Abstract：
:Sustainable wastewater treatment necessitates the application of natural and green material in the approach. Thus, selecting a natural coagulant in leachate treatment is a crucial step in landfill operation to prevent secondary environmental pollution due to residual inorganic coagulant in treated effluent. Current study investigated the application of guar gum in landfill leachate treatment. Central composite design in response surface methodology was used to optimize the performance of Chemical Oxygen Demand (COD) removal. Quadratic model developed indicated the optimum COD removal 22.57% at guar gum dosage of 44.39 mg/L, pH 8.56 (natural pH of leachate) and mixing speed 79.27 rpm. Scanning electron microscopy showed that floc was compact and energy-dispersive-x-ray analysis showed that guar gum was capable to adsorb multiple ions from the leachate. Structural characterization using Fourier Transform Infrared analysis demonstrated that hydrogen bonding between guar and pollutant particles was involved in coagulation and flocculation process. Therefore, guar gum coagulant present potential to be an alternative in leachate treatment where pH requirement is not required during treatment. Simultaneously, adsorption by guar gum offers added pollutant removal advantage.
journal_name
Environ Resjournal_title
Environmental researchauthors
Cheng SY,Show PL,Juan JC,Ling TC,Lau BF,Lai SH,Ng EPdoi
10.1016/j.envres.2020.109737subject
Has Abstractpub_date
2020-09-01 00:00:00pages
109737eissn
0013-9351issn
1096-0953pii
S0013-9351(20)30630-7journal_volume
188pub_type
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journal_title：Environmental research
pub_type： 杂志文章
doi：10.1006/enrs.1995.1047
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pub_type： 杂志文章
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journal_title：Environmental research
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pub_type： 杂志文章
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journal_title：Environmental research
pub_type： 杂志文章
doi：10.1016/j.envres.2018.04.010
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doi：10.1016/j.envres.2017.03.038
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