scholarly journals Pemanfaatan Isolat Selulosa Ampas Tebu sebagai Chelating Agent (CAT) Zat Pewarna pada Jajanan Anak Sekolahan (JAS)

2019 ◽  
Vol 1 (2) ◽  
pp. 34-41
Author(s):  
Romario Abdullah ◽  
Karmila Bilondatu ◽  
Wina Zulfiana Tulie ◽  
Wiwin Rewini Kunusa
Keyword(s):  
Adsorption Capacity ◽  
School Children ◽  
Rhodamine B ◽  
Soft Drink ◽  
Chelating Agent ◽  
Synthetic Dyes ◽  
Cellulose Content ◽  
Adsorption Method ◽  
Bagasse Waste

This study aims to detect synthetic dyes in JAS (School Children Snacks) using a chelating agent (CAT) from bagasse waste. Instrumentation used in the analysis was spectronic 20D. Sugarcane pulp cellulose products as CAT adsorbent rhodamine B coloring agent, metanil yellow and tartrazine in JAS were applied to 10 types of soft drink samples circulating in the market in Gorontalo City. The method used is the adsorption method. The adsorption capacity produced by cellulose with 75% content and α-cellulose content was 37.8% for sample 1 (56%) sample 2 (12%), sample 3 (83%), sample 4 (54%), sample 5 (45%) , sample 6 (54%), sample 7 (51%), sample 8 (27%), sample 9 (69%) and sample 10 (25%). The adsorption capacity produced by cellulose was 88.4% and α-cellulose content was 45.2% for sample 1 (56%) sample 2 (12%), sample 3 (83%), sample 4 (54%), sample 5 (45%) , sample 6 (54%), sample 7 (51%), sample 8 (27%), sample 9 (69%) and sample 10 (25%).

Piezoelectric catalytic, photocatalytic and adsorption capability and selectivity removal of various dyes and mixed dye wastewater by ZnO nanoparticles

2022 ◽  
pp. 1-19
Author(s):  
Shengnan Tang ◽  
Huajing Gao ◽  
Shifa Wang ◽  
Leiming Fang ◽  
Xiping Chen ◽  
...  
Keyword(s):  
Particle Size ◽  
Photocatalytic Activity ◽  
Adsorption Capacity ◽  
Rhodamine B ◽  
Zno Nanoparticles ◽  
Chelating Agent ◽  
Catalytic Performance ◽  
Wet Chemistry ◽  
Dependent Behavior ◽  
Internal Mechanism

The C-O functional group decorated ZnO nanoparticles with high UV absorption and VIS/NIR reflectance were synthesized by a simple wet chemistry method using various chelating agents. This study attempts to explore the internal mechanism of the piezoelectric catalytic activity, photocatalytic activity and adsorption performance of ZnO nanoparticles. The phase purity, particle size, optical band gap and photocatalytic activity of ZnO nanoparticles showed strong chelating agent - dependent behavior. The ZnO nanoparticles prepared by using EDTA as a chelating agent exhibits smallest particle size, highest photocatalytic activity for the degradation of methyl orange, methylene blue and rhodamine B, high adsorption capacity for the adsorption of Congo red and high vibration-catalytic performance for the vibration degradation of rhodamine B. The synergies mechanism among piezoelectric catalysis, photocatalysis and adsorption capacity of ZnO nanoparticles are discussed on the basis of the experimental results.

scholarly journals Pemanfaatan cangkang telur dan sekam padi sebagai bioadsorben metilen biru pada limbah tekstil

2021 ◽  
Vol 12 (1) ◽  
pp. 36-43
Author(s):  
Naning Citra Lestari ◽  
Ilham Budiawan ◽  
Ahmad Muhammad Fuadi
Keyword(s):  
Methylene Blue ◽  
Adsorption Capacity ◽  
Rice Husk ◽  
Textile Industry ◽  
Oil And Gas ◽  
Rice Husk Ash ◽  
Oxygen Demand ◽  
Synthetic Dyes ◽  
Adsorption Method ◽  
Dyeing Process

The textile industry in Indonesia has increased since the 1980s. From the non-oil and gas sector, the textile industry is the government's largest source of income. In addition to its impressive growth, about 10-15% of the used textile dyestuff is wasted at the dyeing process can exceed the maximum Chemical Oxygen Demand level of 150 mg/L. Synthetic dyes contain carcinogenic ingredients that can harm the environment and aquatic biota. The alternative for handling the dye waste is the adsorption method using bio adsorbent from a mixture of chicken eggshells and rice husk ash. Both have the potential to be used as adsorbents because they have an active site, abundant amounts, and are economical. This study was to determine the effect of the process variables of the adsorbent mass ratio, contact time, and pH on the adsorption capacity of methylene blue using a mixture of eggshells and rice husk ash with the UV-Vis Spectrophotometer analysis method. The results showed that the optimal conditions for the adsorption of 20 ppm methylene blue were 0.2:0.8 gram of adsorbent ratio, 80 minutes, and pH of 3. The adsorption capacity obtained was 98.817%, reduced the methylene blue concentration to 0.237 ppm. 

