Thus, this thesis is written to determine the optimum absorption process parameters of Spent Coffee Ground and Spent Tea Ground (particle size, initial dye concentration and contact time) and also to synthesize the physical characteristics of the spent coffee ground and spent tea ground. The results obtained show that the percentage of dye removal will decreased with the increased of initial concentration of dye in the range of 10 mg/L, 20 mg/L, 30 mg/L, 40mg/L to 50 mg/L for both Spent Coffee Ground and Spend Tea Ground. Besides, different particle size of Spent Coffee Grounds also shows reduction absorption readings as the particle size increases from 125 um, 250 um and 500 um. Interval of 15mins, 30mins, 45mins, 60mins and 75mins for both SCG and STG was also found to be increased and decrease as the contact time increased.

Keywords: Spent coffee ground, spent tea ground, adsorption, malachite green, particle size