Green synthesis of magnetic sodalite sphere by using groundwater treatment sludge for tetracycline adsorption

Zhu, Suiyi; Wu, Yuna; Qu, Zhan; Zhang, Leilei; Yu, Yang; Xie, Xiande; Huo, Mingxin; Yang, Jiakuan; Bian, Dejun; Zhang, Haifeng; Zhang, Lanhe

doi:10.1016/j.jclepro.2019.119140

Cited by 29 publications

(10 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 10 shows that the initial concentration of Clwas 3.75 g/L, which decreased to 3.17 g/L after 0.5 h of hydrothermal treatment and then gradually increased to 3.63 g/L as the hydrothermal treatment time extended to 6 h. These findings suggest that Clwas involved in the formation of akageneite. Akageneite has a tetragonal structure, in which the inner tunnels parallel to the c-axis of the tetragonal lattice are partially occupied by Cl -, Fand OH -28 for structural crystal stability 29,30 . When the hydrothermal treatment time was longer than 2 h, the in situ conversion of akaganeite to hematite occurred with the release of water molecules and Clin the tunnels 31,32 , which was in agreement with the release of Clin the conversion of akageneite to hematite (Fig.…”

Section: Recycling Of Cu/zn-bearing Particles After Fe Was Removed Fmentioning

confidence: 99%

High-purity recycling of hematite and Zn/Cu mixture from waste smelting slag

Huo

Song

Zhu

et al. 2020

Sci Rep

Self Cite

View full text Add to dashboard Cite

in this study, Zn/cu-bearing smelting slag was recycled via an integrated acid dissolution and hematite precipitation method. the slag was dissolved in nitric acid to generate an acid solution containing 23.5 g/L Fe, 4.45 g/L Zn and 2.81 g/L Cu, which was subjected to hydrothermal treatment with the addition of levulinic acid (LA). More than 99.95% of the initial Fe content was removed as hematite particles with diameters of approximately 200 nm, and the residual Fe concentration in the acid was 0.43 mg/L. The generated hematite contained 97.3% Fe 2 o 3 , 0.64% ZnO and 0.58% CuO. Greater than 99% of the initial Zn and Cu was retained in the acid and further precipitated as Zn/Cu-bearing solids by adjusting the solution pH to 9. The precipitated Zn/Cu-bearing solids contained 33.6% Zn and 21.7% Cu, whereas the Fe content was less than 0.2%. This paper is the first report of an environmentally friendly approach for recycling smelting slag without generating any hazardous waste.

show abstract

Section: Recycling Of Cu/zn-bearing Particles After Fe Was Removed Fmentioning

confidence: 99%

High-purity recycling of hematite and Zn/Cu mixture from waste smelting slag

Huo

Song

Zhu

et al. 2020

Sci Rep

Self Cite

View full text Add to dashboard Cite

show abstract

“…The typical peaks of quartz and boehmite were recorded at the curve of the sludge. The sludge XRD pattern showed a typical peak at 2 θ = 26.1° that belongs to quartz (JCPDS 46–1,045) 21 , 22 and two peaks at 2 θ = 38.2° and 63.6° that belong to boehmite (JCPDS 74–1895) 23 . Sludge impurities were also rechecked, and a valuable reference of the sludge composition 24 was cited.…”

Section: Resultsmentioning

confidence: 99%

Upcycling of Fe-bearing sludge: preparation of erdite-bearing particles for treating pharmaceutical manufacture wastewater

