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Due to the presence of environmental problems, it is urgent to improve the processes aimed at the processing and purification of hydrocarbon-containing wastes and wastewaters.
NCs/NComs; Size (nm) [Reference] |
Pollutants | Reaction Conditions | Removal Efficiency (%) |
---|---|---|---|
Heterogeneous photocatalysis | |||
TiO2 (30 nm) [18] |
Phenol (300 ± 7 mg/L), soap oil and grease (SOG) (4000 ± 23 mg/L) in oil refinery wastewater | 8 g/L of catalyst, aeration flow rate of 1.225 L/min, 90 min | 76% of phenol and 88% of SOG |
TiO2 (44.3–48.0 nm) [19] |
Anthraquinone (0.5 mg/L) |
200 mg/L of catalyst, solar irradiation 100 mW/cm2, 240 min | 57% |
Haematite (α-Fe2O3) [20] | Petroleum refinery wastewater COD 1257 mg/L |
pH 7.5, 1.494 g/L of catalyst, H2O2/COD ratio of 1 mg/mg, UV-A lamp solar irradiation, 90 min |
90.85% of COD |
ZnO or NiO [13] | Anthracene (101.8 mg/L) |
pH 7.2, 55.6 mg/L of catalyst, emulsion solution—230 min, anthracene aqueous ethanol solution—280 min | 90% with ZnO and 87% with NiO for anthracene emulsion solution; 81% with ZnO and 86% with NiO for anthracene aqueous ethanol solution |
ZnO nanorods 2.11 ± 0.32 μm length and 96.26 ± 11.13 nm diameter [21] |
Phenol (10 mg/L) |
pH 5, visible light 1000 W/m2, 5 h |
84.3% |
ZnO/SiO2 with Palash leaves extract (3–35 nm) [22] |
Acenaphthylene (176 mg/L), COD (497 mg/L) in petrochemical wastewater | 1 g/L of catalyst, 30 °C, visible light, 4 h |
79% of Acenaphthylene, 70% of COD |
HS-CuS-HNCs Hierarchically structured CuS hollow nanocatalyst [12] |
Petroleum refinery wastewater (COD 380 mg/L) |
pH 7.6, 1 g/L of catalyst, 180 min, 10 cycles |
about 66% of COD |
TiO2@ZnHCF Titanium dioxide based zinc hexacyanoferrate framework nanocomposite (100 nm) [23] |
Tricyclic PAHs: acenaphthene, phenanthrene and fluorine (2 mg/L) |
Neutral pH, 15 mg/L of catalyst, sunlight, 6 h | 93–96% from water, 82–86% from soil, 81.63–85.43% from river sediment |
Fe3O4/Cu2O-Ag nanocomposite (5 nm) [24] | PAHs: naphthalene (5 mg/L), benzo(a)pyrene (5 mg/L), anthracene (5 mg/L) | 0.5 g/L of catalyst, visible light, 60–180 min | 80–90% |
MIL-101(Cr)/Fe3O4-SiO2 (35% of Fe3O4-SiO2) Superhydrophobic composite (400/80–120 nm) [14] |
Synthetic and real oilfield-produced water (TPH 170 mg/L, COD 550 mg/L) | pH 4, 0.5 g/L of catalyst, visible and UV light, 150 min | 97.7% and 99.2% of TPH, 95.17% and 96.6% of COD from real and synthetic OPW, respectively |
Fenton-like oxidation process | |||
Nanoscale zero-valent iron (nZVI), commercial (50 nm) [25] |
Water from oil and gas exploration site (15 different PAHs present in real water samples; Naphthalene (201.46 μg/L) and benzo(g,h,i) perylene (23.15 μg/L) |
pH 2.94, 4.35 g/L of nZVI, 1.60 g/L of H2O2, 199.90 min |
89.5% and 75.3% of PAHs and COD, respectively |
MgAl-LDH@Fe3O4 [26] | Concentrated liquor of gas field wastewater (refractory organic pollutants) | pH 5, heterogeneous electro-Fenton system, 4 h | 88.18% for COD |
Cl/S-codoped carbon nitride nanotube clusters (Cl/S-TCN) [27] | Oilfield-produced water | pH range 3–9, metal-free photo-Fenton, 10 mM H2O2 | 82.6% for COD |
Ozonation | |||
CuO/Activated carbon (250~350 nm) [28] |
