Degradation Of Doxycycline Research Articles

Enhanced Photocatalytic Degradation of Doxycycline over Titania under Visible Light

Enhanced Photocatalytic Degradation of Doxycycline over Titania under Visible Light

Activation of Persulfate by NiFe-Layered Double Hydroxides Toward Efficient Degradation of Doxycycline in Water

In recent years, the excessive use and improper disposal of antibiotics have led to their pervasive presence in the environment, resulting in significant antibiotic pollution. To address this pressing issue, the present study synthesized nickel–iron-layered double hydroxides (NiFe-LDHs) with varying molar ratios using a hydrothermal method, employing these LDHs as catalysts for the oxidative degradation of doxycycline, with peroxymonosulfate (PMS) serving as the oxidant. X-ray diffraction analysis confirmed that the synthesized NiFe-LDHs exhibited a hexagonal crystal structure characteristic of layered double hydroxides. Experimental results demonstrated that the catalytic efficiency of NiFe-LDHs increased with both the dosage of the catalyst and the concentration of PMS, achieving a high degradation efficiency for doxycycline at a catalyst concentration of 0.5 g/L. Furthermore, the catalytic performance was notably effective across a range of pH conditions, with the highest degradation efficiency being observed at a Ni–Fe molar ratio of 3:1. The activation of PMS by NiFe-LDHs for the catalytic degradation of pollutants primarily occurs through singlet oxygen (1O2), superoxide radicals (O2−·), and sulfate radicals (SO4−·). The study also proposed three potential degradation pathways for doxycycline, indicating that the final degradation products have lower environmental toxicity. This research offers novel approaches and methodologies for the treatment of antibiotic-contaminated wastewater.

PbWO4 improved the efficient photocatalytic adsorption and degradation of tetracycline and doxycycline by Cu2O

Cu2O/PbWO4 was prepared via a mechanical composite method, demonstrating that polyhedral Cu2O was deposited on coral-like and rod-shaped PbWO4. Cu2O/PbWO4 exhibited superior photoelectric performance compared to Cu2O and PbWO4, reaching a photocurrent and photovoltage reached of 0.0518 mA·cm−2 and 0.00133 V, respectively. Cu2O/PbWO4 achieved 92.4 % and 97.6 % tetracycline and doxycycline degradation within 60 min under visible light, respectively, and >83 % tetracycline degradation continued to be achieved after 5 cycles. The enhanced photocatalytic performance of Cu2O/PbWO4 compared to Cu2O was mainly attributed to the formation of heterojunctions, which increased the charge transfer rate, effectively improving charge lifetime and separation efficiency. The response surface experiments demonstrated that optimal tetracycline degradation (96.4 %) could be achieved using 37.5 mg·L−1 tetracycline and 18.3 mg Cu2O/PbWO4 at a solution pH of 7.1. Four possible tetracycline degradation pathways were proposed and 14 degradation intermediates were detected, which were further degraded into low-molecular-weight substances such as CO2 and H2O through further photocatalytic reactions.

Nanostructured NiCo2S4 immobilized on nickel foam as recyclable catalyst for activating peroxymonosulfate toward doxycycline degradation: Performance and mechanism

The existing powder catalysts used in sulfate radical-based advanced oxidation processes (SR-AOPs) commonly suffer from severe limitation due to the difficulty of recycling and inadequate exposure of the active site. In this work, spinel sulfide (NiCo2S4) was uniformly grown on 3D nickel foam (NF) through a one-step hydrothermal route for the activation of peroxymonosulfate (PMS) toward highly efficient degradation of doxycycline (DOX). Due to the synergistic effect of Ni and Co in the NiCo2S4, the NiCo2S4/NF (0.6 g/L) combined with PMS (3.0 mmol L-1) can promote a nearly complete degradation (98.2 %) toward 0.3 mmol/L DOX within 6 min. Density functional theory (DFT) calculations illustrated that the NiCo2S4/NF can adsorb PMS through a unique Ni-S-Co structure and “conducting bridge” mode of NF, accelerating the electron transfer from NiCo2S4/NF to PMS and the subsequent O-O bond cleavage. Especially, the Co/Ni dual-site enhanced the adsorption of PMS and promotes electron transfer to form surface-activated PMS complex (catalyst-PMS*), leading to the generation of surface-bound reactive oxygen species (ROS) on the NiCo2S4 surface. Quenching experiments and ESR tests demonstrated that radicals such as SO4•-, 1O2, •OH and surface-bound ROS play a vital role in DOX degradation. Moreover, the potential mechanism and pathway of DOX degradation are reasonably deduced by investigating and analyzing the intermediates with liquid chromatography-mass spectromsetry (LC-MS). Consequently, this study provides a deep insight on the systhsis of spinel sulfide and its intrinsic mechanism of PMS activation toward organic contaminant degradation.

