Aluminum leaching from water treatment sludge using hydrochloric acid and kinetic study

Mirwan, Agus; Putra, Meilana Dharma; Liu, Jhy‐Chern; Susianto,; Altway, Ali; Handogo, Renanto

doi:10.1007/s11356-020-08922-x

Cited by 5 publications

(2 citation statements)

References 38 publications

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“…In general, HCl is known to be the most effective reagent for metal dissolution compared to other acid chemicals, such as H 2 SO 4 and HNO 3 , because HCl is capable of a high degree of metal dissolution due to the high affinity of Cl − for metal elements. This impurity reduction caused by HCl solution is generated through the process of chemically reacting and dissolving with metal impurities, as is shown in Equations (4)–(6) [ 32 , 33 , 34 , 35 , 36 ]. FeOOH + 4HCl → FeCl 2 + 2H 2 O + Cl 2 Fe 2 O 3(s) + 6H + + Cl − → 2Fe 3+ + 6Cl − + 3H 2 O (l) Al(OH) 3(s) + 3HCl (aq) → AlCl 3(aq) + 3H 2 O …”

Section: Resultsmentioning

confidence: 99%

Fumed Silica-Based Ultra-High-Purity Synthetic Quartz Powder via Sol–Gel Process for Advanced Semiconductor Process beyond Design Rule of 3 nm

et al. 2023

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Fumed silica-based ultra-high-purity synthetic quartz powder was developed via the sol–gel process to apply to quartz wares and quartz crucibles for use in advanced semiconductor processes. The process conditions of preparing potassium silicate solution, gelation, and cleaning were optimized, i.e., the relative ratio of fumed silica (10 wt%) to KOH (4 wt%) for potassium silicate solution, gelation time 3 h, and cleaning for 1 h with 5 wt% HCl solution. It was observed that the gelation time strongly affected the size distribution of the quartz powder; i.e., a longer gelation time led to a larger size (d50) of the synthesized quartz powder: 157 μm for 2 h and 331 μm for 5 h. In particular, it was found that the morphology of the as-synthesized quartz powder greatly depended on the pulverizing process; i.e., the shape of quartz powder was shown to be rod-shaped for the without-gel-pulverizing process and granular-shaped with the process. We expect that the fumed silica-based ultra-high-purity quartz powder with an impurity level of 74.1 ppb synthesized via the sol–gel process is applicable as a raw material for quartz wares and crucibles for advanced semiconductor processes beyond the design rule of 3 nm.

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Section: Resultsmentioning

confidence: 99%

Fumed Silica-Based Ultra-High-Purity Synthetic Quartz Powder via Sol–Gel Process for Advanced Semiconductor Process beyond Design Rule of 3 nm

et al. 2023

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“…WTS in fact comprises a number of main chemical compounds those are silica oxide, aluminum oxide and iron oxide as the results of a coagulation-flocculation process, in which in chemical industry they can be functioned as an adsorbent, coagulant, and catalyst. WTS from the water treatment plant in Banjarmasin, South Kalimantan, Indonesia, as revealed by the results of research by Mirwan et al [1], covered 49.15% silica oxide (SiO2), which is not only abundant material in the earth's crust but also valuable as a multipurpose inorganic chemical compound either in gel, crystalline or in amorphous form. Moreover, silica oxide, in consideration to its porous structure with a enormous surface area, becomes one of the most frequently used adsorbents.…”

Section: Introductionmentioning

confidence: 99%

Potential of silica from water treatment sludge modified with chitosan for Pb(II) and color adsorption in sasirangan waste solution

Wicakso

Mirwan

Agustin

et al. 2022

CST

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Water treatment sludge (WTS) still contains a lot of silica oxide (SiO2) as much as 43.12-66.90% by weight and can act as an adsorbent to be applied to the treatment of Sasirangan wastewater. Silica extraction from WTS was carried out by microwave-assisted leaching, which - compared to conventional extraction - had several advantages including high extraction yields, fast, uniform, and more selective processing time. In addition, Sasirangan liquid waste is a by-product of the dyeing process of Sasirangan cloth, which still contains heavy metals in amounts exceeding the quality standard. This study aims to extract silica from WTS by microwave-assisted leaching process to synthesize silica modified by chitosan (Si-Kit) as an adsorbent to reduce Pb(II) from Sasirangan wastewater, and to obtain a kinetic model of the adsorption process. The silica from microwave-assisted leaching process (Si-MaL) and Si-Kit adsorbents were characterized using FTIR and SEM. The results showed that the dominant functional groups of Si-Kit included Si-O-Si, Si-O-C stretching vibrations, and stretching vibration of C=N showing that the condensation between aldehyde groups and amino groups occurred to form base after the addition of glutaraldehyde. The SEM images showed that Si-MaL and Si-Kit adsorbent obviously increased in particle size with the presence of visible particles of homogeneous granules and large pores. The removal efficiency percentage of Pb(II) and color occurred at 6% w/v adsorbent weight and 70 min was 87.20% and 61.87% respectively. Meanwhile, the adsorption kinetics of Pb(II) and color followed the zero order kinetics model at weight variation of 6%-w/v based on the value of R2 close to one and the adsorption capacity of Pb(II) ion and color were 12.01 mg g-1 and 467 mg g-1, respectively.

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Treatment of Hazardous Sludge from Water and Wastewater Treatment Plants

Zakaria,

Aziz,

Hung

et al. 2023

Handbook of Environmental Engineering

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Aluminum leaching from water treatment sludge using hydrochloric acid and kinetic study

Cited by 5 publications

References 38 publications

Fumed Silica-Based Ultra-High-Purity Synthetic Quartz Powder via Sol–Gel Process for Advanced Semiconductor Process beyond Design Rule of 3 nm

Fumed Silica-Based Ultra-High-Purity Synthetic Quartz Powder via Sol–Gel Process for Advanced Semiconductor Process beyond Design Rule of 3 nm

Potential of silica from water treatment sludge modified with chitosan for Pb(II) and color adsorption in sasirangan waste solution

Treatment of Hazardous Sludge from Water and Wastewater Treatment Plants

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