Scientific Insights Into Modified and Non-Modified Biomaterials for Sorption of Heavy Metals From Water

Advanced Nanomaterials for Water Engineering, Treatment, and Hydraulics - Advances in Environmental Engineering and Green Technologies ◽

10.4018/978-1-5225-2136-5.ch002 ◽

2017 ◽

pp. 13-39

Author(s):

Tawfik A. Saleh ◽

Salawu Omobayo Adio ◽

Prakash Parthasarathy ◽

Gaddafi I. Danmaliki

Keyword(s):

Waste Water ◽

Heavy Metals ◽

Environmentally Friendly ◽

Operating Conditions ◽

Highly Efficient ◽

Factors Influencing ◽

Removal Of Heavy Metals ◽

Near Future

Adsorption techniques are widely used for the removal of various classes of pollutants from water due to their mild and facile operating conditions. The operations involved in the adsorption techniques are environmentally friendly, economical, highly selective on pollutants, highly efficient and easily operative. However, the adsorption of heavy metals from water using biomaterials (biosorption) is a relatively new and interesting technique which holds a great potential. Its effectiveness in lowering the heavy metals concentration to sub-ppb levels is appealing and has attracted increasing attention. The technique is believed to replace the existing technologies in the near future. This chapter discusses the prospects of biomaterials in the removal of heavy metals from waste water, the modification techniques that can enhance biosorption efficiency, and the factors influencing the biosorption processes.

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Scientific Insights Into Modified and Non-Modified Biomaterials for Sorption of Heavy Metals From Water

Waste Management ◽

10.4018/978-1-7998-1210-4.ch037 ◽

2020 ◽

pp. 807-827

Author(s):

Tawfik A. Saleh ◽

Salawu Omobayo Adio ◽

Prakash Parthasarathy ◽

Gaddafi I. Danmaliki

Keyword(s):

Waste Water ◽

Heavy Metals ◽

Environmentally Friendly ◽

Operating Conditions ◽

Highly Efficient ◽

Factors Influencing ◽

Removal Of Heavy Metals ◽

Near Future

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Role of Bioadsorbents in Reducing Toxic Metals

Journal of Toxicology ◽

10.1155/2016/4369604 ◽

2016 ◽

Vol 2016 ◽

pp. 1-13 ◽

Cited By ~ 18

Author(s):

Blessy Baby Mathew ◽

Monisha Jaishankar ◽

Vinai George Biju ◽

Krishnamurthy Nideghatta Beeregowda

Keyword(s):

Waste Water ◽

Heavy Metals ◽

Toxic Metals ◽

Metal Ion ◽

Lead And Cadmium ◽

Oil Palm Shell ◽

Effective Removal ◽

Removal Of Heavy Metals ◽

Near Future

Industrialization and urbanization have led to the release of increasing amounts of heavy metals into the environment. Metal ion contamination of drinking water and waste water is a serious ongoing problem especially with high toxic metals such as lead and cadmium and less toxic metals such as copper and zinc. Several biological materials have attracted many researchers and scientists as they offer both cheap and effective removal of heavy metals from waste water. Therefore it is urgent to study and explore all possible sources of agrobased inexpensive adsorbents for their feasibility in the removal of heavy metals. The objective was to study inexpensive adsorbents like various agricultural wastes such as sugarcane bagasse, rice husk, oil palm shell, coconut shell, and coconut husk in eliminating heavy metals from waste water and their utilization possibilities based on our research and literature survey. It also shows the significance of developing and evaluating new potential biosorbents in the near future with higher adsorption capacity and greater reusable options.

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Understanding the factors influencing the removal of heavy metals in urban stormwater runoff

Water Science & Technology ◽

10.2166/wst.2016.153 ◽

2016 ◽

Vol 73 (12) ◽

pp. 2921-2928 ◽

Cited By ~ 3

Author(s):

Marla C. Maniquiz-Redillas ◽

Lee-Hyung Kim

Keyword(s):

Heavy Metals ◽

Fine Particles ◽

Metal Removal ◽

Low Impact Development ◽

Heavy Metal Removal ◽

Stormwater Runoff ◽

Winter Season ◽

Filter Media ◽

Factors Influencing ◽

Removal Of Heavy Metals

Abstract In this research, an infiltration trench equipped with an extensive pretreatment and filter bed consisting of woodchip, sand and gravel was utilized as a low impact development technique to manage stormwater runoff from a highly impervious road with particular emphasis on heavy metal removal. Findings revealed that the major factors influencing the removal of heavy metals were the concentration of the particulate matters and heavy metals in runoff, runoff volume and flow rates. The reduction of heavy metals was enhanced by sedimentation of particulates through pretreatment. Fine particles (<2 mm) had the most significant amount of heavy metals, thus, enhanced adsorption and filtration using various filter media were important design considerations. Sediment was most highly attached on the surface area of woodchip than to other filter media like sand, gravel and geotextile. It is suggested that maintenance must be performed after the end of the winter season wherein high sediment rate was observed to maintain the efficiency of the treatment system.

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