Heavy oil refinery wastewater (oil 78 mg/L, COD 2950 mg/L) | pH 7.3, 5.0 g of catalyst, 90 mg/L of O3, 75 min |
94.2% of COD 89.7% of oil |
Sulfate radical-based oxidation | |||
OMS-2 Manganese oxide octahedral molecular sieve nanorods [29] |
PAH: phenanthrene (1.0 mg/L) in water and sewage | pH range 4–11, 0.1 g/L of catalyst, peroxomonosulfates 6 mmol/L, room temperature, 360 min, 3 cycles |
>99%, 68%, 82% and 79% from model wasterwater, tap water, Yellow river and Qinghai lake, respectively |
Hybrid chemical processes with nanocatalysts | |||
HS-CuS-HNCs Hierarchically structured CuS hollow nanocatalyst [12] |
Petroleum refinery wastewater (COD 380 mg/L) |
Heterogeneous photocatalysis/H2O2 pH 7.6, 1000 mg/L of catalyst, 3000 mg/L of H2O2, room temperature, solar-light, 2 h |
98% of COD |
M.MIL-100(Fe)@ZnO [30] | Phenol (5 mg/L), Biphenol A (5 mg/L), Atrazine (5 mg/L) |
Heterogeneous photocatalysis/H2O2 pH 2, 0.2 g/L of catalyst, 10 mM H2O2, room temperature, 2 h |
95% of Phenol, 95% of Biphenol A, 85% of Atrazine |
CuO/ZrO2 nanocomposite 40.32 nm [31] |
Marine diesel (100 mg/L) |
Heterogeneous photocatalysis/H2O2 0.5 g/L of catalyst, 400 °C, 0.3 g/L of H2O2, visible light, 6 h |
96.96% |
Cu-based perovskite oxides (La2CuO4) [32] | Petroleum refining wastewater (COD 3800 mg/L TOC 1259 mg/L) |
Wet air oxidation processes/H2O2 pH 7.5–8.0, 0.75 g/L of catalyst, 7 mL/L of 30% H2O2, 100 ℃, 0.5 h |
89.58% of COD, 87.38% of TOC |
Biocatalyst [Reference] | Pollutants | Conditions and Degradation Efficiency |
---|---|---|
Homogenous BCs | ||
Achromobacter xylosoxidans [33] | Pyrene 100 mg/L | pH 7–9, 37–40 °C, 0–2.5% NaCl, 15 days, 50% of of pyrene |
Halomonas shengliensis [34] | Pyrene 50 ppm | 25 °C, 10 g/L NaCl; 50% degradation |
Penicillium sp. [35] | Crude oil 1% (v/v) | 14 days, 30 °C; 57% degradation |
Chlorella vulgaris [36] | Oilfield-produced water (7 mg total hydrocarbons/L) and crude oil (32 mg total hydrocarbons/L) | 5 days, 20 °C; 36.8 ± 4.2 μmol photons/m2/s 28.5% degradation from oilfield-produced water; 34.3% degradation from crude oil |
Rhodocccus erythropolis or Pseudomonas stuzeri [37] | PAHs (332.2 mg/kg soil) |
Slurry Bioreactor, 28 °C, pH 8.2; 8 mg/L dissolved oxygen, 15 days, 70–80% degradation |
Brevibacillus brevis [38] | Naphthalene and pyrene (100 mg/L) |
pH 5.0, 25 °C, 18 days, 80% of naphthalene |
Proteus mirabilis [38] | pH 5.0, 25 °C, 18 days, 94% of naphthalene | |
Rhodococcus quinshengi [38] | pH 5.0, 37 °C, 18 days, biodegradation: 94% of naphthalene, 56% of pyrene |
|
R. ruber Ac-1513 D and R. erythropolis Ac-1514 D [39] |
Petroleum hydrocarbons 446.7–526.8 g/kg dry soil | Aerobic-anaerobic bioremediation method with 108 cells/mL; nitrate salt is used as electron acceptor on area 25 × 30 m2 3 times with a 3-week interval; 20–30 °C; 63 days; Degradation of saturated, aromatic and resin-asphaltene was 72.6%, 66.5% and 57.2%, respectively. |
R. ruber Ac-1513 D and R. erythropolis Ac-1514 D [40] |
Oil products 482 g/kg dry soil (48%) |
Hydrolysis of the bituminous crust by calcium hydroxide (2%) 3 times with a 3–4-day interval; bioremediation with Rhodococcus strains (106 cells/mL) was conducted 3 times with a 7-day interval; 20–30 °C, pH 7.8; 33 days for 26.4–48.2% degradation of oil pollution |