Fabrication of 2D Rod Like Structure MoO3 Anchored on 2D Nitrogen Rich Sheet g-C3N5 for Improvised in Visible Light Absorption for Boosting Photocatalytic Degradation of Doxycycline

Fabrication of 2D Rod Like Structure MoO3 Anchored on 2D Nitrogen Rich Sheet g-C3N5 for Improvised in Visible Light Absorption for Boosting Photocatalytic Degradation of Doxycycline

Three-dimensional gel network structure of agarose interlayer dispersed Pd nanoparticles in copper foam electrode for electrocatalytic degradation of doxycycline hydrochloride

In this study, we successfully prepared palladium/agarose/copper foam (Pd/AG/CF) composite electrodes by utilizing the three-dimensional network structure agarose (AG), a green material derived from biomass, and homogeneously immobilizing palladium (Pd) atoms on a copper foam (CF) substrate through a facile route. The electrode showed excellent performance in the electrocatalytic degradation of doxycycline (DOX), with a high DOX degradation rate of 92.19 % in 60 min. In-depth studies revealed that palladium can form metal-metal interactions with the CF substrates, which enhances the electron transfer on the catalyst surface. In addition, the introduction of agarose effectively prevented the agglomeration of palladium nanoparticles. In addition, the hydroxyl functional groups in the molecular structure of agarose facilitate interactions between water molecules and the electrode interface through the formation of hydrogen bonds, thereby further enhancing the efficiency of the electrocatalytic reaction. In addition to good stability and reusability. Microbial toxicity test results show that the degraded wastewater has minimal impact on the environment. Also, possible degradation pathways of DOX were explored in this study. Finally, a novel continuous flow reactor was designed, featuring a unique design that ensures full contact between wastewater and the composite electrodes, thereby achieving continuous and efficient treatment of antibiotic wastewater.

Constructing interfacial electric field with rich oxygen vacancy modulated heterojunction FeVO4-MgZnAl LDH for enhanced photocatalytic degradation of doxycycline

FeVO4 nanorods were synthesized and integrated with plate-like MgZnAl layered double hydroxide (MZA LDH) using a combination of sonochemical coprecipitation and hydrothermal methods. The resulting FeVO4-MgZnAl LDH nanocomposites (NCs) were engineered to enhance photocatalytic performance through an S-scheme charge transfer mechanism. These NCs exhibited exceptional photocatalytic activity, achieving 93.7 % degradation of doxycycline (DXY) which is significantly outperforming its counterparts, FeVO4 (29.8 %) and MgZnAl LDH (49.8 %). Detailed analysis using scavenging tests and electron spin resonance (ESR) analysis confirmed that the photoexcited charges follow the S-scheme pathway, leading to the generation of hydroxyl (•OH) and superoxide (O2•⁻) radicals. This mechanism remarkedly improves the catalytic efficiency of FeVO4-MZA NCs with a kinetic rate constant of 4–9 times higher than those of its individual components. The photocatalyst's were comprehensively characterized using scanning electron microscopy (SEM), X-ray diffraction (XRD), UV–visible diffuse reflectance spectroscopy (UV–vis-DRS), photoluminescence (PL) spectroscopy, and electrochemical impedance spectroscopy (EIS). The FeVO₄-MZA NCs demonstrated remarkable stability and reusability, indicating their suitability for large-scale water treatment applications. Additionally, the non-toxic nature of FeVO4-MZA NCs, coupled with effective charge carrier separation and reduced recombination rates, establishes them as highly efficient photocatalysts for the removal of pharmaceutical contaminants from aquatic systems and paves a way for manufacturing innovation.

Synthesis, characterization, and photocatalytic properties of reed biochar/TiO2 composites

In this study, TiO2/biochar (TBC) materials were successfully synthesized by simple hydrolysis. The photocatalytic activity of the products was evaluated through the photodegradation ability of doxycycline (DC) in aqueous solution. Characterization shows that TiO2 nanoparticles are well dispersed on the biochar surface. The presence of biochar helped improve the specific surface area, narrow the band gap and enhance the optical absorption in the visible light region of TiO2. The TBC composite at TiO2/biochar mass ratio = 1/0.25 showed the highest photodegradation efficiency, about 3.77 times higher than pure TiO2. Kinetic studies showed that DC degradation followed an apparent first-order kinetic model with rate constant kapp = 2.66×10-2 min-1 at DC concentration of 7.0 mg/L. Research shows that TiO2/biochar material has great potential for treating antibiotic-contaminated wastewater.

