Evaluation of Macroalgal Biomass for Removal of Hazardous Organic Dyes from Wastewater

Aziam, Rachid; Boukarma, Latifa; Abali, Mhamed; Nouaa, Safa; Eddaoudi, Elhassane; Sinan, Fouad; Chiban, Mohamed

doi:10.1007/978-981-16-3164-1_7

Cited by 10 publications

(1 citation statement)

References 71 publications

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“…The common methods to remove heavy metals from drinking water contain adsorption, ion exchange, membrane separation, reverse osmosis, and chemical precipitation, etc. − The adsorption method is widely favored by researchers because of its simple process, no toxic product formation, low cost, and reusability. − However, although the cost of traditional adsorption materials such as natural clay, macroalgal biomass, and zeolite is low, most of them have some shortcomings, − such as slow adsorption speed, low adsorption capacity, low specific surface area, lack of selectivity, and so on. Some new adsorption materials such as metal organic frameworks (MOFs) − and coordination organic frameworks (COFs) have greater porosity and specific surface areas than traditional materials and can quickly and selectively remove trace heavy metals from drinking water after modification and functionalization, but their practical applications are limited due to their harsh preparation conditions, high cost, or poor stability in a wide pH range.…”

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confidence: 99%

Functionalized Activated Carbon Fibers by Hydrogen Peroxide and Polydopamine for Efficient Trace Lead Removal from Drinking Water

et al. 2021

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To achieve efficient and selective trace heavy metals removal from drinking water, a low-cost purification material polydopamine/activated carbon fibers (PDA/H-ACF) was successfully prepared by polymerizing dopamine on the surface of activated carbon fibers pretreated with hydrogen peroxide. The morphology, phase, surface functional groups, specific surface, and pore size distribution of the as-prepared sample were analyzed using FESEM, XPS, BET and pore size distribution test (PST), and FTIR, and orthogonal experiments were used to investigate the influences of concentration of H 2 O 2 , pretreatment time, and reflux temperature on trace lead removal. The results showed that the sample pretreated under optimized conditions could produce different pore structures, and the content of functional group −COOH obviously increased. After further modification by polydopamine, the contents of −NH−, −NH 2 , and −OH functional groups on the surface obviously enhanced, which were beneficial to increase adsorption site and promote trace lead removal. The effluent lead concentration decreased from initial 150 to 3.18 ppb within 5 min, meeting the requirement of NSF International Standard/American National Standard for Drinking Water Treatment Units (NSF/ANSI 53−2020) (5 ppb). The isothermal adsorption process and adsorption kinetics could be well-fitted by the Langmuir isotherm and pseudo-second-order kinetics model, indicating that the adsorption process of trace lead by PDA/H-ACF belonged to monolayer and chemical adsorption. Moreover, the as-prepared PDA/H-ACF also showed superior trace lead adsorption performance in the presence of high concentration competitive metal ions, in a wide pH range and in tap water, and therefore had good application prospect in the field of drinking water purification.

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