Adsorption of Organic Compounds on Refined Latvian Clay

2018 ◽  
Vol 788 ◽  
pp. 83-88
Author(s):  
Oskars Leščinskis ◽  
Ruta Švinka ◽  
Visvaldis Švinka
Keyword(s):  
Methyl Orange ◽  
Zeta Potential ◽  
Adsorption Capacity ◽  
Clay Minerals ◽  
Organic Compounds ◽  
Clay Mineral ◽  
Rhodamine B ◽  
Ph Value ◽  
Ftir Spectra ◽  
Ph Values

Clays are materials consisting of clay minerals and non-clay minerals. Clay mineral fraction is considered to be a nanofraction. Clay minerals can be used for water purification and treatment. Description and characterization of 3 different Latvian clay nanosized minerals from 3 different geological periods (clay Liepa from Devonian period, clay Vadakste from Triassic period and clay Apriki from Quaternary period) as well as their adsorption capacity concerning organic compounds such as methyl orange and rhodamine B are summarized. Nanosized clay mineral particles were obtained using sedimentation method. Particle size distribution, zeta potential and FTIR spectra is given. The adsorption tests of above mentioned organic compounds were carried out in water solutions at 3 different pH values. The adsorption values were determined by means of UV-spectrophotometric technique. Zeta potential values for clay minerals Apriki, Liepa and Vadakste are -40.9 mV, -49.6 mV and -43.0 mV, respectively. FTIR spectra show similar tendencies for all 3 clay minerals. The best adsorption capacity concerning methyl orange and rhodamine B were in solutions with a pH value of 2, whereas at neutral and alkaline pH values adsorption in 24 hours was not observed.

scholarly journals Magnetic biochar from alkali-activated rice straw for removal of rhodamine B from aqueous solution

2019 ◽  
Vol 25 (4) ◽  
pp. 536-544 ◽  
Author(s):  
Zhaogang Ren ◽  
Fang Chen ◽  
Bin Wang ◽  
Zhongxian Song ◽  
Ziyu Zhou ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
Rice Straw ◽  
Rhodamine B ◽  
Electrostatic Interactions ◽  
Organic Dyes ◽  
Low Cost ◽  
Magnetic Biochar ◽  
Other Substances ◽  
Initial Ph ◽  
Alkali Activated

To address organic dye wastewater, economic and effective adsorbents are required. Here, magnetic biochar from alkali-activated rice straw (AMBC) was successfully synthesized using one-step magnetization and carbonization method. The alkaline activation caused the large specific surface area, high pore volume and abundant oxygen-containing groups of the AMBC, and the magnetization gave the AMBC a certain degree of electropositivity and fast equilibrium characteristics. These characteristics collectively contributed to a relative high adsorption capacity of 53.66 mg g<sup>−1</sup> for this adsorbent towards rhodamine B (RhB). In brief, RhB can spontaneously adsorb onto the heterogeneous surface of the AMBC and reach the equilibrium in 60 min. Although the initial pH, ionic strength and other substances of the solution affected the adsorption performance of the AMBC, it could be easily regenerated and reused with considerable adsorption content. Based on the results, H-bonds, π–π stacking and electrostatic interactions were speculated as the primary mechanisms for RhB adsorption onto the AMBC, which was also demonstrated by the FTIR analysis. With the advantageous features of low cost, easy separation, considerable adsorption capacity and favorable stability and reusability, the AMBC would be a potential adsorbent for removing organic dyes from wastewater.

scholarly journals Kandungan bahan tambahan pangan berbahaya pada makanan jajanan anak sekolah dasar di Kabupaten Bantul

2016 ◽  
Vol 4 (1) ◽  
pp. 49 ◽  
Author(s):  
Yhona Paratmanitya ◽  
Aprilia Veriani
Keyword(s):  
Elementary School ◽  
Elementary Schools ◽  
School Children ◽  
Rhodamine B ◽  
Elementary School Children ◽  
Observational Research ◽  
Snack Food ◽  
Chemical Contamination ◽  
Test Kit ◽  
Rhodamin B