Engineered design of MnFe2O4/CoNiFe-LTH/g-C3N4 heterocatalyst for doxycycline degradation via Fenton oxidation process: Optimization and mechanism

The removal of organic contaminants from waterways is vital to the ecosystem. A novel MnFe2O4/CoNiFe-LTH/g-C3N4 catalyst was synthesized via self-assembly preparation, and linked with H2O2 for the Fenton degradation of doxycycline (DXY). The MnFe2O4/CoNiFe-LTH/g-C3N4 was characterized using FTIR, XRD, XPS, VSM, SEM, TOC, GC–MS, and ICP-OES. Interestingly, the magnetically separable and high-stability catalyst achieved 89.11 % DXY degradation, and 69.30 % TOC removal efficiency within 60 and 120 min, respectively (at pH = 7.5, catalyst dosage= 0.01 g, H2O2 = 400 ppm, T = 20 °C, and DXY concentration= 100 ppm). In addition, the synergistic effect of metal cations (Co, Ni, Fe, and Mn) triggered Fenton degradation through a continuous closed cycle of electrons. A pseudo-first-order kinetic model also fitted DXY degradation with MnFe2O4/CoNiFe-LTH/g-C3N4. Furthermore, the radical pathway mechanism was confirmed with XPS before and after degradation, and with radical scavenging tests. The DXY degradation pathway was speculated by GC–MS analysis. Quantitative structure-activity relationship (QSAR) was applied to assess intermediates for developmental toxicity. The MnFe2O4/CoNiFe-LTH/g-C3N4 catalytic activity on H2O2 decomposition was determined via titrimetric analysis. Recycling tests and ICP-OES measurements were further used to investigate the catalyst's resilience and reusability. Besides, MnFe2O4/CoNiFe-LTH/g-C3N4 demonstrated a performance of 70 % over eight catalytic degradation runs with minimal metal leaching. Eventually, MnFe2O4/CoNiFe-LTH/g-C3N4 is a viable catalyst for breaking down organic contaminants in wastewater.

High-efficiency ternary CeO2/WO3/AC photocatalyst supported by biomass waste-derived activated carbon for efficient doxycycline photodegradation: Optimization of synthesis conditions and operational parameters

Herein, a stable and reusable photocatalyst based on activated carbon (AC) with varying CeO2/WO3 loadings is synthesized and optimized using Central Composite Design (CCD) with the intention of Doxycycline (DOX) degrading as an organic pollutant. Prepared optimum photocatalyst have been characterized through XRD, BET, FE-SEM, EDS-Mapping, TEM, FT-IR, and UV–Vis band gap analyses. Additionally, the effect of operational parameters including catalyst dosage (0.2–1.4 g.L−1), DOX concentration (10–50 ppm), irradiation time (20–140 min), and pH (2–10) on DOX degradation is investigated by CCD in order to highly-efficient DOX degradation. The best working condition shows an experimental degradation efficiency of 97.23%. Moreover, selected CeO2/WO3/AC photocatalyst remove 83.11% of COD from DOX solution. The h+ and •O2− radicals are found to be essential for the destruction of the DOX due to heir strong and nonselective oxidation characteristics. Furthermore, the stability of the selected photocatalyst observed after undergoing five degradation cycles.

Visible-light-driven photocatalytic degradation of doxycycline using TiO2/g-C3N4/biochar catalyst

Abstract TiO2/g-C3N4/biochar (TCNBC) catalysts were prepared by the hydrolysis method for the photocatalytic degradation of doxycycline antibiotic (DC), with biochar obtained from the pyrolysis of Phragmites australis. The catalysts were examined using scanning electron microscope (SEM), transmission microscopy (TEM), energy dispersive x-ray spectrometer (EDX), x-ray photoelectron spectroscopy (XPS), x-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), photoluminescence spectroscopy (PL), and ultraviolet-visible diffuse reflectance spectroscopy (UV–Vis DRS) and nitrogen adsorption/desorption. The photocatalytic activity results showed that the TCNBC catalyst exhibited higher catalytic activity than pure TiO2 or g-C3N4. Its peak catalytic activity, achieving a decomposition efficiency of 91.93% and a mineralization efficiency of 81.50%, can be attributed to the synergistic effect of biochar, TiO2, and g-C3N4. Even after four cycles of use, the catalyst still maintained relatively high activity for the degradation of DC. The photocatalytic degradation efficiency of TCNBC decreased from 91.93% to 86.30% after four recycling events.

