Treatment Of Industry Wastewater Research Articles

Application of renewable energy in sanitizer industry wastewater treatment through combined photo-Fenton and electro-Fenton processes

This study investigates the treatment of dyes AY36 and AB80 using photo-Fenton (PF) and Electro-Fenton (EF) systems, powered by an off-grid photovoltaic system. Employing PF (400 mg∙L-1 H2O2) with EF, degradation reached 71.47% and 85.64% at 436 and 624 nm. The introduced off-grid photovoltaic system ensured energy supply. Notably, a reduction of 53.56% in BOD and 9.90% in COD was observed in the analyzed effluent. The integrated of PF and EF, energized by a photovoltaic panel, not only demonstrated energy efficiency but also emphasized the sustainability of the treatment, aligning with environmentally friendly and renewable energy principles in wastewater treatment.

Tempeh Industry Wastewater Treatment using Mix Natural Adsorbents (Zeolite, Bentonite, Water Hyacinth-Activated Carbon): Effect of Mass Ratio and Dosage of Mix Adsorbents on Turbidity and pH

Adsorption is the process of agglomeration of dissolved substances in solution by the surface of an absorbent substance which makes the material enter and collect in an absorbent substance. Natural adsorbents that function to treat tempe liquid waste are zeolite, bentonite, and water hyacinth activated carbon. The purpose of this study was to determine the effect of the mass ratio and dose of natural adsorbents on the turbidity and pH values of tempe wastewater. The mass ratio variation used was the ratio of each material in the form of zeolite: bentonite: active carbon of water hyacinth in the form of R1 (1:1:1); R2 (2:1:1); R3 (1:2:1); and R4 (1:1:2). The adsorbent dose carried out was 1.5 gr; 3 grams; and 4.5 gr per 100 ml volume of liquid waste. The contact time between the adsorbent and the liquid waste is every 15, 30, 60, 90, 120, 150 minutes. Processing of tempe liquid waste was carried out in laboratory-scale batches with 120 rpm stirring. The analysis was carried out in form of turbidity, pH, COD, BOD, and TSS. The results showed that the adsorption was able to reduce turbidity and increase the pH level up to 99% by stirring the mass ratio R2 (2:1:1) for 150 minutes with a dose of 4.5 grams. It was found that the turbidity value decreased from 520.5 NTU to 2.47 NTU =ncrease in pH levels reaching 75% at 150 minutes of stirring at a dose of 4.5 grams. Decreased pH value from 3.7 to 6.4. The maximum adsorption capacity validation results were obtained based on the Frendulinch analysis of 7.07-49.75 mg/g with a Freundlich constant of 0.67-0.70 at a dose of 4.5 grams.

A Study on the Situation and Learnings of the Precipitant Shortage in the German Wastewater Sector

Wastewater treatment companies are particularly confronted by the energy and supply crisis resulting from the war in the Ukraine. More specifically, production and supply problems with precipitant production have shown that today’s wastewater treatment technology in Germany is not crisis-proofed and must become more resilient. The aim of this paper was to determine a required precipitant quantity for Germany with regard to chemical phosphorus elimination, as well as the expected shortfalls due to the shortage situation. Furthermore, possible solutions were identified for how the precipitant can be saved or substituted. Study surveys were conducted to gather data for a meaningful response regarding the operators (wastewater treatment plants, industry, and water suppliers), manufacturers, and the German federal states. A recommendation is given on what a path to more resilient wastewater management with a focus on phosphorus elimination could look like. Based on the data obtained, the report focused on wastewater engineering issues for wastewater treatment plants and industry. The results of the study are relevant for decision-makers, researchers, and operators in the wastewater sector in order to intervene in the market themselves if necessary, e.g., money for production or conversion to biological phosphorus elimination.

Pengolahan Air Limbah dengan Metode Koagulasi Flokulasi pada Industri Kimia

Utilities are one of the supporting processes in a factory, consisting of units providing water, steam, electricity, fuel procurement, compressed air, and wastewater treatment. Wastewater from industrial processes contains: toxic pollutants, organic and inorganic materials, also other industrial materials are toxic, mutagenic, and carcinogenic, so treatment is needed to overcome this. Wastewater treatment can use coagulation and flocculation methods. Coagulation is the process of adding chemicals to the water that causes the separation of particles to destabilize the particles and allow them to adhere to other particles (to remove) in the following process. Factors that can affect the success of the coagulation process include the type of coagulant used, coagulant dose, moving process, and pH. Meanwhile, flocculation removes water turbidity by collecting small particles into larger particles with the addition of chemical flocculants. The flocculants are divided into two, perikinetic flocculation and optokinetic flocculation. This article aims to determine the effectiveness of wastewater treatment in the chemical industry using the coagulation-flocculation method. The coagulation-flocculation process can reduce pollution of the aquatic environment so as not to aggravate cases of environmental pollution.

