期刊
INTERNATIONAL JOURNAL OF PHYTOREMEDIATION
卷 21, 期 6, 页码 509-518出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/15226514.2018.1501340
关键词
Biomaterials; contamination; health risk; groundwater remediation; toxicity
资金
- Ministere des Affaires etrangeres et du developpement international Sous-direction de l'Enseignement superieur et de la Recherche France under Bio-Asie programe Arsenic assessment and removal from drinking water in Northern-Punjab Pakistan through buildi
- COMSATS University Islamabad, Vehari Campus
- International Foundation for Science. (IFS, Sweden) [W/5698]
- Higher Education Commission, Pakistan [6425/Punjab/NRPU/RD/HEC/2016]
In this study, column-scale laboratory experiments were performed to evaluate the arsenic (As) removal efficiency of different agricultural biowastes-derived biosorbents (orange peel, banana peel, rice husk) and biochar, using As-containing solutions and As-contaminated groundwater. All the biosorbents and biochar efficiently removed (50-100%) As from groundwater (drinking well water). Arsenic removal potential of biosorbents varied with their type, As concentration, contact time, and As solution type. After 1 h, the As removal efficiency of all the biosorbents was 100%, 100% and 90% for 5, 10, and 50 mu g/L As-contaminated groundwater samples, respectively; and it was 50%, 90%, and 90% for 10, 50, and 100 mu g/L As solutions, respectively. After 2 h, all the biosorbents and biochar removed 100% As from aqueous solutions except for 100 mu g/L As solution. This showed that the biosorbents and biochar could be used to reduce As contents below the WHO safe limit of As in drinking water (10 mu g/L). Fourier transform infrared (FTIR) spectroscopy indicated possible role of various surface functional moieties on biosorbents/biochar surface to remove As from solution and groundwater. This pilot-scale column study highlights that the biosorbents and biochar can be effectively used in remediation of As-contaminated groundwater, although the soluble salts in groundwater increased after treatment with biochar.
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