scholarly journals THE EFFECT OF VARIATIONS OF LEAD METAL SOLUTION PH VARIATIONS ON ADSORBENT FROM TIRTA MUSI WASTE MUD WASTE PALEMBANG

Jurnal Tekno ◽  
2021 ◽  
Vol 18 (2) ◽  
pp. 62-70
Author(s):  
Netty Herawati - ◽  
Muhamad Rafiqy ◽  
Kiagus Rahmad Roni ◽  
Heni Juniar
Keyword(s):  
Liquid Waste ◽  
Chemical Compounds ◽  
Absorption Capacity ◽  
Solid Metal ◽  
Solution Ph ◽  
Toxic Heavy Metal ◽  
Surrounding Environment ◽  
Metal Waste ◽  
Lead Metal ◽  
Ph Variations

Industrial waste can cause environmental pollution, one of which is solid metal waste.  Lead is a dangerous and toxic heavy metal that can cause damage to the surrounding environment. Liquid waste containing mercury in industry contains a mixture of chemical compounds that other This causes the pH of the solution in the waste to vary. Lead metal waste needs to be treated with method one of which is the absorption of waste using an adsorbent. To enlarge the pores, the adsorbent will be activated using a 2 M KOH solution with the selected adsorbent, namely the sewage sludge of PDAM Tirta Musi Palembang which contains PAC (Poly Aluminum Chloride) which can help optimize absorption. The level of metal degradation was analyzed using AAS with absorption parameters obtained 4 with an absorption capacity of 23 ,22 mg/g.

Biosorption of Zn(II) from Aqueous Solution by Amusium pleuronectes Shell

2016 ◽  
Vol 675-676 ◽  
pp. 7-10
Author(s):  
K. Chantarasunthon ◽  
Kanyakorn Teanchai ◽  
Wichian Siriprom
Keyword(s):  
Aqueous Solution ◽  
Experimental Investigation ◽  
Contact Time ◽  
Physical Adsorption ◽  
Absorption Capacity ◽  
X Ray Diffraction ◽  
Batch Method ◽  
Solution Ph ◽  
X Ray ◽  
High Level

In this study, the experimental investigation and assessment the absorption capacity for Zn ion with Amusium Pleuronectes shell. The investigations were carried out by batch method and variables of the batch experiment include solution pH, Contact time, were determind. The mechanism of bisorption is chemisorption or/and physical adsorption was confirmed by X-ray Diffraction (XRD) and Energy Dispersive X-ray Fluorescence (EDXRF). The results showed that the Amusium Pleuronectes shell has a high level of absorption capacity for Zn (II) ions. Another that result of mechanism of biosorption suggests and confirm with the result of XRD and EDXRF.

scholarly journals Removal of Heavy Metal Mercury (Hg) Liquid Waste through Electrolysis Method in Paya Ateuk Village, Pasie Raja District, South Aceh

2021 ◽  
Vol 8 (2) ◽  
pp. 45
Author(s):  
Darmawan Darmawan ◽  
Susy Sriwahyuni
Keyword(s):  
Heavy Metal ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Liquid Waste ◽  
Residual Liquid ◽  
Gold Processing ◽  
Electrolysis Process ◽  
Surrounding Environment ◽  
Electrolysis Method ◽  
Removal Technique

Electrolysis is one of the methods used to remove heavy metal mercury (Hg). The electrolysis process is carried out on residual liquid waste from gold processing by utilizing chemical reactions through electrodes immersed in an electrolyte solution. This research method is experimental. We conducted laboratory tests to see the electrolysis process on the residual liquid waste from gold processing in a 10-liter container. We took samples from 10 different containers, 1 liter each from each tub. Sampling time was carried out in the morning, afternoon, and evening. The results showed a significant decrease in mercury (Hg) levels up to 1.30% with 12 volts of electricity for 100 minutes. In contrast, the lowest decrease occurred in the electric current of 3.3 volts within 25 minutes. We use the electrolysis method. This heavy metal removal technique can be applied and managed properly by the community and local government to minimize heavy metal pollution such as mercury in the surrounding environment due to waste from the community's traditional gold processing.

scholarly journals New Water Treatment Chemical PFZSS Preparation and Application

2015 ◽  
Vol 9 (1) ◽  
pp. 121-124
Author(s):  
Qilin Liu
Keyword(s):  
Water Pollution ◽  
Acid Solution ◽  
Water Purification ◽  
Ph Value ◽  
Absorption Capacity ◽  
Iron Sulfate ◽  
Mixed Solution ◽  
Solution Ph ◽  
Purification Method ◽  
Catering Industry