R. ruber Ac-1513 D and R. erythropolis Ac-1514 D [41] | Oil products 98 g/kg dry soil (9.8%) |
Anaerobic bioremediation, 109 cells/mL electron acceptor Ca(NO3)2; 1.25%, 28 °C, pH 7.8; 10 days; potential degradation of the oil pollution 90% for 90 days |
Extremophilic consortium: Ochrobactrum, Bacillus, Marinobacter, Pseudomonas, Martelella, Stenotrophomonas and Rhodococcus [42] | Low-molecular-weight (LMW) petroleum hydrocarbons (200 ppm) such as anthracene, phenanthrene, fluorene and naphthalene |
Soil, 8% salinity, pH 10, 60 °C, 8 days, 100% degradation efficiency |
High-molecular-weight (HMW) hydrocarbons such as pyrene (100 ppm), benzo(e)pyrene (20 ppm), benzo(k)fluoranthene (20 ppm) and benzo(a)pyrene (20 ppm) |
Soil, 8% salinity, pH 10, 60 °C, 8 days, 93%, 60%, 55% and 51% degradation |
|
Consortium: Campylobacter hominis, Bacillus cereus, Dyadobacter koreensis, Pseudomonas aeruginosa, Micrococcus luteus [43] | Bonny light crude oil | 2% (v/v) crude oil, 30 °C, 21 days 73% degradation |
Consortium of genus Pseudomonas, Methylobacillus, Nocardioides, Achromobacter, Methylophilaceae, Pseudoxanthomonas, Caulobacter [15] | The final concentration of total PAHs from coal and petroleum was 97.63 mg/ kg dry weight soil | 35 days, 25 °C, in soil; 75% PAHs |
Halophilic bacterial consortium [44] | PAHs | 12 days, pH 7.4, 40 g/L NaCl concentration low-molecular-weight (above 90% for phenanthrene and fluorene) and high-molecular-weight (69 ± 1.4 and 56 ± 1.8% at 50 and 100 mg/L of pyrene) polycyclic aromatic hydrocarbons (PAHs) |
Benthic diatom-associated bacteria [45] | 3 μg/L Benzo(a)pyrene and 265 μg/L fluoranthene | 7 days, 88% of fluoranthene, 79% of Benzo(a)pyrene |
Consortium: Aspergillus niger, Aspergillus sydowii, Fusarium lichenicola [46] |
101.7 mg/L PAHs in oilfield wastewater |
21 days, 85.2% degradation (with 100% naphthalene and chrysene) |
Consortium of Chlorella sp. and Rhodococcus wratislaviensis with preliminary adaptation [47] |
Mixture of 50 mg/L phenanthrene, 10 mg/L pyrene, 10 mg/L benzo[a]pyrene |
24 °C, 200 μmol photons/m2/s, 150 rpm, 21 days 100% degradation |
Nannochloropsis oculata or Isochrysis galbana with preliminary adaptation [48] |
Oilfield-produced water (270 mg oil/L) |
pH 7.2, 25 ± 1 °C, light photoperiod—18:6 (2000 lux); 66.5–68% degradation |
Immobilized BCs including self-immobilized systems (biofilms) | ||
Bacterial consortium immobilized in magnetic floating biochar gel beads [49] | Pyrene (20 mg/L), benzo(a)pyrene (10 mg/L), indeno(1,2,3-cd)pyrene (10 mg/L) |
Seawater, pH 8.1, 30 °C, 30‰ salinity, 16 days. Biodegradation: 89.8%, 66.9% and 78.2% of PYR, BAP and INP, respectively |
Biofilm and pellets of consortium (key functional genera: Rhodobacter, Citreibacter, and Roseovarius) [50] | Oilfield-produced water (6.38 ± 2.31 mg oil/L) |
multistage bio-contact oxidation reactor, pH 7.5–8.1, 45–50 °C, 44.07% oil degradation |
Microbial mats (cyanobacteria and bacteria) [51] | Oilfield-produced water (4.3 ± 1.0 mg of the C10 to C30 alkanes/g mats) |
28 days, 30 °C, 50 rpm, pH 8.5, 18 ppt salinity, with partially hydrolyzed polyacrylamide; 41–49% degradation |
Active sludge [52] | Synthetic produced water (255 mg oil/L) |
Aeration tank, 3.5 L/min air, pH 6.0, 7 days; 51 g/L sodium chloride, 99.01 ± 0.28% degradation |
