The manufacture of adsorbents by utilizing biomass waste continues to be developed to obtain alternative materials with high effectiveness. Adsorbents should be made from easily available materials, have low operating costs, have easy manufacturing processes, and be environmentally friendly. Snake fruit seeds have economic value to be used as activated carbon in the adsorption method for the reduction of Remazol Brilliant Blue. Snake fruit seed charcoal already has a high activated carbon. The activated carbon pores were widened through acid activation, to increase the adsorption capacity of Remazol blue. The purpose of this study was to determine the effect of bio-adsorbent concentration of snake fruit seed charcoal in absorbing Remazol Brilliant Blue levels. Snake fruit seed charcoal has been activated with 1 M HCL to become a bio-adsorbent of snake fruit seed charcoal with various stirrings of 3, 4, 5, 6, 7, rpm. Characterization of bio-adsorbent of snake fruit seed charcoal has been carried out by spectrophotometry UV-VIS, FTIR, SEM, and SEM-EDX. Snake fruit seed was a carbon source that can be used as a base material for activated carbon and adsorbent for Remazol Brilliant Blue dye. So, it has reduced the impact of textile dye waste pollution.
The development of industrial estates in the western part of Sidoarjo Regency include Taman District, Krian District, Balongbendo District, and Tarik District have a major influence on population growth. The existence of the rice fields around the industry indirectly affects the quality of the environment due to industrial activities. The purpose of this research is to identify the spatial distribution of Cadmium heavy metal content in the water in rice fields around the industrial area of Sidoarjo Regency and to identify the spatial distribution it. The parameters taken are cadmium content in soil and water samples in the rice fields. The method used in the study was a survey and laboratory, mapping used the kriging method. The result of the research showed The highest cadmium content is in the rice fields of the Taman sub-district. cadmium content in water is 1.90 ppm while in the soil is 2.43 ppm. The quality level at the four locations was declared to exceed the environmental quality standard. The distribution map showed the area of the Taman sub-district is the highest compared to other sub-districts.
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