Treatment of Electroplating Wastewater Using NF pH-Stable Membranes: Characterization and Application

Industrial adoption of nanofiltration (NF) for treatment of low-pH wastewater is hindered by the limited membrane lifetime at strongly acidic conditions. In this study, the electroplating wastewater (EPWW) filtration performance of a novel pH-stable NF membrane is compared against a commercial NF membrane and a reverse osmosis (RO) membrane. The presented membrane is relatively hydrophobic and has its isoelectric point (IEP) at pH 4.1, with a high and positive zeta potential of +10 mV at pH 3. A novel method was developed to determine the molecular weight cut-off (MWCO) at a pH of 2, with a finding that the membrane maintains the same MWCO (~500 Da) as under neutral pH operating conditions, whereas the commercial membrane significantly increases it. In crossflow filtration experiments with simulated EPWW, rejections above 75% are observed for all heavy metals (compared to only 30% of the commercial membrane), while keeping the same pH in the feed and permeate. Despite the relatively lower permeance of the prepared membrane (~1 L/(m2·h·bar) versus ~4 L/(m2·h·bar) of the commercial membrane), its high heavy metals rejection coupled with a very low acid rejection makes it suitable for acid recovery applications.

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A novel Fe recycling method from pickling wastewater producing a KFeS2 whisker for electroplating wastewater treatment

Environmental Science Water Research & Technology ◽

10.1039/d1ew00085c ◽

2021 ◽

Author(s):

Dongxu Liang ◽

Manhong Ji ◽

Suiyi Zhu ◽

Yu Chen ◽

Zhihua Wang ◽

...

Keyword(s):

Heavy Metals ◽

Wastewater Treatment ◽

Hydrothermal Method ◽

Facile Hydrothermal Method ◽

Electroplating Wastewater ◽

Pickling Sludge

Pickling sludge was converted to a novel product of KFeS2 nanorods via a facile hydrothermal method that effectively removes heavy metals from electroplating wastewater.

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Recovering heavy metals from electroplating wastewater and their conversion into Zn2Cr-layered double hydroxide (LDH) for pyrophosphate removal from industrial wastewater

Chemosphere ◽

10.1016/j.chemosphere.2021.129861 ◽

2021 ◽

Vol 271 ◽

pp. 129861 ◽

Cited By ~ 1

Author(s):

Dun Fu ◽

Tonni Agustiono Kurniawan ◽

Ram Avtar ◽

Pan Xu ◽

Mohd Hafiz Dzarfan Othman

Keyword(s):

Heavy Metals ◽

Layered Double Hydroxide ◽

Industrial Wastewater ◽

Electroplating Wastewater ◽

Double Hydroxide

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Green Synthesis: A Novel Method for Bromination of 7-AminoPhthalide

10.26434/chemrxiv.12980927.v2 ◽

2021 ◽

Author(s):

Sudershan Reddy Gondi

Keyword(s):

Green Synthesis ◽

Potential Utility ◽

Environment Friendly ◽

Aryl Amines ◽

Novel Method ◽

Higher Temperature ◽

Acidic Conditions

<div>A novel method for preparing a bromo substituted 7-Amino-phthalides and 7-</div><div>Amino-3-hydroxy-phthalides via the bromonium ion intermediate under acidic conditions at</div><div>higher temperature were developed. The results will illustrate the potential utility of this</div><div>method as an environment-friendly process for synthesis of bromo substituted aryl amines,</div><div>along with conservation of half mole equivalent of halides.</div>

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Removal of Dyes from Aqueous Solutions by Adsorption on Chrome-Tanned Solid Wastes Generated in the Leather Industry

Water Quality Research Journal ◽

10.2166/wqrj.2003.025 ◽

2003 ◽

Vol 38 (2) ◽

pp. 393-411 ◽

Cited By ~ 18

Author(s):

Soufiane Tahiri ◽

Ali Messaoudi ◽

Abderrahman Albizane ◽

Mohamed Azzi ◽

Mohamed Bouhria ◽

...

Keyword(s):

Aqueous Solutions ◽

Operating Conditions ◽

Solid Wastes ◽

Cationic Dyes ◽

Optimum Operating ◽

Leather Industry ◽

Anionic Dyes ◽

Ph Values ◽

Acidic Conditions ◽

Dyes Adsorption

Abstract In this work, the ability of chrome shavings and of crust leather buffing dusts to remove dyes from aqueous solutions has been studied. Buffing dusts proved to be a much better adsorbent than chrome shavings for cationic dyes. The adsorption of anionic dyes is very important on two studied wastes. The pH has an obvious influence on the adsorption of dyes. Adsorption of cationic dyes is less favourable under acidic conditions (pH <3.5) and at high pH values (pH >10.5). The adsorption of anionic dyes on both adsorbents is more favourable under acidic conditions (pH <3). The adsorption on chrome shavings is improved by the use of finer particles. The kinetic adsorption was also studied. Adsorption isotherms, at the optimum operating conditions, were determined. Adsorption follows the Langmuir model. The isotherm parameters have been calculated. The column technique could be applied to treat significant volumes of solutions.

