Application of Raw and Modified Pomegranate Peel for Wastewater Treatment: A Literature Overview and Analysis

Table 4

Langmuir constants q_max (mg/g) of various untreated waste adsorbents for pollutant removal.

Natural adsorbent	Pollutant	qmax (mg/g)	References
Cucumber peel	Lead (II)	133.60	[46]
Rice straw	Cobalt (II)	28.5	[47]
L. domesticum peel	Nickel (II)	10.1	[48]
Litchi pericarp	Copper (II)	8.83	[5]
Peanut hull	Copper (II)	21.25	[49]
Jackfruit peels	Methylene blue	285.73	[50]
Coffee husks	Copper (II)	7.496	[51]
Coffee husks	Cadmium (II)	6.854	[51]
Coffee husks	Zinc (II)	5.565	[51]
Coffee husks	Chromium (VI)	6.961	[51]
Yellow passion	Methylene blue	44.70	[52]
Thuja orientalis	Acid blue 40	97.06	[53]
Coir pith	Nickel (II)	15.95	[54]
Coir pith	Cobalt (II)	12.82	[54]
Coir pith	Chromium (VI)	11.56	[54]
Pinus sylvestris	Nickel (II)	3.12	[55]
Pomegranate peel	Copper (II)	30.12	[17]
Pomegranate peel	Lead (II)	166.63	[21]
Pomegranate peel	Acid blue 40	125.93	[21]
Pomegranate peel	Methylene blue	36.36	[24]
Pomegranate peel	Nickel (II)	7.54	[29]
Pomegranate peel	Cobalt (II)	8.98	[29]
Pomegranate peel	Chromium (VI)	47.17	[27]