出版社：Thai Society of Higher Eduction Institutes on Environment
摘要：The contamination of heavy metals in wastewater that has extremely low pH, is over thestandard limit for heavy metals (Pb and Cr), and has a high amount of total dissolvedsolids (TDS) is a serious problem in lead-acid battery manufacturing. Various studies haveshown that biosorption is an effective and economical technology for removing heavy metals.In this study, Cr (III) and Ni (II) adsorption of cuttlebone powder (CB) was tested, and CB wasapplied to treat wastewater generated by lead-acid battery manufacturing. The Cr (III) adsorptionof CB was optimum in an initial pH of 6.0 using CB 0.4 g/L; in addition, Ni (II) adsorptionwas optimum in an initial pH of 3.0 using CB 0.2 g/L. The adsorption kinetic was suitable, as itdemonstrated a high correlation coefficient (R2>0.9) with pseudo-second-order kinetic model.Both Cr (III) and Ni (II) adsorption were in equilibrium in 20 minutes. By Langmuir isotherm(R2>0.9), the maximum adsorption capacity of CB was 555.55 mg/g in Cr (III) adsorption and78.74 mg/g in Ni (II). CB was an effective biosorbent, pH neutralizer, and heavy metal remover.On the laboratory scale, lead-acid battery wastewater was successfully treated into the industrialeffluent standard limit using a combination of Ca(OH)2 pre-treatment and CB.
关键词：cuttlebone; biosorption; heavy metal removal; lead-acid battery wastewater treatment
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