Isolation and identification of Chlorella sorokiniana HDMA-16 and its cultivation potential in flax retting wastewater

The utilization of microalgae for wastewater treatment presents a promising and cost-effective solution due to their ability to remove pollutants while simultaneously synthesizing biomass from wastewater nutrients. This research identified a novel strain of Chlorella sorokiniana and investigated its growth ability in flax retting wastewater (FRW), as well as its potential for FRW treatment. Chlorella sorokiniana HDMA-16 was inoculated into FRW, both with and without additional nutrient supplementation. The biomass, lipid content, and fatty acid profile of Chlorella sorokiniana HDMA-16 were determined, along with the changes in total nitrogen (TN), ammonia nitrogen (NH4+-N), total phosphorus (TP), and chemical oxygen demand (COD) in FRW. The results revealed that Chlorella sorokiniana HDMA-16 exhibited moderate growth in FRW without the need for additional nutrients. The strain achieved maximum biomass and lipid productivity levels of 785.7 mg L−1 and 151.5 RFU L−1 d−1. The lipid produced by Chlorella sorokiniana HDMA-16 displayed a favorable fatty acid profile, making the strain a potential candidate for the synthesis of by-products such as biodiesel. The removal rates of NH4+-N, TP, and COD in FRW reached a maximum of 26.86 %, 99.59 %, and 29.39 %. This study is significant in that it shows that the newly discovered Chlorella sorokiniana HDMA-16 can thrive in FRW and effectively remove pollutants. These findings provide a novel approach for FRW treatment and the large-scale cultivation of microalgae, offering promising prospects for sustainable wastewater treatment and microalgae-based industries.

The pH role in casein-carboxymethylcellulose nano/microparticles formation

Tuning the pH of colloidal dispersions formed by polymer chains can induce different self-aggregation of the particles, since their size and charges can be affected by the physicochemical properties of the systems. Nano- and microparticles formed by carboxymethylcellulose (CMC) and casein (CA) were prepared using the complex coacervation technique at different pH values (pH 4, 5, 6, and 7). The ratio of CA: CMC chains was 1:1 and 1:2, and non-crosslinked and crosslinked particles were obtained. The results showed that the pH and the polymer proportion played an essential role in the morphology, size, charge, rheological, and thermal behavior of the systems. CA: CMC 1:1 particle formed at pH 4 presented larger aggregates, while the CA: CMC 1:2 systems formed at this pH value presented smaller particles. In this scenario, the size, and charges of CA: CMC particles were especially influenced by the pH of the systems, giving by the relation to the colloidal stability of crosslinked and non-crosslinked systems. These results expand the understanding of the potential application of CA: CMC complex coacervates in the storage and controlled release of specific substances in aqueous medium, important for food, cosmetics, pharmaceutical, and wastewater treatment industries.

Sustainable treatment of boron industry wastewater with precipitation-adsorption hybrid process and recovery of boron species

Boron removal from wastewater has been investigated by using various processes, including ion exchange resins, membrane processes and adsorption. Each method has various advantages and disadvantages, but most produce excessive waste in addition to high operational costs. Therefore, more sustainable methods are required for wastewater containing high concentrations of boron. In this study, a sustainable treatment process was developed for wastewater containing high concentrations of boron. This study investigated the removal of boron from wastewater by Al(OH)3 sorption. The reuse of adsorbent (Al(OH)3) and the potential recovery of boric acid was the main goal of the study. It was observed that although lower concentrations of boron were obtained at pH 10.5 (980 mg/L and 635 mg/L at pH of 9.0 and 10.5, respectively), the amount of sorbed boron at pH 9 was substantially higher (94.7 mg B/g Al(OH)3 and 27.8 mg B/g Al(OH)3 at pH of 9.0 and 10.5, respectively). This was attributed to the higher initial boron concentrations and the formation of boric acid and polyborate complexes at pH 9.0. Results showed that polyborate species sorption was an outer sphere complex formation, which led to the desorption of boron as pH lowered. Adsorbed boron species to Al(OH)3 could effectively be desorbed at low pH values (pH<5.0); which allows Al(OH)3 to be used in successive adsorption studies. Approximately 55% of boron recovery from pretreated wastewater was possible with the effective reuse of adsorbent. A net profit of 2.85 $/m3 could be obtained based on the amounts of chemical consumptions and boron recovery.