Adsorption–photocatalysis synergy of reusable mesoporous TiO2–ZnO for photocatalytic degradation of doxycycline antibiotic

The potentials of mesoporous TiO2–ZnO (3TiZn) were explored on photocatalytic degradation of doxycycline (DOX) antibiotic, likewise the influence of adsorption on the photocatalytic process. The 3TiZn was characterized for physical and chemical properties. Stability, reusability, kinetic and the ability of 3TiZn to degrade high concentration of pollutant under different operating conditions were investigated. Photocatalytic degradation of DOX was conducted at varied operating conditions, and the best was obtained at 1 g/L catalyst dosage, solution inherent pH (4.4) and 50 ppm of DOX. Complete degradation of 50 ppm and 100 ppm of DOX were attained within 30 and 100 min of the reaction time, respectively. The stability and reusability study of the photocatalyst proved that at the tenth (10th) cycle, the 3TiZn is as effective in the degradation of DOX as in the first cycle. This may be attributed to the fusion of the mixed oxides during calcination. The 3TiZn is mesoporous with a pore diameter of 17 nm, and this boosts it potential to degrade high concentration of DOX. It was observed that the adsorption capacity of 3TiZn enhance the photocatalytic process. It can be emphasized that 3TiZn portrayed a remarkable catalyst stability and good potentials for industrial application.

Synthesis of a novel biomass waste-based photocatalyst for degradation of high concentration organic pollutants under visible light: Optimization of synthesis condition and operational parameters via RSM-CCD

Reducing electron-hole pair recombination rate under visible light and preventing α-Fe2O3/WO3 nanoparticle aggregation enhances the photocatalytic efficiency. Herein, a novel heterojunction-activated carbon-based photocatalyst (α-Fe2O3/WO3/AC) was successfully synthesized from Rosa Canina seeds and characterized by PL, EIS, Photocurrent, ESR, XPS, LC-MS, FTIR, XRD, SEM, EDS-map, TEM, and BET analyses. Investigating the influence of significant parameters, including impregnation ratio (1–5), activation temperature (400–600 °C), and α-Fe2O3/WO3 loading (10–90 wt.%) by RSM method resulted in optimal photocatalyst synthesis (50 wt.%: FeW/AC3–500) evidenced by its capability for doxycycline degradation. The maximum doxycycline degradation (98.01 %) was achieved under optimal conditions with a degradation rate constant of 0.03 min−1. Trapping experiments revealed that •OH and •O2− played crucial roles in photocatalysis. The possible doxycycline degradation pathway of (50 wt.%: FeW/AC3–500) photocatalyst is proposed. Based on the transient photocurrent measurements and EIS results, the 50 wt.% FeW/AC3–500 composite exhibited a significant enhancement in photocatalytic activity, which can be attributed to the efficient speed of electron-hole separation. Overall, an innovative approach was introduced to design an efficient AC-based photocatalytic process, which enhances the performance of wastewater treatment and environmental remediation.

Interfacial oxygen vacancy engineering and built-in electric field mediated Z-scheme In2O3/Ag3PO4 heterojunction for boosted photocatalytic doxycycline degradation

Doxycycline pollutants in environment seriously destroy the balance of ecological system. A Z-scheme In2O3/Ag3PO4 heterojunction is constructed by attaching Ag3PO4 nanoparticles on hollow In2O3 hexagonal prism structures for efficient degradation of doxycycline. The doxycycline (30 mg/L) removal rate by IAO-1 (mole ratio of In2O3:Ag3PO4 is 1:3, 1.0 g/L) reaches 99.7% under visible light irradiation. Degradation rates are almost unchanged after five cycles of degradation experiments, demonstrating the excellent reusability and stability of the IAO-1 photocatalyst. The photocatalytic degradation of doxycycline in different water matrices by IAO-1 shows excellent performance, which provides significant potential for practical applications. The experiments and DFT results demonstrate that the built-in electric fields in IAO-1 contribute to the charge transfer from Ag3PO4 to In2O3, leading to the formation of a Z-scheme heterojunction with high redox capacity. The hollow defect structure of IAO-1 effectively activates molecular oxygen to generate oxygen vacancies and induce 1O2 production through energy transfer, which promotes the attack of benzene rings and oxygen-containing groups in the molecular structure of doxycycline, leading to hydroxylation, demethylation, and ring-opening reactions. This work provides new ideas for constructing Z-scheme photocatalysts with oxygen vacancies and built-in electric fields for practical wastewater treatment.

