Biosorption of Copper and Lead in Aqueous Solution Using Cockle Shells

Name: Syazwan Bin OmarMatric no:Ke10022

Title • Biosorption of copper and lead in

aqueous solutions by cockle shells

Objective• Study the effects of different

operating parameters of Cu and Pb from aqueous solution by using cockle shells

Literature review

• Study from K. Chojnacka (2005) found that eggshell can be used as biosorbent for removing heavy metals from water.

Introduction

What is biosorption?

Why choose copper and plumbum to be removed?

What is sorbent that have in the cockle shells?

Problem statement

Environmental issue

Cost of treatment

Alternative way of

adsorption

Scope

Determine parameter of biosorption of

CaCO3 in cockle shells

Determine the equilibrium

adsorption of CaCO3.

determine the effectiveness of CaCO3 in biosorption

process

Determine Langmuir constant

coeffient for adsorbent,kd

Methodology

1. Chemicals preparationPrepare and make dilution of:-

Lead nitrate(Pb(NO3)2)

Copper sulfate (CuSO4)

0.01 NaOH 0.01 HCl

2. Preparation of biosorbent

Cockle shells will be obtained from local

market

cockles will be washed and scrubbed in tap water to remove dirt

Cockles will be boiled for 5 min and cooled at room temperature

the contents of the cockles leaving behind

the shells will be removed

Washed cockle and dried in oven at 50oC

cockles will be crushed using pestle and mortar

and grounded using grinder until they turned

into powder form

powder from the shells was then sieved in the

sieve shaker

3. Batch Absorption Experiments

3.1 . Effect on initial Cu and Pb concentration:

Concentration (Pb(NO3)2 and

(CuSO4) will be set up to (5, 10, 20, 40, 100

mg/L)

Add 1g of sorbent in 40ml of each solution and maintain at pH 5

Put into thermal shaker at 25°C and

120 rpm

After 24 hours,filter the sample and

measured metals concentration in

supernatant with AAS

3.2 Effect of pH on Cu(II) and Pb(II) adsorption:

0.01 M HCl or 0.01M NaOH will be used to measure the pH effect(5,6,7,8) on the sorption 1.0g of sorbent(CaCO3)

Set up metal solution to 60 mg/mL and mix with the sorbent.

Leave mixed solutions in thermal shaker 25°C and 120 rpm.

After 24 hours, filter the sample and measured metals concentration in supernatant with AAS.

3.3 Effect of Biosorbent Dosage on adsorption.

dosages that will be used from cockles are 1g, 2g, 3g and 4g for each 60

mg/mL

Leave mixed solutions in thermal shaker 25°C and

120 rpm.

After 24 hours, filter the sample and measured

metals concentration in supernatant with AAS.

Expected results

• Finding from M.Ahmad et al. (2012) the percentage of metal adsorbed was influenced by surface loading.

• Study from Y.Du et. al.(2010) that showed the adsorbent dosage influence the absorption of Pb.

• Finding from M.Ahmad et al. (2012) also stated that adsorption of Pb2+ and Cu2+ is pH dependent .

Reference from M.Ahmad et al. (2012), the amount and percentage of metal adsorption (Ads) and the distribution coefficient (Kd) for each added metal

concentration

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