Emerging Trends in Wastewater Treatment of Semiconductor Industry: A Review

The semiconductor industry produces a lot of wastewater. These wastewaters can affect the environment if they are not treated. As a result, one of the semiconductor industry’s primary concerns and duties is the treatment and disposal of wastewater from the industry. Many processes, including electrocoagulation, electro-adsorption, and coagulation-flocculation using both natural and synthetic coagulants, have been invented over the years for purifying semiconductor effluent. The long-term viability of this system is unknown although it generates solid by-products (sludge) and requires routine sludge disposal, both of which raise the operational expenses of effluent treatment. Thus, a sustainable alternative method of removing contaminants from the semiconductor industry is needed to advance toward pollution prevention and green innovation. The hydrodynamic cavitation technique has improved over time and is useful for treating water and wastewater. This article gives an insight into different wastewater technologies, so proper technology must be chosen.

Potential of aerobic granular sludge technology for domestic wastewater treatment of high ammonia from urea fertilizer industry

Fertilizer is the main element that has an essential role in the sector of agriculture. Urea fertilizer has a source of Nitrogen with 46.04%. Ammonia is a chemical complex that is used and produced from the processing of urea fertilizer. A specific domestic wastewater quality standard for industry explains that the maximum level of ammonia allowed in effluent water was 10 mg/l. In the urea fertilizer industry wastewater treatment results were found to be in the range of 19.49 - 42.4 mg/l. Activated sludge technology is considered fairly effective in wastewater treatment but requires a large amount of energy and additional land for handling excess sludge. From the disadvantages, it is necessary to conduct research related to the effectiveness of high ammonia wastewater treatment that is environmentally friendly. Aerobic granule is characterized by a compact and dense structure, high biomass residence time, resistance to shock loading and toxic compounds, and a high settling speed so that it can produce a compact reactor design. Aerobic granule allows ammonia removal to reach more than 97%. This article aims to review the potential of implementing the use of aerobic granular sludge technology for ammonia removal in the wastewater of the urea fertilizer industry.

Making waves: Magneto-responsive membranes with special and switchable wettability: new opportunities for membrane distillation

Membrane distillation (MD) has promising potential in the water purification and wastewater treatment industries; however, fouling and wetting are the main obstacles to its commercialization, and higher fluxes and energy efficiencies are essential. Magneto-responsive membranes (MagMem) with integrated magnetic nanoparticles (MNPs) enable in situ fouling mitigation and switchable separation by nano-mixing or nano-heating, triggered by external magnetic fields, in a range of membrane processes, but not yet been demonstrated in MD. This perspective discussed the potential paths of MagMem utilization in MD based on the research status and dilemmas of MD. It can be envisioned that MagMem will lead to a paradigm shift in MD, especially by in situ fouling/wetting mitigation and enhancing energy efficiency via in-place actuation and localized heating by MNPs. Moreover, remotely controllable pore tuning and specific or switchable wettability can also be anticipated. Overall, MagMem provides attractive opportunities for advanced robust and efficient MD.

Synthesis of S-type heterostructure π-COF for photocatalytic tetracycline degradation

Photocatalytic oxidation is a promising technology for wastewater treatment. It is a more desirable method than other conventional wastewater treatment approaches due to its low cost, environmental friendly, and capability to completely degrade pollutants into environmentally safe products under appropriate conditions. Among some photocatalysts, covalent organic frameworks with high photoactivity are recognized as stable and feasible materials for this purpose. In this work, highly-effective photocatalyst of S-type heterostructure π-COF was successfully synthesized by using ultrasonic delamination treatment sp2c-COF nanosheets (sp2c-NS) and py-NH2-COF nanosheets (Py-NH2-NS) via a secondary solvent heating method. The preparation was initiated by synthesizing sp2c-COF and py-NH2-COF successfully adopting pyrene templates by solvothermal method. The study focused on physicochemical characterization and photocatalytic activity of π-COF. The photocatalytic ability of π-COF was carried out to degrade tetracycline under visible light. The results indicate that π-COF not only shows excellent photocatalytic activity for tetracycline degradation of 94.8 % at 90 min under visible light illumination, but also has good photocatalytic degradation performance at wide initial pH values, coexisting ions, and actual water sources. Surprisingly, it has excellent stability and recyclability, it can afford high oxidative degradation (87.3 %) even after 5 successive recycles. The degradation mechanism was discussed by various methods such as active species trapping experiment, electron paramagnetic resonance determination and related electrochemical analysis. In addition, the main degradation intermediate products and the possible pathways of TC degradation were detected and proposed according to LC − MS technology. This work provided a new strategy for the preparation of hetero-structured COF which could be served as an advantageous photocatalyst for the treatment of pharmaceutical industry wastewater.

