Development of Simple and Cost Effective Method for Arsenic(III) Removal

سال انتشار: 1393
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 547

فایل این مقاله در 8 صفحه با فرمت PDF قابل دریافت می باشد

استخراج به نرم افزارهای پژوهشی:

لینک ثابت به این مقاله:

شناسه ملی سند علمی:

JR_IJEE-5-3_008

تاریخ نمایه سازی: 7 آذر 1394

چکیده مقاله:

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.

کلیدواژه ها:

As (III) removal Shale sedimentary rock Heat treatment Langmuir isotherm Adsorption

نویسندگان

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