This system contained dissolved air flotation (DAF), yeast bioreactor (yeast immobilized on policyurepan), upflow anaerobic sludge blanket reactor (UASB), and biological aerated filter [53] | Oilfield wastewater (145 mg oil/L) |
60 days, 99.6% oil degradation |
Native halophilic bacterial consortium immobilized on walnut shell [54] | Synthetic oilfield-produced water (191 mg/L oil) | 48 days, moving bed biofilm reactor, 97.8% oil degradation |
Methanogenic culture derived from a high-temperature oil reservoir production water [55] | Paraffinic n-alkanes (C22–C30) |
97% degradation and biogas accumulation, 736 days |
Consortium immobilized in cryogel of poly (vinyl alcohol): AC1 (80% anaerobic sludge plus 10% Desulfovibrio vulgaris plus 10% Clostridium acetobutilycum) for the straight-run gasoline fraction (Nafta) and AC3 (70% anaerobic sludge plus 10% D. vulgaris plus 10% C. acetobutilycum plus 5% Rhodococcus ruber plus 5% Rhodococcus erythropolis) for the straight-run diesel oil raction, non-hydrotreated vacuum gas oil, gas condensate, and crude oil [56] |
Sulfur-containing extracts from pre-oxidized crude oil, non-purified vacuum gas oil, straight-run gasoline fraction (Naphtha), gas condensate and straight-run diesel fraction (7–10 g/L COD) |
Biotransformation in methanogenic anaerobic reactor, 100% conversion of S-organic compounds to inorganic sulfide or biomass, biogas accumulation with 68–76% of CH4 for 20 days |
Consortium immobilized in cryogel of poly (vinyl alcohol): AC6 (80% anaerobic sludge plus 10% Rhodococcus opacus plus 10% Desulfovibrio desulfuricans) [57] |
Sulfur-containing extracts from pre-oxidized crude oil and oil fractions with hydrolysates of chicken manure and Chlorella vulgaris biomass (6.4–16 g/L COD) | Biotransformation in methanogenic anaerobic reactor, 100% conversion of S-organic compounds to inorganic sulfide or biomass, biogas accumulation with greater than 70% of CH4 for 6–42 days |
Consortium immobilized in cryogel of poly(vinyl alcohol): AC6 (80% anaerobic sludge plus 10% R. opacus plus 10% D. desulfuricans) and AC7 (90% adapted DEAMOX sludge plus 10% anaerobic sludge) [57] |
Sulfur-containing extracts from non-purified vacuum gas oil with hydrolysates of chicken manure and Chlorella vulgaris biomass (6.4 g/L COD) |
The two-stage biotransformation in methanogenic anaerobic reactor (MAR) and denitrifying ammonium oxidation (DEAMOX) reactor; 100% conversion of S-organic compounds to inorganic sulfide or biomass, biogas accumulation with 70% of CH4 for 20 days |
Combination of BCs with nanomaterials | ||
S. aestuarii 357 [58] | Naphthalene (0.128 mg/L) |
Two stages: (1) the formation of the naphthalene@FeNP-NDI-DA complex with FeNP-NDI-DA nanoparticals; (2) addition of S. aestuarii 357; 100% biodegradation |
Brevibacillus parabrev 1.13 × 108 cells/mL [59] |
Oily wastewater: Tetradecane 3% | Magnetic NPs of Fe3O4 (10 nm) 76% tetradecane was degraded by cells for 15 days |
Halamonas sp., Vibrio gazogenes or Marinobacter hydrocarbonoclasticus [60] | Crude oil (375 mg/L) | Polyvinylpyrrolidone (PVP)-coated iron oxide NPs (11.2 nm) 100% oil degradation for 24–48 h |