High-Strength, Chemical Industry Wastewater Treatment Feasibility Study for Energy Recovery

This paper presents an experimental study on the treatment of industrial chemical wastewater with a high organic load; it is aimed at process cost optimization and possible energy and resources recovery. The facility generates five separate streams of liquid waste, which range in organic strength from practically nil to 400,000 mg/L, with individual flows ranging from 2 to 1400 m3/d. The combined strength and the flow of all the streams are approximately 1500 mg/L COD and 1500 m3/d, respectively; however, excluding the cleaner one (the cooling and condensation water), the maximum average COD concentration rises to 115,000 mg/L, at a flow of 16 m3/d. These wastes are currently trucked away for external processing, at a high cost. The aim of the study was to evaluate the feasibility of the onsite treatment of the facility’s waste streams with energy recovery and water reuse. Various approaches were examined, including anaerobic treatment for biogas recovery. The preliminary characterization, however, showed strong inhibition toward anaerobic biomass, and in particular to methanogenesis, induced by some waste components. Further testing led to the conclusion that stream segregation and separate processing could represent the most efficient approach for the management of the facility’s liquid discharges and the optimization of resources recovery. A final solution that maximizes treatment efficiency and resources reuse by combining separate aerobic and anaerobic treatment is proposed.

MECHANISM OF MEMBRANE FOULING IN HYBRID MEMBRANE PHOTOCATALYTIC REACTOR FOR PALM OIL MILL SECONDARY EFFLUENT TREATMENT

Palm oil mill secondary effluent (POMSE) is a byproduct of the biological treatment of palm oil mill effluent. This research aims to investigate the mechanism of membrane fouling in the treatment of POMSE using a hybrid membrane photocatalytic reactor (MPR). The effectiveness of MPR in POMSE treatment is currently limited due to membrane fouling on the membrane surface. This study focuses on understanding the various mechanisms of membrane fouling, including complete blocking, intermediate blocking, standard blocking, and cake filtration. The determination of each fouling mechanism is achieved through an analysis of normalized flux data employing the Wiesner and Aptel equation. The results demonstrate a high degree of model fitness (R2 = 0.9576) for MPR Run 3, confirming its effectiveness. Based on the (R2) values and the fitted parameter (Ks^(-1)), it is evident that, under varying pH levels, catalyst types, catalyst loading, and initial POMSE concentrations, the cake formation fouling mechanism prevails in MPR Run. In conclusion, this research holds promising potential for implementation in the wastewater treatment industry while ensuring compliance with environmental regulations.

Simultaneous production of polyhydroxybutyrate and biogas from paper mill sludge through sodium citrate-mediated disperser-induced phase separated pretreatment

Paper mill waste activated sludge is an excess sludge produced from the paper industry wastewater treatment plant. Because of the bulk nature, its disposal concerns both economic and environmental perspectives. However, it widely consists of organic components and is considered a major attraction for its valorization to produce bioenergy and valued products. During the bioenergy and valued product retrieval, the enzymatic hydrolysis got hampered due to the presence of exopolymeric substances and thus require proper pretreatment prior to the product recovery. The application of two different phases of pretreatment by removing the flocs in the first step and then followed by the cell disintegration by mechanical means helps in enhancing the organics efficiently in soluble phase. In this study, the upshot of sodium citrate mediated disperser disintegration on sludge from a paper mill was explored enhance enzymatic hydrolysis. Firstly, the floc deaggregation results at 0.05 g sodium citrate per g suspended solid with the maximum floc deaggregation degree of 89 %. Further, the consequence of disperser disintegration on the floc deaggregated sludge sample shows solid reduction and solubilization of 12.5 % and 17.5 %, respectively, higher than the disperser alone disintegration (9.57 % and 13.4 %). The anaerobic biodegradability assay shows the maximum biogas production of 174.3 mL/g of chemical oxygen demand while utilizing pretreated settled sludge as substrate. There was no accumulation of polyhydroxybutyrate using pretreated sludge supernatant. Thus, the phase-separated pretreatment by sodium citrate-induced disperser pretreatment is a suitable approach for enhancing hydrolysis during bioenergy recovery.

