Recent advances in polymer composite, extraction, and their application for wastewater treatment: A review

Saravanan, A.; Thamarai, P.; Kumar, Pradeep; Rangasamy, Gayathri

doi:10.1016/j.chemosphere.2022.136368

Cited by 29 publications

(8 citation statements)

References 131 publications

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“…Anionic, nonionic, and cationic polymers can be used for the flocculation process. If an over dosage with coagulants and/or flocculants was applied, it is possible to intervene in a particle charge reversal due to the adsorption of excess ions, and thus stable colloid particles are presented [60,92,96,[105][106][107][108][109][110][111][112][113][114][115][116][117][118][119][120][121][122][123].…”

Section: Coagulation-flocculation Technologies and Its Performances I...mentioning

confidence: 99%

The Use of Coagulation–Flocculation for Industrial Colored Wastewater Treatment—(I) The Application of Hybrid Materials

Zaharia,

Musteret,

Afrasinei

2024

Applied Sciences

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Polluting species released in industrial-colored effluents contaminate water, degrading its quality and persisting in the aquatic environment; therefore, it must be treated for safe discharge or onsite reuse/recycling to ensure a fresh water supply. This review has the principal goal of facilitating understanding of some important issues concerning wastewater (WW) treatment systems, mainly based on a coagulation–flocculation step, as follows: (i) the significance of and facilities offered by specialized treatment processes, including the coagulation–flocculation step as a single or associated step (i.e., coagulation–flocculation followed by sedimentation/filtration or air flotation); (ii) the characteristics of industrial-colored WW, especially WW from the textile industry, which can be reduced via the coagulation–flocculation step; (iii) primary and secondary groups of hybrid materials and their characteristics when used as coagulants–flocculants; (iv) the influence of different process operating variables and treatment regimens on the efficiency of the studied treatment step; and (v) the benefits of using hybrid materials in colored WW treatment processes and its future development perspectives. The consulted scientific reports underline the benefits of applying hybrid materials as coagulants–flocculants in colored textile WW treatment, mainly fresh, natural hybrid materials that can achieve high removal rates, e.g., dye and color removal of >80%, heavy metals, COD and BOD of >50%, or turbidity removal of >90%. All of the reported data underline the feasibility of using these materials for the removal of colored polluting species (especially dyes) from industrial effluents and the possibility of selecting the adequate one for a specific WW treatment system.

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Section: Coagulation-flocculation Technologies and Its Performances I...mentioning

confidence: 99%

The Use of Coagulation–Flocculation for Industrial Colored Wastewater Treatment—(I) The Application of Hybrid Materials

Zaharia,

Musteret,

Afrasinei

2024

Applied Sciences

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“…Besides, with the functions of immune-enhancing, gastrointestinal regulation and fat-reducing (Lv et al 2023), chitin resources seem to have a huge application potential in healthcare product industry. CDs are also found to be natural sorbents, available in removing toxic metals from water due to the structure and group interactions (Saravanan et al 2022).…”

Section: Introductionmentioning

confidence: 99%

Chitin extraction from crab shells by two-step fermentation with Lacticanttacllus pantarum and Pseudomonas aeruginosa

Zhou,

Yang,

Xing

et al. 2024

Preprint

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There are few reports on the extraction of chitin from crab shells using microbiological methods. In this work, the strain Lacticanttacllus pantarum (LA01) for demineralization (DM) and the strain Pseudomonas aeruginosa (PS01) for deproteinization (DP) were screened from soil, seawater, mud of aquaculture farm, seamount, marine cold spring, probiotic powders, etc. After optimizing the fermentation conditions, LA01 showed the highest activity under the conditions of 2% glucose, 1g crab shells of 18 mesh in 100mL system for 48h, while PS01 performed best with 0.5g crab shells of 60 mesh in 100mL system for 48h. chitin was extracted from crab shells using two-step fermentation method with two scheme: (i) LA01 followed by PS01; (ii) PS01 followed by LA01, and the products were analyzed by FTIR, XRD and SEM. Results showed that 97.55 ± 0.15% of DM and 73.49 ± 0.25% of DP were eliminated by inoculating PS01 followed by LA01. The strong connection between protein and chitin in the crab shells was speculated as the reason of protein residues. Similar structure was observed in the fermented product by the results of FTIR and XRD compared with commercial chitin, indicating the structure of α-chitin. The presence of porous and fibrous structures was observed in crab chitin by two-step fermentation using SEM. The fermentation broth acquired from LA01 contained with various organic acids, lactic acid mostly, with contents of 4238.65mg/L, along with 356.91mg/L acetic acid, which has potential application in inhibiting other bacteria pollution during fermentation.

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“…Flocculants form flocs through charge neutralization, bridging, or patching mechanisms . These mechanisms rely on the physicochemical interactions between the flocculant and the suspended particles, which are affected by the type of functional groups (e.g., sulfonate), charge density, shape, and molecular weight of the flocculant. − For synthetic polymers, the higher the molecular weight, the lower the solubility . Another objective of this work was to understand the chemical structure of the copolymers and their possible correlation with their interactions with particles in colloidal systems.…”

Section: Introductionmentioning

confidence: 99%

Generation of Sulfonated Lignin-Starch Polymer and Its Use As a Flocculant

2023

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This paper reports the polymerization of tall oil lignin (TOL), starch, and 2-methyl-2-propene-1-sulfonic acid sodium salt (MPSA), a sulfonate-containing monomer, in a three-component system to generate flocculants for colloidal systems. By utilizing the advanced 1 H, COSY, HSQC, HSQC-TOCSY, and HMBC NMR techniques, it was confirmed that the phenolic substructures of TOL and the anhydroglucose unit of starch were covalently polymerized by the monomer to generate the three-block copolymer. The molecular weight, radius of gyration, and shape factor of the copolymers were fundamentally correlated to the structure of lignin and starch, as well as the polymerization outcomes. The deposition behavior of the copolymer, studied by a quartz crystal microbalance with dissipation (QCM-D) analysis, revealed that the copolymer with a larger molecular weight (ALS-5) deposited more and generated more compact adlayer than the copolymer with a smaller molecular weight on a solid surface. Owing to its higher charge density, molecular weight, and extended coil-like structure, ALS-5 produced larger flocs with faster sedimentation in the colloidal systems, regardless of the extent of agitation and gravitational force. The results of this work provide a new approach to preparing a lignin-starch polymer, i.e., a sustainable biomacromolecule with excellent flocculation performance in colloidal systems.

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Recent advances in polymer composite, extraction, and their application for wastewater treatment: A review

Cited by 29 publications

References 131 publications

The Use of Coagulation–Flocculation for Industrial Colored Wastewater Treatment—(I) The Application of Hybrid Materials

The Use of Coagulation–Flocculation for Industrial Colored Wastewater Treatment—(I) The Application of Hybrid Materials

Chitin extraction from crab shells by two-step fermentation with Lacticanttacllus pantarum and Pseudomonas aeruginosa

Generation of Sulfonated Lignin-Starch Polymer and Its Use As a Flocculant

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