Development of Simple and Cost Effective Method for Arsenic(III) Removal
Publish place: Iranica Journal of Energy and Environment، Vol: 5، Issue: 3
Publish Year: 1393
نوع سند: مقاله ژورنالی
زبان: English
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JR_IJEE-5-3_008
تاریخ نمایه سازی: 7 آذر 1394
Abstract:
In the present study, eight locally available low cost adsorbents (raw and heat treated) have beenscreening for its capability to remove As(III). The shale sedimentary rock (SSR) was selected as a goodadsorbent based on high As(III) removal. The activation of adsorbent was carried out by heat (250 - 550°C) andacid treatment (0.1 - 1 M H2SO4) in order to chose the best treatment method for As(III) removal. Sorptionexperiments were conducted to examine the effect of initial As(III) concentration, contact time and initial pH onAs(III) removal by SSR. Results show that, only by heating the adsorbent at 500°C for 1h, 0.2 g of SSRadsorbent capable to reduce the residual As(III) concentration below than maximum concentration limit (10μg/L)for initial concentration from 100 to 700 μg/L and optimum pH ranges between 3 to 9 after 24 h of contact time.The adsorption data fits well with Langmuir isotherm and yielded Langmuir monolayer capacity of 0.987 mgAs(III)/g of SSR at pH 7. The SSR adsorbent has been successfully used for the removal of arsenic from sevenreal groundwater samples containing arsenic in the range of 20.2 to 697.34 μg/L with 86.73 to 97.86% removalefficiency.
Keywords:
As (III) removal Shale sedimentary rock Heat treatment Langmuir isotherm Adsorption
Authors
Nur Zulaikha Yusof
Department of Environmental Engineering, Faculty of Civil Engineering, Universiti Teknologi Malaysia, ۸۱۳۱۰ Skudai, Johor, Malaysia
Mohd Azraai Kassim
Department of Environmental Engineering, Faculty of Civil Engineering, Universiti Teknologi Malaysia, ۸۱۳۱۰ Skudai, Johor, Malaysia
Razali Ismail
Department of Chemistry, Faculty of Science, Universiti Teknologi Malaysia, ۸۱۳۱۰ Skudai, Johor, Malaysia
Abdull Rahim Mohd Yusoff
Department of Environmental Engineering, Faculty of Civil Engineering, Universiti Teknologi Malaysia, ۸۱۳۱۰ Skudai, Johor, Malaysia