Nowadays global water quality pollution has become extremely serious, and solving water pollution has been extremely urgent, so researches on water pollution solutions have become even urgent. And flocculating method is the most traditional water purification method, research and create new high performance flocculating agent is one of flocculating method inherent problems. The paper mainly describes adding iron, zinc two kinds of metal captions together in polysyllabic acid, well controlling all aspects requirements in technology, researching and creating new water purification substance—poly iron and zinc silicate sulfate flocculants (PFZSS). PFZSS making method is weighting proper amount sodium silicate into container, and meanwhile putting it into water to dissolve, then utilizing dilute euphoric acid and sodium hydroxide to adjust silicic acid solution pH value and arrive at regulated scope, letting it to activate and arrive at certain time, slowly importing activated proper silica acid solution into moderate iron sulfate and zinc sulfate on the condition of fully blending, and finally putting and curing for a while. And implement experiment research on how mixed solution metal cations matching; making method, pH value, and silicon dioxide concentration these factors affect PFZSS overall performance. PFZSS application mainly takes catering industry sewage solution as an example to get PFZSS has very strong absorption capacity, owns good cleaning effects on extremely turbid catering industry treatment sewage COD and turbidity acquiring, its reaction formed flock density is great, sedimentation rate is very fast, so PFZSS will have great application prospects in the aspect of treating urban sewage.

scholarly journals STUDY ON SYNTHESIS OF MnFe2O4/GNPs COMPOSITE AND APPLICATION ON HEAVY METAL REMOVAL

2018 ◽  
Vol 56 (1A) ◽  
pp. 204
Author(s):  
Nguyen Duy Anh
Keyword(s):  
Heavy Metal ◽  
Metal Oxide ◽  
Metal Removal ◽  
Metal Oxide Nanoparticles ◽  
Heavy Metal Removal ◽  
Absorption Capacity ◽  
Mixed Metal Oxide ◽  
Oxide Nanoparticles ◽  
Toxic Heavy Metal ◽  
Mixed Metal

Nowadays, composite materials between mixed-metal oxides and graphene are widely studied due to their multiple applications on different fields. MnFe2O4 is a magnetic material which has the ability to absorb toxic heavy metal in water. Graphene nanoplatelets (GNPs) with about 10 layers, is one of type of graphene. GNPs was used as matrix for the fine distribution of metal oxide nanoparticles. Surface area for the absorption process can be increased. Composite was synthesized using solvothermal method, in which mixed-metal oxide nanoparticles were directly formed in-situ from precursor salts onto GNPs surface. Synthesized material was analyzed using XRD, SEM and EDX methods to determine its properties. Heavy metal absorption capacity was also studied and showed good results.

scholarly journals Optimization of Extraction Process Parameter for Rice Bran Protein Concentrate and its Utilization in High Protein Biscuit Formulation

2020 ◽  
pp. 596-608
Author(s):  
Dilruba Akter ◽  
Rokeya Begum ◽  
Md. Nannur Rahman ◽  
Nasim Talukder ◽  
Md. Jahangir Alam
Keyword(s):  
Protein Content ◽  
Rice Bran ◽  
Extraction Process ◽  
Absorption Capacity ◽  
Total Protein Content ◽  
Protein Concentrate ◽  
Optimum Conditions ◽  
Solution Ph ◽  
Rice Bran Protein ◽  
Rice Bran Protein Concentrate

In the present study rice bran protein concentrate (RBPC) was extracted from defatted rice bran by alkali extraction method and the extracted protein concentrate was characterized and utilized in biscuit production. Protein concentrate was extracted from rice bran at different rice bran water ratio (25.86-54.14) and solution pH (8.09-10.91). The extraction parameters were optimized by response surface methodology. Optimum conditions for protein concentrate extraction ratio were 1:40.77 bran/water and 9.55 pH of solution. At the optimum conditions the extraction yield of protein concentrate was 11.76% and protein content was 36.29% where native rice bran contained 20.78% protein. RBPC contained most of essential amino acids except tryptophan and phenylalanine, among them arginine was the highest 2.27 mg/100g and the lowest was histidine 0.59 mg/100g. RBPC also contained non-essential amino acid like aspartic acid, serine, glutamic acid, alanine, glycine and tyrosine. The emulsifying capacity, emulsion stability, water absorption capacity, bulk density and oil absorption capacity of RBPC were 56 percent, 36 min, 3.02 g/g, 0.49 g/ml and 1.72 g/g respectively. A 5% rice bran protein concentrate supplemented biscuits upgrade the total protein content in biscuits from 7.54 to 9.13. Therefore, utilization of RBPC can be beneficially achieved through formulation of protein enriched biscuits with enhanced nutritional value especially for malnourished or undernourished people.

scholarly journals Biocomposites from anaerobically digested Eichhornia crassipes ((Mart.) Solms), as an alternative solution for the post-phytoremediation process

