Natural-based coagulants/flocculants as sustainable market-valued products for industrial wastewater treatment: a review of recent developments

Badawi, Ahmad K.; Salama, Reda S.; Mostafa, Mohamed Mokhtar M.

doi:10.1039/d3ra01999c

Cited by 80 publications

(16 citation statements)

References 102 publications

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“…These technologies are crucial in reducing the negative impact of pollution on the environment and human health. However, despite various treatment methods, their effectiveness varies, and they often have limitations such as low stability and high complexity [ 25 ]. In air treatment, several strategies, such as activated carbon adsorption and selective catalytic reduction, wet flue gas desulfurization (WFGD), and activated carbon injection (ACI), have been utilized to reduce the concentration of pollutants [ 26 , 27 ].…”

Section: Remediation Strategiesmentioning

confidence: 99%

Advancement in nanomaterials for environmental pollutants remediation: a systematic review on bibliometrics analysis, material types, synthesis pathways, and related mechanisms

Asghar,

Hussain,

Nguyen

et al. 2024

J Nanobiotechnol

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Environmental pollution is a major issue that requires effective solutions. Nanomaterials (NMs) have emerged as promising candidates for pollution remediation due to their unique properties. This review paper provides a systematic analysis of the potential of NMs for environmental pollution remediation compared to conventional techniques. It elaborates on several aspects, including conventional and advanced techniques for removing pollutants, classification of NMs (organic, inorganic, and composite base). The efficiency of NMs in remediation of pollutants depends on their dispersion and retention, with each type of NM having different advantages and disadvantages. Various synthesis pathways for NMs, including traditional synthesis (chemical and physical) and biological synthesis pathways, mechanisms of reaction for pollutants removal using NMs, such as adsorption, filtration, disinfection, photocatalysis, and oxidation, also are evaluated. Additionally, this review presents suggestions for future investigation strategies to improve the efficacy of NMs in environmental remediation. The research so far provides strong evidence that NMs could effectively remove contaminants and may be valuable assets for various industrial purposes. However, further research and development are necessary to fully realize this potential, such as exploring new synthesis pathways and improving the dispersion and retention of NMs in the environment. Furthermore, there is a need to compare the efficacy of different types of NMs for remediating specific pollutants. Overall, this review highlights the immense potential of NMs for mitigating environmental pollutants and calls for more research in this direction. Graphical Abstract

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Section: Remediation Strategiesmentioning

confidence: 99%

Advancement in nanomaterials for environmental pollutants remediation: a systematic review on bibliometrics analysis, material types, synthesis pathways, and related mechanisms

Asghar,

Hussain,

Nguyen

et al. 2024

J Nanobiotechnol

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“…The precipitate formed can occur due to the tannin of tamarind seeds, which helps the coagulation process. The tannin content in tamarind seed bio coagulant can bind organic compounds as proteins to form aggregates that are easy to precipitate (Badawi et al, 2023). In tamarind seed powder, carboxyl, hydroxyl, and amine groups in tamarind seed powder facilitate suspension attachment and expand the attachment area of previously formed flocs to create larger flocs (Kurniawan et al, 2022).…”

Section: Figure 2 Coagulation Processmentioning

confidence: 99%

Utilization of Tamarind Seed Biocoagulant as Learning Material for Water Purification Practicum in Colloidal System

Septiya,

Muna

2024

J. Prisma. Sains

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Discharging wastewater directly into the environment can harm nearby organisms. Efforts to increase environmental awareness, especially about sewage, can be started with educational activities. The study investigates the correlation between chemistry material and water purification using tamarind seed bio coagulant, assessing its feasibility for chemistry experiment design in schools. This research uses descriptive qualitative research. This study described data from observations of water purification using tamarind seedcoagulant, literature studies on chemistry practicum, and interviews with two chemistry teachers and two high school students.The results showed that the relationship between colloidal material and the experiment was to determine the types of products that contain colloidal systems in daily life and the properties of colloids. The results of the chemical parameter test revealed significant changes in the pH levels of river, laundry, and batik wastewater samples, with batik coloring waste showing the most significant changes. The organoleptic test results revealed significant changes in the color, odor, and sediment of batik dyeing wastewater. The protein in tamarind seeds can destabilize substances that cause turbidity. Based on literature studies and interviews, tamarind seed bio coagulant is feasible as a teaching material for chemistry practicum on colloidal system.

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“…1,2 Currently, the approaches to dye removal mainly depend on traditional biological, physical, and chemical techniques, such as precipitation, coagulation, adsorption, filtration, membrane separation, or biodegradation, but they are far from satisfactory, mainly due to cost control and harmless processing. [3][4][5][6] To solve this problem, different photocatalytic approaches are being developed to remove pollutants from wastewater, due to their potential to degrade and mineralize toxic organic dyes into less harmful compounds such as H 2 O, CO 2 , and NO 3 À . [7][8][9] Among the different possible photocatalysts, transition metal-based coordination compounds have given rise to diverse and flexible ways of promoting photocatalytic efficiency.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization, and photocatalytic activity for water remediation and hydrogen evolution of Zn(II) and Ni(II) bis(thiosemicarbazone) complexes

Burón,

Jiménez‐Gómez,

Calatayud

et al. 2024

Applied Organom Chemis

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The extensive industrial use of organic dyes causes large amounts of these substances to arrive at water sources, so nowadays, organic compound removal from fresh water is a major concern. The use of photocatalysts is an interesting approach to solving this problem, with coordination compounds playing an outstanding role. We report the selective synthesis and characterization of three new dissymmetric bis(thiosemicarbazone) ligands and their nickel(II) and zinc(II) complexes, which have been fully characterized by several techniques. The photocatalytic activity of the six complexes for methyl orange degradation was also evaluated. All the complexes can degrade this organic dye, although the photoefficiency of the nickel compounds is, in general, higher than for the zinc ones, as the degradation is faster and they do not reach a plateau. Density functional theory calculations show a clear dependence of the highest occupied molecular orbital (HOMO)–lowest unoccupied molecular orbital (LUMO) gap, as well as with the relative energies of these orbitals. On the other hand, the need for green fuels that do not produce the greenhouse effect is one of the major goals of modern life, and molecular hydrogen is one of the most promising ones. Considering the proven potential of bis(thiosemicarbazone) complexes to electrocatalyze H2 evolution recently reported in the literature, we also made some preliminary tests to investigate the potential of the nickel complexes to act as photocatalysts for water splitting. The results indicate that two of the complexes produce H2 in the conditions tested, so they could be used in the development of efficient photocatalytic systems for hydrogen evolution.

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Natural-based coagulants/flocculants as sustainable market-valued products for industrial wastewater treatment: a review of recent developments

Abstract: Practical implementation of large-scale treatment systems based on natural materials. MN-C/Fs are effective for treating industrial effluents and reprocessing spent materials sustainably.

Cited by 80 publications

References 102 publications

Advancement in nanomaterials for environmental pollutants remediation: a systematic review on bibliometrics analysis, material types, synthesis pathways, and related mechanisms

Advancement in nanomaterials for environmental pollutants remediation: a systematic review on bibliometrics analysis, material types, synthesis pathways, and related mechanisms

Utilization of Tamarind Seed Biocoagulant as Learning Material for Water Purification Practicum in Colloidal System

Synthesis, characterization, and photocatalytic activity for water remediation and hydrogen evolution of Zn(II) and Ni(II) bis(thiosemicarbazone) complexes

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