M. hydrocarbonoclasticus [61] | Crude oil (0.5% w/v) | Facile chemical modification of mesoporous silica NPs (mSNPs) (10 nm) 100% oil degradation for 45 days |
Bacillus cereus 1.55 × 105 cells/mL [16] |
PAHs: Anthracene, phenanthrene | Graphene oxide quantum dots (GOQDs) 52.7% degradation of PAHs for 3.5 days (1.7% degradation in control sample) |
Consortium in membrane bioreactor [62] |
Petroleum refinery wastewater (52.2 mg/L COD) |
Membrane bioreactor (MBR)-H2O2/UV Hybrid pretreatment before nanofiltration 80% of COD degradation for 1 h |
Pollutants [Reference] |
NCs/NCs; Size (nm) Physical or/and Chemical Treatment |
BC/Co-Substrate | Removal Efficiency (%) |
---|---|---|---|
Naphthalene, Phenanthrene, Anthracene, Fluoranthene, Pyrene (PAHs) in soil (200 mg/kg) [71] |
Ag3PO4@Fe3O4 UV-visible light photocatalyst (100–300 nm) |
Adapted consortium (sewage sludge) in microcapsules of Ca-alginate gel and carboxymethyl cellulose | 94% of PAHs mixture, ~100% of naphthalene, phenanthrene, anthracene, ~93% of fluoranthene, pyrene for 30 days |
Phenanthrene in water (PAH) [72] | Composite Mn3O4/MnO2-Ag3PO4 photocatalyst under visible light illumination |
Biofilms with Shewanella, Sedimentibacter, Comamonas, Acinetobacter and Pseudomonascells | 96.2% degradation for 20 min, 100% non-toxic intermediates for 10 h |
Phenanthrene in water [73] |
Cu/N-codoped TiO2 photocatalyst under UV or visible light illumination | PAH-degrading bacterial consortium with Pseudomonadaceae cells | UV (88.63% ± 0.71%) or visible light (62.87% ± 2.19%) from 10 mg/L for 6 h at room temperature; 9.31% ± 0.82% when only cells as BCs are used |
Pyrene (PAH) [74] | Cu/N-codoped TiO2 photocatalyst under visible or UV light illumination | PAH-degrading bacterial consortium | 63.89% ± 1.03% (Visual light biol. treatment) >61.27% ± 1.08% (UV biol. treatment) >59.58% ± 1.15% (UV) >57.41% ± 1.13% (Visual light) >6.65% ± 0.72% (biol. treatment) >1.70% ± 0.34% (control) |
Phenol, 4-chlorophenol (4-CP), and 4-fluorophenol (4-FP) [75] | N-doped TiO2 (30 nm) coated POHFs/combined UV and visible light | Microbial consortium: Scenedesmus obliquus (S. obliquus) biofilm with Rhodococcus and Pseudomonas cells |
The removals of DOC and COD of the phenolic compounds in mixture (1.06 mM phenol, 0.39 mM of 4-CP and 0.45 mM of 4-FP) for 11 h are ~98% and ~91%, respectively |
Toluene [70] | N-doped TiO2/PP | Microbial consortium |
99%, with the elimination capacity of 550 g/m3/h |
1,2,4 trichlorobenzene [76] | Sugarcane cellulose-TiO2 | Microbial consortium |
68.01%, which is 14.81% higher than that of biodegradation or photocatalysis alone, and the mineralization rate is 50.30%, which is 11.50% higher than that of photocatalysis alone |
Phenol (100 mg/L) [77] | CdS@SiO2@TRP nanocomposite photocatalyst under intermittent visible light irradiation | Adapted Pseudomonas putida cells |
Simultaneous removal 97.24% of phenol for 10 h |
Petroleum refinery wastewater [67] | Anatase nanocrystalline particles TiO2 (14 nm), catalyst concentration | Microbial consortium in Membrane Bioreactor, pH 10 | 100 mg/L of TiO2; 32% and 67% of TOC and TN for 90 min |
Benzene (100 mg/L), toluene(100 mg/L), and xylene (100 mg/L) [78] | Zinc sulfide (ZnS) nanoparticles (20–90 nm), UV-A light, 28 °C, pH 4 | Aspergillus niger | 100% for 1 h |