Modeling of Mass Transfer and Reaction Kinetics in ZnO Nanoparticle Micro-Reactor Systems for AMX and DOX Degradation

This study aims to model the coupled phenomena of photocatalytic reaction and mass transfer in the degradation of Amoxicillin (AMX) and Doxycycline (DOX) using Zinc oxide (ZnO) nanoparticles within microreactor systems. The objective is to gain a comprehensive understanding of the dynamic interaction between the photocatalytic degradation kinetics and the mass transfer processes to optimize the conditions for efficient antibiotic removal from contaminated water. This involves characterizing the reaction kinetics via the Langmuir-Hinshelwood model, estimating the mass transfer coefficients, and analyzing the effects of axial dispersion to ensure the accurate determination of intrinsic kinetic constants and minimize mass transfer limitations. This study used a syringe pump to ensure a consistent flow of antibiotic solution into the microreactor. The results indicate that AMX reaches adsorption equilibrium more rapidly than DOX, corresponding to its faster photocatalytic degradation kinetics and higher final conversion rate (89% for AMX, 86% for DOX). The mass transfer coefficient (kd) was estimated using the Sherwood number, derived from three different models, with the constant Sherwood model best fitting the R1 microreactor data. An analysis of the Damköhler number (DaII) indicates that high flow rates minimize mass transfer limitations in the R1 microreactor, allowing the determination of near-intrinsic kinetic constants. On the contrary, at low flow rates, kinetic constants are apparent as a result of mass-transfer limitations. The study concludes that higher flow rates (≥ 10 mL/h) in the R1 microreactor are preferable to approach intrinsic kinetics and reduce mass transfer limitations during photocatalytic degradation of antibiotics. These findings underscore the potential of ZnO-based oxidation processes in treating antibiotic-contaminated water with optimized conditions, providing a pathway for efficient and sustainable wastewater treatment.

Synthesis of g-C<sub>3</sub>N<sub>4</sub>/biochar materials for photocatalytic degradation of doxycycline in aqueous solution under visible light irradiation

This study used reed biomass and urea as raw materials to produce biochar and g-C3N4 by pyrolysis under N2 atmospheric conditions at 400oC and 520oC, respectively. The g-C3N4/biochar materials were prepared by dispersing different masses of g-C3N4 onto the biochar surface and characterized by XRD, SEM, BET, FT-IR and UV-Vis-DRS methods. The photocatalytic degradation on doxycycline (DC) was investigated from the factors of pH and concentration. The characterization showed that g-C3N4 was well incorporated on the surface of biochar and increased the specific surface area of the material. The presence of biochar narrowed the band gap and increased light absorption at a wider wavelength range of g-C3N4. The composite of g-C3N4/biochar ratio of 2/1 presented the best performance, which is 2.38 times faster than g-C3N4 degrading DC. Kinetic studies showed that DC degradation followed pseudo-first-order kinetics with a determined rate constant kapp = 4,82×10-2 min−1 at a concentration of 5.0 mg/L DC. The study shows that the g-C3N4/biochar material has great potential in the treatment of antibiotic contaminated wastewater.

Elucidating doxycycline biotransformation mechanism by Chryseobacterium sp. WX1: Multi-omics insights

Doxycycline (DOX) represents a second-generation tetracycline antibiotic that persists as a challenging-to-degrade contaminant in environmental compartments. Despite its ubiquity, scant literature exists on bacteria proficient in DOX degradation. This study marked a substantial advancement in this field by isolating Chryseobacterium sp. WX1 from an activated sludge enrichment culture, showcasing its unprecedented ability to completely degrade 50 mg/L of DOX within 44 h. Throughout the degradation process, seven biotransformation products were identified, revealing a complex pathway that began with the hydroxylation of DOX, followed by a series of transformations. Employing an integrated multi-omics approach alongside in vitro heterologous expression assays, our study distinctly identified the tetX gene as a critical facilitator of DOX hydroxylation. Proteomic analyses further pinpointed the enzymes postulated to mediate the downstream modifications of DOX hydroxylation derivatives. The elucidated degradation pathway encompassed several key biological processes, such as the microbial transmembrane transport of DOX and its intermediates, the orchestration of enzyme synthesis for transformation, energy metabolism, and other gene-regulated biological directives. This study provides the first insight into the adaptive biotransformation strategies of Chryseobacterium under DOX-induced stress, highlighting the potential applications of this strain to augment DOX removal in wastewater treatment systems containing high concentrations of DOX.