Wang

Ning

et al. 2020

Sci Rep

Self Cite

View full text Add to dashboard Cite

Groundwater treatment sludge is a type of solid waste with 9.0-28.9% wt.% Fe content and is precipitated in large quantity from backwash wastewater in groundwater treatment. The sludge is mainly composed of fine particles containing Fe, Si and Al oxides, such as ferrihydrite, quartz and boehmite. The Fe oxides mostly originate from the oxidation of ferrous Fe in groundwater, whilst the silicate/aluminium compounds mainly originate from the broken quartz sand filter in the backwash step. In general, the sludge is firstly coagulated, dewatered by filter pressing and finally undergoes harmless solidification before it is sent to landfills. However, this process is costly (approximately US$66.1/t) and complicated. In this study, groundwater treatment sludge was effectively recycled to prepare novel erdite-bearing particles via a one-step hydrothermal method by adding only na 2 S•9H 2 O. After hydrothermal treatment, the quartz and boehmite of the sludge were dissolved and recrystallised to sodalite, whilst ferrihydrite was converted to an erdite nanorod at 160 °C and a hematite at 240 °C. SP160 was prepared as fine nanorod particles with 200 nm diameter and 2-5 μm length at a hydrothermal temperature of 160 °C. Nearly 100% OTC and its derivatives in pharmaceutical manufacture wastewater were removed by adding 0.1 g SP160. The major mechanism for the removal was the spontaneous hydrolysis of erdite in SP160 to generate Fe oxyhydroxide and use many hydroxyl groups for coordinating OTC and its derivatives. This study presents a novel method for the resource reutilisation of waste groundwater treatment sludge and reports efficient erdite-bearing particles for pharmaceutical manufacture wastewater treatment. Fe-bearing sludge is common in the metallurgical and chemical industries 1-3. Sludge contains 6.2-33.6% Fe, in the form of ferrihydrite, hematite, magnetite and andradite, and impurity minerals, such as quartz, muscovite, albite and boehmite 1,4. In China, tons of sludge are dumped and uncovered in massive piles 2. When rain occurs, Fe may leach and contaminate the soil and nearby surface water 5. Through strict environmental regulations, sludge is commonly dewatered and solidified before it is transferred to a safety landfill, but this process is costly and complicated 2,6-8. Resource reutilisation of sludge is an alternative strategy to reduce pollution and disposal cost. Many approaches have been developed to recycle sludge as a building material 9 , catalyst 10 and adsorbent 3,4,6,11. Amongst these approaches, the conversion of sludge to adsorbent is the most effective and simple, and the produced adsorbents are widely used in the adsorption of heavy metals 4,6,12 and cationic organics 1,3,11,13,14. For instance, groundwater treatment sludge and flocculent iron mud are rich in ferrihydrite and are directly applied to adsorb heavy metals, such as Cu and Zn 15. Ferrihydrite is effectively converted to maghemite and magnetite via hydrothermal route or calcination with the addition of a reductant, such as glycol 11 an...

show abstract

“…S1 and S2 were hydrothermally treated in accordance with our previous method [26,27] with the replacement of NaOH by Na 2 S. In brief, S1 (1 g), Na 2 S•9H 2 O (2.4 g) and deionized water (30 mL) were mixed in a 50 mL Teflon vessel. Then, the vessel was sealed and heated at 180 • C for 10 h in a drying oven (DHG-9037A, Jinghong company, Shanghai, China) and water-cooled to below 25 • C. Finally, the blackish particles at the vessel bottom were collected, freeze-dried at −80 • C in a freeze dryer (FDU-2110, EYELA, Tokyo, Japan) overnight and denoted as SP1.…”

Section: Hydrothermal Conversion Of Sludgementioning

confidence: 99%

Upcycling of Electroplating Sludge to Prepare Erdite-Bearing Nanorods for the Adsorption of Heavy Metals from Electroplating Wastewater Effluent

Liu

Khan

Wang

et al. 2020

Water

Self Cite

View full text Add to dashboard Cite

Electroplating sludge is a hazardous waste produced in plating and metallurgical processes which is commonly disposed of in safety landfills. In this work, electroplating sludge containing 25.6% Fe and 5.5% Co (named S1) and another containing 36.8% Fe and 7.8% Cr (S2) were recycled for the preparation of erdite-bearing particles via a facile hydrothermal route with only the addition of Na2S·9H2O. In the sludges, Fe-containing compounds were weakly crystallized and spontaneously converted to short rod-like erdite particles (SP1) in the presence of Co or long nanorod (SP2) particles with a diameter of 100 nm and length of 0.5–1.5 μm in the presence of Cr. The two products, SP1 and SP2, were applied in electroplating wastewater treatment, in which a small portion of Co in SP1 was released in wastewater, whereas Cr in SP2 was not. Adding 0.3 g/L SP2 resulted in the removal of 99.7% of Zn, 99.4% of Cu, 37.9% of Ni and 53.3% of Co in the electroplating wastewater, with residues at concentrations of 0.007, 0.003, 0.33, 0.09 and 0.002 mg/L, respectively. Thus, the treated electroplating wastewater met the discharge standard for electroplating wastewater in China. These removal efficiencies were higher than those achieved using powdered activated carbon, polyaluminum chloride, polyferric sulfate or pure Na2S·9H2O reagent. With the method, waste electroplating sludge was recycled as nanorod erdite-bearing particles which showed superior efficiency in electroplating wastewater treatment.

show abstract

Green synthesis of magnetic sodalite sphere by using groundwater treatment sludge for tetracycline adsorption

Cited by 29 publications

References 54 publications

High-purity recycling of hematite and Zn/Cu mixture from waste smelting slag

High-purity recycling of hematite and Zn/Cu mixture from waste smelting slag

Upcycling of Fe-bearing sludge: preparation of erdite-bearing particles for treating pharmaceutical manufacture wastewater

Upcycling of Electroplating Sludge to Prepare Erdite-Bearing Nanorods for the Adsorption of Heavy Metals from Electroplating Wastewater Effluent

Contact Info

Product

Resources

About