<p><strong>ABSTRACT</strong></p><p><em><strong>Background</strong>: The National Agency of Drug and Food Control (BPOM) showed that in 2012, consuming of food is the highest caused of poisoning incidence (66.7%) among others (drug, cosmetics, etc). One of factors influence it was chemical contamination in food, such as borax (sodium tetraborate), formaldehyde, and rhodamine-B. Based on this data, there were 2.93% of borax, 1.34% of formaldehyde, and 1.02% of rhodamine-B detected in the snack foods of elementary school children. Their accumulation may have negative impact on body health.</em></p><p><em><strong>Objectives</strong>: To know the content of food additive substances contamination (borax, formaldehyde, rhodamin-B) in the snack food of elementary school children in Bantul. </em></p><p><em><strong>Methods</strong>: This was an observational research with survey design. The research was done in 68 of elementary schools in District of Bantul. All suspected snack food samples inside and outside the school were analyzed for their chemical contaminations. Qualitative analysis of borax, formaldehyde, and rhodamin-B were done by using curcumin, KMnO4, and test kit methods, respectively. </em></p><p><em><strong>Results</strong>: There were 107 samples collected from 68 elementary schools in Bantul. The most sold sample suspecting of chemical contamination was meatball (22.4%). Among 98 analyzed samples, there were 15 (15.3%) and 25 (25.5%) samples that were proven to have borax and formaldehyde. Meanwhile, there were 7 (46.7%) samples of 15 samples were proven to have rhodamine-B. From the data, there were 34 elementary schools (50%) that have no harmful chemical contamination in their snack food.</em></p><p><em><strong>Conclusions</strong>: The percentage of snack food containing borax, formaldehyde, and rhodamine-B in elementary school in Bantul was still high enough.</em></p><p><strong>KEYWORDS</strong>:<em> snack food, borax, formaldehyde, rhodamine-B</em></p><p><br /><em><strong>ABSTRAK</strong></em></p><p><em><strong>Latar belakang</strong>: Data Badan Pengawas Obat dan Makanan (BPOM) menunjukkan bahwa sepanjang tahun 2012, insiden keracunan akibat mengkonsumsi makanan menduduki posisi paling tinggi, yaitu 66,7%, dibandingkan dengan keracunan akibat penyebab lain, misalnya obat, kosmetika, dan lain-lain. Salah satu penyebab keracunan makanan adalah adanya cemaran kimia dalam makanan tersebut, seperti boraks, formalin dan rhodamin-B. Dalam data tersebut, diketahui 2,93% sampel makanan jajanan pada anak sekolah mengandung boraks, 1,34% mengandung formalin, dan 1,02% mengandung rhodamin-B. Akumulasi bahan-bahan tersebut di dalam tubuh dapat berdampak negatif bagi kesehatan.</em></p><p><em><strong>Tujuan</strong>: Mengetahui persentase makanan jajanan anak sekolah dasar (SD) yang tercemar bahan tambahan pangan berbahaya (boraks, formalin, rhodamin-B) di Kabupaten Bantul. </em></p><p><em><strong>Metode</strong>: Jenis penelitian ini adalah observasional dengan rancangan survei. Penelitian dilaksanakan dengan melibatkan 68 SD di Kabupaten Bantul sebagai sampel. Seluruh makanan jajanan yang dijajakan baik di luar maupun di kantin sekolah dan diduga mengandung bahan kimia berbahaya diuji kandungan cemaran kimianya yaitu kandungan boraks, formalin dan rhodamin-B. Pengujian kualitatif kandungan boraks menggunakan kurkumin, formalin menggunakan KMnO4, dan rhodamin-B menggunakan test kit Rhodamin-B. </em></p><p><em><strong>Hasil</strong>: Terdapat 107 sampel makanan dari 68 SD yang diuji. Jenis makanan jajanan yang diduga mengandung bahan kimia berbahaya yang paling banyak dijajakan di SD adalah jenis bakso (bakso, bakso tusuk, bakso goreng) yaitu sejumlah 22,4% dari seluruh sampel jajanan. Di antara 98 sampel yang diuji kandungan boraks dan formalinnya, 15 sampel (15,3%) positif mengandung boraks dan 25 sampel (25,5%) positif mengandung formalin. Di antara 15 sampel yang diuji kandungan rhodamin-B-nya,</em><br /><em>7 sampel (46,7%) positif mengandung rhodamin-B. Terdapat 34 SD (50%) yang tidak terdapat jajanan yang tercemar bahan kimia berbahaya. </em></p><p><em><strong>Kesimpulan</strong>: Persentase makanan jajanan anak SD yang mengandung boraks, formalin dan rhodamin-B masih cukup tinggi.</em></p><p><strong>KATA KUNCI</strong><em>: makanan jajanan, boraks, formalin, rhodamin-B</em></p>

scholarly journals PEMANFAATAN LIMBAH KULIT BUAH PISANG KEPOK (Musa paradisiaca) SEBAGAI BIOSORBEN ZAT WARNA RHODAMIN B

