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Attajaree Smata. Performance of magnetic-modified sludge adsorbent for removal of chromate in aqueous solution. Master's Degree(Engineering Technology). Thammasat University. Thammasat University Library. : Thammasat University, 2017.
Performance of magnetic-modified sludge adsorbent for removal of chromate in aqueous solution
Name: Attajaree Smata
keyword:
Sludge utilization
;
Chromate
Abstract:
Chromium (VI) ion, an ordinary contaminant occurred in effluent from wide range industries, is known as a toxic to both plants, especially as a major cause of cancer, mutations and human diseases such as liver, skin and kidney malfunction. The objective of this study is to utilization sludge from water treatment process as a raw material for chromate adsorbent and investigate chromate adsorption performance of magnetic-modified sludge adsorbent (MSA) including adsorption kinetics and reusability of the adsorbent and study other parameters that may effect on adsorption process such as pH, temperature, time, adsorbent dose, initial chromate concentration, and competing ions. The characterization results of MSA confirmed that MSA has composite of magnetic particles distributed on sludge modified surface. Utilization of sludge with magnetic modification was shown successfully for chromate removal. An optimum molar ratio of MSA synthesis was 4:1 Ca2+/Al3+ (MSA41). The maximum adsorption capacities of MSA was 49.50 mg of chromate/g of MSA by the Langmuir adsorption isotherm model with regression coefficients (R2) of 1. Kinetic experiments showed that the removal reaction was following pseudo-second order reaction with k = 0.24 mg/ghours. The optimum dose and initial chromate concentration were 1.0 g/L and 50 mg/L, respectively. Adsorption efficiency of MSA was dependent on pH, in which the adsorption increased with decreasing pH values. The adsorption process was found to be increased with the increase of temperature from 4 to 45°C. The presence of different competitive anions, i.e., bicarbonate, sulfate, nitrate, chloride and phosphate ions significantly affected the chromate removal efficiency. The MSA can be reuse more than 8 times before its chromate removal efficiency dropped lower than 20% by using NaOH solution with 0.1M as eluent solution
Thammasat University. Thammasat University Library
Address:
BANGKOK
Email:
preserv@tu.ac.th
Name: Pakorn Opaprakasit
Role:
advisor
Created:
2017
Modified:
2021-04-20
Issued:
2021-04-20
วิทยานิพนธ์/Thesis
application/pdf
eng
DegreeName: Master of Engineering
Level: Master's Degree
Descipline: Engineering Technology
Grantor: Thammasat University
©copyrights Thammasat University
RightsAccess:
ใช้เวลา
0.035573 วินาที
Attajaree Smata
| Title | Contributor | Type |
|---|---|---|
| Performance of magnetic-modified sludge adsorbent for removal of chromate in aqueous solution
มหาวิทยาลัยธรรมศาสตร์ Attajaree Smata | Pakorn Opaprakasit | วิทยานิพนธ์/Thesis |
Pakorn Opaprakasit