Advanced removal of water NOM by Pre-ozonation, Enhanced coagulation and Bio-augmented Granular Activated Carbon

Mirnasab, Mohammad Amin; Hashemi, Hassan; Samaei, Mohammad Reza; Azhdarpoor, Abooalfazl

doi:10.1007/s13762-020-03039-7

Cited by 20 publications

(8 citation statements)

References 31 publications

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Section: Introductionmentioning

confidence: 99%

“…Nowadays, much progress has been made in industrial and agricultural development, which also brings water pollution caused by organic pollutants, heavy metal ions, fertilizers, pesticides, and antibiotic drugs, posing a serious hazard to aquatic living organisms and even humanity. 1 Water pollution due to discharged dye effluents from the textile industry is one of the major threats to the ecological system. Because of their color problem, high chemical oxygen degree (COD), nonbiodegradability, carcinogenicity, toxicity, and mutagenicity, organic dyes are hazardous materials that should be fully removed from textile effluents.…”

Section: Introductionmentioning

confidence: 99%

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Insights into the pH-Dependent Adsorption Behavior of Ionic Dyes on Phosphoric Acid-Activated Biochar

Wei

Zhu

et al. 2022

ACS Omega

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Activated biochar is a promising porous carbonaceous adsorbent material for organic pollutant removal, but it remains challenging to obtain high porosity and aromaticity through a simple and low-cost synthetic method. The common adsorption mechanisms of organic dyes on activated biochar should be further investigated in order to guide the synthesis of high-efficiency adsorbent materials. Here, we proposed a high-yield (up to 40 wt %) synthetic method of phosphoric acid-activated biochar from pomelo peel (PPC) with a high specific area of 877.3 m2/g through a facile thermal treatment at a relatively low temperature (250 °C). The specific activation mechanism of H3PO4 in the preparation of the adsorbent was investigated by a range of experiments and characterizations. The kinetic and isotherm experiments are also conducted to evaluate its dye adsorption behavior. According to the adsorption experiment results, PPC exhibits high saturated adsorption capacities for methyl orange (MO, 239.1 mg/g), rhodamine B (RhB, 2821.8 mg/g), methylene blue (MB, 580.5 mg/g), and crystal violate (CV, 396.6 mg/g) according to the Langmuir model. The maximum initial concentration of each dye solution for acquiring 90% removal efficiency is estimated to be 234.55 ppm (MO), 2943.8 ppm (RhB), 633.8 ppm (MB), and 423.6 ppm (CV) at 298 K with an adsorbent dosage of 1 g/L. The characterization results also indicate PPC has a complex synergetic mechanism for ionic dye adsorption behavior. This provides perspectives regarding PPC as a promising biochar adsorbent from biomass waste, which is probably useful for high-efficiency dye removal in water treatment.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Insights into the pH-Dependent Adsorption Behavior of Ionic Dyes on Phosphoric Acid-Activated Biochar

Wei

Zhu

et al. 2022

ACS Omega

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“…The majority of developing countries still depend on regular measurements, such as coliforms, pH, and residual chlorine, for their water quality monitoring. Micro pollutants, on the other hand, are a rising source of anxiety in the water supply system because they produce health and aesthetic issues such as color, smell, and biofilm proliferation in the water supply system (Mirnasab et al., 2021). To provide a wide range of colorfast, bright shades, synthetic dyes have been developed.…”

Section: Introductionmentioning

confidence: 99%

Application of low‐cost, eco‐friendly adsorbents for the removal of dye contaminants from wastewater: Current developments and adsorption technology

Laskar

Kumar

2022

Environmental Quality Mgmt

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The review study focuses on dye contamination of wastewater and adsorption approaches to achieve the lowest dye waste in wastewater discharge. The dyes require extensive use in several applications suited for commercial consumption, but the dyes are serious pollutants when dumped directly into water bodies without sufficient treatment. The review study briefly discusses the current methodologies carried out for the adsorption mechanism, the relevance of adsorption, and adsorption factors for the examined system. Langmuir and Freundlich isotherm models and a pseudosecond order kinetic model were found to properly represent dye uptake. To fully appreciate the molecular interactions between the adsorbent and adsorbate, additional study into theoretical dye adsorption modeling is necessary. As a low-cost adsorbent for dye treatment and the manufacturing of activated carbon, agricultural waste material in both its natural and modified forms is explored in this review article for its dye adsorption capabilities. The adsorption behavior and mechanism may be better understood by employing operational parameters, kinetics, and isotherm models, as described in this article. The initial concentration, pH, and temperature all play a function in the adsorption process and are discussed in depth.

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“…In recent years, with the continuous improvement of public environmental awareness, many countries and regions have formulated regulations to limit the emission of volatile organic compounds (VOCs). − The increasing emphasis on environmental protection is also driving the traditional oil-based paints and inks that generate a large amount of VOC to low-toxicity, no odor, noncorrosiveness, and flame-retardant water-based coatings and inks. , At present, the water-based coatings and inks based on polyacrylate latex resins have become the main product types, and they occupy a large share in the international market − and will continue to increase …”

Section: Introductionmentioning

confidence: 99%

Preparation of Adsorbent Based on Polyacrylate Latex Solid Waste and Its Application in the Treatment of Dye Wastewater

et al. 2022

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It is a great challenge to sustainably produce and apply water-based coatings and inks in terms of realizing the green resource utilization of polyacrylate latex solid waste (PLSW) and avoid its secondary pollution. In this paper, a kind of high value-added amphoteric ion-exchange resin (AIER) was prepared by using diethylenetriamine to amidate PLSW under the optimized conditions from a Box-Behnken design. Its adsorption and regeneration properties and the universality of the method were investigated. The results suggested that AIER possessed a high removal efficiency to anionic dyes, and the batch dye adsorption processes were endothermic and spontaneous, which is consistent with a pseudo-second-order kinetic model. The penetration adsorption capacities of AIER were recorded to be 987.08 mg/g for RR239 and 1037.75 mg/g for RB5 at the optimized operating conditions of column height = 6.4 cm, flow rate = 1 mL/min, and dye solution of 500 mg/L. They were more than 200 times larger than that of commercial activated carbon when the mixture composed of AIER particle and diatomite particle (filter aid agent) was used as a fixed-bed adsorbent. Zeta potential analysis results indicated that the good adsorption and regeneration performances of AIER were mainly attributed to the presence of amino and carboxyl groups in the molecular structure of AIER. Most importantly, this method possessed excellent practicability and universality for different types of PLSW from factory wastewater. The results provide a feasible method and theoretical basis for the green resource utilization of PLSW, and the goal of “waste control by waste” was fundamentally achieved.

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Advanced removal of water NOM by Pre-ozonation, Enhanced coagulation and Bio-augmented Granular Activated Carbon

Cited by 20 publications

References 31 publications

Insights into the pH-Dependent Adsorption Behavior of Ionic Dyes on Phosphoric Acid-Activated Biochar

Insights into the pH-Dependent Adsorption Behavior of Ionic Dyes on Phosphoric Acid-Activated Biochar

Application of low‐cost, eco‐friendly adsorbents for the removal of dye contaminants from wastewater: Current developments and adsorption technology

Preparation of Adsorbent Based on Polyacrylate Latex Solid Waste and Its Application in the Treatment of Dye Wastewater

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