KOVALEN ◽  
2019 ◽  
Vol 5 (3) ◽  
pp. 308-314
Author(s):  
Musafira Musafira ◽  
Nurfitrah M Adam ◽  
Dwi Juli Puspitasari
Keyword(s):  
Adsorption Capacity ◽  
Rhodamine B ◽  
Contact Time ◽  
Banana Peel ◽  
Musa Paradisiaca ◽  
Randomized Design ◽  
Rhodamine B Dye ◽  
Completely Randomized Design ◽  
Maximum Contact ◽  
Rhodamin B

The investigation about the utilization of Banana peel (Musa paradisiaca) as biosorbent Rhodamine B dye has been done The purpose of this study was to determine the maximum contact time and to determine the adsorption capacity of kepok banana peel. Completely randomized design (CRD) was used in this research with two variables (the contact time and Rhodamine B concentration. Both variables were done in five levels i.e 10, 30, 60, 90, and 120 min and 2, 4, 6, 8 and 10 ppm respectively. The result showed that the maximum concentration of banana peel in adsorbing Rhodamine B was 6 ppm with 120 of contact time, and Rhodamine B adsorption capacity was  4.55mg/g. Keywords: Banana peel, Rhodamine B, biosorbent

Utilization of Powdered Cassava Stem as an Alternative Bioadsorbent for Lead (Pb2+) Removal from Aqueous Solution

2021 ◽  
Vol 1033 ◽  
pp. 82-86
Author(s):  
Tintin Mutiara ◽  
Andira Budi Trimartina ◽  
Rafika Erniza Putri ◽  
Achmad Chafidz
Keyword(s):  
Heavy Metals ◽  
Industrial Waste ◽  
Contact Time ◽  
Metal Ion ◽  
Adsorption Process ◽  
Cellulose Content ◽  
Optimum Conditions ◽  
Adsorption Method ◽  
Cassava Stem ◽  
Mesh Sieve

Industrial waste containing heavy metals can pollute the aquatic environment. One method that can be done to manage heavy waste is the adsorption method that uses adsorbent from cassava stem powder. This research was conducted to utilize cassava stem powder waste for the adsorption of Pb2 + metal ions. Cassava stem powder was mashed until it passed 100 mesh sieve. Cassava stems have a cellulose content of 70-80%, lignin 15-20%, ADF 15-20% and cellulose can be used as an absorber of heavy metals. The adsorption process is carried out with variations in pH, time and concentration under optimum conditions. In this adsorption involves the functional groups contained therein so that the interaction between the adsorbent with the metal ion Pb2 +. Based on the research, the optimum conditions were obtained at pH 6, 180 minutes contact time and 50 ppm concentration. This test is carried out using Atomic Absorption Spectroscopy (AAS).

Dental Fluorosis: Concentration of Fluoride in Drinking Water and Consumption of Bottled Beverages in School Children

2014 ◽  
Vol 38 (4) ◽  
pp. 338-344 ◽  
Author(s):  
N Pérez-Pérez ◽  
N Torres-Mendoza ◽  
A Borges-Yéñez ◽  
ME Irigoyen-Camacho
Keyword(s):  
School Children ◽  
Dental Fluorosis ◽  
Tap Water ◽  
Soft Drink ◽  
Economic Status ◽  
Fluoride Concentration ◽  
Soft Drink Consumption ◽  
Socio Economic Status ◽  
Study Results ◽  
Water Fluoride

Objective: The purpose of the study was to identify dental fluorosis prevalence and to analyze its association with tap water fluoride concentration and beverage consumption in school children from the city of Oaxaca, who were receiving fluoridated salt. Study design: A cross-sectional study was performed on elementary public school children. Dean's Index was applied to assess dental fluorosis. The parents of the children who were studied completed a questionnaire about socio-demographic characteristics and type of beverages consumed by their children. A total of 917 school children participated in this study. Results: Dental fluorosis prevalence was 80.8%. The most frequent fluorosis category was very mild (41.0%), and 16.4% of the children were in the mild category. The mean water fluoride concentration was 0.43 ppm (±0.12). No association was detected between tap water fluoride concentration and fluorosis severity. The multinomial regression model showed an association among the mild fluorosis category and age (OR = 1.25, [95%CI 1.04, 1.50]) and better socio-economic status (OR = 1.78, [95%CI 1.21, 2.60]), controlling for fluoride concentration in water. Moderate and severe fluorosis were associated with soft drink consumption (OR = 2.26, [95%IC 1.01, 5.09]), controlling for age, socio-economic status, and water fluoride concentration. Conclusions: The prevalence of fluorosis was high. Mild fluorosis was associated with higher socio-economic status, while higher fluorosis severity was associated with soft drink consumption.

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