PMID- 30622081 OWN - NLM STAT- MEDLINE DCOM- 20190610 LR - 20191210 IS - 1873-6750 (Electronic) IS - 0160-4120 (Linking) VI - 123 DP - 2019 Feb TI - Exploring the arsenic removal potential of various biosorbents from water. PG - 567-579 LID - S0160-4120(18)32066-X [pii] LID - 10.1016/j.envint.2018.12.049 [doi] AB - Globally, contamination of groundwater with toxic arsenic (As) is an environmental and public health issue given to its carcinogenic properties, thereby threatening millions of people relying on drinking As-contaminated well water. Here, we explored the efficiency of various biosorbents (egg shell, java plum seed, water chestnut shell, corn cob, tea waste and pomegranate peel) for arsenate (As(V)) and arsenite (As(III)) removal from As-contaminated water. Significantly, egg shell and java plum seed displayed the greatest As(III) elimination (78-87%) at 7 pH followed by water chestnut shell (75%), corn cob (67%), tea waste (74%) and pomegranate peel (65%). In contrast, 71% and 67% of As(V) was removed at pH 4.1 and 5.3 by egg shell and java plum seed, respectively. The maximum As(V) and As(III) sorption by all the biosorbents was obtained, notably for egg shell and java plum seed, after 2 h contact time. Langmuir isotherm and pseudo-second order models best fitted the sorption data for both forms of As. The -OH, -COOH, -NH(2) and sulfur-bearing surface functional groups were possibly involved for As(III) and As(V) removal by biosorbents. The scanning electron microscopy combined with the energy dispersive X-ray spectroscopy (SEM-EDX) analysis showed that the heterogeneous surface of biosorbents, possessing rough and irregular areas, could have led to As sorption. Both As(V) and As(III) were successfully desorbed (up to 97%) from the biosorbents in four sorption/desorption (regeneration) cycles. This pilot-scale study highlights that egg shell and java plum seed have the greatest ability to remove both As species from As-contaminated drinking water. Importantly, these findings provide insights to develop an inexpensive, effective and sustainable filtration technology for the treatment of As in drinking water, particularly in developing countries like Pakistan. CI - Copyright (c) 2018 Elsevier Ltd. All rights reserved. FAU - Shakoor, Muhammad Bilal AU - Shakoor MB AD - Institute of Soil and Environmental Sciences, University of Agriculture Faisalabad, Faisalabad 38040, Pakistan; Department of Environmental Sciences and Engineering, Government College University Faisalabad, Faisalabad 38000, Pakistan. FAU - Niazi, Nabeel Khan AU - Niazi NK AD - Institute of Soil and Environmental Sciences, University of Agriculture Faisalabad, Faisalabad 38040, Pakistan; School of Civil Engineering and Surveying, University of Southern Queensland, Toowoomba 4350, Queensland, Australia. Electronic address: nabeel.niazi@uaf.edu.pk. FAU - Bibi, Irshad AU - Bibi I AD - Institute of Soil and Environmental Sciences, University of Agriculture Faisalabad, Faisalabad 38040, Pakistan. Electronic address: irshad.niazi@uaf.edu.pk. FAU - Shahid, Muhammad AU - Shahid M AD - Department of Environmental Sciences, COMSATS University Islamabad, Vehari Campus. Vehari- 61100, Pakistan. FAU - Saqib, Zulfiqar Ahmad AU - Saqib ZA AD - Institute of Soil and Environmental Sciences, University of Agriculture Faisalabad, Faisalabad 38040, Pakistan. FAU - Nawaz, Muhammad Farrakh AU - Nawaz MF AD - Department of Forestry and Range Management, University of Agriculture Faisalabad, Faisalabad 38040, Pakistan. FAU - Shaheen, Sabry M AU - Shaheen SM AD - Department of Soil and Water Sciences, Faculty of Agriculture, University of Kafrelsheikh, 33516 Kafr El-Sheikh, Egypt; Laboratory of Soil- and Groundwater-Management, Institute of Foundation Engineering, Water- and Waste-Management, School of Architecture and Civil Engineering, University of Wuppertal, Pauluskirchstrasse 7, 42285 Wuppertal, Germany. FAU - Wang, Hailong AU - Wang H AD - Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province, Zhejiang A & F University, Lin'an, Hangzhou 311300, China; School of Environment and Chemical Engineering, Foshan University, Foshan 528000, China. FAU - Tsang, Daniel C W AU - Tsang DCW AD - Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China. FAU - Bundschuh, Jochen AU - Bundschuh J AD - UNESCO Chair on Groundwater Arsenic within the 2030 Agenda for Sustainable Development, University of Southern Queensland, West Street, Toowoomba, 4350, Queensland, Australia. FAU - Ok, Yong Sik AU - Ok YS AD - O-Jeong Eco-Resilience Institute (OJERI), Division of Environmental Science and Ecological Engineering, Korea University, Seoul 02841, Republic of Korea. FAU - Rinklebe, Jorg AU - Rinklebe J AD - Laboratory of Soil- and Groundwater-Management, Institute of Foundation Engineering, Water- and Waste-Management, School of Architecture and Civil Engineering, University of Wuppertal, Pauluskirchstrasse 7, 42285 Wuppertal, Germany; Department of Environment, Energy and Geoinformatics, Sejong University, 98 Gunja-Dong, Guangjin-Gu, Seoul, South Korea. LA - eng PT - Comparative Study PT - Evaluation Study PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20190107 PL - Netherlands TA - Environ Int JT - Environment international JID - 7807270 RN - 0 (Arsenates) RN - 0 (Arsenites) RN - 0 (Water Pollutants, Chemical) RN - 059QF0KO0R (Water) RN - N5509X556J (arsenite) RN - N712M78A8G (Arsenic) RN - N7CIZ75ZPN (arsenic acid) SB - IM MH - Adsorption MH - Arsenates MH - Arsenic/chemistry/*isolation & purification MH - Arsenites MH - Filtration MH - *Garbage MH - Hydrogen-Ion Concentration MH - Kinetics MH - Pakistan MH - Spectrometry, X-Ray Emission MH - Thermodynamics MH - Water MH - Water Pollutants, Chemical/*isolation & purification MH - Water Pollution/prevention & control MH - Water Purification/*methods OTO - NOTNLM OT - Arsenic contamination OT - Drinking water OT - Filtration materials OT - Groundwater OT - Health EDAT- 2019/01/10 06:00 MHDA- 2019/06/14 06:00 CRDT- 2019/01/10 06:00 PHST- 2018/09/12 00:00 [received] PHST- 2018/12/17 00:00 [revised] PHST- 2018/12/21 00:00 [accepted] PHST- 2019/01/10 06:00 [pubmed] PHST- 2019/06/14 06:00 [medline] PHST- 2019/01/10 06:00 [entrez] AID - S0160-4120(18)32066-X [pii] AID - 10.1016/j.envint.2018.12.049 [doi] PST - ppublish SO - Environ Int. 2019 Feb;123:567-579. doi: 10.1016/j.envint.2018.12.049. Epub 2019 Jan 7.