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Incorporating Neural Network Material Models Within Finite Element Analysis for Rheological Behavior Prediction

Journal of Pressure Vessel Technology ◽

10.1115/1.2389004 ◽

2006 ◽

Vol 129 (1) ◽

pp. 58-65 ◽

Cited By ~ 12

Author(s):

B. Scott Kessler ◽

A. Sherif El-Gizawy ◽

Douglas E. Smith

Keyword(s):

Finite Element ◽

Effective Means ◽

Element Model ◽

Operating Conditions ◽

Behavior Prediction ◽

Element Analysis ◽

Material Models ◽

Rheological Models ◽

Wide Range ◽

Novel Method

The accuracy of a finite element model for design and analysis of a metal forging operation is limited by the incorporated material model’s ability to predict deformation behavior over a wide range of operating conditions. Current rheological models prove deficient in several respects due to the difficulty in establishing complicated relations between many parameters. More recently, artificial neural networks (ANN) have been suggested as an effective means to overcome these difficulties. To this end, a robust ANN with the ability to determine flow stresses based on strain, strain rate, and temperature is developed and linked with finite element code. Comparisons of this novel method with conventional means are carried out to demonstrate the advantages of this approach.

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Removal and recovery of heavy metals from electroplating wastewater by using Kyanite as an adsorbent

Journal of Hazardous Materials ◽

10.1016/s0304-3894(01)00234-5 ◽

2001 ◽

Vol 87 (1-3) ◽

pp. 127-137 ◽

Cited By ~ 62

Author(s):

Mohammad Ajmal ◽

Rifaqat A.K Rao ◽

Rais Ahmad ◽

Jameel Ahmad ◽

Liaqat A.K Rao

Keyword(s):

Heavy Metals ◽

Electroplating Wastewater ◽

Removal And Recovery

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Copper and Lead Ions Removal by Electrocoagulation: Process Performance and Implications for Energy Consumption

International Journal of Renewable Energy Development ◽

10.14710/ijred.2021.31665 ◽

2021 ◽

Vol 10 (3) ◽

pp. 415-424

Author(s):

Aji Prasetyaningrum ◽

Dessy Ariyanti ◽

Widayat Widayat ◽

Bakti Jos

Keyword(s):

Heavy Metals ◽

Energy Consumption ◽

Removal Efficiency ◽

Current Density ◽

High Current Density ◽

Energy Requirement ◽

Lead Ions ◽

Initial Concentration ◽

Electroplating Wastewater ◽

Electrocoagulation Process

Electroplating wastewater contains high amount of heavy metals that can cause serious problems to humans and the environment. Therefore, it is necessary to remove heavy metals from electroplating wastewater. The aim of this research was to examine the electrocoagulation (EC) process for removing the copper (Cu) and lead (Pb) ions from wastewater using aluminum electrodes. It also analyzes the removal efficiency and energy requirement rate of the EC method for heavy metals removal from wastewater. Regarding this matter, the operational parameters of the EC process were varied, including time (20−40 min), current density (40−80 A/m2), pH (3−11), and initial concentration of heavy metals. The concentration of heavy metals ions was analyzed using the atomic absorption spectroscopy (AAS) method. The results showed that the concentration of lead and copper ions decreased with the increase in EC time. The current density was observed as a notable parameter. High current density has an effect on increasing energy consumption. On the other hand, the performance of the electrocoagulation process decreased at low pH. The higher initial concentration of heavy metals resulted in higher removal efficiency than the lower concentration. The removal efficiency of copper and lead ions was 89.88% and 98.76%, respectively, at 40 min with electrocoagulation treatment of 80 A/m2 current density and pH 9. At this condition, the speciﬁc amounts of dissolved electrodes were 0.2201 kg/m3, and the energy consumption was 21.6 kWh/m3. The kinetic study showed that the removal of the ions follows the first-order model.

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Biosorption of heavy metals from actual electroplating wastewater using encapsulatedMoringa oleiferabeads in fixed bed column

Desalination and Water Treatment ◽

10.1080/19443994.2014.985725 ◽

2014 ◽

Vol 57 (8) ◽

pp. 3572-3587 ◽

Cited By ~ 9

Author(s):

Kannan Radhakrishnan ◽

Lakshmi Sethuraman ◽

Radha Panjanathan ◽

Aparna Natarajan ◽

Vishali Solaiappan ◽

...

Keyword(s):

Heavy Metals ◽

Fixed Bed ◽

Fixed Bed Column ◽

Electroplating Wastewater ◽

Biosorption Of Heavy Metals

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Removal of Monoethanolamine from Wastewater by Composite Reverse Osmosis Membrane

Jurnal Teknologi ◽

10.11113/jt.v68.3031 ◽

2014 ◽

Vol 68 (5) ◽

Author(s):

Azry Borhan ◽

Muhammad Muhibbudin Mat Johari

Keyword(s):

Reverse Osmosis ◽

Operating Parameter ◽

Operating Conditions ◽

Optimum Operating ◽

Transmembrane Pressure ◽

Processing Plant ◽

Permeate Flux ◽

Feed Concentration ◽

Desorption Process ◽

Ro Membrane

Monoethanolamine (MEA) has been vastly used for the removal of carbon dioxide (CO2) in natural gas processing plant. However, during the absorption-desorption process and maintenance activities, a small amount of amine get carries over and discharged into the effluent wastewater stream. Due to its high Chemical Oxygen Demand (COD) and require large volume of water for dilution, therefore treatment of MEA contaminated wastewater is a major concern in most amine sweetening plants. In this research, MEA wastewater generated from PETRONAS Fertilizer Kedah Sdn. Bhd (PFK) was treated via AFC99 tubular thin film composite polyamide Reverse Osmosis (RO) membrane. The effect of operating parameter (transmembrane pressure (TMP), feed concentration and pH) towards permeate flux and MEA rejection were studied to obtain the optimum operating conditions. Experimental results showed that AFC99 membrane is able to reject MEA up to 98% when operated at TMP of 20 bars, feed concentration of 300 ppm and pH of 4. This work shows that the RO membrane was feasible and desirable to be used for removal of MEA contaminants from wastewater. Besides, the treated water fulfills the watering standards.

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