Synthesis and characterization of pectin-xanthate and their application in heavy metal and lignin enriched paper industry wastewater treatment

ABSTRACT Three grades of pectin xanthates (PX1, PX2, and PX3) have been prepared by the reaction of pectin with carbon disulfide (CS2) in an alkaline medium using NaOH, via the xanthation process. The percentage yield of prepared pectin xanthates has been found to be 87.06%, 90.38%, and 93.80% for PX1, PX2, and PX3, respectively. Prepared pectin xanthates and raw pectin were utilized for heavy metals (Cu(II) and Ni(II)) and lignin enriched paper industry wastewater (LEPIW) treatment. The removal percentage of pectin, PX1, P X2, and PX3 for Cu removal at optimum condition (adsorbent dose: 5.14 g/L, pH: 5 for Cu and 7 for Ni, optimum temperature: 50°C and time: 80 min for Cu(II) and 100 min for Ni(II)) has been found as 85%, 92.33%, 93.5%, and 94.66% and 76.66%, 89.44%, 91.66%, and 93.33%, respectively, for Ni removal. The LEPIW treatment efficacy for pectin, PX1, PX2, and PX3 has been found to be 54%, 77%, 83%, and 86% for the initial COD: 2000 mg/L, pH: 7, optimum temperature: 40°C in 105 min operation time. Adsorption isotherm studies suggest that Langmuir isotherm is most appropriate which indicates adsorption follows chemisorption. The adsorption capacities of PX1, PX2, and PX3 are found as 309.59, 352.11, and 380.22 mg/g for Cu(II) and 299.40, 315.45, and 328.94 mg/g and for Ni(II), respectively, which is very high in comparison with many other recent literature studies.

Assessment of novel hybrid treatment wetlands as nature‐based solutions for pharmaceutical industry wastewater treatment

AbstractThis study investigated the use of nature‐based solutions for treating real pharmaceutical industry wastewater in Jordan. A pilot‐scale hybrid treatment wetland (TW) equipped with local zeolite was employed, comprising a tidal flow TW and a horizontal subsurface flow TW. This system was efficient in treating pharmaceutical wastewater with removal efficiencies of 61.4%, 52.6%, 60.1%, and 61.9% for chemical oxygen demand, total phosphorus, total nitrogen, and NH4+‐N, respectively. The final effluent met Jordanian standards for the reuse of treated wastewater in irrigation (Class B). Five pharmaceuticals, namely, enrofloxacin, ciprofloxacin, ofloxacin, lincomycin, and trimethoprim, demonstrated nearly completed removal (93.6–99.9%). Moderated removal performances (59.2–68.2%) were observed for two compounds, flumequine and sulfaquinoxaline. However, three pharmaceuticals, namely, carbamazepine, diclofenac, and sulfadimidine, showed limited removal performances (1.1–20.5%). This study supported the feasibility of using nature‐based solutions for treating pharmaceutical wastewater and highlighted that future studies are required to optimize this strategy for removing a broader range of pharmaceuticals.

ABACO-2: a comprehensive model for microalgae-bacteria consortia validated outdoor at pilot-scale

Modelling microalgae-bacteria in wastewater treatment systems has gained significant attention in the last few years. In this study, we present an enhanced version of the ABACO model, named ABACO-2, which demonstrates improved accuracy through validation in outdoor pilot-scale systems. ABACO-2 enables the comprehensive characterization of microalgae-bacteria consortia dynamics, allowing to predict the biomass concentration (microalgae, heterotrophic bacteria, and nitrifying bacteria) and nutrient evolution. The updated version of the model incorporates new equations for nutrient coefficient yields, oxygen mass balance, and microorganism cellular decay, while significantly reducing the number of calibrated parameters, simplifying the parameter identification. Calibration and validation were performed using data from a 80 m2 raceway reactor operated in a semicontinuous mode over an extensive period (May to November, total of 206 days) at a fixed dilution rate of 0.2 day-1 (corresponding to 5 days of hydraulic retention time), where untreated urban wastewater was used as culture medium. ABACO-2 exhibited robustness, accurately forecasting biomass production, population dynamics, nutrient recovery, and prevailing culture conditions across a wide range of environmental and water composition conditions. Mathematical models are essential instruments for the industrial development and optimization of microalgae-related wastewater treatment processes, thereby contributing to the sustainability of the wastewater treatment industry.