Construction of p-n-p nano heterojunction through coupling La2O3, (BiO)2CO3 and Ag3PO4 for effective photocatalytic degradation of doxycycline: Insights into mechanism, pathway and intermediate toxicity evaluation

The present work is centred around the development of La2O3/(BiO)2CO3/Ag3PO4 (LBA), a p-n-p nano-heterojunction to photodegrade doxycycline under visible light irradiation. Here, ultrasonication assisted co-precipitation method was employed to synthesize the photocatalyst. The photocatalyst was characterized using different analysis such as SEM, TEM, elemental mapping, XRD, XPS, FTIR, Raman, BET, DRS, PL and EIS which confirmed the successful fabrication of LBA and their excellent ability to refrain the e−/h+ recombination owing to the construction of the heterojunction. LBA was found to degrade DOX by 91.75 % with the high mineralization of 87.23%. The impact of the reaction parameters influencing the photodegradation process including the concentration of the NCs and DOX, pH and the influence of the commonly present anions were studied. The stability and reusability of the LBA was assessed through subjecting it to four cycles of photodegradation of DOX. In addition, the recovered LBA was characterized through XPS and XRD analysis to confirm the particles stability and reusability. The active participation of the photogenerated charges and the reactive oxygen species were identified through the scavenging assay and ESR analysis. Further, GC-MS/MS analysis was performed to put forward a plausible photodegradation pathway. The toxicity of the end products as well as the intermediates was predicted through ECOSAR software.

Synergistic effect between adsorption and Fenton-like degradation on CoNiFe-LDH/ZIF-8 composite for efficient degradation of doxycycline

This study aimed to remove doxycycline (DC) from wastewater via a synergistic effect between adsorption and Fenton-like degradation processes. For this purpose, cobalt–nickel-iron-layered double hydroxide/zeolitic imidazolate framework-8 (CoNiFe-LDH/ZIF-8) was designed to have a continuous redox cycle between the transition metals of CoNiFe-LDH. Furthermore, a high adsorption capacity is provided mainly by ZIF-8, which also endows electrons to the reduced metals of LDH via zinc-oxygen-metal (Zn-O-M) bonds. The morphology, chemical structure, surface charge, and crystallinity of CoNiFe-LDH/ZIF-8 were investigated. The adsorption percentage of DC onto CoNiFe-LDH/ZIF-8 was estimated to be 45.62 %, while the degradation percentage reached 98.5 % after 90 min. The removal mechanism was proposed based on the experimental results, Zeta Potential, and X-ray photoelectron spectroscopy (XPS) analyses. In addition, Liquid Chromatography-Mass Spectrometry predicted the degradation pathways and the formed byproducts. Based on the promising reusability of CoNiFe-LDH/ZIF-8, it could be applied in industrial applications.

Graphene oxide decorated BiOI/CdS nanocomposite: An efficient ternary heterostructure for photodegradation and adsorption study of organic pollutants

This study presents a ternary heterostructure comprising graphene oxide (GO) decorated BiOI/CdS, as a highly effective candidate for both the photodegradation and adsorption of organic pollutants. The composite materials were synthesized through a facile solvothermal method. The structural and morphological characteristics of the synthesized materials were thoroughly analyzed using various analytical techniques. Photoluminescence (PL) spectral analysis of the photocatalysts emphasises the strong charge-carrier separations in ternary composites, which is the main requirement for enhancing degradation performances. The photocatalysts were utilized to remove the methylene blue (MB) and doxycycline (DC) from aqueous suspensions. The most effective ternary composite (GO/BiOI/CdS-x, x = 0.4 mmol CdS) resulted in 99.2% degradation of MB within 25 min and 83.7 % degradation of DC within 150 min of light exposure. Trapping experiments identified O2•- and h+ as the most active species in pollutant degradation. A Z-scheme mechanism, supported by Mott-Schottky plots, VB-XPS spectra, and active species observations, was proposed to elucidate degradation processes. Additionally, the GO/BiOI/CdS-0.4 ternary composite demonstrated impressive adsorption ability for MB, indicating its robust pollutant removal capability. The composite also demonstrated remarkable stability and an impressive ability to be reused, positioning it as a highly promising material for use in wastewater treatment.