Logam berat adalah kelompok logam yang memiliki densitas lebih besar dari 5 g/cm3 pada umumnya mempunyai sifat toksik dan berbahaya bagi organisme hidup. Salah satu cara untuk menyerap dengan adsorpsi menggunakan karbon aktif sekam padi. Penelitian ini bertujuan menguji efektifitas padi terhadap penyerapan Pb serta mengkaji kondisi optimum menghasilkan efisiensi masing-masing variabel proses RS...

Compost from pine bark has been previously suggested as an effective low-cost biosorbent for different classes of textile dyes, although the existing studies have performed in non-competitive batch conditions, so effect competition or adsorption continuous-flow conditions not assessed. In this work, removal Basic Violet 10 (BV10) and Direct Blue 151 (DB151) by compost single bi-solute mixtures ...

release  volatile  organic  compounds  (vocs)  as  environmental  and  occupational  pollutant  cause  macro perspective affect such as climate change, humans and economic consequences. although fixed bed absorber is widely used as a controlling method because of its economically and availability, but these absorbers are facing some issue like high pressure drop, non-uniform distribution of flu...

~ The depletion process of copper ions from dilute solutions has been used as a model system to investigate the spouted bed cell with a three-dimensional electrode of conducting particles. Experiments under potentiostatic and galvanostatic conditions have been carried out. Results obtained indicate that the spouted bed cell has several favourable characteristics for application in metal recover...

in a novel dual bed reactor fischer-tropsch synthesis was studied by using two diffrent cobalt catalysts. an alkali-promoted cobalt catalyst was used in the first bed of a fixed-bed reactor followed by a rutenuim promoted cobalt catalyst in the second bed. the activity, product selectivity and accelerated deactivation of the system were assessed and compared with a conventional single bed react...

The kinetic parameters of both glucose isomerization to fructose and immobilized glucose isomerase (GI) inactivation calculated under different conditions are compared and discussed. Utilizing these figures, the possibility of generalizing a linear model, previously proposed for the kinetics of glucose isomerization by immobilized glucose isomerase, is investigated, so as to apply them to whole...

Seed induces and promotes the crystallization of calcium phosphate, and acts as carrier of the recovered phosphorus (P). In order to select suitable seed for P recovery from wastewater, three seeds including Apatite (AP), Juraperle (JP) and phosphate-modified Juraperle (M-JP) were tested and compared. Batch and fixed-bed column experiments of seeded crystallization of calcium phosphate were und...

Cr (III) removal from aqueous solutions by sorption in a fixed bed column filled with alizarin S impregnated hemp fibers has been studied. The effect of the initial metal ion concentration on the Cr (III) sorption process was investigated and the experimental breakthrough curves were obtained. The breakthrough time and saturation time decreased from 110 min to 80 min and from 300 min to 160 min...