ADDING ACRYLIC ACID TO HEMP ADSORBENT ON METAL ION ADSORPTION CAPABILITY

Abstract

The presence of hazardous heavy metals in waste can have a negative impact on the environment and human health due to industrial waste that pollutes the environment. Waste in the industrial environment must be free from unwanted impurities, including heavy metals. One of the efforts to reduce heavy metal contaminants is the adsorption process. The adsorption process can occur chemically or physically, the success of the adsorption process is greatly influenced by the adsorbent used. The use of hemp as a metal adsorption has various disadvantages so that modifications are needed with the copolymerization grafting method using a monomer of the acrylic-styrene acid mixture so that it is able to better adsorb metals. This study aims to characterize the adsorbent ability of Rami- AA 50% and Rami-AA-STI in adsorption of some metals. In this study, by grafting hemp with a mixture of acrylic-styrene acid monomers (99%:1%), then irradiated with dose variants of 5, 10,15,20, 30 and 40 KGy. The results obtained The best results for the degree of polymerization occurred when hemp AA was 50% at a dose of 40 kGy, namely 257% and at hemp AA-Sti 1% at a dose of 20 kGy, which was 258%, the degree of grafting fluctuated up to several%. The adsorption capacity of hemp against Pb metal ion solution is best at a dose of 30 KGy with an absorption capacity of hemp AA-Sti 1% of 2.94, Cr metal ion, namely Rami AA 50% 10 kGy of 5.59, Cu metal ion, namely Rami AA sample 4ml + 1% styrene 40 kGy of 3.38 and 4ml AA Rami sample + 1% styrene 10 kGy of 1.88.