Novel micro-structured carbon-based adsorbents for notorious arsenic removal from wastewater

被引:63
作者
Islam, Aminul [1 ,2 ]
Teo, Siow Hwa [3 ]
Ahmed, Mohammad Tofayal [1 ,2 ]
Khandaker, Shahjalal [4 ]
Ibrahim, Mohd Lokman [5 ]
Vo, Dai-Viet N. [6 ]
Abdulkreem-Alsultan, G. [7 ]
Khan, Abu Shamim [8 ]
机构
[1] Jashore Univ Sci & Technol, Dept Petr & Min Engn, Jashore 7408, Bangladesh
[2] Jashore Univ Sci & Technol, Clean Energy & CO2 Capture Lab, Jashore 7408, Bangladesh
[3] Univ Malaysia Sabah, Fac Sci & Nat Resources, Jalan UMS, Kota Kinabalu 88400, Sabah, Malaysia
[4] Dhaka Univ Engn & Technol, Dept Text Engn, Gzipur 1707, Bangladesh
[5] Univ Teknol MARA, Fac Appl Sci, Sch Chem & Environm, Shah Alam 40450, Selangor, Malaysia
[6] Nguyen Tat Thanh Univ, Ctr Excellence Green Energy & Environm Nanomat CE, 300A Nguyen Tat Thanh,Dist 4, Ho Chi Minh City 755414, Vietnam
[7] Univ Putra Malaysia, Fac Engn, Chem & Environm Engn Dept, Serdang 43400, Selangor, Malaysia
[8] Arsen Ctr, Asia Arsen Network, Benapole Rd, Pulerhat, Jessore, Bangladesh
关键词
Arsenic; Adsorption; Micro-structure adsorbent; Selectivity; Potential use; EFFICIENT SELENIUM(IV) DETECTION; TRACE PALLADIUM(II) DETECTION; TUNING MESOPOROUS ADSORBENT; OPTICAL COMPOSITE-MATERIAL; NANO-CONJUGATE ADSORBENT; LITHIUM ION BATTERIES; COPPER(II) IONS; CONTAMINATED WATER; PHOSPHATE REMOVAL; AQUEOUS-MEDIA;
D O I
10.1016/j.chemosphere.2021.129653
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The contamination of groundwater by arsenic (As) in Bangladesh is the biggest impairing of a population, with a large number of peoples affected. Specifically, groundwater of Gangetic Delta is alarmingly contaminated with arsenic. Similar, perilous circumstances exist in many other countries and consequently, there is a dire need to develop cost- effective decentralized filtration unit utilizing low-cost adsorbents for eliminating arsenic from water. Morphological synthesis of carbon with unique spherical, nanorod, and massive nanostructures were achieved by solvothermal method. Owing to their intrinsic adsorption properties and different nanostructures, these nanostructures were employed as adsorption of arsenic in aqueous solution, with the purpose to better understanding the morphological effect in adsorption. It clearly demonstrated that carbon with nanorods morphology exhibited an excellent adsorption activity of arsenite (about 82%) at pH 3, remarkably superior to the two with solid sphere and massive microstructures, because of its larger specific surface area, enhanced acid strength and improved adsorption capacity. Furthermore, we discovered that iron hydroxide radicals and energyinduced contact point formation in nanorods are the responsible for the high adsorption of As in aqueous solution. Thus, our work provides insides into the microstructure-dependent capability of different carbon for As adsorption applications. (C) 2021 Elsevier Ltd. All rights reserved.
引用
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页数:17
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