Abstract：
:This critical review discusses the potential use of agricultural waste based biosorbents (AWBs) for sequestering heavy metals in terms of their adsorption capacities, binding mechanisms, operating factors and pretreatment methods. The literature survey indicates that AWBs have shown equal or even greater adsorption capacities compared to conventional adsorbents. Thanks to modern molecular biotechnologies, the roles of functional groups in biosorption process are better understood. Of process factors, pH appears to be the most influential. In most cases, chemical pretreatments bring about an obvious improvement in metal uptake capacity. However, there are still several gaps, which require further investigation, such as (i) searching for novel, multi-function AWBs, (ii) developing cost-effective modification methods and (iii) assessing AWBs under multi-metal and real wastewater systems. Once these challenges are settled, the replacement of traditional adsorbents by AWBs in decontaminating heavy metals from wastewater can be expected in the future.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Nguyen TA,Ngo HH,Guo WS,Zhang J,Liang S,Yue QY,Li Q,Nguyen TVdoi
10.1016/j.biortech.2013.08.124subject
Has Abstractpub_date
2013-11-01 00:00:00pages
574-85eissn
0960-8524issn
1873-2976pii
S0960-8524(13)01375-8journal_volume
148pub_type
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