Low-Cost Efficient Magnetic Adsorbent for Phosphorus Removal from Water

Zhang, Liting; Dan, Hongbing; Bukasa, Orphe T.; Song, Linlin; Liu, Yin; Wang, Liang; Li, Jianjun

doi:10.1021/acsomega.0c03657

Cited by 24 publications

(7 citation statements)

References 47 publications

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“…Table 1 lists the specific surface area of each adsorbent used in this study. The specific surface area values determined experimentally correspond with the data in the literature [ 72 , 73 , 74 , 78 , 79 , 80 , 82 , 83 , 84 , 85 , 90 , 91 , 92 , 93 , 94 , 95 , 96 , 97 ].…”

Section: Resultssupporting

confidence: 80%

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Assessment of the Different Type of Materials Used for Removing Phosphorus from Wastewater

et al. 2021

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Reducing the costs associated with water management, improving water quality and the environment are fundamental requirements of sustainable development. Maintaining the optimal level of phosphorus has a direct impact on water quality and the biological system. Current methods used in tertiary wastewater treatment for phosphorus removal present several disadvantages that influence the final water processing cost. Therefore, it is essential for water quality and food safety to develop ecological, cheap and highly efficient materials. This study reported the first comparative assessment of three different types of materials (magnetic, semiconductors and composite) as environmentally friendly, cheap adsorbents for phosphorus removal from wastewater. Several experiments were done to investigate the influence of adsorbent type, dosage and contact time on the efficiency of the processes. The adsorption process was fast and equilibrium was reached within 150 min. We found that the phosphorus adsorption efficiency on of these materials was higher than the chemical method. The obtained results indicated that specific surface area directly influences the performance of the adsorption process. EDS analysis was used to analyze adsorbents composition and analyze the type and content of elements in the substrate before and after reaction with wastewater.

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Section: Resultssupporting

confidence: 80%

“…Nitrogen adsorption/desorption isotherms were recorded at 77K on a NOVA 2200 apparatus. The specific surface area was calculated by Brunauer–Emmett–Teller (BET) theory from multi-point regression in the 0.08–0.3 relative pressure range [ 85 , 90 , 91 ]. The results are shown in Table 1 .…”

Section: Materials Characterizationmentioning

confidence: 99%

Assessment of the Different Type of Materials Used for Removing Phosphorus from Wastewater

et al. 2021

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“…Figure 4 b shows the adsorption performance of Alg-Cu@GO@MOF-525 for TC at different pH values. When pH value is less than 3.3, TC mainly exists in the form of TCH 3 + , which not only forms competitive adsorption with H + but also has electrostatic repulsion due to protonation of oxygen-containing functional groups [ 41 ]. Experimental results also show that the adsorption performance is poor under such conditions.…”

Section: Resultsmentioning

confidence: 99%

Effective Removal of Tetracycline from Water Using Copper Alginate @ Graphene Oxide with In-Situ Grown MOF-525 Composite: Synthesis, Characterization and Adsorption Mechanisms

Chen

et al. 2022

Nanomaterials

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For nanomaterials, such as GO and MOF-525, aggregation is the main reason limiting their adsorption performance. In this research, Alg-Cu@GO@MOF-525 was successfully synthesized by in-situ growth of MOF-525 on Alg-Cu@GO. By dispersing graphene oxide (GO) with copper alginate (Alg-Cu) with three-dimensional structure, MOF-525 was in-situ grown to reduce aggregation. The measured specific surface area of Alg-Cu@GO@MOF-525 was as high as 807.30 m2·g−1, which is very favorable for adsorption. The synthesized material has affinity for a variety of pollutants, and its adsorption performance is significantly enhanced. In particular, tetracycline (TC) was selected as the target pollutant to study the adsorption behavior. The strong acid environment inhibited the adsorption, and the removal percentage reached 96.6% when pH was neutral. Temperature promoted the adsorption process, and 318 K adsorption performance was the best under experimental conditions. Meanwhile, 54.6% of TC could be removed in 38 min, and the maximum adsorption capacity reached 533 mg·g−1, far higher than that of conventional adsorption materials. Kinetics and isotherms analysis show that the adsorption process accords with Sips model and pseudo-second-order model. Thermodynamic study further shows that the chemisorption is spontaneous and exothermic. In addition, pore-filling, complexation, π-π stack, hydrogen bond and chemisorption are considered to be the causes of adsorption.

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“…Their substantial positive charge facilitates strong adsorption of phosphate anions, rendering them frequently utilized as phosphate removal adsorbents. 22 A novel kind of adsorption material is layered double hydroxides (LDHs), which are widely used in various neighborhoods, [23][24][25][26] especially used to remove anionic pollutants due to their rich species, controllable interlayer spacing, positive charge of laminates, and negative charge between the layers. [27][28][29] Upon calcination within the temperature range of 200-500 1C, the LDHs undergo a transformation where hydroxyl groups are gradually eliminated as water molecules, leading to an increase in specific surface area and pore volume.…”

Section: Introductionmentioning

confidence: 99%