Nanoparticle-assisted biohydrogen production from pretreated food industry wastewater sludge: Microbial community shifts in batch and continuous processes

Biohydrogen production from industrial waste has gained a significant attention as a sustainable energy source. In this study, the enrichment of biohydrogen production from pretreated dissolved air flotation (DAF) sludge, generated from food industry wastewater treatment plants, was investigated using SiO2@Cu-Ag dendrites core–shell nanostructure (NS). The effect of NS on the changes of the microbial community and biohydrogen yield was evaluated through batch and continuous tests. In batch mode, various nanomaterial doses were investigated with several concentrations ranging from 20 to 50 mg/L for hydrogen production using glucose as a substrate. The optimum core–shell NS amount was 40 mg/L, achieving a maximum H2 yield of 163 mL/g volatile solids (VS) compared to the control's 79 mL/g VS. However, 50 mg/L NS inhibited most bacteria in the sludge. The continuous experiment used a continuous stirring tank reactor (CSTR) with 40 mg/L SiO2@Cu-Ag core–shell NS and pretreated industrial sludge as substrate. The H2 yield increased to 115 L/kg VS compared to the control reactor's 89 L/kg VS. The gas analysis showed compositional proportions of 83 % H2, 7 % CO2, and 4.5 % methane, while the microbial community analysis indicated the development of hydrogen-producing species such as Clostridium. In conclusion, SiO2@Cu-Ag core–shell NS addition enhanced anaerobic degradation of organic matter and its conversion to biohydrogen. The selected nanomaterial can be used for an effective continuous treatment system for industrial sludge while promoting dark fermentation.

Biodegradability enhancement and sequential treatment of real chemical industry wastewater by chemical coagulation and Electro-Fenton processes

A sequential treatment with chemical coagulation in the first step and Electro-Fenton (EF) in the second step was applied to chemical industry wastewater. By coagulation using Poly Aluminum Chloride (PAC) as a coagulant, 57.5% chemical oxygen demand (COD), 96.8% total suspended solids (TSS), and 90.5% color index (CI) removal were obtained. In the EF process applied after chemical coagulation, the design parameters were optimized by the central composite design. Two quadratic models of the four factors were established with the COD and CI as two responses. Optimized conditions of the EF were pH 2.5, Fe2+ dose 5 mM, applied current 1 A, and reaction time 60 min. Under these conditions, the COD removal from the validation experiments was 63.5%. In total, 84.5% COD removal was achieved with the two-step treatment. By extending the reaction time in EF to ensure the discharge limits, 89.5% COD removal was reached, and the COD concentration decreased to 193 mg/L after 240 min. At the same time, the 5-day biochemical oxygen demand (BOD5)/COD ratio increased from 0.1 to 0.57 after 240 min. Consequently, the discharge limit was provided and the biodegradability was improved.

Sorption of cadmium, chromium, lead, and vanadium from artificial wetlands using Lemna aequinoctialis

The efficacy of the lesser duckweed, Lemna aequinoctialis (Welw.), to remediate varying concentrations of cadmium, chromium, lead, and vanadium from an organo-metallic contaminated media was tested in artificial surface wetland mesocosm experiment. A 100 g of fresh-weight duckweed was introduced into each of the mesocosm, except for the control setup and monitored for 120 days while the metals removal rate was quantified using an atomic absorption spectrometer. A time-dependent and partial sorption of metals was observed with the highest removal rate recorded for cadmium (71.96%), followed by lead (69.23%), vanadium (55.22%), and chromium (41.64%). The uptake and bioaccumulation of metals were reflected in the increased plant biomass (p < 0.05, F = 97.12) and relative growth rate (p < 0.05, F = 1214.35) in duckweed. A coefficient (r 2) of 0.951, 0.919, 0.970, and 0.967 was recorded for cadmium, chromium, lead, and vanadium respectively, indicating that the remediation of metals followed the first-order kinetic rate model. This study highlights the efficacy of the lesser duckweed to preferentially remediate metals in an organo-metallic complex medium for potential wastewater treatment in the petrochemical industry.