2021 ◽  
Vol 2 (2) ◽  
pp. 139-144
Author(s):  
Gabriella Marsaulina ◽  
◽  
Taufik Taufikurahman ◽  
Andira Rahmawati
Keyword(s):  
Anaerobic Digestion ◽  
Water Hyacinth ◽  
Eichhornia Crassipes ◽  
Chromium Content ◽  
Liquid Waste ◽  
Absorption Capacity ◽  
Cow Dung ◽  
Anaerobic Digestion Process ◽  
Digestion Process ◽  
Water Hyacinths

Water hyacinth (Eichhornia crassipes) is a plant species commonly used for phytoremediation to reduce high chromium content in tannery liquid waste in Garut, West Java. Water hyacinth materials harvested from the phytoremediation can be used for the anaerobic digestion process to produce biogas and bio-slurry. This study aimed to determine the reduction of chromium content found in water hyacinths due to the anaerobic digestion process, and utilization of bio-slurry from the anaerobic digestion process as a biocomposite material. The anaerobic digestion process was carried out for 33 d using biodigesters and the composition of the biodigesters were varied into 100% dried water hyacinths and 80% water hyacinths with the addition of 20% cow dung. The bio-slurry from the anaerobic digestion process was then used for making biocomposites with 3 different compositions, i.e., 75 and 25%; 50 and 50%; and 25 and 75% of cement and bio-slurry, respectively. The average chromium content found in water hyacinths from the phytoremediation process without anaerobic digestion process was 41.964 mg/l. The results show a reduction in the amount of chromium after the anaerobic digestion process was found in each composition of bio-slurry, which were 15.979 mg/l (100% water hyacinth) and 14.861 mg/l (80% water hyacinth + 20% cow dung). Biodigester with a composition of 80% water hyacinth + 20% cow dung produced the highest average volume of biogas which was 0.424 l. The biocomposite of 75% cement and 25% bio-slurry had the highest compressive strength value of 30.598 MPa and water absorption capacity of 37.25%. It can be concluded that biocomposite with the composition of 75% cement and 25% water hyacinth bio-slurry is promising to be used as an alternative material for buildings.

scholarly journals Adsorption and (induced) desorption of Cd(II) from the corrosion scales of water distribution pipes, following a deliberate contamination event

2021 ◽  
Author(s):  
Shimon Somer ◽  
Noga Fridman-Bishop ◽  
Paz Nativ ◽  
Avi Ostfeld ◽  
Ori Lahav
Keyword(s):  
Distribution Systems ◽  
Water Distribution ◽  
Psychological Impact ◽  
Metal Cations ◽  
Absorption Capacity ◽  
Minor Effect ◽  
Toxic Heavy Metal ◽  
Heavy Metal Cations ◽  
Corrosion Scales ◽  
Contamination Event

Abstract Intrusion of toxic heavy-metal cations into water-distribution systems (WDS) may cause severe adverse health-effects on large populations, along with an undesirable psychological impact. The corrosion (scale) layer, that invariably develops on the pipes’ inner walls, is capable of adsorbing a significant mass of metal-cations and releasing them thereafter via diffusion to the water once operation is resumed, thereby causing a secondary contamination event. To overcome this, the contaminant should be completely removed, in a controlled fashion, from both the aqueous and scale phases, with minimum damage to the pipe's physical stature. This study determined the range of the Cd(II) adsorption capacity of corrosion-scales and quantified alternative treatments for desorbing it, using an assortment of metal water-pipes, extracted from the WDS. Batch, water-recirculation and flow-through experiments were conducted to determine the extent of Cd(II) adsorption and the best way to desorb it. Corrosion-scales showed substantial Cd(II)-absorption capacity (up to 0.75 mg Cd(II)/g scale) with an approximately linear relation between the aqueous Cd(II) concentration and the adsorbed mass. Desorption experiments included dosages of various acids. Sequential rinsing (eight pipe-volumes) by pH3 solution was found to be the best approach, releasing close to ∼100% of the adsorbed Cd(II), with only a minor effect on the pipes’ integrity.

Simulating Solid Tumors with a Microenvironment-Coupled Agent-Based Computational Model

2018 ◽  
Vol 10 (1) ◽  
pp. 90-101
Author(s):  
Dániel Kiss ◽  
Anna Lovrics
Keyword(s):  
Mass Transfer ◽  
Extracellular Matrix ◽  
Blood Vessel ◽  
Computational Model ◽  
Three Dimensional ◽  
Chemical Compounds ◽  
Biological Experiment ◽  
Agent Based ◽  
Dimensional Lattice ◽  
Surrounding Environment

Abstract In this paper, we introduce a three-dimensional lattice-based computational model in which every lattice point can be occupied by an agent of various types (e.g. cancer cell, blood vessel cell or extracellular matrix). The behavior of agents can be associated to different chemical compounds that obey mass-transfer laws such as diffusion and decay in the surrounding environment. Furthermore, agents are also able to produce and consume chemical compounds. After a detailed description, the capabilities of the model are demonstrated by presenting and discussing a simulation of a biological experiment available in the literature.

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